[maven-release-plugin] prepare release ebean-11.19.2

Change to add generics for FetchGroup

.editorconfig

@@ -10,3 +10,4 @@ indent_style = space
 insert_final_newline = true
 trim_trailing_whitespace = true
 spaces_around_operators = true
+max_line_length = 130

.gitignore

@@ -20,3 +20,4 @@ profiling/
 *.ipr
 *.iws
 .idea/
+*uuid.state

CONFIGURATION.md

@@ -0,0 +1,298 @@
+Overview of ebean.properties file
+=================================
+
+
+### DbMigration options
+
+You can set individual values for different platforms when generating migrations
+
+`dbmigration.platform.<PLATFORM>.databaseSequenceBatchSize`
+For DB's using sequences this is the number of sequence values prefetched.
+ 
+`dbmigration.platform.<PLATFORM>.dbuuid`
+Control, how UUID generation should work - it affects DDL which column type is generated. Possible values:
+- BINARY enforces binary UUID 
+- VARCHAR enforces varchar UUID
+- BINARY_OPTIMIZED enforces binary-optimized UUID (makes sense only with Type1 ID)
+- AUTO_BINARY use binary when platform does not support native UUID
+- AUTO_BINARY_OPTIMIZED use binary-optimized when platform does not support native UUID
+- AUTO_VARCHAR (default) use varchar when platform does not support UUID 
+
+`dbmigration.platform.<PLATFORM>.uuidStoreAsBinary`
+Same as setting dbuuid to BINARY
+
+`dbmigration.platform.<PLATFORM>.geometrySRID`
+The Geometry SRID value (default 4326).
+
+`dbmigration.platform.<PLATFORM>.idType`
+The ID type (IDENTITY, SEQUENCE, GENERATOR, EXTERNAL)
+
+`dbmigration.platform.<PLATFORM>.mapping`
+Adjust the mapping. For example `BOOLEAN=integer(32);BIT=tinyint(3)`
+
+
+`ebean.migration.applyPrefix`
+Set this to "V" to be compatible with FlywayDB.
+
+`ebean.migration.applySuffix`
+Defaults to '.sql'
+
+`ebean.migration.dbusername`
+DB user used to run the DB migration.
+
+`ebean.migration.dbpassword`
+DB password used to run the DB migration.
+
+`ebean.migration.generate`
+Set to true if the DB migration should be generated on server start.
+
+`ebean.migration.generatePendingDrop`
+The version of a pending drop that should be generated as the next migration.
+
+`ebean.migration.includeGeneratedFileComment`
+TODO
+
+`ebean.migration.metaTable`
+For running migration the DB table that holds migration execution status. Default 'db_migration'
+
+`ebean.migration.migrationPath`
+Resource path for the migration xml and sql.
+
+`ebean.migration.modelPath`
+Subdirectory the model xml files go into. Default 'model'
+
+`ebean.migration.modelSuffix`
+Suffix. Default '.model.xml' 
+
+`ebean.migration.name`
+Description text that can be appended to the version to become the ddl script file name
+ 
+`ebean.migration.patchInsertOn`
+migration versions that should be added to history without running.
+
+`ebean.migration.patchResetChecksumOn`
+migration versions that should have their checksum reset and not run.
+Use this if you get a 'Checksum mismatch' error.
+
+`ebean.migration.placeholders`
+A comma and equals delimited placeholders that are substituted in SQL scripts when running migration (used by DB Migration runner only).
+
+`ebean.migration.platform`
+The database platform to generate migration DDL for.
+
+`ebean.migration.run`
+Flag set to true means to run any outstanding migrations on startup.
+
+`ebean.migration.version`
+The migration version name (typically FlywayDb compatible). Example: 1.1.1_2
+
+
+### Ebean UUID options
+
+`ebean.uuidVersion`
+Controls, how the UUIDs are generated. Possible values
+- VERSION4 (default) generate random V4 UUIDs,
+- VERSION1 generate rfc4122 compliant Type 1 UUIDs (requires a state file)
+- VERSION1RND generate fake Type 1 UUIDs
+
+Note, that V1 UUIDs in conjunction with AUTO_BINARY_OPTIMIZED will give you the best index performance, but you MUST understand how this works to avoid collisions.
+
+`ebean.uuidStateFile`
+The state file that is Required to generate V1 UUIDs
+
+
+### DocStoreConfig
+
+`ebean.docstore.active`
+True when the Document store integration is active/on.
+
+`ebean.docstore.allowAllCertificates`
+Set to true such that the client allows connections to invalid/self signed SSL certificates.
+
+`ebean.docstore.bulkBatchSize`
+The default batch size to use for the Bulk API calls.
+
+`ebean.docstore.create`
+When true the Document store should create any document indexes that don't already exist.
+
+`ebean.docstore.dropCreate`
+When true the Document store should drop and re-create document indexes.
+
+`ebean.docstore.generateMapping`
+Set to true means Ebean will generate mapping files on startup.
+
+`ebean.docstore.mappingPath`
+Resource path for the Document store mapping files.
+
+`ebean.docstore.mappingSuffix`
+Suffix used for mapping files.
+
+`ebean.docstore.password`
+ Password credential that be used for authentication to document store.
+ 
+`ebean.docstore.pathToResources`
+Location of resources that mapping files are generated into.
+
+`ebean.docstore.persist`
+The default mode used by indexes. `DEFAULT|IGNORE|QUEUE|UPDATE`
+
+`ebean.docstore.url`
+The URL of the Document store server. For example: http://localhost:9200.
+
+`ebean.docstore.username`
+Credential that be used for authentication to document store.
+
+### Ebean Autotune
+
+`ebean.autoTune.mode`
+The autoTune mode `DEFAULT_OFF|DEFAULT_ON|DEFAULT_ONIFEMPTY`
+
+`ebean.autoTune.profiling`
+TODO
+
+`ebean.autoTune.profilingBase`
+TODO
+
+`ebean.autoTune.profilingFile`
+TODO
+
+`ebean.autoTune.profilingRate`
+TODO
+
+`ebean.autoTune.profilingUpdateFrequency`
+TODO
+
+`ebean.autoTune.queryTuning`
+TODO
+
+`ebean.autoTune.queryTuningAddVersion`
+TODO
+
+`ebean.autoTune.queryTuningFile`
+TODO
+
+`ebean.autoTune.skipGarbageCollectionOnShutdown`
+TODO
+
+`ebean.autoTune.skipProfileReportingOnShutdown`
+TODO
+
+
+### Ebean options
+`ebean.allQuotedIdentifiers`
+Quote all identifiers
+
+`ebean.asOfSysPeriod`
+Column used to support history and 'As of' queries. This column is a timestamp range or equivalent.
+
+`ebean.asOfViewSuffix`
+Suffix appended to the base table to derive the view that contains the union of the base table and the history table in order to support asOf queries.
+
+`ebean.autoCommitMode`
+Set to true if the DataSource uses autoCommit. Indicates that Ebean should use autoCommit friendly Transactions and TransactionManager.
+
+`ebean.autoReadOnlyDataSource`
+When true create a read only DataSource using readOnlyDataSourceConfig defaulting values from dataSourceConfig
+
+`ebean.autostart`
+Should the server start all
+
+`ebean.backgroundExecutorSchedulePoolSize`
+TODO
+
+`ebean.backgroundExecutorShutdownSecs`
+TODO
+
+and some more todos:
+`ebean.batch.mode`
+`ebean.batch.size`
+`ebean.changeLogAsync`
+`ebean.changeLogIncludeInserts`
+`ebean.classes`
+`ebean.collectQueryOrigins`
+`ebean.collectQueryStatsByNode`
+`ebean.currentUserProvider`
+`ebean.dataSourceJndiName`
+`ebean.dataTimeZone`
+`ebean.databaseBooleanFalse`
+`ebean.databaseBooleanTrue`
+`ebean.databasePlatform`
+`ebean.databasePlatformName`
+`ebean.databaseSequenceBatchSize`
+ebean.datasource.h2.adminpassword
+ebean.datasource.h2.adminusername
+`ebean.dbEncrypt`
+`ebean.dbOffline`
+ebean.ddl.createOnly
+ebean.ddl.generate
+ebean.ddl.header
+ebean.ddl.initSql
+ebean.ddl.run
+ebean.ddl.seedSql
+ebean.defaultDeleteMissingChildren
+ebean.defaultOrderById
+ebean.disableClasspathSearch
+ebean.disableL2Cache
+ebean.docStoreOnly
+ebean.docstore.active
+ebean.docstore.allowAllCertificates
+ebean.docstore.bulkBatchSize
+ebean.docstore.create
+ebean.docstore.dropCreate
+ebean.docstore.generateMapping
+ebean.docstore.mappingPath
+ebean.docstore.mappingSuffix
+ebean.docstore.password
+ebean.docstore.pathToResources
+ebean.docstore.persist
+ebean.docstore.url
+ebean.docstore.username
+ebean.encryptDeployManager
+ebean.encryptKeyManager
+ebean.encryptor
+ebean.explicitTransactionBeginMode
+ebean.expressionEqualsWithNullAsNoop
+ebean.expressionNativeIlike
+ebean.geometrySRID
+ebean.historyTableSuffix
+ebean.jdbcFetchSizeFindEach
+ebean.jdbcFetchSizeFindList
+ebean.jodaLocalTimeMode
+ebean.jsonDateTime
+ebean.jsonInclude
+ebean.lazyLoadBatchSize
+ebean.localTimeWithNanos
+ebean.namingConvention.schema
+ebean.namingConvention.sequenceFormat
+ebean.namingConvention.useForeignKeyPrefix
+ebean.namingconvention
+ebean.notifyL2CacheInForeground
+ebean.packages
+ebean.persistBatch
+ebean.persistBatchOnCascade
+ebean.persistBatchSize
+ebean.persistBatching
+ebean.persistenceContextScope
+ebean.profiling
+ebean.profiling.directory
+ebean.profiling.includeProfileIds
+ebean.profiling.minimumMicros
+ebean.profiling.profilesPerFile
+ebean.profiling.verbose
+ebean.queryBatchSize
+ebean.queryPlanTTLSeconds
+ebean.search.packages
+ebean.serverCachePlugin
+ebean.skipCacheAfterWrite
+ebean.slowQueryMillis
+ebean.tenant.catalogProvider
+ebean.tenant.currentTenantProvider
+ebean.tenant.mode
+ebean.tenant.partitionColumn
+ebean.tenant.schemaProvider
+ebean.updateAllPropertiesInBatch
+ebean.updateChangesOnly
+ebean.updatesDeleteMissingChildren
+ebean.useJavaxValidationNotNull
+ebean.useJtaTransactionManager
+

README.md

@@ -11,7 +11,7 @@ Goto [https://ebean-orm.github.io/](http://ebean-orm.github.io/ "Ebean ORM's Web
 [Maven central - all related projects](http://search.maven.org/#search%7Cga%7C1%7Cebean "maven central all related projects")
 
 ## Current versions
-* [![Maven Central : ebean](https://maven-badges.herokuapp.com/maven-central/io.ebean/ebean/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.avaje.ebean/ebean) - ebean
-* [![Maven Central : ebean-agent](https://maven-badges.herokuapp.com/maven-central/io.ebean/ebean-agent/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.avaje.ebean/ebean-agent) - ebean-agent
-* [![Maven Central : ebean-maven-plugin](https://maven-badges.herokuapp.com/maven-central/io.ebean/ebean-maven-plugin/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.avaje.ebean/ebean-maven-plugin) - ebean-maven-plugin
+* [![Maven Central : ebean](https://maven-badges.herokuapp.com/maven-central/io.ebean/ebean/badge.svg)](https://maven-badges.herokuapp.com/maven-central/io.ebean/ebean) - ebean
+* [![Maven Central : ebean-agent](https://maven-badges.herokuapp.com/maven-central/io.ebean/ebean-agent/badge.svg)](https://maven-badges.herokuapp.com/maven-central/io.ebean/ebean-agent) - ebean-agent
+* [![Maven Central : ebean-maven-plugin](https://maven-badges.herokuapp.com/maven-central/io.ebean/ebean-maven-plugin/badge.svg)](https://maven-badges.herokuapp.com/maven-central/io.ebean/ebean-maven-plugin) - ebean-maven-plugin
 

pom.xml

@@ -9,15 +9,20 @@
 
   <groupId>io.ebean</groupId>
   <artifactId>ebean</artifactId>
-  <version>11.12.1</version>
+  <version>11.19.2</version>
   <packaging>jar</packaging>
 
   <name>ebean</name>
   <url>http://ebean-orm.github.io/</url>
 
+  <properties>
+    <jackson-core.version>2.9.5</jackson-core.version>
+    <snakeyaml.version>1.21</snakeyaml.version>
+  </properties>
+
   <scm>
     <developerConnection>scm:git:git@github.com:ebean-orm/ebean.git</developerConnection>
-    <tag>ebean-11.12.1</tag>
+    <tag>ebean-11.19.2</tag>
   </scm>
 
   <profiles>
@@ -89,7 +94,7 @@
     <dependency>
       <groupId>org.yaml</groupId>
       <artifactId>snakeyaml</artifactId>
-      <version>1.19</version>
+      <version>${snakeyaml.version}</version>
     </dependency>
 
     <!--
@@ -112,13 +117,13 @@
     <dependency>
       <groupId>io.ebean</groupId>
       <artifactId>ebean-annotation</artifactId>
-      <version>3.8</version>
+      <version>4.1</version>
     </dependency>
 
     <dependency>
       <groupId>org.avaje</groupId>
       <artifactId>avaje-datasource</artifactId>
-      <version>3.1.1</version>
+      <version>3.2.2</version>
     </dependency>
 
     <dependency>
@@ -130,27 +135,27 @@
     <dependency>
       <groupId>io.ebean</groupId>
       <artifactId>ebean-migration</artifactId>
-      <version>11.3.1</version>
+      <version>11.7.1</version>
     </dependency>
 
     <dependency>
       <groupId>org.antlr</groupId>
       <artifactId>antlr4-runtime</artifactId>
-      <version>4.6</version>
+      <version>4.7.1</version>
     </dependency>
 
     <!-- Jackson core used internally by Ebean -->
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-core</artifactId>
-      <version>2.9.0</version>
+      <version>${jackson-core.version}</version>
     </dependency>
 
     <!-- provided scope for JsonNode support -->
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-databind</artifactId>
-      <version>2.9.0</version>
+      <version>${jackson-core.version}</version>
       <scope>provided</scope>
     </dependency>
 
@@ -187,7 +192,7 @@
     <dependency>
       <groupId>org.postgresql</groupId>
       <artifactId>postgresql</artifactId>
-      <version>9.4.1212</version>
+      <version>42.2.2</version>
       <scope>provided</scope>
     </dependency>
 
@@ -224,7 +229,7 @@
     <dependency>
       <groupId>io.ebean</groupId>
       <artifactId>ebean-agent</artifactId>
-      <version>11.10.1</version>
+      <version>11.11.1</version>
       <scope>test</scope>
     </dependency>
 
@@ -254,7 +259,7 @@
     <dependency>
       <groupId>com.microsoft.sqlserver</groupId>
       <artifactId>mssql-jdbc</artifactId>
-      <version>6.1.3.jre8-preview</version>
+      <version>6.4.0.jre8</version>
       <scope>test</scope>
     </dependency>
 
@@ -297,7 +302,7 @@
       <plugin>
         <groupId>io.ebean</groupId>
         <artifactId>ebean-maven-plugin</artifactId>
-        <version>11.10.1</version>
+        <version>11.11.1</version>
         <executions>
           <execution>
             <id>test</id>
@@ -355,7 +360,7 @@
         <artifactId>maven-javadoc-plugin</artifactId>
         <version>2.9.1</version>
         <configuration>
-          <doctitle>Ebean 10</doctitle>
+          <doctitle>Ebean 11</doctitle>
           <overview>src/main/java/io/ebean/overview.html</overview>
           <source>1.8</source>
           <doclet>org.avaje.doclet.PygmentsDoclet</doclet>

src/main/java/io/ebean/BeanRepository.java

@@ -2,6 +2,8 @@ package io.ebean;
 
 import io.ebean.bean.EntityBean;
 
+import java.util.Collection;
+
 /**
  * Provides finder functionality for use with "Dependency Injection style" use of Ebean.
  * <p>
@@ -115,6 +117,13 @@ public abstract class BeanRepository<I, T> extends BeanFinder<I, T> {
     db().save(bean);
   }
 
+  /**
+   * Save all the beans in the collection.
+   */
+  public int saveAll(Collection<T> bean) {
+    return db().saveAll(bean);
+  }
+
   /**
    * Update this entity.
    *
@@ -154,6 +163,13 @@ public abstract class BeanRepository<I, T> extends BeanFinder<I, T> {
     return db().delete(bean);
   }
 
+  /**
+   * Delete all the beans in the collection.
+   */
+  public int deleteAll(Collection<T> beans) {
+    return db().deleteAll(beans);
+  }
+
   /**
    * Delete a bean permanently without soft delete.
    * <p>
@@ -167,6 +183,30 @@ public abstract class BeanRepository<I, T> extends BeanFinder<I, T> {
     return db().deletePermanent(bean);
   }
 
+  /**
+   * Merge this entity using the default merge options.
+   * <p>
+   * Ebean will detect if this is a new bean or a previously fetched bean and perform either an
+   * insert or an update based on that.
+   *
+   * @see EbeanServer#merge(Object)
+   */
+  public void merge(T bean) {
+    db().merge(bean);
+  }
+
+  /**
+   * Merge this entity using the specified merge options.
+   * <p>
+   * Ebean will detect if this is a new bean or a previously fetched bean and perform either an
+   * insert or an update based on that.
+   *
+   * @see EbeanServer#merge(Object, MergeOptions)
+   */
+  public void merge(T bean, MergeOptions options) {
+    db().merge(bean, options);
+  }
+
   /**
    * Refreshes this entity from the database.
    *

src/main/java/io/ebean/CountDistinctOrder.java

@@ -0,0 +1,27 @@
+package io.ebean;
+/**
+ * Enumeration to use with {@link Query#setCountDistinct(CountDistinctOrder)}.
+ * @author Roland Praml, FOCONIS AG
+ *
+ */
+public enum CountDistinctOrder {
+  NO_ORDERING,
+  
+  /** order by attribute ascending */
+  ATTR_ASC, 
+  
+  /** order by attribute descending */
+  ATTR_DESC, 
+  
+  /** order by count ascending and attribute ascending */
+  COUNT_ASC_ATTR_ASC,
+  
+  /** order by count ascending and attribute descending */
+  COUNT_ASC_ATTR_DESC,
+  
+  /** order by count descending and attribute ascending */
+  COUNT_DESC_ATTR_ASC,
+  
+  /** order by count descending and attribute descending */
+  COUNT_DESC_ATTR_DESC,
+}

src/main/java/io/ebean/CountedValue.java

@@ -0,0 +1,33 @@
+package io.ebean;
+
+import java.io.Serializable;
+/**
+ * Holds a distinct value with it's count.
+ * (Used with {@link Query#findSingleAttributeList()} and {@link Query#setCountDistinct(CountDistinctOrder)}.)
+ * @author Roland Praml, FOCONIS AG
+ */
+public class CountedValue<A> implements Serializable {
+  private static final long serialVersionUID = -2267971668356749695L;
+
+  private final A value;
+  private final long count;
+
+  public CountedValue(A value, long count) {
+    this.value = value;
+    this.count = count;
+  }
+
+  public long getCount() {
+    return count;
+  }
+  
+  public A getValue() {
+    return value;
+  }
+  
+  @Override
+  public String toString() {
+    return count + ": " + value;
+  }
+  
+}

src/main/java/io/ebean/DtoQuery.java

@@ -0,0 +1,133 @@
+package io.ebean;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Consumer;
+import java.util.function.Predicate;
+
+/**
+ * Query for performing native SQL queries that return DTO Bean's.
+ * <p>
+ * These beans are just normal classes. They must have public constructors
+ * and setters.
+ * <p>
+ * Constructors with arguments are used if the number of constructor arguments
+ * matches the number of columns in the resultSet.
+ * </p>
+ * <p>
+ * If the number of columns in the resultSet is greater than the largest constructor
+ * then the largest constructor is used for the first columns and remaining columns
+ * are mapped by setter methods.
+ * </p>
+ *
+ * <pre>{@code
+ *
+ *   // CustomerDto is just a 'bean like' class
+ *   // with public constructor(s) and public setter methods
+ *
+ *   String sql = "select id, name from customer where name like :name and status_code = :status";
+ *
+ *   List<CustomerDto> beans =
+ *     Ebean.findDto(CustomrDto.class, sql)
+ *     .setParameter("name", "Acme%")
+ *     .setParameter("status", "ACTIVE")
+ *     .findList();
+ *
+ * }</pre>
+ */
+public interface DtoQuery<T> {
+
+  /**
+   * Execute the query returning a list.
+   */
+  @Nonnull
+  List<T> findList();
+
+  /**
+   * Execute the query iterating a row at a time.
+   * <p>
+   * This streaming type query is useful for large query execution as only 1 row needs to be held in memory.
+   * </p>
+   */
+  void findEach(Consumer<T> consumer);
+
+  /**
+   * Execute the query iterating a row at a time with the ability to stop consuming part way through.
+   * <p>
+   * Returning false after processing a row stops the iteration through the query results.
+   * </p>
+   * <p>
+   * This streaming type query is useful for large query execution as only 1 row needs to be held in memory.
+   * </p>
+   */
+  void findEachWhile(Predicate<T> consumer);
+
+  /**
+   * Execute the query returning a single bean.
+   */
+  @Nullable
+  T findOne();
+
+  /**
+   * Execute the query returning an optional bean.
+   */
+  @Nonnull
+  Optional<T> findOneOrEmpty();
+
+  /**
+   * The same as bind for named parameters.
+   */
+  DtoQuery<T> setParameter(String name, Object value);
+
+  /**
+   * The same as bind for positioned parameters.
+   */
+  DtoQuery<T> setParameter(int position, Object value);
+
+  /**
+   * Set the index of the first row of the results to return.
+   */
+  DtoQuery<T> setFirstRow(int firstRow);
+
+  /**
+   * Set the maximum number of query results to return.
+   */
+  DtoQuery<T> setMaxRows(int maxRows);
+
+  /**
+   * When resultSet columns are not able to be mapped to a bean property then instead of
+   * throwing effectively skip reading that column.
+   */
+  DtoQuery<T> setRelaxedMode();
+
+  /**
+   * Set a label on the query to make it easier to identify queries related to query execution statistics.
+   *
+   * @param label A label that is unique to the DTO bean type.
+   */
+  DtoQuery<T> setLabel(String label);
+
+  /**
+   * Set a timeout on this query.
+   * <p>
+   * This will typically result in a call to setQueryTimeout() on a
+   * preparedStatement. If the timeout occurs an exception will be thrown - this
+   * will be a SQLException wrapped up in a PersistenceException.
+   * </p>
+   *
+   * @param secs the query timeout limit in seconds. Zero means there is no limit.
+   */
+  DtoQuery<T> setTimeout(int secs);
+
+  /**
+   * A hint which for JDBC translates to the Statement.fetchSize().
+   * <p>
+   * Gives the JDBC driver a hint as to the number of rows that should be
+   * fetched from the database when more rows are needed for ResultSet.
+   * </p>
+   */
+  DtoQuery<T> setBufferFetchSizeHint(int bufferFetchSizeHint);
+
+}

src/main/java/io/ebean/Ebean.java

@@ -3,11 +3,13 @@ package io.ebean;
 import io.ebean.annotation.TxIsolation;
 import io.ebean.cache.ServerCacheManager;
 import io.ebean.config.ServerConfig;
+import io.ebean.plugin.Property;
 import io.ebean.text.csv.CsvReader;
 import io.ebean.text.json.JsonContext;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import javax.persistence.OptimisticLockException;
 import javax.persistence.PersistenceException;
@@ -15,6 +17,7 @@ import java.util.Collection;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -113,10 +116,11 @@ import java.util.concurrent.ConcurrentHashMap;
  */
 public final class Ebean {
   private static final Logger logger = LoggerFactory.getLogger(Ebean.class);
+
   static {
     EbeanVersion.getVersion(); // initalizes the version class and logs the version.
   }
- 
+
   /**
    * Manages creation and cache of EbeanServers.
    */
@@ -371,7 +375,7 @@ public final class Ebean {
    * Note that this provides an try finally alternative to using {@link #executeCall(TxScope, Callable)} or
    * {@link #execute(TxScope, Runnable)}.
    * </p>
-   *
+   * <p>
    * <h3>REQUIRES_NEW example:</h3>
    * <pre>{@code
    * // Start a new transaction. If there is a current transaction
@@ -634,6 +638,25 @@ public final class Ebean {
     serverMgr.getDefaultServer().updateAll(beans);
   }
 
+  /**
+   * Merge the bean using the default merge options.
+   *
+   * @param bean The bean to merge
+   */
+  public static void merge(Object bean) {
+    serverMgr.getDefaultServer().merge(bean);
+  }
+
+  /**
+   * Merge the bean using the given merge options.
+   *
+   * @param bean    The bean to merge
+   * @param options The options to control the merge
+   */
+  public static void merge(Object bean, MergeOptions options) {
+    serverMgr.getDefaultServer().merge(bean, options);
+  }
+
   /**
    * Save all the beans from a Collection.
    */
@@ -641,6 +664,65 @@ public final class Ebean {
     return serverMgr.getDefaultServer().saveAll(beans);
   }
 
+  /**
+   * This method checks the uniqueness of a bean. I.e. if the save will work. It will return the
+   * properties that violates an unique / primary key. This may be done in an UI save action to
+   * validate if the user has entered correct values.
+   * <p>
+   * Note: This method queries the DB for uniqueness of all indices, so do not use it in a batch update.
+   * <p>
+   * Note: This checks only the root bean!
+   * <p>
+   * <pre>{@code
+   *
+   *   // there is a unique constraint on title
+   *
+   *   Document doc = new Document();
+   *   doc.setTitle("One flew over the cuckoo's nest");
+   *   doc.setBody("clashes with doc1");
+   *
+   *   Set<Property> properties = server().checkUniqueness(doc);
+   *
+   *   if (properties.isEmpty()) {
+   *     // it is unique ... carry on
+   *
+   *   } else {
+   *     // build a user friendly message
+   *     // to return message back to user
+   *
+   *     String uniqueProperties = properties.toString();
+   *
+   *     StringBuilder msg = new StringBuilder();
+   *
+   *     properties.forEach((it)-> {
+   *       Object propertyValue = it.getVal(doc);
+   *       String propertyName = it.getName();
+   *       msg.append(" property["+propertyName+"] value["+propertyValue+"]");
+   *     });
+   *
+   *     // uniqueProperties > [title]
+   *     //       custom msg > property[title] value[One flew over the cuckoo's nest]
+   *
+   *  }
+   *
+   * }</pre>
+   *
+   * @param bean The entity bean to check uniqueness on
+   * @return a set of Properties if constraint validation was detected or empty list.
+   */
+  @Nonnull
+  public static Set<Property> checkUniqueness(Object bean) {
+    return serverMgr.getDefaultServer().checkUniqueness(bean);
+  }
+
+  /**
+   * Same as {@link #checkUniqueness(Object)}. but with given transaction.
+   */
+  @Nonnull
+  public static Set<Property> checkUniqueness(Object bean, Transaction transaction) {
+    return serverMgr.getDefaultServer().checkUniqueness(bean, transaction);
+  }
+
   /**
    * Delete the bean.
    * <p>
@@ -1053,6 +1135,21 @@ public final class Ebean {
     return serverMgr.getDefaultServer().findNative(beanType, nativeSql);
   }
 
+  /**
+   * Create a Query for DTO beans.
+   * <p>
+   * DTO beans are just normal bean like classes with public constructor(s) and setters.
+   * They do not need to be registered with Ebean before use.
+   * </p>
+   *
+   * @param dtoType The type of the DTO bean the rows will be mapped into.
+   * @param sql     The SQL query to execute.
+   * @param <T>     The type of the DTO bean.
+   */
+  public static <T> DtoQuery<T> findDto(Class<T> dtoType, String sql) {
+    return serverMgr.getDefaultServer().findDto(dtoType, sql);
+  }
+
   /**
    * Create an Update query to perform a bulk update.
    * <p>

src/main/java/io/ebean/EbeanServer.java

@@ -4,13 +4,13 @@ import io.ebean.annotation.TxIsolation;
 import io.ebean.cache.ServerCacheManager;
 import io.ebean.config.ServerConfig;
 import io.ebean.meta.MetaInfoManager;
+import io.ebean.plugin.Property;
 import io.ebean.plugin.SpiServer;
 import io.ebean.text.csv.CsvReader;
 import io.ebean.text.json.JsonContext;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
-
 import javax.persistence.NonUniqueResultException;
 import javax.persistence.OptimisticLockException;
 import javax.persistence.PersistenceException;
@@ -424,6 +424,32 @@ public interface EbeanServer {
    */
   <T> Update<T> createUpdate(Class<T> beanType, String ormUpdate);
 
+  /**
+   * Create a Query for DTO beans.
+   * <p>
+   * DTO beans are just normal bean like classes with public constructor(s) and setters.
+   * They do not need to be registered with Ebean before use.
+   * </p>
+   *
+   * @param dtoType The type of the DTO bean the rows will be mapped into.
+   * @param sql     The SQL query to execute.
+   * @param <T>     The type of the DTO bean.
+   */
+  <T> DtoQuery<T> findDto(Class<T> dtoType, String sql);
+
+  /**
+   * Create a named Query for DTO beans.
+   * <p>
+   * DTO beans are just normal bean like classes with public constructor(s) and setters.
+   * They do not need to be registered with Ebean before use.
+   * </p>
+   *
+   * @param dtoType    The type of the DTO bean the rows will be mapped into.
+   * @param namedQuery The name of the query
+   * @param <T>        The type of the DTO bean.
+   */
+  <T> DtoQuery<T> createNamedDtoQuery(Class<T> dtoType, String namedQuery);
+
   /**
    * Create a SqlQuery for executing native sql
    * query statements.
@@ -495,30 +521,44 @@ public interface EbeanServer {
    * etc.
    * </p>
    * <p>
+   * <h3>Using try with resources</h3>
    * <pre>{@code
    *
    *    // start a transaction (stored in a ThreadLocal)
-   *    ebeanServer.beginTransaction();
+   *
+   *    try (Transaction txn = ebeanServer.beginTransaction()) {
+   *
+   * 	    Order order = ebeanServer.find(Order.class,10);
+   * 	    ...
+   * 	    ebeanServer.save(order);
+   *
+   * 	    txn.commit();
+   *    }
+   *
+   * }</pre>
+   * <p>
+   * <h3>Using try finally block</h3>
+   * <pre>{@code
+   *
+   *    // start a transaction (stored in a ThreadLocal)
+   *    Transaction txn = ebeanServer.beginTransaction();
    *    try {
    * 	    Order order = ebeanServer.find(Order.class,10);
    *
    * 	    ebeanServer.save(order);
    *
-   * 	    ebeanServer.commitTransaction();
+   * 	    txn.commit();
    *
    *    } finally {
-   * 	    // rollback if we didn't commit
-   * 	    // i.e. an exception occurred before commitTransaction().
-   * 	    ebeanServer.endTransaction();
+   * 	    txn.end();
    *    }
    *
    * }</pre>
    * <p>
-   * <h3>Transaction options:</h3>
+   * <h3>Transaction options</h3>
    * <pre>{@code
    *
-   *     Transaction txn = ebeanServer.beginTransaction();
-   *     try {
+   *     try (Transaction txn = ebeanServer.beginTransaction()) {
    *       // explicitly turn on/off JDBC batch use
    *       txn.setBatchMode(true);
    *       txn.setBatchSize(50);
@@ -539,10 +579,6 @@ public interface EbeanServer {
    *       ...
    *
    *       txn.commit();
-   *
-   *    } finally {
-   *       // rollback if necessary
-   *       txn.end();
    *    }
    *
    * }</pre>
@@ -572,19 +608,16 @@ public interface EbeanServer {
    * <pre>{@code
    * // Start a new transaction. If there is a current transaction
    * // suspend it until this transaction ends
-   * Transaction txn = server.beginTransaction(TxScope.requiresNew());
-   * try {
+   * try (Transaction txn = server.beginTransaction(TxScope.requiresNew())) {
    *
    *   ...
    *
    *   // commit the transaction
    *   txn.commit();
    *
-   * } finally {
-   *   // end this transaction which:
-   *   //  A) will rollback transaction if it has not been committed already
+   *   // At end this transaction will:
+   *   //  A) will rollback transaction if it has not been committed
    *   //  B) will restore a previously suspended transaction
-   *   txn.end();
    * }
    *
    * }</pre>
@@ -593,20 +626,13 @@ public interface EbeanServer {
    * <pre>{@code
    *
    * // start a new transaction if there is not a current transaction
-   * Transaction txn = server.beginTransaction(TxScope.required());
-   * try {
+   * try (Transaction txn = server.beginTransaction(TxScope.required())) {
    *
    *   ...
    *
    *   // commit the transaction if it was created or
    *   // do nothing if there was already a current transaction
    *   txn.commit();
-   *
-   * } finally {
-   *   // end this transaction which will rollback the transaction
-   *   // if it was created for this try finally scope and has not
-   *   // already been committed
-   *   txn.end();
    * }
    *
    * }</pre>
@@ -782,411 +808,18 @@ public interface EbeanServer {
   <T> T getReference(Class<T> beanType, Object id);
 
   /**
-   * Return the number of 'top level' or 'root' entities this query should return.
-   *
-   * @see Query#findCount()
-   * @see Query#findFutureCount()
-   */
-  <T> int findCount(Query<T> query, Transaction transaction);
-
-  /**
-   * Return the Id values of the query as a List.
-   *
-   * @see Query#findIds()
-   */
-  @Nonnull
-  <A, T> List<A> findIds(Query<T> query, Transaction transaction);
-
-  /**
-   * Return a QueryIterator for the query.
+   * Return the extended API for EbeanServer.
    * <p>
-   * Generally using {@link #findEach(Query, Consumer, Transaction)} or
-   * {@link #findEachWhile(Query, Predicate, Transaction)} is preferred
-   * to findIterate(). The reason is that those methods automatically take care of
-   * closing the queryIterator (and the underlying jdbc statement and resultSet).
+   * The extended API has the options for executing queries that take an explicit
+   * transaction as an argument.
    * </p>
    * <p>
-   * This is similar to findEach in that not all the result beans need to be held
-   * in memory at the same time and as such is good for processing large queries.
-   * </p>
-   *
-   * @see Query#findIterate()
-   * @see Query#findEach(Consumer)
-   * @see Query#findEachWhile(Predicate)
-   */
-  @Nonnull
-  <T> QueryIterator<T> findIterate(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute the query visiting the each bean one at a time.
-   * <p>
-   * Unlike findList() this is suitable for processing a query that will return
-   * a very large resultSet. The reason is that not all the result beans need to be
-   * held in memory at the same time and instead processed one at a time.
-   * </p>
-   * <p>
-   * Internally this query using a PersistenceContext scoped to each bean (and the
-   * beans associated object graph).
-   * </p>
-   * <p>
-   * <pre>{@code
-   *
-   *     ebeanServer.find(Order.class)
-   *       .where().eq("status", Order.Status.NEW)
-   *       .order().asc("id")
-   *       .findEach((Order order) -> {
-   *
-   *         // do something with the order bean
-   *         System.out.println(" -- processing order ... " + order);
-   *       });
-   *
-   * }</pre>
-   *
-   * @see Query#findEach(Consumer)
-   * @see Query#findEachWhile(Predicate)
-   */
-  <T> void findEach(Query<T> query, Consumer<T> consumer, Transaction transaction);
-
-  /**
-   * Execute the query visiting the each bean one at a time.
-   * <p>
-   * Compared to findEach() this provides the ability to stop processing the query
-   * results early by returning false for the Predicate.
-   * </p>
-   * <p>
-   * Unlike findList() this is suitable for processing a query that will return
-   * a very large resultSet. The reason is that not all the result beans need to be
-   * held in memory at the same time and instead processed one at a time.
-   * </p>
-   * <p>
-   * Internally this query using a PersistenceContext scoped to each bean (and the
-   * beans associated object graph).
-   * </p>
-   * <p>
-   * <pre>{@code
-   *
-   *     ebeanServer.find(Order.class)
-   *       .where().eq("status", Order.Status.NEW)
-   *       .order().asc("id")
-   *       .findEachWhile((Order order) -> {
-   *
-   *         // do something with the order bean
-   *         System.out.println(" -- processing order ... " + order);
-   *
-   *         boolean carryOnProcessing = ...
-   *         return carryOnProcessing;
-   *       });
-   *
-   * }</pre>
-   *
-   * @see Query#findEach(Consumer)
-   * @see Query#findEachWhile(Predicate)
-   */
-  <T> void findEachWhile(Query<T> query, Predicate<T> consumer, Transaction transaction);
-
-  /**
-   * Return versions of a @History entity bean.
-   * <p>
-   * Generally this query is expected to be a find by id or unique predicates query.
-   * It will execute the query against the history returning the versions of the bean.
+   * Typically we only need to use the extended API when we do NOT want to use the
+   * usual ThreadLocal based mechanism to obtain the current transaction but instead
+   * supply the transaction explicitly.
    * </p>
    */
-  @Nonnull
-  <T> List<Version<T>> findVersions(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute a query returning a list of beans.
-   * <p>
-   * Generally you are able to use {@link Query#findList()} rather than
-   * explicitly calling this method. You could use this method if you wish to
-   * explicitly control the transaction used for the query.
-   * </p>
-   * <p>
-   * <pre>{@code
-   *
-   * List<Customer> customers =
-   *     ebeanServer.find(Customer.class)
-   *     .where().ilike("name", "rob%")
-   *     .findList();
-   *
-   * }</pre>
-   *
-   * @param <T>         the type of entity bean to fetch.
-   * @param query       the query to execute.
-   * @param transaction the transaction to use (can be null).
-   * @return the list of fetched beans.
-   * @see Query#findList()
-   */
-  @Nonnull
-  <T> List<T> findList(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute find row count query in a background thread.
-   * <p>
-   * This returns a Future object which can be used to cancel, check the
-   * execution status (isDone etc) and get the value (with or without a
-   * timeout).
-   * </p>
-   *
-   * @param query       the query to execute the row count on
-   * @param transaction the transaction (can be null).
-   * @return a Future object for the row count query
-   * @see Query#findFutureCount()
-   */
-  @Nonnull
-  <T> FutureRowCount<T> findFutureCount(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute find Id's query in a background thread.
-   * <p>
-   * This returns a Future object which can be used to cancel, check the
-   * execution status (isDone etc) and get the value (with or without a
-   * timeout).
-   * </p>
-   *
-   * @param query       the query to execute the fetch Id's on
-   * @param transaction the transaction (can be null).
-   * @return a Future object for the list of Id's
-   * @see Query#findFutureIds()
-   */
-  @Nonnull
-  <T> FutureIds<T> findFutureIds(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute find list query in a background thread returning a FutureList object.
-   * <p>
-   * This returns a Future object which can be used to cancel, check the
-   * execution status (isDone etc) and get the value (with or without a timeout).
-   * <p>
-   * This query will execute in it's own PersistenceContext and using its own transaction.
-   * What that means is that it will not share any bean instances with other queries.
-   *
-   * @param query       the query to execute in the background
-   * @param transaction the transaction (can be null).
-   * @return a Future object for the list result of the query
-   * @see Query#findFutureList()
-   */
-  @Nonnull
-  <T> FutureList<T> findFutureList(Query<T> query, Transaction transaction);
-
-  /**
-   * Return a PagedList for this query using firstRow and maxRows.
-   * <p>
-   * The benefit of using this over findList() is that it provides functionality to get the
-   * total row count etc.
-   * </p>
-   * <p>
-   * If maxRows is not set on the query prior to calling findPagedList() then a
-   * PersistenceException is thrown.
-   * </p>
-   * <p>
-   * <pre>{@code
-   *
-   *  PagedList<Order> pagedList = Ebean.find(Order.class)
-   *       .setFirstRow(50)
-   *       .setMaxRows(20)
-   *       .findPagedList();
-   *
-   *       // fetch the total row count in the background
-   *       pagedList.loadRowCount();
-   *
-   *       List<Order> orders = pagedList.getList();
-   *       int totalRowCount = pagedList.getTotalRowCount();
-   *
-   * }</pre>
-   *
-   * @return The PagedList
-   * @see Query#findPagedList()
-   */
-  @Nonnull
-  <T> PagedList<T> findPagedList(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute the query returning a set of entity beans.
-   * <p>
-   * Generally you are able to use {@link Query#findSet()} rather than
-   * explicitly calling this method. You could use this method if you wish to
-   * explicitly control the transaction used for the query.
-   * </p>
-   * <p>
-   * <pre>{@code
-   *
-   * Set<Customer> customers =
-   *     ebeanServer.find(Customer.class)
-   *     .where().ilike("name", "rob%")
-   *     .findSet();
-   *
-   * }</pre>
-   *
-   * @param <T>         the type of entity bean to fetch.
-   * @param query       the query to execute
-   * @param transaction the transaction to use (can be null).
-   * @return the set of fetched beans.
-   * @see Query#findSet()
-   */
-  @Nonnull
-  <T> Set<T> findSet(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute the query returning the entity beans in a Map.
-   * <p>
-   * Generally you are able to use {@link Query#findMap()} rather than
-   * explicitly calling this method. You could use this method if you wish to
-   * explicitly control the transaction used for the query.
-   * </p>
-   *
-   * @param <T>         the type of entity bean to fetch.
-   * @param query       the query to execute.
-   * @param transaction the transaction to use (can be null).
-   * @return the map of fetched beans.
-   * @see Query#findMap()
-   */
-  @Nonnull
-  <K, T> Map<K, T> findMap(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute the query returning a list of values for a single property.
-   * <p>
-   * <h3>Example 1:</h3>
-   * <pre>{@code
-   *
-   *  List<String> names =
-   *    Ebean.find(Customer.class)
-   *      .select("name")
-   *      .orderBy().asc("name")
-   *      .findSingleAttributeList();
-   *
-   * }</pre>
-   * <h3>Example 2:</h3>
-   * <pre>{@code
-   *
-   *  List<String> names =
-   *    Ebean.find(Customer.class)
-   *      .setDistinct(true)
-   *      .select("name")
-   *      .where().eq("status", Customer.Status.NEW)
-   *      .orderBy().asc("name")
-   *      .setMaxRows(100)
-   *      .findSingleAttributeList();
-   *
-   * }</pre>
-   *
-   * @return the list of values for the selected property
-   * @see Query#findSingleAttributeList()
-   */
-  @Nonnull
-  <A, T> List<A> findSingleAttributeList(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute the query returning at most one entity bean or null (if no matching
-   * bean is found).
-   * <p>
-   * This will throw a NonUniqueResultException if the query finds more than one result.
-   * </p>
-   * <p>
-   * Generally you are able to use {@link Query#findOne()} rather than
-   * explicitly calling this method. You could use this method if you wish to
-   * explicitly control the transaction used for the query.
-   * </p>
-   *
-   * @param <T>         the type of entity bean to fetch.
-   * @param query       the query to execute.
-   * @param transaction the transaction to use (can be null).
-   * @return the list of fetched beans.
-   * @throws NonUniqueResultException if more than one result was found
-   * @see Query#findOne()
-   */
-  @Nullable
-  <T> T findOne(Query<T> query, Transaction transaction);
-
-  /**
-   * Similar to findOne() but returns an Optional (rather than nullable).
-   */
-  @Nonnull
-  <T> Optional<T> findOneOrEmpty(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute as a delete query deleting the 'root level' beans that match the predicates
-   * in the query.
-   * <p>
-   * Note that if the query includes joins then the generated delete statement may not be
-   * optimal depending on the database platform.
-   * </p>
-   *
-   * @param query       the query used for the delete
-   * @param transaction the transaction to use (can be null)
-   * @param <T>         the type of entity bean to fetch.
-   * @return the number of beans/rows that were deleted
-   */
-  <T> int delete(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute the update query returning the number of rows updated.
-   * <p>
-   * The update query must be created using {@link #update(Class)}.
-   * </p>
-   *
-   * @param query       the update query to execute
-   * @param transaction the optional transaction to use for the update (can be null)
-   * @param <T>         the type of entity bean
-   * @return The number of rows updated
-   */
-  <T> int update(Query<T> query, Transaction transaction);
-
-  /**
-   * Execute the sql query returning a list of MapBean.
-   * <p>
-   * Generally you are able to use {@link SqlQuery#findList()} rather than
-   * explicitly calling this method. You could use this method if you wish to
-   * explicitly control the transaction used for the query.
-   * </p>
-   *
-   * @param query       the query to execute.
-   * @param transaction the transaction to use (can be null).
-   * @return the list of fetched MapBean.
-   * @see SqlQuery#findList()
-   */
-  @Nonnull
-  List<SqlRow> findList(SqlQuery query, Transaction transaction);
-
-  /**
-   * Execute the SqlQuery iterating a row at a time.
-   * <p>
-   * This streaming type query is useful for large query execution as only 1 row needs to be held in memory.
-   * </p>
-   */
-  void findEach(SqlQuery query, Consumer<SqlRow> consumer, Transaction transaction);
-
-  /**
-   * Execute the SqlQuery iterating a row at a time with the ability to stop consuming part way through.
-   * <p>
-   * Returning false after processing a row stops the iteration through the query results.
-   * </p>
-   * <p>
-   * This streaming type query is useful for large query execution as only 1 row needs to be held in memory.
-   * </p>
-   */
-  void findEachWhile(SqlQuery query, Predicate<SqlRow> consumer, Transaction transaction);
-
-  /**
-   * Execute the sql query returning a single MapBean or null.
-   * <p>
-   * This will throw a PersistenceException if the query found more than one
-   * result.
-   * </p>
-   * <p>
-   * Generally you are able to use {@link SqlQuery#findOne()} rather than
-   * explicitly calling this method. You could use this method if you wish to
-   * explicitly control the transaction used for the query.
-   * </p>
-   *
-   * @param query       the query to execute.
-   * @param transaction the transaction to use (can be null).
-   * @return the fetched MapBean or null if none was found.
-   * @see SqlQuery#findOne()
-   */
-  @Nullable
-  SqlRow findOne(SqlQuery query, Transaction transaction);
+  ExtendedServer extended();
 
   /**
    * Either Insert or Update the bean depending on its state.
@@ -1461,6 +1094,61 @@ public interface EbeanServer {
    */
   int saveAll(Collection<?> beans, Transaction transaction) throws OptimisticLockException;
 
+  /**
+   * This method checks the uniqueness of a bean. I.e. if the save will work. It will return the
+   * properties that violates an unique / primary key. This may be done in an UI save action to
+   * validate if the user has entered correct values.
+   * <p>
+   * Note: This method queries the DB for uniqueness of all indices, so do not use it in a batch update.
+   * <p>
+   * Note: This checks only the root bean!
+   * <p>
+   * <pre>{@code
+   *
+   *   // there is a unique constraint on title
+   *
+   *   Document doc = new Document();
+   *   doc.setTitle("One flew over the cuckoo's nest");
+   *   doc.setBody("clashes with doc1");
+   *
+   *   Set<Property> properties = server().checkUniqueness(doc);
+   *
+   *   if (properties.isEmpty()) {
+   *     // it is unique ... carry on
+   *
+   *   } else {
+   *     // build a user friendly message
+   *     // to return message back to user
+   *
+   *     String uniqueProperties = properties.toString();
+   *
+   *     StringBuilder msg = new StringBuilder();
+   *
+   *     properties.forEach((it)-> {
+   *       Object propertyValue = it.getVal(doc);
+   *       String propertyName = it.getName();
+   *       msg.append(" property["+propertyName+"] value["+propertyValue+"]");
+   *     });
+   *
+   *     // uniqueProperties > [title]
+   *     //       custom msg > property[title] value[One flew over the cuckoo's nest]
+   *
+   *  }
+   *
+   * }</pre>
+   *
+   * @param bean The entity bean to check uniqueness on
+   * @return a set of Properties if constraint validation was detected or empty list.
+   */
+  @Nonnull
+  Set<Property> checkUniqueness(Object bean);
+
+  /**
+   * Same as {@link #checkUniqueness(Object)}. but with given transaction.
+   */
+  @Nonnull
+  Set<Property> checkUniqueness(Object bean, Transaction transaction);
+
   /**
    * Marks the entity bean as dirty.
    * <p>
@@ -1547,6 +1235,29 @@ public interface EbeanServer {
    */
   void updateAll(Collection<?> beans, Transaction transaction) throws OptimisticLockException;
 
+  /**
+   * Merge the bean using the default merge options (no paths specified, default delete).
+   *
+   * @param bean The bean to merge
+   */
+  void merge(Object bean);
+
+  /**
+   * Merge the bean using the given merge options.
+   *
+   * @param bean    The bean to merge
+   * @param options The options to control the merge
+   */
+  void merge(Object bean, MergeOptions options);
+
+  /**
+   * Merge the bean using the given merge options and a transaction.
+   *
+   * @param bean    The bean to merge
+   * @param options The options to control the merge
+   */
+  void merge(Object bean, MergeOptions options, Transaction transaction);
+
   /**
    * Insert the bean.
    * <p>

src/main/java/io/ebean/EbeanVersion.java

@@ -1,11 +1,11 @@
 package io.ebean;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.Properties;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 /**
  * Class to determine the ebean version. (
  * @author Roland Praml, FOCONIS AG
@@ -13,31 +13,32 @@ import org.slf4j.LoggerFactory;
  */
 public class EbeanVersion {
   private EbeanVersion() {
-    
+
   }
   private static final Logger logger = LoggerFactory.getLogger(EbeanVersion.class);
-  
+
   private static String version = "unknown";
   static {
     try {
       Properties prop = new Properties();
-      InputStream in = Ebean.class.getResourceAsStream("/META-INF/maven/io.ebean/ebean/pom.properties");
-      if (in != null) {
-        prop.load(in);
-        in.close();
-        version = prop.getProperty("version");
+      try (InputStream in = Ebean.class.getResourceAsStream("/META-INF/maven/io.ebean/ebean/pom.properties")) {
+        if (in != null) {
+          prop.load(in);
+          in.close();
+          version = prop.getProperty("version");
+        }
       }
       logger.info("ebean version: {}", version);
     } catch (IOException e) {
       logger.warn("Could not determine ebean version: {}", e.getMessage());
     }
   }
-  
+
   /**
    * Returns the ebean version (read from /META-INF/maven/io.ebean/ebean/pom.properties)
    */
   public static String getVersion() {
     return version;
   }
-  
+
 }

src/main/java/io/ebean/ExpressionFactory.java

@@ -327,6 +327,30 @@ public interface ExpressionFactory {
    */
   Expression allEq(Map<String, Object> propertyMap);
 
+  /**
+   * Add expression for ANY of the given bit flags to be set.
+   *
+   * @param propertyName The property that holds the flags value
+   * @param flags        The flags we are looking for
+   */
+  Expression bitwiseAny(String propertyName, long flags);
+
+  /**
+   * Add expression for ALL of the given bit flags to be set.
+   *
+   * @param propertyName The property that holds the flags value
+   * @param flags        The flags we are looking for
+   */
+  Expression bitwiseAll(String propertyName, long flags);
+
+  /**
+   * Add bitwise AND expression of the given bit flags to compare with the match/mask.
+   *
+   * @param propertyName The property that holds the flags value
+   * @param flags        The flags we are looking for
+   */
+  Expression bitwiseAnd(String propertyName, long flags, long match);
+
   /**
    * Add raw expression with a single parameter.
    * <p>

src/main/java/io/ebean/ExpressionList.java

@@ -120,6 +120,14 @@ public interface ExpressionList<T> {
    */
   Query<T> asDraft();
 
+  /**
+   * Convert the query to a DTO bean query.
+   * <p>
+   * We effectively use the underlying ORM query to build the SQL and then execute
+   * and map it into DTO beans.
+   */
+  <D> DtoQuery<D> asDto(Class<D> dtoClass);
+
   /**
    * Execute using "for update" clause which results in the DB locking the record.
    */
@@ -404,6 +412,11 @@ public interface ExpressionList<T> {
    */
   Query<T> select(String properties);
 
+  /**
+   * Apply the fetchGroup which defines what part of the object graph to load.
+   */
+  Query<T> select(FetchGroup<T> fetchGroup);
+
   /**
    * Set whether this query uses DISTINCT.
    * <p>
@@ -480,6 +493,36 @@ public interface ExpressionList<T> {
    */
   Query<T> setUseQueryCache(CacheMode useCache);
 
+  /**
+   * Extended version for setDistinct in conjunction with "findSingleAttributeList";
+   * <p>
+   * <pre>{@code
+   *
+   *  List<CountedValue<Order.Status>> orderStatusCount =
+   *
+   *     Ebean.find(Order.class)
+   *      .select("status")
+   *      .where()
+   *      .gt("orderDate", LocalDate.now().minusMonths(3))
+   *
+   *      // fetch as single attribute with a COUNT
+   *      .setCountDistinct(CountDistinctOrder.COUNT_DESC_ATTR_ASC)
+   *      .findSingleAttributeList();
+   *
+   *     for (CountedValue<Order.Status> entry : orderStatusCount) {
+   *       System.out.println(" count:" + entry.getCount()+" orderStatus:" + entry.getValue() );
+   *     }
+   *
+   *   // produces
+   *
+   *   count:3 orderStatus:NEW
+   *   count:1 orderStatus:SHIPPED
+   *   count:1 orderStatus:COMPLETE
+   *
+   * }</pre>
+   */
+  Query<T> setCountDistinct(CountDistinctOrder orderBy);
+
   /**
    * Calls {@link #setUseQueryCache(CacheMode)} with <code>ON</code> or <code>OFF</code>.
    *
@@ -515,6 +558,11 @@ public interface ExpressionList<T> {
    */
   Query<T> setDisableReadAuditing();
 
+  /**
+   * Set a label on the query (to help identify query execution statistics).
+   */
+  Query<T> setLabel(String label);
+
   /**
    * Add expressions to the having clause.
    * <p>
@@ -843,7 +891,7 @@ public interface ExpressionList<T> {
 
   /**
    * In - using a subQuery.
-   *
+   * <p>
    * This is exactly the same as in() and provided due to "in" being a Kotlin keyword
    * (and hence to avoid the slightly ugly escaping when using in() in Kotlin)
    */
@@ -853,7 +901,7 @@ public interface ExpressionList<T> {
 
   /**
    * In - property has a value in the array of values.
-   *
+   * <p>
    * This is exactly the same as in() and provided due to "in" being a Kotlin keyword
    * (and hence to avoid the slightly ugly escaping when using in() in Kotlin)
    */
@@ -863,7 +911,7 @@ public interface ExpressionList<T> {
 
   /**
    * In - property has a value in the collection of values.
-   *
+   * <p>
    * This is exactly the same as in() and provided due to "in" being a Kotlin keyword
    * (and hence to avoid the slightly ugly escaping when using in() in Kotlin)
    */
@@ -961,6 +1009,67 @@ public interface ExpressionList<T> {
    */
   ExpressionList<T> arrayIsNotEmpty(String propertyName);
 
+  /**
+   * Add expression for ANY of the given bit flags to be set.
+   * <pre>{@code
+   *
+   * where().bitwiseAny("flags", BwFlags.HAS_BULK + BwFlags.HAS_COLOUR)
+   *
+   * }</pre>
+   *
+   * @param propertyName The property that holds the flags value
+   * @param flags        The flags we are looking for
+   */
+  ExpressionList<T> bitwiseAny(String propertyName, long flags);
+
+  /**
+   * Add expression for ALL of the given bit flags to be set.
+   * <p>
+   * <pre>{@code
+   *
+   * where().bitwiseAll("flags", BwFlags.HAS_BULK + BwFlags.HAS_COLOUR)
+   *
+   * }</pre>
+   *
+   * @param propertyName The property that holds the flags value
+   * @param flags        The flags we are looking for
+   */
+  ExpressionList<T> bitwiseAll(String propertyName, long flags);
+
+  /**
+   * Add expression for the given bit flags to be NOT set.
+   * <p>
+   * <pre>{@code
+   *
+   * where().bitwiseNot("flags", BwFlags.HAS_COLOUR)
+   *
+   * }</pre>
+   *
+   * @param propertyName The property that holds the flags value
+   * @param flags        The flags we are looking for
+   */
+  ExpressionList<T> bitwiseNot(String propertyName, long flags);
+
+  /**
+   * Add bitwise AND expression of the given bit flags to compare with the match/mask.
+   * <p>
+   * <pre>{@code
+   *
+   * // Flags Bulk + Size = Size
+   * // ... meaning Bulk is not set and Size is set
+   *
+   * long selectedFlags = BwFlags.HAS_BULK + BwFlags.HAS_SIZE;
+   * long mask = BwFlags.HAS_SIZE; // Only Size flag set
+   *
+   * where().bitwiseAnd("flags", selectedFlags, mask)
+   *
+   * }</pre>
+   *
+   * @param propertyName The property that holds the flags value
+   * @param flags        The flags we are looking for
+   */
+  ExpressionList<T> bitwiseAnd(String propertyName, long flags, long match);
+
   /**
    * Add raw expression with a single parameter.
    * <p>

src/main/java/io/ebean/ExtendedServer.java

@@ -0,0 +1,452 @@
+package io.ebean;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import javax.persistence.NonUniqueResultException;
+import java.time.Clock;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.function.Predicate;
+
+/**
+ * The extended API for EbeanServer.
+ * <p>
+ * This provides the finder methods that take an explicit transaction rather than obtaining
+ * the transaction from the usual mechanism (which is ThreadLocal based).
+ * </p>
+ * <p>
+ * In general we only want to use this ExtendedServer API when we want to avoid / bypass
+ * the use of the mechanism to get the current transaction and instead explicitly supply
+ * the transaction to use.
+ * </p>
+ * <p>
+ * Note that in all cases the transaction supplied can be null and in this case the EbeanServer
+ * will use the normal mechanism to obtain the transaction to use.
+ * </p>
+ */
+public interface ExtendedServer {
+
+  /**
+   * Return the NOW time from the Clock.
+   */
+  long clockNow();
+
+  /**
+   * Set the Clock to use for <code>@WhenCreated</code> and <code>@WhenModified</code>.
+   * <p>
+   * Note that we only expect to change the Clock for testing purposes.
+   * </p>
+   */
+  void setClock(Clock clock);
+
+  /**
+   * Return the number of 'top level' or 'root' entities this query should return.
+   *
+   * @see Query#findCount()
+   * @see Query#findFutureCount()
+   */
+  <T> int findCount(Query<T> query, Transaction transaction);
+
+  /**
+   * Return the Id values of the query as a List.
+   *
+   * @see Query#findIds()
+   */
+  @Nonnull
+  <A, T> List<A> findIds(Query<T> query, Transaction transaction);
+
+  /**
+   * Return a QueryIterator for the query.
+   * <p>
+   * Generally using {@link #findEach(Query, Consumer, Transaction)} or
+   * {@link #findEachWhile(Query, Predicate, Transaction)} is preferred
+   * to findIterate(). The reason is that those methods automatically take care of
+   * closing the queryIterator (and the underlying jdbc statement and resultSet).
+   * </p>
+   * <p>
+   * This is similar to findEach in that not all the result beans need to be held
+   * in memory at the same time and as such is good for processing large queries.
+   * </p>
+   *
+   * @see Query#findIterate()
+   * @see Query#findEach(Consumer)
+   * @see Query#findEachWhile(Predicate)
+   */
+  @Nonnull
+  <T> QueryIterator<T> findIterate(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute the query visiting the each bean one at a time.
+   * <p>
+   * Unlike findList() this is suitable for processing a query that will return
+   * a very large resultSet. The reason is that not all the result beans need to be
+   * held in memory at the same time and instead processed one at a time.
+   * </p>
+   * <p>
+   * Internally this query using a PersistenceContext scoped to each bean (and the
+   * beans associated object graph).
+   * </p>
+   * <p>
+   * <pre>{@code
+   *
+   *     ebeanServer.find(Order.class)
+   *       .where().eq("status", Order.Status.NEW)
+   *       .order().asc("id")
+   *       .findEach((Order order) -> {
+   *
+   *         // do something with the order bean
+   *         System.out.println(" -- processing order ... " + order);
+   *       });
+   *
+   * }</pre>
+   *
+   * @see Query#findEach(Consumer)
+   * @see Query#findEachWhile(Predicate)
+   */
+  <T> void findEach(Query<T> query, Consumer<T> consumer, Transaction transaction);
+
+  /**
+   * Execute the query visiting the each bean one at a time.
+   * <p>
+   * Compared to findEach() this provides the ability to stop processing the query
+   * results early by returning false for the Predicate.
+   * </p>
+   * <p>
+   * Unlike findList() this is suitable for processing a query that will return
+   * a very large resultSet. The reason is that not all the result beans need to be
+   * held in memory at the same time and instead processed one at a time.
+   * </p>
+   * <p>
+   * Internally this query using a PersistenceContext scoped to each bean (and the
+   * beans associated object graph).
+   * </p>
+   * <p>
+   * <pre>{@code
+   *
+   *     ebeanServer.find(Order.class)
+   *       .where().eq("status", Order.Status.NEW)
+   *       .order().asc("id")
+   *       .findEachWhile((Order order) -> {
+   *
+   *         // do something with the order bean
+   *         System.out.println(" -- processing order ... " + order);
+   *
+   *         boolean carryOnProcessing = ...
+   *         return carryOnProcessing;
+   *       });
+   *
+   * }</pre>
+   *
+   * @see Query#findEach(Consumer)
+   * @see Query#findEachWhile(Predicate)
+   */
+  <T> void findEachWhile(Query<T> query, Predicate<T> consumer, Transaction transaction);
+
+  /**
+   * Return versions of a @History entity bean.
+   * <p>
+   * Generally this query is expected to be a find by id or unique predicates query.
+   * It will execute the query against the history returning the versions of the bean.
+   * </p>
+   */
+  @Nonnull
+  <T> List<Version<T>> findVersions(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute a query returning a list of beans.
+   * <p>
+   * Generally you are able to use {@link Query#findList()} rather than
+   * explicitly calling this method. You could use this method if you wish to
+   * explicitly control the transaction used for the query.
+   * </p>
+   * <p>
+   * <pre>{@code
+   *
+   * List<Customer> customers =
+   *     ebeanServer.find(Customer.class)
+   *     .where().ilike("name", "rob%")
+   *     .findList();
+   *
+   * }</pre>
+   *
+   * @param <T>         the type of entity bean to fetch.
+   * @param query       the query to execute.
+   * @param transaction the transaction to use (can be null).
+   * @return the list of fetched beans.
+   * @see Query#findList()
+   */
+  @Nonnull
+  <T> List<T> findList(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute find row count query in a background thread.
+   * <p>
+   * This returns a Future object which can be used to cancel, check the
+   * execution status (isDone etc) and get the value (with or without a
+   * timeout).
+   * </p>
+   *
+   * @param query       the query to execute the row count on
+   * @param transaction the transaction (can be null).
+   * @return a Future object for the row count query
+   * @see Query#findFutureCount()
+   */
+  @Nonnull
+  <T> FutureRowCount<T> findFutureCount(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute find Id's query in a background thread.
+   * <p>
+   * This returns a Future object which can be used to cancel, check the
+   * execution status (isDone etc) and get the value (with or without a
+   * timeout).
+   * </p>
+   *
+   * @param query       the query to execute the fetch Id's on
+   * @param transaction the transaction (can be null).
+   * @return a Future object for the list of Id's
+   * @see Query#findFutureIds()
+   */
+  @Nonnull
+  <T> FutureIds<T> findFutureIds(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute find list query in a background thread returning a FutureList object.
+   * <p>
+   * This returns a Future object which can be used to cancel, check the
+   * execution status (isDone etc) and get the value (with or without a timeout).
+   * <p>
+   * This query will execute in it's own PersistenceContext and using its own transaction.
+   * What that means is that it will not share any bean instances with other queries.
+   *
+   * @param query       the query to execute in the background
+   * @param transaction the transaction (can be null).
+   * @return a Future object for the list result of the query
+   * @see Query#findFutureList()
+   */
+  @Nonnull
+  <T> FutureList<T> findFutureList(Query<T> query, Transaction transaction);
+
+  /**
+   * Return a PagedList for this query using firstRow and maxRows.
+   * <p>
+   * The benefit of using this over findList() is that it provides functionality to get the
+   * total row count etc.
+   * </p>
+   * <p>
+   * If maxRows is not set on the query prior to calling findPagedList() then a
+   * PersistenceException is thrown.
+   * </p>
+   * <p>
+   * <pre>{@code
+   *
+   *  PagedList<Order> pagedList = Ebean.find(Order.class)
+   *       .setFirstRow(50)
+   *       .setMaxRows(20)
+   *       .findPagedList();
+   *
+   *       // fetch the total row count in the background
+   *       pagedList.loadRowCount();
+   *
+   *       List<Order> orders = pagedList.getList();
+   *       int totalRowCount = pagedList.getTotalRowCount();
+   *
+   * }</pre>
+   *
+   * @return The PagedList
+   * @see Query#findPagedList()
+   */
+  @Nonnull
+  <T> PagedList<T> findPagedList(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute the query returning a set of entity beans.
+   * <p>
+   * Generally you are able to use {@link Query#findSet()} rather than
+   * explicitly calling this method. You could use this method if you wish to
+   * explicitly control the transaction used for the query.
+   * </p>
+   * <p>
+   * <pre>{@code
+   *
+   * Set<Customer> customers =
+   *     ebeanServer.find(Customer.class)
+   *     .where().ilike("name", "rob%")
+   *     .findSet();
+   *
+   * }</pre>
+   *
+   * @param <T>         the type of entity bean to fetch.
+   * @param query       the query to execute
+   * @param transaction the transaction to use (can be null).
+   * @return the set of fetched beans.
+   * @see Query#findSet()
+   */
+  @Nonnull
+  <T> Set<T> findSet(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute the query returning the entity beans in a Map.
+   * <p>
+   * Generally you are able to use {@link Query#findMap()} rather than
+   * explicitly calling this method. You could use this method if you wish to
+   * explicitly control the transaction used for the query.
+   * </p>
+   *
+   * @param <T>         the type of entity bean to fetch.
+   * @param query       the query to execute.
+   * @param transaction the transaction to use (can be null).
+   * @return the map of fetched beans.
+   * @see Query#findMap()
+   */
+  @Nonnull
+  <K, T> Map<K, T> findMap(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute the query returning a list of values for a single property.
+   * <p>
+   * <h3>Example 1:</h3>
+   * <pre>{@code
+   *
+   *  List<String> names =
+   *    Ebean.find(Customer.class)
+   *      .select("name")
+   *      .orderBy().asc("name")
+   *      .findSingleAttributeList();
+   *
+   * }</pre>
+   * <h3>Example 2:</h3>
+   * <pre>{@code
+   *
+   *  List<String> names =
+   *    Ebean.find(Customer.class)
+   *      .setDistinct(true)
+   *      .select("name")
+   *      .where().eq("status", Customer.Status.NEW)
+   *      .orderBy().asc("name")
+   *      .setMaxRows(100)
+   *      .findSingleAttributeList();
+   *
+   * }</pre>
+   *
+   * @return the list of values for the selected property
+   * @see Query#findSingleAttributeList()
+   */
+  @Nonnull
+  <A, T> List<A> findSingleAttributeList(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute the query returning at most one entity bean or null (if no matching
+   * bean is found).
+   * <p>
+   * This will throw a NonUniqueResultException if the query finds more than one result.
+   * </p>
+   * <p>
+   * Generally you are able to use {@link Query#findOne()} rather than
+   * explicitly calling this method. You could use this method if you wish to
+   * explicitly control the transaction used for the query.
+   * </p>
+   *
+   * @param <T>         the type of entity bean to fetch.
+   * @param query       the query to execute.
+   * @param transaction the transaction to use (can be null).
+   * @return the list of fetched beans.
+   * @throws NonUniqueResultException if more than one result was found
+   * @see Query#findOne()
+   */
+  @Nullable
+  <T> T findOne(Query<T> query, Transaction transaction);
+
+  /**
+   * Similar to findOne() but returns an Optional (rather than nullable).
+   */
+  @Nonnull
+  <T> Optional<T> findOneOrEmpty(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute as a delete query deleting the 'root level' beans that match the predicates
+   * in the query.
+   * <p>
+   * Note that if the query includes joins then the generated delete statement may not be
+   * optimal depending on the database platform.
+   * </p>
+   *
+   * @param query       the query used for the delete
+   * @param transaction the transaction to use (can be null)
+   * @param <T>         the type of entity bean to fetch.
+   * @return the number of beans/rows that were deleted
+   */
+  <T> int delete(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute the update query returning the number of rows updated.
+   * <p>
+   * The update query must be created using {@link EbeanServer#update(Class)}.
+   * </p>
+   *
+   * @param query       the update query to execute
+   * @param transaction the optional transaction to use for the update (can be null)
+   * @param <T>         the type of entity bean
+   * @return The number of rows updated
+   */
+  <T> int update(Query<T> query, Transaction transaction);
+
+  /**
+   * Execute the sql query returning a list of MapBean.
+   * <p>
+   * Generally you are able to use {@link SqlQuery#findList()} rather than
+   * explicitly calling this method. You could use this method if you wish to
+   * explicitly control the transaction used for the query.
+   * </p>
+   *
+   * @param query       the query to execute.
+   * @param transaction the transaction to use (can be null).
+   * @return the list of fetched MapBean.
+   * @see SqlQuery#findList()
+   */
+  @Nonnull
+  List<SqlRow> findList(SqlQuery query, Transaction transaction);
+
+  /**
+   * Execute the SqlQuery iterating a row at a time.
+   * <p>
+   * This streaming type query is useful for large query execution as only 1 row needs to be held in memory.
+   * </p>
+   */
+  void findEach(SqlQuery query, Consumer<SqlRow> consumer, Transaction transaction);
+
+  /**
+   * Execute the SqlQuery iterating a row at a time with the ability to stop consuming part way through.
+   * <p>
+   * Returning false after processing a row stops the iteration through the query results.
+   * </p>
+   * <p>
+   * This streaming type query is useful for large query execution as only 1 row needs to be held in memory.
+   * </p>
+   */
+  void findEachWhile(SqlQuery query, Predicate<SqlRow> consumer, Transaction transaction);
+
+  /**
+   * Execute the sql query returning a single MapBean or null.
+   * <p>
+   * This will throw a PersistenceException if the query found more than one
+   * result.
+   * </p>
+   * <p>
+   * Generally you are able to use {@link SqlQuery#findOne()} rather than
+   * explicitly calling this method. You could use this method if you wish to
+   * explicitly control the transaction used for the query.
+   * </p>
+   *
+   * @param query       the query to execute.
+   * @param transaction the transaction to use (can be null).
+   * @return the fetched MapBean or null if none was found.
+   * @see SqlQuery#findOne()
+   */
+  @Nullable
+  SqlRow findOne(SqlQuery query, Transaction transaction);
+
+}

src/main/java/io/ebean/FetchGroup.java

@@ -0,0 +1,114 @@
+package io.ebean;
+
+import javax.annotation.Nonnull;
+
+/**
+ * Defines what part of the object graph to load (select and fetch clauses).
+ * <p>
+ * Using a FetchGroup effectively sets the select() and fetch() clauses for a query. It is alternative
+ * to specifying the select() and fetch() clauses on the query allowing for more re-use of "what to load"
+ * that can be defined separately from the query and combined with other FetchGroups.
+ * </p>
+ *
+ * <h3>Select example</h3>*
+ * <pre>{@code
+ *
+ * FetchGroup<Customer> fetchGroup = FetchGroup.of(Customer.class, "name, status");
+ *
+ * Customer.query()
+ *   .select(fetchGroup)
+ *   .findList();
+ *
+ * }</pre>
+ *
+ * <h3>Select and fetch example</h3>
+ * <pre>{@code
+ *
+ * FetchGroup<Customer> fetchGroup = FetchGroup.of(Customer.class)
+ *   .select("name, status")
+ *   .fetch("contacts", "firstName, lastName, email")
+ *   .build();
+ *
+ * Customer.query()
+ *   .select(fetchGroup)
+ *   .findList();
+ *
+ * }</pre>
+ *
+ * <h3>Combining FetchGroups</h3>
+ * <p>
+ *   FetchGroups can be combined together to form another FetchGroup.
+ * </p>
+ * <pre>{@code
+ *
+ *  FetchGroup<Address> FG_ADDRESS = FetchGroup.of(Address.class)
+ *    .select("line1, line2, city")
+ *    .fetch("country", "name")
+ *    .build();
+ *
+ *  FetchGroup<Customer> FG_CUSTOMER = FetchGroup.of(Customer.class)
+ *    .select("name, version")
+ *    .fetch("billingAddress", FG_ADDRESS)
+ *    .build();
+ *
+ *
+ *  Customer.query()
+ *    .select(FG_CUSTOMER)
+ *    .findList();
+ *
+ * }</pre>
+ *
+ * @param <T> The bean type the Fetch group can be applied to
+ */
+public interface FetchGroup<T> {
+
+  /**
+   * Return the FetchGroup with the given select clause.
+   * <p>
+   *   We use this for simple FetchGroup that only select() properties and do not have additional fetch() clause.
+   * </p>
+   * <pre>{@code
+   *
+   * FetchGroup<Customer> fetchGroup = FetchGroup.of(Customer.class, "name, status");
+   *
+   * Customer.query()
+   *   .select(fetchGroup)
+   *   .findList();
+   *
+   * }</pre>
+   *
+   * @param select The select clause of the FetchGroup
+   *
+   * @return The FetchGroup with the given select clause
+   */
+  @Nonnull
+  static <T> FetchGroup<T> of(Class<T> cls, String select) {
+    return XServiceProvider.fetchGroupOf(cls, select);
+  }
+
+  /**
+   * Return the FetchGroupBuilder with the given select clause that we can add fetch clauses to.
+   * <p>
+   * We chain select() with one or more fetch() clauses to define the object graph to load.
+   * </p>
+   * <pre>{@code
+   *
+   * FetchGroup<Customer> fetchGroup = FetchGroup.of(Customer.class)
+   *   .select("name, status")
+   *   .fetch("contacts", "firstName, lastName, email")
+   *   .build();
+   *
+   * Customer.query()
+   *   .select(fetchGroup)
+   *   .findList();
+   *
+   * }</pre>
+   *
+   * @return The FetchGroupBuilder with the given select clause which we will add fetch clauses to
+   */
+  @Nonnull
+  static <T> FetchGroupBuilder<T> of(Class<T> cls) {
+    return XServiceProvider.fetchGroupOf(cls);
+  }
+
+}

src/main/java/io/ebean/FetchGroupBuilder.java

@@ -0,0 +1,93 @@
+package io.ebean;
+
+import javax.annotation.Nonnull;
+
+/**
+ * Builds a FetchGroup by adding fetch clauses.
+ * <p>
+ * We add select() and fetch() clauses to define the object graph we want to load.
+ * </p>
+ *
+ * <pre>{@code
+ *
+ * FetchGroup fetchGroup = FetchGroup
+ *   .select("name, status")
+ *   .fetch("contacts", "firstName, lastName, email")
+ *   .build();
+ *
+ * Customer.query()
+ *   .select(fetchGroup)
+ *   .where()
+ *   ...
+ *   .findList();
+ *
+ * }</pre>
+ */
+public interface FetchGroupBuilder<T> {
+
+  /**
+   * Specify specific properties to select (top level properties).
+   */
+  @Nonnull
+  FetchGroupBuilder<T> select(String select);
+
+  /**
+   * Fetch all the properties at the given path.
+   */
+  @Nonnull
+  FetchGroupBuilder<T> fetch(String path);
+
+  /**
+   * Fetch the path with the nested fetch group.
+   */
+  @Nonnull
+  FetchGroupBuilder<T> fetch(String path, FetchGroup<?> nestedGroup);
+
+  /**
+   * Fetch the path using a query join with the nested fetch group.
+   */
+  @Nonnull
+  FetchGroupBuilder<T> fetchQuery(String path, FetchGroup<?> nestedGroup);
+
+  /**
+   * Fetch the path lazily with the nested fetch group.
+   */
+  @Nonnull
+  FetchGroupBuilder<T> fetchLazy(String path, FetchGroup<?> nestedGroup);
+
+  /**
+   * Fetch the path including specified properties.
+   */
+  @Nonnull
+  FetchGroupBuilder<T> fetch(String path, String properties);
+
+  /**
+   * Fetch the path including all its properties using a query join.
+   */
+  @Nonnull
+  FetchGroupBuilder<T> fetchQuery(String path);
+
+  /**
+   * Fetch the path including specified properties using a query join.
+   */
+  @Nonnull
+  FetchGroupBuilder<T> fetchQuery(String path, String properties);
+
+  /**
+   * Fetch the path including all its properties lazily.
+   */
+  @Nonnull
+  FetchGroupBuilder<T> fetchLazy(String path);
+
+  /**
+   * Fetch the path including specified properties lazily.
+   */
+  @Nonnull
+  FetchGroupBuilder<T> fetchLazy(String path, String properties);
+
+  /**
+   * Build and return the FetchGroup.
+   */
+  @Nonnull
+  FetchGroup<T> build();
+}

src/main/java/io/ebean/MergeOptions.java

@@ -0,0 +1,29 @@
+package io.ebean;
+
+import java.util.Set;
+
+/**
+ * Options used to control a merge. Use MergeOptionsBuilder to create an instance.
+ * <p>
+ * Instances of MergeOptions are thread safe and safe to share across threads.
+ */
+public interface MergeOptions {
+
+  /**
+   * Returns true if Id values are supplied by the client.
+   * <p>
+   * This would be the case when for example a mobile creates data in it's own local database
+   * and then sync's. In this case often the id values are UUID.
+   */
+  boolean isClientGeneratedIds();
+
+  /**
+   * Return true if delete permanent should be used and false for 'normal' delete that allows soft deletes.
+   */
+  boolean isDeletePermanent();
+
+  /**
+   * Return the paths included in the merge.
+   */
+  Set<String> paths();
+}

src/main/java/io/ebean/MergeOptionsBuilder.java

@@ -0,0 +1,95 @@
+package io.ebean;
+
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+/**
+ * Builds a MergeOptions which is immutable and thread safe.
+ */
+public class MergeOptionsBuilder {
+
+  private static final MOptions DEFAULT_OPTIONS = new MOptions();
+
+  private Set<String> paths = new LinkedHashSet<>();
+
+  private boolean clientGeneratedIds;
+
+  private boolean deletePermanent;
+
+  /**
+   * Return the default options.
+   */
+  public static MergeOptions defaultOptions() {
+    return DEFAULT_OPTIONS;
+  }
+
+  /**
+   * Add a path that will included in the merge.
+   *
+   * @param path The path relative to the root type.
+   * @return The builder to chain another addPath() or build().
+   */
+  public MergeOptionsBuilder addPath(String path) {
+    paths.add(path);
+    return this;
+  }
+
+  /**
+   * Set to true if Id values are supplied by the client.
+   * <p>
+   * This would be the case when for example a mobile creates data in it's own local database
+   * and then sync's. In this case often the id values are UUID.
+   */
+  public MergeOptionsBuilder setClientGeneratedIds() {
+    this.clientGeneratedIds = true;
+    return this;
+  }
+
+  /**
+   * Set that deletions should use delete permanent (rather than default which allows soft deletes).
+   */
+  public MergeOptionsBuilder setDeletePermanent() {
+    this.deletePermanent = true;
+    return this;
+  }
+
+  /**
+   * Build and return the MergeOptions instance.
+   */
+  public MergeOptions build() {
+    return new MOptions(paths, clientGeneratedIds, deletePermanent);
+  }
+
+  private static class MOptions implements MergeOptions {
+
+    private final boolean clientGeneratedIds;
+    private final boolean deletePermanent;
+    private final Set<String> paths;
+
+    private MOptions(){
+      this.clientGeneratedIds = false;
+      this.paths = new LinkedHashSet<>();
+      this.deletePermanent = false;
+    }
+
+    private MOptions(Set<String> paths, boolean clientGeneratedIds, boolean deletePermanent) {
+      this.paths = paths;
+      this.clientGeneratedIds = clientGeneratedIds;
+      this.deletePermanent = deletePermanent;
+    }
+
+    public Set<String> paths() {
+      return paths;
+    }
+
+    @Override
+    public boolean isClientGeneratedIds() {
+      return clientGeneratedIds;
+    }
+
+    @Override
+    public boolean isDeletePermanent() {
+      return deletePermanent;
+    }
+  }
+}

src/main/java/io/ebean/PrimaryServer.java

@@ -76,7 +76,6 @@ class PrimaryServer {
     if (defaultServerName == null) {
       defaultServerName = "db";
     }
-    System.setProperty("ebean_db", defaultServerName);
     return defaultServerName;
   }
 

src/main/java/io/ebean/Query.java

@@ -236,6 +236,14 @@ public interface Query<T> {
    */
   Query<T> asDraft();
 
+  /**
+   * Convert the query to a DTO bean query.
+   * <p>
+   * We effectively use the underlying ORM query to build the SQL and then execute
+   * and map it into DTO beans.
+   */
+  <D> DtoQuery<D> asDto(Class<D> dtoClass);
+
   /**
    * Cancel the query execution if supported by the underlying database and
    * driver.
@@ -389,6 +397,11 @@ public interface Query<T> {
    */
   Query<T> select(String fetchProperties);
 
+  /**
+   * Apply the fetchGroup which defines what part of the object graph to load.
+   */
+  Query<T> select(FetchGroup<T> fetchGroup);
+
   /**
    * Specify a path to fetch eagerly including specific properties.
    * <p>
@@ -594,8 +607,6 @@ public interface Query<T> {
    * <p>
    * This query will execute against the EbeanServer that was used to create it.
    * </p>
-   *
-   * @see EbeanServer#findIds(Query, Transaction)
    */
   @Nonnull
   <A> List<A> findIds();
@@ -732,8 +743,6 @@ public interface Query<T> {
    *     .findList();
    *
    * }</pre>
-   *
-   * @see EbeanServer#findList(Query, Transaction)
    */
   @Nonnull
   List<T> findList();
@@ -751,8 +760,6 @@ public interface Query<T> {
    *     .findSet();
    *
    * }</pre>
-   *
-   * @see EbeanServer#findSet(Query, Transaction)
    */
   @Nonnull
   Set<T> findSet();
@@ -774,8 +781,6 @@ public interface Query<T> {
    *     .findMap();
    *
    * }</pre>
-   *
-   * @see EbeanServer#findMap(Query, Transaction)
    */
   @Nonnull
   <K> Map<K, T> findMap();
@@ -828,6 +833,11 @@ public interface Query<T> {
    */
   <A> A findSingleAttribute();
 
+  /**
+   * Return true if this is countDistinct query.
+   */
+  boolean isCountDistinct();
+
   /**
    * Execute the query returning either a single bean or null (if no matching
    * bean is found).
@@ -1272,6 +1282,37 @@ public interface Query<T> {
    */
   Query<T> setDistinct(boolean isDistinct);
 
+  /**
+   * Extended version for setDistinct in conjunction with "findSingleAttributeList";
+   *
+   * <pre>{@code
+   *
+   *  List<CountedValue<Order.Status>> orderStatusCount =
+   *
+   *     Ebean.find(Order.class)
+   *      .select("status")
+   *      .where()
+   *      .gt("orderDate", LocalDate.now().minusMonths(3))
+   *
+   *      // fetch as single attribute with a COUNT
+   *      .setCountDistinct(CountDistinctOrder.COUNT_DESC_ATTR_ASC)
+   *      .findSingleAttributeList();
+   *
+   *     for (CountedValue<Order.Status> entry : orderStatusCount) {
+   *       System.out.println(" count:" + entry.getCount()+" orderStatus:" + entry.getValue() );
+   *     }
+   *
+   *   // produces
+   *
+   *   count:3 orderStatus:NEW
+   *   count:1 orderStatus:SHIPPED
+   *   count:1 orderStatus:COMPLETE
+   *
+   * }</pre>
+   *
+   */
+  Query<T> setCountDistinct(CountDistinctOrder orderBy);
+
   /**
    * Return the first row value.
    */
@@ -1375,6 +1416,15 @@ public interface Query<T> {
    */
   Query<T> setProfileLocation(ProfileLocation profileLocation);
 
+  /**
+   * Set a label on the query.
+   * <p>
+   * This label can be used to help identify query performance metrics but we can also use
+   * profile location enhancement on Finders so for some that would be a better option.
+   * </p>
+   */
+  Query<T> setLabel(String label);
+
   /**
    * Set to true if this query should execute against the doc store.
    * <p>

src/main/java/io/ebean/RawSqlBuilder.java

@@ -1,6 +1,7 @@
 package io.ebean;
 
 import java.sql.ResultSet;
+import java.sql.SQLException;
 
 /**
  * Builds RawSql instances from a SQL string and column mappings.
@@ -24,6 +25,13 @@ public interface RawSqlBuilder {
     return XServiceProvider.rawSql().resultSet(resultSet, propertyNames);
   }
 
+  /**
+   * Create and return a SqlRow based on the resultSet with dbTrueValue and binaryOptimizedUUID options.
+   */
+  static SqlRow sqlRow(ResultSet resultSet, final String dbTrueValue, boolean binaryOptimizedUUID) throws SQLException {
+    return XServiceProvider.rawSql().sqlRow(resultSet, dbTrueValue, binaryOptimizedUUID);
+  }
+
   /**
    * Return an unparsed RawSqlBuilder. Unlike a parsed one this query can not be
    * modified - so no additional WHERE or HAVING expressions can be added to

src/main/java/io/ebean/RowConsumer.java

@@ -0,0 +1,40 @@
+package io.ebean;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+/**
+ * Used with SqlQuery to process potentially large queries reading directly from the JDBC ResultSet.
+ * <p>
+ * This provides a low level option that reads directly from the JDBC ResultSet.
+ * </p>
+ *
+ * <pre>{@code
+ *
+ *  String sql = "select id, name, status from o_customer order by name desc";
+ *
+ *  Ebean.createSqlQuery(sql)
+ *    .findEachRow((resultSet, rowNum) -> {
+ *
+ *      // read directly from ResultSet
+ *
+ *      long id = resultSet.getLong(1);
+ *      String name = resultSet.getString(2);
+ *
+ *      // do something interesting with the data
+ *
+ *    });
+ *
+ * }</pre>
+ */
+@FunctionalInterface
+public interface RowConsumer {
+
+  /**
+   * Read the data from the ResultSet and process it.
+   *
+   * @param resultSet The JDBC ResultSet positioned to the current row
+   * @param rowNum    The number of the current row being mapped.
+   */
+  void accept(ResultSet resultSet, int rowNum) throws SQLException;
+}

src/main/java/io/ebean/RowMapper.java

@@ -0,0 +1,62 @@
+package io.ebean;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+/**
+ * Used with SqlQuery to map raw JDBC ResultSet to objects.
+ * <p>
+ * This provides a low level mapping option with direct use of JDBC ResultSet
+ * with the option of having logic in the mapping. For example, only map some
+ * columns depending on the values read from other columns.
+ * </p>
+ * <p>
+ * For straight mapping into beans then DtoQuery would be the first choice as
+ * it can automatically map the ResultSet into beans.
+ * </p>
+ *
+ * <pre>{@code
+ *
+ *    //
+ *    // A mapper from ResultSet into our CustomerDto bean
+ *    //
+ *    class CustomerMapper implements RowMapper<CustomerDto> {
+ *
+ *     @Override
+ *     public CustomerDto map(ResultSet rset, int rowNum) throws SQLException {
+ *
+ *       long id = rset.getLong(1);
+ *       String name = rset.getString(2);
+ *       String status = rset.getString(3);
+ *
+ *       return new CustomerDto(id, name, status);
+ *     }
+ *   }
+ *
+ *
+ *   //
+ *   // Then use the mapper
+ *   //
+ *
+ *   String sql = "select id, name, status from o_customer where name = ?";
+ *
+ *  CustomerDto rob = Ebean.createSqlQuery(sql)
+ *    .setParameter(1, "Rob")
+ *    .findOne(CUSTOMER_MAPPER);
+ *
+ *
+ * }</pre>
+ *
+ * @param <T> The type the row data is mapped into.
+ */
+@FunctionalInterface
+public interface RowMapper<T> {
+
+  /**
+   * Read the data from the ResultSet and map to the return type.
+   *
+   * @param resultSet The JDBC ResultSet positioned to the current row
+   * @param rowNum    The number of the current row being mapped.
+   */
+  T map(ResultSet resultSet, int rowNum) throws SQLException;
+}

src/main/java/io/ebean/SqlQuery.java

@@ -3,6 +3,7 @@ package io.ebean;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import java.io.Serializable;
+import java.math.BigDecimal;
 import java.util.List;
 import java.util.Optional;
 import java.util.function.Consumer;
@@ -77,12 +78,118 @@ public interface SqlQuery extends Serializable {
   @Nullable
   SqlRow findOne();
 
+  /**
+   * Execute the query returning a single result using the mapper.
+   *
+   * @param mapper Used to map each ResultSet row into the result object.
+   */
+  <T> T findOne(RowMapper<T> mapper);
+
+  /**
+   * Execute the query returning a list using the mapper.
+   *
+   * @param mapper Used to map each ResultSet row into the result object.
+   */
+  <T> List<T> findList(RowMapper<T> mapper);
+
+  /**
+   * Execute the query reading each row from ResultSet using the RowConsumer.
+   * <p>
+   * This provides a low level option that reads directly from the JDBC ResultSet
+   * and is good for processing very large results where (unlike findList) we don't
+   * hold all the results in memory but instead can process row by row.
+   * </p>
+   *
+   * <pre>{@code
+   *
+   *  String sql = "select id, name, status from customer order by name desc";
+   *
+   *  Ebean.createSqlQuery(sql)
+   *    .findEachRow((resultSet, rowNum) -> {
+   *
+   *      // read directly from ResultSet
+   *
+   *      long id = resultSet.getLong(1);
+   *      String name = resultSet.getString(2);
+   *
+   *      // do something interesting with the data
+   *
+   *    });
+   *
+   * }</pre>
+   *
+   * @param consumer Used to read and process each ResultSet row.
+   */
+  void findEachRow(RowConsumer consumer);
+
   /**
    * Execute the query returning an optional row.
    */
   @Nonnull
   Optional<SqlRow> findOneOrEmpty();
 
+  /**
+   * Execute the query returning a single scalar attribute.
+   * <pre>@{code
+   *
+   *   String sql = "select max(unit_price) from o_order_detail where order_qty > ?";
+   *
+   *   BigDecimal maxPrice = Ebean.createSqlQuery(sql)
+   *     .setParameter(1, 2)
+   *     .findSingleAttribute(BigDecimal.class);
+   *
+   * }</pre>
+   *
+   * <p>
+   * The attributeType can be any scalar type that Ebean supports (includes javax time types, Joda types etc).
+   * </p>
+   *
+   * @param attributeType The type of the returned value
+   */
+  <T> T findSingleAttribute(Class<T> attributeType);
+
+  /**
+   * Execute the query returning a single BigDecimal value.
+   * <p>
+   * This is an alias for <code>findSingleAttribute(BigDecimal.class)</code>
+   * </p>
+   */
+  BigDecimal findSingleDecimal();
+
+  /**
+   * Execute the query returning a single Long value.
+   * <p>
+   * This is an alias for <code>findSingleAttribute(Long.class)</code>
+   * </p>
+   */
+  Long findSingleLong();
+
+  /**
+   * Execute the query returning a list of scalar attribute values.
+   *
+   * <pre>{@code
+   *
+   *   String sql =
+   *   " select (unit_price * order_qty) " +
+   *   " from o_order_detail " +
+   *   " where unit_price > ? " +
+   *   " order by (unit_price * order_qty) desc";
+   *
+   *   //
+   *   List<BigDecimal> lineAmounts = Ebean.createSqlQuery(sql)
+   *     .setParameter(1, 3)
+   *     .findSingleAttributeList(BigDecimal.class);
+   *
+   * }</pre>
+   *
+   * <p>
+   * The attributeType can be any scalar type that Ebean supports (includes javax time types, Joda types etc).
+   * </p>
+   *
+   * @param attributeType The type of the returned value
+   */
+  <T> List<T> findSingleAttributeList(Class<T> attributeType);
+
   /**
    * The same as bind for named parameters.
    */
@@ -115,6 +222,11 @@ public interface SqlQuery extends Serializable {
    */
   SqlQuery setTimeout(int secs);
 
+  /**
+   * Set a label that can be put on performance metrics that are collected.
+   */
+  SqlQuery setLabel(String label);
+
   /**
    * A hint which for JDBC translates to the Statement.fetchSize().
    * <p>

src/main/java/io/ebean/SqlUpdate.java

@@ -19,15 +19,73 @@ package io.ebean;
  * <p>
  * <pre>{@code
  *
- * // example that uses 'named' parameters
- * String s = "UPDATE f_topic set post_count = :count where id = :id";
- * SqlUpdate update = Ebean.createSqlUpdate(s);
- * update.setParameter("id", 1);
- * update.setParameter("count", 50);
+ *   // example that uses 'named' parameters
  *
- * int modifiedCount = Ebean.execute(update);
+ *   String s = "UPDATE f_topic set post_count = :count where id = :id";
  *
- * String msg = "There were " + modifiedCount + " rows updated";
+ *   SqlUpdate update = Ebean.createSqlUpdate(s);
+ *   update.setParameter("id", 1);
+ *   update.setParameter("count", 50);
+ *
+ *   int modifiedCount = update.execute();
+ *
+ *   String msg = "There were " + modifiedCount + " rows updated";
+ *
+ * }</pre>
+ * <p>
+ * <h3>Example: Using setNextParameter()</h3>
+ * <pre>{@code
+ *
+ *  String sql = "insert into audit_log (id, description, modified_description) values (?,?,?)";
+ *  SqlUpdate insert = Ebean.createSqlUpdate(sql);
+ *
+ *  try (Transaction txn = Ebean.beginTransaction()) {
+ *    txn.setBatchMode(true);
+ *
+ *    insert.setNextParameter(10000);
+ *    insert.setNextParameter("hello");
+ *    insert.setNextParameter("rob");
+ *    insert.execute();
+ *
+ *    insert.setNextParameter(10001);
+ *    insert.setNextParameter("goodbye");
+ *    insert.setNextParameter("rob");
+ *    insert.execute();
+ *
+ *    insert.setNextParameter(10002);
+ *    insert.setNextParameter("chow");
+ *    insert.setNextParameter("bob");
+ *    insert.execute();
+ *
+ *    txn.commit();
+ *  }
+ * }</pre>
+ * <p>
+ * An alternative to the batch mode on the transaction is to use addBatch() and executeBatch() like:
+ * </p>
+ * <pre>{@code
+ *
+ *   try (Transaction txn = Ebean.beginTransaction()) {
+ *
+ *     insert.setNextParameter(10000);
+ *     insert.setNextParameter("hello");
+ *     insert.setNextParameter("rob");
+ *     insert.addBatch();
+ *
+ *     insert.setNextParameter(10001);
+ *     insert.setNextParameter("goodbye");
+ *     insert.setNextParameter("rob");
+ *     insert.addBatch();
+ *
+ *     insert.setNextParameter(10002);
+ *     insert.setNextParameter("chow");
+ *     insert.setNextParameter("bob");
+ *     insert.addBatch();
+ *
+ *     int[] rows = insert.executeBatch();
+ *
+ *     txn.commit();
+ *   }
  *
  * }</pre>
  *
@@ -54,6 +112,18 @@ public interface SqlUpdate {
    */
   int execute();
 
+  /**
+   * Execute when addBatch() has been used to batch multiple bind executions.
+   *
+   * @return The row counts for each of the batched statements.
+   */
+  int[] executeBatch();
+
+  /**
+   * Add the statement to batch processing to then later execute via executeBatch().
+   */
+  void addBatch();
+
   /**
    * Return the generated key value.
    */
@@ -61,7 +131,7 @@ public interface SqlUpdate {
 
   /**
    * Execute and return the generated key. This is effectively a short cut for:
-   *
+   * <p>
    * <pre>{@code
    *
    *   sqlUpdate.execute();
@@ -137,6 +207,13 @@ public interface SqlUpdate {
    */
   SqlUpdate setTimeout(int secs);
 
+  /**
+   * Set the next positioned parameter.
+   *
+   * @param value The value to bind
+   */
+  SqlUpdate setNextParameter(Object value);
+
   /**
    * Set a parameter via its index position.
    */

src/main/java/io/ebean/Transaction.java

@@ -23,6 +23,7 @@ public interface Transaction extends AutoCloseable {
    * This returns the current transaction for the 'default server'.  If you are using
    * multiple EbeanServer's then use {@link EbeanServer#currentTransaction()}.
    * </p>
+   *
    * @see Ebean#currentTransaction()
    * @see EbeanServer#currentTransaction()
    */
@@ -136,6 +137,18 @@ public interface Transaction extends AutoCloseable {
    */
   void rollback(Throwable e) throws PersistenceException;
 
+  /**
+   * Set when we want nested transactions to use Savepoint's.
+   * <p>
+   * This means that for a nested transaction:
+   * <ul>
+   * <li>begin transaction maps to creating a savepoint</li>
+   * <li>commit transaction maps to releasing a savepoint</li>
+   * <li>rollback transaction maps to rollback a savepoint</li>
+   * </ul>
+   */
+  void setNestedUseSavepoint();
+
   /**
    * Mark the transaction for rollback only.
    */
@@ -151,7 +164,6 @@ public interface Transaction extends AutoCloseable {
    */
   void end();
 
-
   /**
    * Synonym for end() to support AutoClosable.
    */
@@ -227,7 +239,7 @@ public interface Transaction extends AutoCloseable {
    * Refer to {@link ServerConfig#setSkipCacheAfterWrite(boolean)} for configuring the default behavior
    * for using the L2 bean cache in transactions spanning multiple query/persist requests.
    * </p>
-   * <p>
+   *
    * <pre>{@code
    *
    *   // assume Customer has L2 bean caching enabled ...
@@ -309,7 +321,7 @@ public interface Transaction extends AutoCloseable {
    * <p>
    * Example: batch processing executing every 3 rows
    * </p>
-   * <p>
+   *
    * <pre>{@code
    *
    * String data = "This is a simple test of the batch processing"
@@ -347,7 +359,10 @@ public interface Transaction extends AutoCloseable {
   void setBatchMode(boolean useBatch);
 
   /**
-   * The JDBC batch mode to use for this transaction.
+   * Deprecated - migrate to {@link #setBatchMode(boolean)}.
+   * <p>
+   * Set the JDBC batch mode to use for this transaction.
+   * </p>
    * <p>
    * If this is NONE then JDBC batch can still be used for each request - save(), insert(), update() or delete()
    * and this would be useful if the request cascades to detail beans.
@@ -356,15 +371,23 @@ public interface Transaction extends AutoCloseable {
    * @param persistBatchMode the batch mode to use for this transaction
    * @see io.ebean.config.ServerConfig#setPersistBatch(PersistBatch)
    */
+  @Deprecated
   void setBatch(PersistBatch persistBatchMode);
 
+  /**
+   * Deprecated - migrate to {@link #isBatchMode()}.
+   * Return the batch mode at the transaction level.
+   */
+  @Deprecated
+  PersistBatch getBatch();
+
   /**
    * Return the batch mode at the transaction level.
    */
-  PersistBatch getBatch();
+  boolean isBatchMode();
 
   /**
-   * Set the JDBC batch mode to use for a save() or delete() request.
+   * Set the JDBC batch mode to use for a save() or delete() when cascading to children.
    * <p>
    * This only takes effect when batch mode on the transaction has not already meant that
    * JDBC batch mode is being used.
@@ -373,17 +396,36 @@ public interface Transaction extends AutoCloseable {
    * This is useful when the single save() or delete() cascades. For example, inserting a 'master' cascades
    * and inserts a collection of 'detail' beans. The detail beans can be inserted using JDBC batch.
    * </p>
+   * <p>
+   * This is effectively already turned on for all platforms apart from older Sql Server.
+   * </p>
    *
-   * @param batchOnCascadeMode the batch mode to use per save(), insert(), update() or delete()
+   * @param batchMode the batch mode to use per save(), insert(), update() or delete()
    * @see io.ebean.config.ServerConfig#setPersistBatchOnCascade(PersistBatch)
    */
+  void setBatchOnCascade(boolean batchMode);
+
+  /**
+   * Set the batch mode when cascading.
+   * <p>
+   * Deprecated in favour of {@link #setBatchOnCascade(boolean)}
+   * </p>
+   */
+  @Deprecated
   void setBatchOnCascade(PersistBatch batchOnCascadeMode);
 
   /**
+   * Deprecated - migrate to {@link #isBatchMode()}.
    * Return the batch mode at the request level (for each save(), insert(), update() or delete()).
    */
+  @Deprecated
   PersistBatch getBatchOnCascade();
 
+  /**
+   * Return the batch mode at the request level.
+   */
+  boolean isBatchOnCascade();
+
   /**
    * Specify the number of statements before a batch is flushed automatically.
    */

src/main/java/io/ebean/Update.java

@@ -152,6 +152,11 @@ public interface Update<T> {
    */
   Update<T> setNullParameter(String name, int jdbcType);
 
+  /**
+   * Set a label meaning performance metrics will be collected for the execution of this update.
+   */
+  Update<T> setLabel(String label);
+
   /**
    * Return the sql that is actually executed.
    */

src/main/java/io/ebean/XServiceProvider.java

@@ -1,5 +1,6 @@
 package io.ebean;
 
+import io.ebean.service.SpiFetchGroupService;
 import io.ebean.service.SpiProfileLocationFactory;
 import io.ebean.service.SpiRawSqlService;
 
@@ -15,6 +16,16 @@ class XServiceProvider {
 
   private static SpiProfileLocationFactory profileLocationFactory = initProfileLocation();
 
+  private static SpiFetchGroupService fetchGroupService = initSpiFetchGroupService();
+
+  private static SpiFetchGroupService initSpiFetchGroupService() {
+    Iterator<SpiFetchGroupService> loader = ServiceLoader.load(SpiFetchGroupService.class).iterator();
+    if (loader.hasNext()) {
+      return loader.next();
+    }
+    throw new IllegalStateException("No service implementation found for SpiFetchGroupService?");
+  }
+
   private static SpiRawSqlService initRawSql() {
 
     Iterator<SpiRawSqlService> loader = ServiceLoader.load(SpiRawSqlService.class).iterator();
@@ -47,4 +58,17 @@ class XServiceProvider {
     return profileLocationFactory;
   }
 
+  /**
+   * Return the FetchGroup with the given select clause.
+   */
+  static <T> FetchGroup<T> fetchGroupOf(Class<T> cls, String select) {
+    return fetchGroupService.of(cls, select);
+  }
+
+  /**
+   * Return the FetchGroupBuilder with the given select clause.
+   */
+  static <T> FetchGroupBuilder<T> fetchGroupOf(Class<T> cls) {
+    return fetchGroupService.of(cls);
+  }
 }

src/main/java/io/ebean/bean/BeanCollection.java

@@ -72,6 +72,11 @@ public interface BeanCollection<E> extends Serializable {
    */
   boolean isSkipSave();
 
+  /**
+   * Return true if the collection holds modifications.
+   */
+  boolean holdsModifications();
+
   /**
    * Return the bean that owns this collection.
    */

src/main/java/io/ebean/bean/EntityBeanIntercept.java

@@ -52,6 +52,8 @@ public final class EntityBeanIntercept implements Serializable {
    */
   private int state;
 
+  private boolean forceUpdate;
+
   private boolean readOnly;
 
   private boolean dirty;
@@ -131,6 +133,20 @@ public final class EntityBeanIntercept implements Serializable {
     this.nodeUsageCollector = usageCollector;
   }
 
+  /**
+   * Return the ownerId (IdClass).
+   */
+  public Object getOwnerId() {
+    return ownerId;
+  }
+
+  /**
+   * Set the ownerId (IdClass).
+   */
+  public void setOwnerId(Object ownerId) {
+    this.ownerId = ownerId;
+  }
+
   /**
    * Return the owning bean for an embedded bean.
    */
@@ -292,6 +308,20 @@ public final class EntityBeanIntercept implements Serializable {
     this.readOnly = readOnly;
   }
 
+  /**
+   * Set the bean to be updated when persisted (for merge).
+   */
+  public void setForceUpdate(boolean forceUpdate) {
+    this.forceUpdate = forceUpdate;
+  }
+
+  /**
+   * Return true if the entity should be updated.
+   */
+  public boolean isUpdate() {
+    return forceUpdate || state == STATE_LOADED;
+  }
+
   /**
    * Return true if the entity has been loaded.
    */
@@ -529,6 +559,16 @@ public final class EntityBeanIntercept implements Serializable {
     }
   }
 
+  /**
+   * Set old value but force it to be set regardless if it already has a value.
+   */
+  private void setOriginalValueForce(int propertyIndex, Object value) {
+    if (origValues == null) {
+      origValues = new Object[owner._ebean_getPropertyNames().length];
+    }
+    origValues[propertyIndex] = value;
+  }
+
   /**
    * For forced update on a 'New' bean set all the loaded properties to changed.
    */
@@ -901,15 +941,19 @@ public final class EntityBeanIntercept implements Serializable {
 
     if (setDirtyState) {
       setOriginalValue(propertyIndex, origValue);
-      if (!dirty) {
-        dirty = true;
-        if (embeddedOwner != null) {
-          // Cascade dirty state from Embedded bean to parent bean
-          embeddedOwner._ebean_getIntercept().setEmbeddedDirty(embeddedOwnerIndex);
-        }
-        if (nodeUsageCollector != null) {
-          nodeUsageCollector.setModified();
-        }
+      setDirtyStatus();
+    }
+  }
+
+  private void setDirtyStatus() {
+    if (!dirty) {
+      dirty = true;
+      if (embeddedOwner != null) {
+        // Cascade dirty state from Embedded bean to parent bean
+        embeddedOwner._ebean_getIntercept().setEmbeddedDirty(embeddedOwnerIndex);
+      }
+      if (nodeUsageCollector != null) {
+        nodeUsageCollector.setModified();
       }
     }
   }
@@ -1049,10 +1093,12 @@ public final class EntityBeanIntercept implements Serializable {
   }
 
   /**
-   * Explicitly set an old value.
+   * Explicitly set an old value with force (the old value is forced even it is already set).
    */
   public void setOldValue(int propertyIndex, Object oldValue) {
-    setChangedPropertyValue(propertyIndex, true, oldValue);
+    setChangedProperty(propertyIndex);
+    setOriginalValueForce(propertyIndex, oldValue);
+    setDirtyStatus();
   }
 
   /**

src/main/java/io/ebean/cache/QueryCacheEntry.java

@@ -0,0 +1,54 @@
+package io.ebean.cache;
+
+import java.util.Set;
+
+/**
+ * For query cache entries we additionally hold the dependent tables and timestamp for the query result.
+ * <p>
+ * We use the dependent tables and timestamp to validate that tables the query joins to have not been
+ * modified since the query cache entry was cached. If any dependent tables have since been modified
+ * the query cache entry is treated as invalid.
+ * </p>
+ */
+public class QueryCacheEntry {
+
+  private final Object value;
+
+  private final Set<String> dependentTables;
+
+  private final long timestamp;
+
+  /**
+   * Create with dependent tables and timestamp.
+   *
+   * @param value           The query result being cached
+   * @param dependentTables The extra tables the query is dependent on (joins to)
+   * @param timestamp       The timestamp that the query uses to check for modifications
+   */
+  public QueryCacheEntry(Object value, Set<String> dependentTables, long timestamp) {
+    this.value = value;
+    this.dependentTables = dependentTables;
+    this.timestamp = timestamp;
+  }
+
+  /**
+   * Return the actual query result.
+   */
+  public Object getValue() {
+    return value;
+  }
+
+  /**
+   * Return the tables the query result is dependent on.
+   */
+  public Set<String> getDependentTables() {
+    return dependentTables;
+  }
+
+  /**
+   * Return the timestamp used to check for modifications on the dependent tables.
+   */
+  public long getTimestamp() {
+    return timestamp;
+  }
+}

src/main/java/io/ebean/cache/QueryCacheEntryValidate.java

@@ -0,0 +1,12 @@
+package io.ebean.cache;
+
+/**
+ * Used to validate that a query cache entry is still valid based on dependent tables.
+ */
+public interface QueryCacheEntryValidate {
+
+  /**
+   * Return true if the entry is still valid based on dependent tables.
+   */
+  boolean isValid(QueryCacheEntry queryCacheEntry);
+}

src/main/java/io/ebean/cache/ServerCacheConfig.java

@@ -0,0 +1,65 @@
+package io.ebean.cache;
+
+import io.ebean.config.CurrentTenantProvider;
+
+/**
+ * Configuration used to create ServerCache instances.
+ */
+public class ServerCacheConfig {
+
+  private final ServerCacheType type;
+  private final String cacheKey;
+  private final ServerCacheOptions cacheOptions;
+  private final CurrentTenantProvider tenantProvider;
+  private final QueryCacheEntryValidate queryCacheEntryValidate;
+
+  public ServerCacheConfig(ServerCacheType type, String cacheKey, ServerCacheOptions cacheOptions, CurrentTenantProvider tenantProvider, QueryCacheEntryValidate queryCacheEntryValidate) {
+    this.type = type;
+    this.cacheKey = cacheKey;
+    this.cacheOptions = cacheOptions;
+    this.tenantProvider = tenantProvider;
+    this.queryCacheEntryValidate = queryCacheEntryValidate;
+  }
+
+  /**
+   * Return the cache type.
+   */
+  public ServerCacheType getType() {
+    return type;
+  }
+
+  /**
+   * Return the name of the cache.
+   */
+  public String getCacheKey() {
+    return cacheKey;
+  }
+
+  /**
+   * Return the tuning options.
+   */
+  public ServerCacheOptions getCacheOptions() {
+    return cacheOptions;
+  }
+
+  /**
+   * Return the current tenant provider.
+   */
+  public CurrentTenantProvider getTenantProvider() {
+    return tenantProvider;
+  }
+
+  /**
+   * Return the service that provides validation for query cache entries.
+   */
+  public QueryCacheEntryValidate getQueryCacheEntryValidate() {
+    return queryCacheEntryValidate;
+  }
+
+  /**
+   * Return true if the cache is a query cache.
+   */
+  public boolean isQueryCache() {
+    return type == ServerCacheType.QUERY;
+  }
+}

src/main/java/io/ebean/cache/ServerCacheFactory.java

@@ -1,7 +1,5 @@
 package io.ebean.cache;
 
-import io.ebean.config.CurrentTenantProvider;
-
 /**
  * Defines method for constructing caches for beans and queries.
  */
@@ -10,6 +8,15 @@ public interface ServerCacheFactory {
   /**
    * Create the cache for the given type with options.
    */
-  ServerCache createCache(ServerCacheType type, String cacheKey, CurrentTenantProvider tenantProvider, ServerCacheOptions cacheOptions);
+  ServerCache createCache(ServerCacheConfig config);
 
+  /**
+   * Return a ServerCacheNotify that we will send ServerCacheNotification events to.
+   * <p>
+   * This is used if a ServerCacheNotifyPlugin is not supplied.
+   * </p>
+   *
+   * @param listener The listener that should be used to process the notification events.
+   */
+  ServerCacheNotify createCacheNotify(ServerCacheNotify listener);
 }

src/main/java/io/ebean/cache/ServerCacheNotification.java

@@ -0,0 +1,29 @@
+package io.ebean.cache;
+
+import java.util.Set;
+
+/**
+ * Notification event that dependent tables have been modified.
+ * <p>
+ * This is sent to other interested servers (in the cluster).
+ * </p>
+ */
+public class ServerCacheNotification {
+
+  private final long modifyTimestamp;
+
+  private final Set<String> dependentTables;
+
+  public ServerCacheNotification(long modifyTimestamp, Set<String> dependentTables) {
+    this.modifyTimestamp = modifyTimestamp;
+    this.dependentTables = dependentTables;
+  }
+
+  public long getModifyTimestamp() {
+    return modifyTimestamp;
+  }
+
+  public Set<String> getDependentTables() {
+    return dependentTables;
+  }
+}

src/main/java/io/ebean/cache/ServerCacheNotify.java

@@ -0,0 +1,12 @@
+package io.ebean.cache;
+
+/**
+ * Interface for both listening to notification changes and sending them to other members of the cluster.
+ */
+public interface ServerCacheNotify {
+
+  /**
+   * Notify other server cache members of the table modifications or process the notifications.
+   */
+  void notify(ServerCacheNotification notification);
+}

src/main/java/io/ebean/cache/ServerCacheNotifyPlugin.java

@@ -0,0 +1,17 @@
+package io.ebean.cache;
+
+import io.ebean.config.ServerConfig;
+
+/**
+ * Plugin that provides a ServerCacheNotify implementation.
+ * <p>
+ * Is supplied this will be used to send the ServerCacheNotification event to other cluster members.
+ * </p>
+ */
+public interface ServerCacheNotifyPlugin {
+
+  /**
+   * Create a ServerCacheNotify implementation given the server configuration.
+   */
+  ServerCacheNotify create(ServerConfig serverConfig);
+}

src/main/java/io/ebean/common/AbstractBeanCollection.java

@@ -6,7 +6,6 @@ import io.ebean.bean.BeanCollection;
 import io.ebean.bean.BeanCollectionLoader;
 import io.ebean.bean.EntityBean;
 
-import javax.persistence.PersistenceException;
 import java.util.Set;
 
 /**
@@ -64,7 +63,7 @@ abstract class AbstractBeanCollection<E> implements BeanCollection<E> {
     this.ebeanServerName = loader.getName();
     this.ownerBean = ownerBean;
     this.propertyName = propertyName;
-    this.readOnly = ownerBean._ebean_getIntercept().isReadOnly();
+    this.readOnly = ownerBean != null && ownerBean._ebean_getIntercept().isReadOnly();
   }
 
   @Override
@@ -96,13 +95,6 @@ abstract class AbstractBeanCollection<E> implements BeanCollection<E> {
     if (loader == null) {
       loader = (BeanCollectionLoader) Ebean.getServer(ebeanServerName);
     }
-    if (loader == null) {
-      String msg = "Lazy loading but LazyLoadEbeanServer is null?"
-        + " The LazyLoadEbeanServer needs to be set after deserialization"
-        + " to support lazy loading.";
-      throw new PersistenceException(msg);
-    }
-
     loader.loadMany(this, onlyIds);
     checkEmptyLazyLoad();
   }
@@ -215,7 +207,8 @@ abstract class AbstractBeanCollection<E> implements BeanCollection<E> {
   /**
    * Return true if there are underlying additions or removals.
    */
-  boolean holdsModifications() {
+  @Override
+  public boolean holdsModifications() {
     return modifyHolder != null && modifyHolder.hasModifications();
   }
 

src/main/java/io/ebean/config/AutoConfigure.java

@@ -6,10 +6,13 @@ package io.ebean.config;
 public interface AutoConfigure {
 
   /**
-   * Provide some configuration the ServerConfig prior to server creation.
-   * <p>
-   * Return true if the autoConfiguration applies to this ServerConfig.
+   * Perform configuration for the ServerConfig prior to properties load.
    */
-  void configure(ServerConfig serverConfig);
+  void preConfigure(ServerConfig serverConfig);
+
+  /**
+   * Provide some configuration the ServerConfig prior to server creation but after properties have been applied.
+   */
+  void postConfigure(ServerConfig serverConfig);
 
 }

src/main/java/io/ebean/config/DbMigrationConfig.java

@@ -102,6 +102,11 @@ public class DbMigrationConfig {
    */
   protected Map<String, String> runPlaceholderMap;
 
+  /**
+   * DB schema used for the migration (and testing).
+   */
+  protected String dbSchema;
+
   /**
    * DB user used to run the DB migration.
    */
@@ -373,6 +378,33 @@ public class DbMigrationConfig {
     this.dbPassword = dbPassword;
   }
 
+  /**
+   * Return the DB schema to use (for migration, testing etc).
+   */
+  public String getDbSchema() {
+    String schema = readEnvironment("ddl.migration.schema");
+    if (schema != null) {
+      return schema;
+    }
+    return dbSchema;
+  }
+
+  /**
+   * Set the Db schema to use.
+   */
+  public void setDbSchema(String dbSchema) {
+    this.dbSchema = dbSchema;
+  }
+
+  /**
+   * Set the Db schema if it hasn't already been defined.
+   */
+  public void setDefaultDbSchema(String dbSchema) {
+    if (this.dbSchema == null) {
+      this.dbSchema = dbSchema;
+    }
+  }
+
   /**
    * Return migration versions that should be added to history without running.
    */
@@ -402,9 +434,20 @@ public class DbMigrationConfig {
    * You can use placeholders like ${version} or ${timestamp} in properties file.
    */
   public String getDdlHeader() {
+    if (ddlHeader != null && !ddlHeader.isEmpty()) {
+      ddlHeader = StringHelper.replaceString(ddlHeader, "${version}", EbeanVersion.getVersion());
+      ddlHeader = StringHelper.replaceString(ddlHeader, "${timestamp}", ZonedDateTime.now().format( DateTimeFormatter.ISO_INSTANT ));
+    }
     return ddlHeader;
   }
 
+  /**
+   * Set the header prepended to the DDL.
+   */
+  public void setDdlHeader(String ddlHeader) {
+    this.ddlHeader = ddlHeader;
+  }
+
   /**
    * Set migration versions that should have their checksum reset and not run.
    * <p>
@@ -464,19 +507,18 @@ public class DbMigrationConfig {
     runMigration = properties.getBoolean("migration.run", runMigration);
     metaTable = properties.get("migration.metaTable", metaTable);
     runPlaceholders = properties.get("migration.placeholders", runPlaceholders);
+    dbSchema = properties.get("migration.dbSchema", dbSchema);
 
-    String adminUser = properties.get("datasource." + serverName + ".username", dbUsername);
-    adminUser = properties.get("datasource." + serverName + ".adminusername", adminUser);
+    //Do not set user and pass from "datasource.db.username"
+    //There is a null test in MigrationRunner::getConnection to handle this
+    //String adminUser = properties.get("datasource." + serverName + ".username", dbUsername);
+    String adminUser = properties.get("datasource." + serverName + ".adminusername", dbUsername);
     dbUsername = properties.get("migration.dbusername", adminUser);
 
-    String adminPwd = properties.get("datasource." + serverName + ".password", dbPassword);
-    adminPwd = properties.get("datasource." + serverName + ".adminpassword", adminPwd);
+    //String adminPwd = properties.get("datasource." + serverName + ".password", dbPassword);
+    String adminPwd = properties.get("datasource." + serverName + ".adminpassword", dbPassword);
     dbPassword = properties.get("migration.dbpassword", adminPwd);
     ddlHeader = properties.get("ddl.header", ddlHeader);
-    if (ddlHeader != null && !ddlHeader.isEmpty()) {
-      ddlHeader = StringHelper.replaceString(ddlHeader, "${version}", EbeanVersion.getVersion());
-      ddlHeader = StringHelper.replaceString(ddlHeader, "${timestamp}", ZonedDateTime.now().format( DateTimeFormatter.ISO_INSTANT ));
-    }
   }
 
   /**
@@ -548,6 +590,7 @@ public class DbMigrationConfig {
     runnerConfig.setRunPlaceholders(runPlaceholders);
     runnerConfig.setDbUsername(getDbUsername());
     runnerConfig.setDbPassword(getDbPassword());
+    runnerConfig.setDbSchema(getDbSchema());
     runnerConfig.setClassLoader(classLoader);
     if (patchInsertOn != null) {
       runnerConfig.setPatchInsertOn(patchInsertOn);

src/main/java/io/ebean/config/DbTypeConfig.java

@@ -1,124 +0,0 @@
-package io.ebean.config;
-
-import io.ebean.config.dbplatform.DbType;
-import io.ebean.config.dbplatform.IdType;
-import io.ebean.annotation.Platform;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Configuration for DB types such as UUID, Geometry etc.
- */
-public class DbTypeConfig {
-
-  /**
-   * The Geometry SRID value (default 4326).
-   */
-  private int geometrySRID = 4326;
-
-  /**
-   * Set for DB's that support both Sequence and Identity (and the default choice is not desired).
-   */
-  private IdType idType;
-
-  /**
-   * Setting to indicate if UUID should be stored as binary(16) or varchar(40) or native DB type (for H2 and Postgres).
-   */
-  private ServerConfig.DbUuid dbUuid = ServerConfig.DbUuid.AUTO_VARCHAR;
-
-  /**
-   * Modify the default mapping of standard types such as default precision for DECIMAL etc.
-   */
-  private List<CustomDbTypeMapping> customDbTypeMappings = new ArrayList<>();
-
-  /**
-   * Return the Geometry SRID.
-   */
-  public int getGeometrySRID() {
-    return geometrySRID;
-  }
-
-  /**
-   * Set the Geometry SRID.
-   */
-  public void setGeometrySRID(int geometrySRID) {
-    this.geometrySRID = geometrySRID;
-  }
-
-  /**
-   * Return the DB type used to store UUID.
-   */
-  public ServerConfig.DbUuid getDbUuid() {
-    return dbUuid;
-  }
-
-  /**
-   * Set the DB type used to store UUID.
-   */
-  public void setDbUuid(ServerConfig.DbUuid dbUuid) {
-    this.dbUuid = dbUuid;
-  }
-
-  /**
-   * Return the IdType to use (or null for the default choice).
-   */
-  public IdType getIdType() {
-    return idType;
-  }
-
-  /**
-   * Set the IdType to use (when the DB supports both SEQUENCE and IDENTITY and the default is not desired).
-   */
-  public void setIdType(IdType idType) {
-    this.idType = idType;
-  }
-
-  /**
-   * Add a custom type mapping.
-   * <p>
-   * <pre>{@code
-   *
-   *   // set the default mapping for BigDecimal.class/decimal
-   *   serverConfig.addCustomMapping(DbType.DECIMAL, "decimal(18,6)");
-   *
-   *   // set the default mapping for String.class/varchar but only for Postgres
-   *   serverConfig.addCustomMapping(DbType.VARCHAR, "text", Platform.POSTGRES);
-   *
-   * }</pre>
-   *
-   * @param type             The DB type this mapping should apply to
-   * @param columnDefinition The column definition that should be used
-   * @param platform         Optionally specify the platform this mapping should apply to.
-   */
-  public void addCustomMapping(DbType type, String columnDefinition, Platform platform) {
-    customDbTypeMappings.add(new CustomDbTypeMapping(type, columnDefinition, platform));
-  }
-
-  /**
-   * Add a custom type mapping that applies to all platforms.
-   * <p>
-   * <pre>{@code
-   *
-   *   // set the default mapping for BigDecimal/decimal
-   *   serverConfig.addCustomMapping(DbType.DECIMAL, "decimal(18,6)");
-   *
-   *   // set the default mapping for String/varchar
-   *   serverConfig.addCustomMapping(DbType.VARCHAR, "text");
-   *
-   * }</pre>
-   *
-   * @param type             The DB type this mapping should apply to
-   * @param columnDefinition The column definition that should be used
-   */
-  public void addCustomMapping(DbType type, String columnDefinition) {
-    customDbTypeMappings.add(new CustomDbTypeMapping(type, columnDefinition));
-  }
-
-  /**
-   * Return the list of custom type mappings.
-   */
-  public List<CustomDbTypeMapping> getCustomTypeMappings() {
-    return customDbTypeMappings;
-  }
-}

src/main/java/io/ebean/config/PlatformConfig.java

@@ -0,0 +1,335 @@
+package io.ebean.config;
+
+import io.ebean.annotation.Platform;
+import io.ebean.config.dbplatform.DbType;
+import io.ebean.config.dbplatform.IdType;
+import io.ebean.util.StringHelper;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+/**
+ * Configuration for DB types such as UUID, Geometry etc.
+ */
+public class PlatformConfig {
+
+  private boolean allQuotedIdentifiers;
+
+  /**
+   * The database boolean true value (typically either 1, T, or Y).
+   */
+  private String databaseBooleanTrue;
+
+  /**
+   * The database boolean false value (typically either 0, F or N).
+   */
+  private String databaseBooleanFalse;
+
+  /**
+   * For DB's using sequences this is the number of sequence values prefetched.
+   */
+  private int databaseSequenceBatchSize = 20;
+
+  /**
+   * Set for DB's that support both Sequence and Identity (and the default choice is not desired).
+   */
+  private IdType idType;
+
+  /**
+   * The Geometry SRID value (default 4326).
+   */
+  private int geometrySRID = 4326;
+
+  /**
+   * Setting to indicate if UUID should be stored as binary(16) or varchar(40) or native DB type (for H2 and Postgres).
+   */
+  private DbUuid dbUuid = DbUuid.AUTO_VARCHAR;
+
+  /**
+   * Modify the default mapping of standard types such as default precision for DECIMAL etc.
+   */
+  private List<CustomDbTypeMapping> customDbTypeMappings = new ArrayList<>();
+
+  /**
+   * Construct with defaults.
+   */
+  public PlatformConfig() {
+
+  }
+
+  /**
+   * Construct based on given config - typically for DbMigration generation with many platforms.
+   */
+  public PlatformConfig(PlatformConfig platformConfig) {
+    this.databaseBooleanFalse = platformConfig.databaseBooleanFalse;
+    this.databaseBooleanTrue = platformConfig.databaseBooleanTrue;
+    this.databaseSequenceBatchSize = platformConfig.databaseSequenceBatchSize;
+    this.idType = platformConfig.idType;
+    this.geometrySRID = platformConfig.geometrySRID;
+    this.dbUuid = platformConfig.dbUuid;
+  }
+
+  /**
+   * Return true if all DB column and table names should use quoted identifiers.
+   */
+  public boolean isAllQuotedIdentifiers() {
+    return allQuotedIdentifiers;
+  }
+
+  /**
+   * Set to true if all DB column and table names should use quoted identifiers.
+   */
+  public void setAllQuotedIdentifiers(boolean allQuotedIdentifiers) {
+    this.allQuotedIdentifiers = allQuotedIdentifiers;
+  }
+
+  /**
+   * Return a value used to represent TRUE in the database.
+   * <p>
+   * This is used for databases that do not support boolean natively.
+   * </p>
+   * <p>
+   * The value returned is either a Integer or a String (e.g. "1", or "T").
+   * </p>
+   */
+  public String getDatabaseBooleanTrue() {
+    return databaseBooleanTrue;
+  }
+
+  /**
+   * Set the value to represent TRUE in the database.
+   * <p>
+   * This is used for databases that do not support boolean natively.
+   * </p>
+   * <p>
+   * The value set is either a Integer or a String (e.g. "1", or "T").
+   * </p>
+   */
+  public void setDatabaseBooleanTrue(String databaseBooleanTrue) {
+    this.databaseBooleanTrue = databaseBooleanTrue;
+  }
+
+  /**
+   * Return a value used to represent FALSE in the database.
+   */
+  public String getDatabaseBooleanFalse() {
+    return databaseBooleanFalse;
+  }
+
+  /**
+   * Set the value used to represent FALSE in the database.
+   */
+  public void setDatabaseBooleanFalse(String databaseBooleanFalse) {
+    this.databaseBooleanFalse = databaseBooleanFalse;
+  }
+
+  /**
+   * Return the number of DB sequence values that should be preallocated.
+   */
+  public int getDatabaseSequenceBatchSize() {
+    return databaseSequenceBatchSize;
+  }
+
+  /**
+   * Set the number of DB sequence values that should be preallocated.
+   */
+  public void setDatabaseSequenceBatchSize(int databaseSequenceBatchSize) {
+    this.databaseSequenceBatchSize = databaseSequenceBatchSize;
+  }
+
+  /**
+   * Return the Geometry SRID.
+   */
+  public int getGeometrySRID() {
+    return geometrySRID;
+  }
+
+  /**
+   * Set the Geometry SRID.
+   */
+  public void setGeometrySRID(int geometrySRID) {
+    this.geometrySRID = geometrySRID;
+  }
+
+  /**
+   * Return the DB type used to store UUID.
+   */
+  public DbUuid getDbUuid() {
+    return dbUuid;
+  }
+
+  /**
+   * Set the DB type used to store UUID.
+   */
+  public void setDbUuid(DbUuid dbUuid) {
+    this.dbUuid = dbUuid;
+  }
+
+  /**
+   * Return the IdType to use (or null for the default choice).
+   */
+  public IdType getIdType() {
+    return idType;
+  }
+
+  /**
+   * Set the IdType to use (when the DB supports both SEQUENCE and IDENTITY and the default is not desired).
+   */
+  public void setIdType(IdType idType) {
+    this.idType = idType;
+  }
+
+  /**
+   * Add a custom type mapping.
+   * <p>
+   * <pre>{@code
+   *
+   *   // set the default mapping for BigDecimal.class/decimal
+   *   serverConfig.addCustomMapping(DbType.DECIMAL, "decimal(18,6)");
+   *
+   *   // set the default mapping for String.class/varchar but only for Postgres
+   *   serverConfig.addCustomMapping(DbType.VARCHAR, "text", Platform.POSTGRES);
+   *
+   * }</pre>
+   *
+   * @param type             The DB type this mapping should apply to
+   * @param columnDefinition The column definition that should be used
+   * @param platform         Optionally specify the platform this mapping should apply to.
+   */
+  public void addCustomMapping(DbType type, String columnDefinition, Platform platform) {
+    customDbTypeMappings.add(new CustomDbTypeMapping(type, columnDefinition, platform));
+  }
+
+  /**
+   * Add a custom type mapping that applies to all platforms.
+   * <p>
+   * <pre>{@code
+   *
+   *   // set the default mapping for BigDecimal/decimal
+   *   serverConfig.addCustomMapping(DbType.DECIMAL, "decimal(18,6)");
+   *
+   *   // set the default mapping for String/varchar
+   *   serverConfig.addCustomMapping(DbType.VARCHAR, "text");
+   *
+   * }</pre>
+   *
+   * @param type             The DB type this mapping should apply to
+   * @param columnDefinition The column definition that should be used
+   */
+  public void addCustomMapping(DbType type, String columnDefinition) {
+    customDbTypeMappings.add(new CustomDbTypeMapping(type, columnDefinition));
+  }
+
+  /**
+   * Return the list of custom type mappings.
+   */
+  public List<CustomDbTypeMapping> getCustomTypeMappings() {
+    return customDbTypeMappings;
+  }
+
+  public void loadSettings(PropertiesWrapper p) {
+
+    idType = p.getEnum(IdType.class, "idType", idType);
+    databaseSequenceBatchSize = p.getInt("databaseSequenceBatchSize", databaseSequenceBatchSize);
+    databaseBooleanTrue = p.get("databaseBooleanTrue", databaseBooleanTrue);
+    databaseBooleanFalse = p.get("databaseBooleanFalse", databaseBooleanFalse);
+
+    DbUuid dbUuid = p.getEnum(DbUuid.class, "dbuuid", null);
+    if (dbUuid != null) {
+      setDbUuid(dbUuid);
+    }
+    if (p.getBoolean("uuidStoreAsBinary", false)) {
+      setDbUuid(DbUuid.BINARY);
+    }
+
+    int srid = p.getInt("geometrySRID", 0);
+    if (srid > 0) {
+      setGeometrySRID(srid);
+    }
+
+    // Mapping is specified in the form: BOOLEAN=int(1);BIT=int(1);
+    String mapping = p.get("mapping");
+    if (mapping != null && !mapping.isEmpty()) {
+      Map<String, String> map = StringHelper.delimitedToMap(mapping, ";", "=");
+      for (Entry<String, String> entry : map.entrySet()) {
+        addCustomMapping(DbType.valueOf(entry.getKey()), entry.getValue());
+      }
+    }
+
+    boolean quotedIdentifiers = p.getBoolean("allQuotedIdentifiers", allQuotedIdentifiers);
+    if (quotedIdentifiers != allQuotedIdentifiers) {
+      // potentially also set to use matching naming convention
+      setAllQuotedIdentifiers(quotedIdentifiers);
+    }
+  }
+
+  /**
+   * Specify how UUID is stored.
+   */
+  public enum DbUuid {
+
+
+    /**
+     * Store using native UUID in H2 and Postgres and otherwise fallback to VARCHAR(40).
+     */
+    AUTO_VARCHAR(true, false, false),
+
+    /**
+     * Store using native UUID in H2 and Postgres and otherwise fallback to BINARY(16).
+     */
+    AUTO_BINARY(true, true, false),
+
+    /**
+     * Store using native UUID in H2 and Postgres and otherwise fallback to BINARY(16) with optimized packing.
+     */
+    AUTO_BINARY_OPTIMIZED(true, true, true),
+
+    /**
+     * Store using DB VARCHAR(40).
+     */
+    VARCHAR(false, false, false),
+
+    /**
+     * Store using DB BINARY(16).
+     */
+    BINARY(false, true, false),
+
+    /**
+     * Store using DB BINARY(16).
+     */
+    BINARY_OPTIMIZED(false, true, true);
+
+    boolean nativeType;
+    boolean binary;
+    boolean binaryOptimized;
+
+    DbUuid(boolean nativeType, boolean binary, boolean binaryOptimized) {
+      this.nativeType = nativeType;
+      this.binary = binary;
+      this.binaryOptimized = binaryOptimized;
+    }
+
+    /**
+     * Return true if native UUID type is preferred.
+     */
+    public boolean useNativeType() {
+      return nativeType;
+    }
+
+    /**
+     * Return true if BINARY(16) storage is preferred over VARCHAR(40).
+     */
+    public boolean useBinary() {
+      return binary;
+    }
+
+    /**
+     * Return true, if optimized packing should be used.
+     */
+    public boolean useBinaryOptimized() {
+      return binaryOptimized;
+    }
+  }
+}

src/main/java/io/ebean/config/PropertiesWrapper.java

@@ -10,20 +10,23 @@ public class PropertiesWrapper {
 
   protected final String serverName;
 
+  private final ClassLoadConfig classLoadConfig;
+
   /**
    * Construct with a prefix, serverName and properties.
    */
-  public PropertiesWrapper(String prefix, String serverName, Properties properties) {
+  public PropertiesWrapper(String prefix, String serverName, Properties properties, ClassLoadConfig classLoadConfig) {
     this.serverName = serverName;
     this.prefix = prefix;
     this.properties = properties;
+    this.classLoadConfig = classLoadConfig;
   }
 
   /**
    * Construct without prefix of serverName.
    */
-  public PropertiesWrapper(Properties properties) {
-    this(null, null, properties);
+  public PropertiesWrapper(Properties properties, ClassLoadConfig classLoadConfig) {
+    this(null, null, properties, classLoadConfig);
   }
 
   /**
@@ -115,4 +118,30 @@ public class PropertiesWrapper {
     return (level == null) ? defaultValue : Enum.valueOf(enumType, level.toUpperCase());
   }
 
+  /**
+   * Return the instance to use (can be null) for the given plugin.
+   *
+   * @param pluginType the type of plugin
+   * @param key        properties key
+   * @param instance   existing instance
+   */
+  public <T> T createInstance(Class<T> pluginType, String key, T instance) {
+
+    if (instance != null) {
+      return instance;
+    }
+    String classname = get(key, null);
+    return createInstance(pluginType, classname);
+  }
+
+  /**
+   * Return the instance to use (can be null) for the given plugin.
+   *
+   * @param pluginType the type of plugin
+   * @param classname  the implementation class as per properties
+   */
+  @SuppressWarnings("unchecked")
+  public <T> T createInstance(Class<T> pluginType, String classname) {
+    return classname == null ? null : (T) classLoadConfig.newInstance(classname);
+  }
 }

src/main/java/io/ebean/config/ServerConfig.java

@@ -33,6 +33,7 @@ import io.ebean.util.StringHelper;
 import org.avaje.datasource.DataSourceConfig;
 
 import javax.sql.DataSource;
+import java.time.Clock;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
@@ -57,22 +58,24 @@ import java.util.ServiceLoader;
  * <pre>{@code
  *
  * ServerConfig c = new ServerConfig();
- * c.setName("db");
  *
  * // read the ebean.properties and load
  * // those settings into this serverConfig object
  * c.loadFromProperties();
  *
- * // add any classes found in the app.data package
- * c.addPackage("com.myapp.domain");
- *
- * // register as the 'Default' server
- * c.setDefaultServer(true);
+ * // explicitly register the entity beans to avoid classpath scanning
+ * c.addClass(Customer.class);
+ * c.addClass(User.class);
  *
  * EbeanServer server = EbeanServerFactory.create(c);
  *
  * }</pre>
  *
+ * <p>
+ * Note that ServerConfigProvider provides a standard Java ServiceLoader mechanism that can
+ * be used to apply configuration to the ServerConfig.
+ * </p>
+ *
  * @author emcgreal
  * @author rbygrave
  * @see EbeanServerFactory
@@ -183,16 +186,6 @@ public class ServerConfig {
    */
   private DatabasePlatform databasePlatform;
 
-  /**
-   * The preferred IdType (to override the default Platform type).
-   */
-  private IdType idType;
-
-  /**
-   * For DB's using sequences this is the number of sequence values prefetched.
-   */
-  private int databaseSequenceBatchSize = 20;
-
   /**
    * JDBC fetchSize hint when using findList.  Defaults to 0 leaving it up to the JDBC driver.
    */
@@ -293,7 +286,7 @@ public class ServerConfig {
   /**
    * When true create a read only DataSource using readOnlyDataSourceConfig defaulting values from dataSourceConfig.
    * I believe this will default to true in some future release (as it has a nice performance benefit).
-   *
+   * <p>
    * autoReadOnlyDataSource is an unfortunate name for this config option but I haven't come up with a better one.
    */
   private boolean autoReadOnlyDataSource;
@@ -303,6 +296,11 @@ public class ServerConfig {
    */
   private DataSourceConfig readOnlyDataSourceConfig = new DataSourceConfig();
 
+  /**
+   * Optional - the database schema that should be used to own the tables etc.
+   */
+  private String dbSchema;
+
   /**
    * The db migration config (migration resource path etc).
    */
@@ -330,18 +328,6 @@ public class ServerConfig {
    */
   private String dataSourceJndiName;
 
-  /**
-   * The database boolean true value (typically either 1, T, or Y).
-   */
-  private String databaseBooleanTrue;
-
-  /**
-   * The database boolean false value (typically either 0, F or N).
-   */
-  private String databaseBooleanFalse;
-
-  private boolean allQuotedIdentifiers;
-
   /**
    * The naming convention.
    */
@@ -368,9 +354,24 @@ public class ServerConfig {
   private boolean updatesDeleteMissingChildren = true;
 
   /**
-   * Database type configuration.
+   * Database platform configuration.
    */
-  private DbTypeConfig dbTypeConfig = new DbTypeConfig();
+  private PlatformConfig platformConfig = new PlatformConfig();
+
+  /**
+   * The UUID version to use.
+   */
+  private UuidVersion uuidVersion = UuidVersion.VERSION4;
+
+  /**
+   * The UUID state file (for Version 1 UUIDs).
+   */
+  private String uuidStateFile = "ebean-uuid.state";
+
+  /**
+   * The clock used for setting the timestamps (e.g. @UpdatedTimestamp) on objects.
+   */
+  private Clock clock = Clock.systemUTC();
 
   private List<IdGenerator> idGenerators = new ArrayList<>();
   private List<BeanFindController> findControllers = new ArrayList<>();
@@ -470,6 +471,13 @@ public class ServerConfig {
    */
   private boolean disableL2Cache;
 
+
+  /**
+   * Should the javax.validation.constraints.NotNull enforce a notNull column in DB.
+   * If set to false, use io.ebean.annotation.NotNull or Column(nullable=true).
+   */
+  private boolean useJavaxValidationNotNull = true;
+
   /**
    * Generally we want to perform L2 cache notification in the background and not impact
    * the performance of executing transactions.
@@ -493,6 +501,16 @@ public class ServerConfig {
    */
   private boolean defaultOrderById = false;
 
+  /**
+   * The mappingLocations for searching xml mapping.
+   */
+  private List<String> mappingLocations = new ArrayList<>();
+
+  /**
+   * When true we do not need explicit GeneratedValue mapping.
+   */
+  private boolean idGeneratorAutomatic = true;
+
   /**
    * Construct a Server Configuration for programmatically creating an EbeanServer.
    */
@@ -500,6 +518,20 @@ public class ServerConfig {
 
   }
 
+  /**
+   * Get the clock used for setting the timestamps (e.g. @UpdatedTimestamp) on objects.
+   */
+  public Clock getClock() {
+    return clock;
+  }
+
+  /**
+   * Set the clock used for setting the timestamps (e.g. @UpdatedTimestamp) on objects.
+   */
+  public void setClock(final Clock clock) {
+    this.clock = clock;
+  }
+
   /**
    * Return the slow query time in millis.
    */
@@ -929,7 +961,7 @@ public class ServerConfig {
    * </p>
    */
   public void setDatabaseSequenceBatchSize(int databaseSequenceBatchSize) {
-    this.databaseSequenceBatchSize = databaseSequenceBatchSize;
+    platformConfig.setDatabaseSequenceBatchSize(databaseSequenceBatchSize);
   }
 
   /**
@@ -1093,6 +1125,25 @@ public class ServerConfig {
     this.profilingConfig = profilingConfig;
   }
 
+  /**
+   * Return the DB schema to use.
+   */
+  public String getDbSchema() {
+    return dbSchema;
+  }
+
+  /**
+   * Set the DB schema to use. This specifies to use this schema for:
+   * <ul>
+   * <li>Running Database migrations - Create and use the DB schema</li>
+   * <li>Testing DDL - Create-all.sql DDL execution creates and uses schema</li>
+   * <li>Testing Docker - Set default schema on connection URL</li>
+   * </ul>
+   */
+  public void setDbSchema(String dbSchema) {
+    this.dbSchema = dbSchema;
+  }
+
   /**
    * Return the DB migration configuration.
    */
@@ -1111,14 +1162,14 @@ public class ServerConfig {
    * Return the Geometry SRID.
    */
   public int getGeometrySRID() {
-    return dbTypeConfig.getGeometrySRID();
+    return platformConfig.getGeometrySRID();
   }
 
   /**
    * Set the Geometry SRID.
    */
   public void setGeometrySRID(int geometrySRID) {
-    dbTypeConfig.setGeometrySRID(geometrySRID);
+    platformConfig.setGeometrySRID(geometrySRID);
   }
 
   /**
@@ -1408,15 +1459,21 @@ public class ServerConfig {
    * Return true if all DB column and table names should use quoted identifiers.
    */
   public boolean isAllQuotedIdentifiers() {
-    return allQuotedIdentifiers;
+    return platformConfig.isAllQuotedIdentifiers();
   }
 
   /**
    * Set to true if all DB column and table names should use quoted identifiers.
    */
   public void setAllQuotedIdentifiers(boolean allQuotedIdentifiers) {
-    this.allQuotedIdentifiers = allQuotedIdentifiers;
-    if (allQuotedIdentifiers && namingConvention instanceof UnderscoreNamingConvention) {
+    platformConfig.setAllQuotedIdentifiers(allQuotedIdentifiers);
+    if (allQuotedIdentifiers) {
+      adjustNamingConventionForAllQuoted();
+    }
+  }
+
+  private void adjustNamingConventionForAllQuoted() {
+    if (namingConvention instanceof UnderscoreNamingConvention) {
       // we need to use matching naming convention
       this.namingConvention = new MatchingNamingConvention();
     }
@@ -1631,7 +1688,7 @@ public class ServerConfig {
    * </p>
    */
   public String getDatabaseBooleanTrue() {
-    return databaseBooleanTrue;
+    return platformConfig.getDatabaseBooleanTrue();
   }
 
   /**
@@ -1644,7 +1701,7 @@ public class ServerConfig {
    * </p>
    */
   public void setDatabaseBooleanTrue(String databaseTrue) {
-    this.databaseBooleanTrue = databaseTrue;
+    platformConfig.setDatabaseBooleanTrue(databaseTrue);
   }
 
   /**
@@ -1657,7 +1714,7 @@ public class ServerConfig {
    * </p>
    */
   public String getDatabaseBooleanFalse() {
-    return databaseBooleanFalse;
+    return platformConfig.getDatabaseBooleanFalse();
   }
 
   /**
@@ -1670,14 +1727,14 @@ public class ServerConfig {
    * </p>
    */
   public void setDatabaseBooleanFalse(String databaseFalse) {
-    this.databaseBooleanFalse = databaseFalse;
+    this.platformConfig.setDatabaseBooleanFalse(databaseFalse);
   }
 
   /**
    * Return the number of DB sequence values that should be preallocated.
    */
   public int getDatabaseSequenceBatchSize() {
-    return databaseSequenceBatchSize;
+    return platformConfig.getDatabaseSequenceBatchSize();
   }
 
   /**
@@ -1696,7 +1753,7 @@ public class ServerConfig {
    * </p>
    */
   public void setDatabaseSequenceBatch(int databaseSequenceBatchSize) {
-    this.databaseSequenceBatchSize = databaseSequenceBatchSize;
+    this.platformConfig.setDatabaseSequenceBatchSize(databaseSequenceBatchSize);
   }
 
   /**
@@ -1723,7 +1780,7 @@ public class ServerConfig {
    * that you don't have access to.
    * </p>
    * <p>
-   * Values are oracle, h2, postgres, mysql, mssqlserver2005.
+   * Values are oracle, h2, postgres, mysql, sqlserver16, sqlserver17.
    * </p>
    */
   public void setDatabasePlatformName(String databasePlatformName) {
@@ -1752,14 +1809,14 @@ public class ServerConfig {
    * Return the preferred DB platform IdType.
    */
   public IdType getIdType() {
-    return idType;
+    return platformConfig.getIdType();
   }
 
   /**
    * Set the preferred DB platform IdType.
    */
   public void setIdType(IdType idType) {
-    this.idType = idType;
+    this.platformConfig.setIdType(idType);
   }
 
   /**
@@ -1872,15 +1929,50 @@ public class ServerConfig {
   /**
    * Return the configuration for DB types (such as UUID and custom mappings).
    */
-  public DbTypeConfig getDbTypeConfig() {
-    return dbTypeConfig;
+  public PlatformConfig getPlatformConfig() {
+    return platformConfig;
+  }
+
+  /**
+   * Set the configuration for DB platform (such as UUID and custom mappings).
+   */
+  public void setPlatformConfig(PlatformConfig platformConfig) {
+    this.platformConfig = platformConfig;
   }
 
   /**
    * Set the DB type used to store UUID.
    */
-  public void setDbUuid(DbUuid dbUuid) {
-    this.dbTypeConfig.setDbUuid(dbUuid);
+  public void setDbUuid(PlatformConfig.DbUuid dbUuid) {
+    this.platformConfig.setDbUuid(dbUuid);
+  }
+
+  /**
+   * Returns the UUID version mode.
+   */
+  public UuidVersion getUuidVersion() {
+    return uuidVersion;
+  }
+
+  /**
+   * Sets the UUID version mode.
+   */
+  public void setUuidVersion(UuidVersion uuidVersion) {
+    this.uuidVersion = uuidVersion;
+  }
+
+  /**
+   * Return the UUID state file.
+   */
+  public String getUuidStateFile() {
+    return uuidStateFile;
+  }
+
+  /**
+   * Set the UUID state file.
+   */
+  public void setUuidStateFile(String uuidStateFile) {
+    this.uuidStateFile = uuidStateFile;
   }
 
   /**
@@ -1920,6 +2012,16 @@ public class ServerConfig {
     this.durationWithNanos = durationWithNanos;
   }
 
+  /**
+   * Set to true to run DB migrations on server start.
+   * <p>
+   * This is the same as serverConfig.getMigrationConfig().setRunMigration(). We have added this method here
+   * as it is often the only thing we need to configure for migrations.
+   */
+  public void setRunMigration(boolean runMigration) {
+    migrationConfig.setRunMigration(runMigration);
+  }
+
   /**
    * Set to true to generate the "create all" DDL on startup.
    * <p>
@@ -2308,7 +2410,7 @@ public class ServerConfig {
    * @param platform         Optionally specify the platform this mapping should apply to.
    */
   public void addCustomMapping(DbType type, String columnDefinition, Platform platform) {
-    dbTypeConfig.addCustomMapping(type, columnDefinition, platform);
+    platformConfig.addCustomMapping(type, columnDefinition, platform);
   }
 
   /**
@@ -2328,7 +2430,7 @@ public class ServerConfig {
    * @param columnDefinition The column definition that should be used
    */
   public void addCustomMapping(DbType type, String columnDefinition) {
-    dbTypeConfig.addCustomMapping(type, columnDefinition);
+    platformConfig.addCustomMapping(type, columnDefinition);
   }
 
   /**
@@ -2597,7 +2699,8 @@ public class ServerConfig {
    * Load settings from ebean.properties.
    */
   public void loadFromProperties() {
-    loadFromProperties(PropertiesLoader.load());
+    this.properties = PropertiesLoader.load();
+    configureFromProperties();
   }
 
   /**
@@ -2605,20 +2708,32 @@ public class ServerConfig {
    */
   public void loadFromProperties(Properties properties) {
     // keep the properties used for configuration so that these are available for plugins
-    this.properties = properties;
-    autoConfiguration();
-    PropertiesWrapper p = new PropertiesWrapper("ebean", name, properties);
-    loadSettings(p);
+    this.properties = PropertiesLoader.eval(properties);
+    configureFromProperties();
+  }
+
+  /**
+   * Load the settings from the given properties
+   */
+  private void configureFromProperties() {
+    List<AutoConfigure> autoConfigures = autoConfiguration();
+    loadSettings(new PropertiesWrapper("ebean", name, properties, classLoadConfig));
+    for (AutoConfigure autoConfigure : autoConfigures) {
+      autoConfigure.postConfigure(this);
+    }
   }
 
   /**
    * Use a 'plugin' to provide automatic configuration. Intended for automatic testing
    * configuration with Docker containers via ebean-test-config.
    */
-  private void autoConfiguration() {
+  private List<AutoConfigure> autoConfiguration() {
+    List<AutoConfigure> list = new ArrayList<>();
     for (AutoConfigure autoConfigure : serviceLoad(AutoConfigure.class)) {
-      autoConfigure.configure(this);
+      autoConfigure.preConfigure(this);
+      list.add(autoConfigure);
     }
+    return list;
   }
 
   /**
@@ -2642,34 +2757,6 @@ public class ServerConfig {
     return properties;
   }
 
-  /**
-   * Return the instance to use (can be null) for the given plugin.
-   *
-   * @param properties the properties
-   * @param pluginType the type of plugin
-   * @param key        properties key
-   * @param instance   existing instance
-   */
-  protected <T> T createInstance(PropertiesWrapper properties, Class<T> pluginType, String key, T instance) {
-
-    if (instance != null) {
-      return instance;
-    }
-    String classname = properties.get(key, null);
-    return createInstance(pluginType, classname);
-  }
-
-  /**
-   * Return the instance to use (can be null) for the given plugin.
-   *
-   * @param pluginType the type of plugin
-   * @param classname  the implementation class as per properties
-   */
-  @SuppressWarnings("unchecked")
-  protected <T> T createInstance(Class<T> pluginType, String classname) {
-    return classname == null ? null : (T) classLoadConfig.newInstance(classname);
-  }
-
   /**
    * loads the data source settings to preserve existing behaviour. IMHO, if someone has set the datasource config already,
    * they don't want the settings to be reloaded and reset. This allows a descending class to override this behaviour and prevent it
@@ -2679,6 +2766,7 @@ public class ServerConfig {
    */
   protected void loadDataSourceSettings(PropertiesWrapper p) {
     dataSourceConfig.loadSettings(p.properties, name);
+    readOnlyDataSourceConfig.loadSettings(p.properties, name);
   }
 
   /**
@@ -2700,13 +2788,15 @@ public class ServerConfig {
    */
   protected void loadSettings(PropertiesWrapper p) {
 
+    dbSchema = p.get("dbSchema", dbSchema);
+    if (dbSchema != null) {
+      migrationConfig.setDefaultDbSchema(dbSchema);
+    }
     profilingConfig.loadSettings(p, name);
     migrationConfig.loadSettings(p, name);
-
-    boolean quotedIdentifiers = p.getBoolean("allQuotedIdentifiers", allQuotedIdentifiers);
-    if (quotedIdentifiers != allQuotedIdentifiers) {
-      // potentially also set to use matching naming convention
-      setAllQuotedIdentifiers(quotedIdentifiers);
+    platformConfig.loadSettings(p);
+    if (platformConfig.isAllQuotedIdentifiers()) {
+      adjustNamingConventionForAllQuoted();
     }
     namingConvention = createNamingConvention(p, namingConvention);
     if (namingConvention != null) {
@@ -2727,11 +2817,6 @@ public class ServerConfig {
     }
     loadDocStoreSettings(p);
 
-    int srid = p.getInt("geometrySRID", 0);
-    if (srid > 0) {
-      dbTypeConfig.setGeometrySRID(srid);
-    }
-
     queryPlanTTLSeconds = p.getInt("queryPlanTTLSeconds", queryPlanTTLSeconds);
     slowQueryMillis = p.getLong("slowQueryMillis", slowQueryMillis);
     docStoreOnly = p.getBoolean("docStoreOnly", docStoreOnly);
@@ -2740,24 +2825,24 @@ public class ServerConfig {
     explicitTransactionBeginMode = p.getBoolean("explicitTransactionBeginMode", explicitTransactionBeginMode);
     autoCommitMode = p.getBoolean("autoCommitMode", autoCommitMode);
     useJtaTransactionManager = p.getBoolean("useJtaTransactionManager", useJtaTransactionManager);
+    useJavaxValidationNotNull = p.getBoolean("useJavaxValidationNotNull", useJavaxValidationNotNull);
     autoReadOnlyDataSource = p.getBoolean("autoReadOnlyDataSource", autoReadOnlyDataSource);
+    idGeneratorAutomatic = p.getBoolean("idGeneratorAutomatic", idGeneratorAutomatic);
 
     backgroundExecutorSchedulePoolSize = p.getInt("backgroundExecutorSchedulePoolSize", backgroundExecutorSchedulePoolSize);
     backgroundExecutorShutdownSecs = p.getInt("backgroundExecutorShutdownSecs", backgroundExecutorShutdownSecs);
     disableClasspathSearch = p.getBoolean("disableClasspathSearch", disableClasspathSearch);
-    currentUserProvider = createInstance(p, CurrentUserProvider.class, "currentUserProvider", currentUserProvider);
-    databasePlatform = createInstance(p, DatabasePlatform.class, "databasePlatform", databasePlatform);
-    encryptKeyManager = createInstance(p, EncryptKeyManager.class, "encryptKeyManager", encryptKeyManager);
-    encryptDeployManager = createInstance(p, EncryptDeployManager.class, "encryptDeployManager", encryptDeployManager);
-    encryptor = createInstance(p, Encryptor.class, "encryptor", encryptor);
-    dbEncrypt = createInstance(p, DbEncrypt.class, "dbEncrypt", dbEncrypt);
+    currentUserProvider = p.createInstance(CurrentUserProvider.class, "currentUserProvider", currentUserProvider);
+    databasePlatform = p.createInstance(DatabasePlatform.class, "databasePlatform", databasePlatform);
+    encryptKeyManager = p.createInstance(EncryptKeyManager.class, "encryptKeyManager", encryptKeyManager);
+    encryptDeployManager = p.createInstance(EncryptDeployManager.class, "encryptDeployManager", encryptDeployManager);
+    encryptor = p.createInstance(Encryptor.class, "encryptor", encryptor);
+    dbEncrypt = p.createInstance(DbEncrypt.class, "dbEncrypt", dbEncrypt);
     dbOffline = p.getBoolean("dbOffline", dbOffline);
-    serverCachePlugin = createInstance(p, ServerCachePlugin.class, "serverCachePlugin", serverCachePlugin);
+    serverCachePlugin = p.createInstance(ServerCachePlugin.class, "serverCachePlugin", serverCachePlugin);
 
-    if (packages != null) {
-      String packagesProp = p.get("search.packages", p.get("packages", null));
-      packages = getSearchJarsPackages(packagesProp);
-    }
+    String packagesProp = p.get("search.packages", p.get("packages", null));
+    packages = getSearchList(packagesProp, packages);
 
     collectQueryStatsByNode = p.getBoolean("collectQueryStatsByNode", collectQueryStatsByNode);
     collectQueryOrigins = p.getBoolean("collectQueryOrigins", collectQueryOrigins);
@@ -2773,7 +2858,6 @@ public class ServerConfig {
       throw new IllegalArgumentException("Property 'batch.mode' or 'persistBatching' is being set but no longer used. Please change to use 'persistBatchMode'");
     }
 
-    idType = p.getEnum(IdType.class, "idType", idType);
     persistBatch = p.getEnum(PersistBatch.class, "persistBatch", persistBatch);
     persistBatchOnCascade = p.getEnum(PersistBatch.class, "persistBatchOnCascade", persistBatchOnCascade);
 
@@ -2794,19 +2878,12 @@ public class ServerConfig {
     dataSourceJndiName = p.get("dataSourceJndiName", dataSourceJndiName);
     jdbcFetchSizeFindEach = p.getInt("jdbcFetchSizeFindEach", jdbcFetchSizeFindEach);
     jdbcFetchSizeFindList = p.getInt("jdbcFetchSizeFindList", jdbcFetchSizeFindList);
-    databaseSequenceBatchSize = p.getInt("databaseSequenceBatchSize", databaseSequenceBatchSize);
-    databaseBooleanTrue = p.get("databaseBooleanTrue", databaseBooleanTrue);
-    databaseBooleanFalse = p.get("databaseBooleanFalse", databaseBooleanFalse);
     databasePlatformName = p.get("databasePlatformName", databasePlatformName);
     defaultOrderById = p.getBoolean("defaultOrderById", defaultOrderById);
 
-    DbUuid dbUuid = p.getEnum(DbUuid.class, "dbuuid", null);
-    if (dbUuid != null) {
-      dbTypeConfig.setDbUuid(dbUuid);
-    }
-    if (p.getBoolean("uuidStoreAsBinary", false)) {
-      dbTypeConfig.setDbUuid(DbUuid.BINARY);
-    }
+    uuidVersion = p.getEnum(UuidVersion.class, "uuidVersion", uuidVersion);
+    uuidStateFile = p.get("uuidStateFile", uuidStateFile);
+
     localTimeWithNanos = p.getBoolean("localTimeWithNanos", localTimeWithNanos);
     jodaLocalTimeMode = p.get("jodaLocalTimeMode", jodaLocalTimeMode);
 
@@ -2827,12 +2904,30 @@ public class ServerConfig {
     ddlInitSql = p.get("ddl.initSql", ddlInitSql);
     ddlSeedSql = p.get("ddl.seedSql", ddlSeedSql);
 
+    // read tenant-configuration from config:
+    // tenant.mode = NONE | DB | SCHEMA | CATALOG | PARTITION
+    String mode = p.get("tenant.mode");
+    if (mode != null) {
+      for (TenantMode value : TenantMode.values()) {
+        if (value.name().equalsIgnoreCase(mode)) {
+          tenantMode = value;
+          break;
+        }
+      }
+    }
+
+    currentTenantProvider = p.createInstance(CurrentTenantProvider.class, "tenant.currentTenantProvider", currentTenantProvider);
+    tenantCatalogProvider = p.createInstance(TenantCatalogProvider.class, "tenant.catalogProvider", tenantCatalogProvider);
+    tenantSchemaProvider = p.createInstance(TenantSchemaProvider.class, "tenant.schemaProvider", tenantSchemaProvider);
+    tenantPartitionColumn = p.get("tenant.partitionColumn", tenantPartitionColumn);
     classes = getClasses(p);
+
+    String mappingsProp = p.get("mappingLocations", null);
+    mappingLocations = getSearchList(mappingsProp, mappingLocations);
   }
 
   private NamingConvention createNamingConvention(PropertiesWrapper properties, NamingConvention namingConvention) {
-
-    NamingConvention nc = createInstance(properties, NamingConvention.class, "namingconvention", null);
+    NamingConvention nc = properties.createInstance(NamingConvention.class, "namingConvention", null);
     return (nc != null) ? nc : namingConvention;
   }
 
@@ -2865,17 +2960,17 @@ public class ServerConfig {
     return classes;
   }
 
-  private List<String> getSearchJarsPackages(String searchPackages) {
+  private List<String> getSearchList(String searchNames, List<String> defaultValue) {
 
-    if (searchPackages != null) {
-      String[] entries = StringHelper.splitNames(searchPackages);
+    if (searchNames != null) {
+      String[] entries = StringHelper.splitNames(searchNames);
 
       List<String> hitList = new ArrayList<>(entries.length);
       Collections.addAll(hitList, entries);
 
       return hitList;
     } else {
-      return new ArrayList<>();
+      return defaultValue;
     }
   }
 
@@ -2959,6 +3054,25 @@ public class ServerConfig {
     this.disableL2Cache = disableL2Cache;
   }
 
+  /**
+   * Returns if we use javax.validation.constraints.NotNull
+   */
+  public boolean isUseJavaxValidationNotNull() {
+    return useJavaxValidationNotNull;
+  }
+
+  /**
+   * Controls if Ebean should ignore <code>&x64;javax.validation.contstraints.NotNull</code>
+   * with respect to generating a <code>NOT NULL</code> column.
+   * <p>
+   * Normally when Ebean sees javax NotNull annotation it means that column is defined as NOT NULL.
+   * Set this to <code>false</code> and the javax NotNull annotation is effectively ignored (and
+   * we instead use Ebean's own NotNull annotation or JPA Column(nullable=false) annotation.
+   */
+  public void setUseJavaxValidationNotNull(boolean useJavaxValidationNotNull) {
+    this.useJavaxValidationNotNull = useJavaxValidationNotNull;
+  }
+
   /**
    * Return true if L2 cache notification should run in the foreground.
    */
@@ -3004,50 +3118,73 @@ public class ServerConfig {
   }
 
   /**
-   * Specify how UUID is stored.
+   * Create a new PlatformConfig based of the one held but with overridden properties by reading
+   * properties with the given path and prefix.
+   * <p>
+   * Typically used in Db Migration generation for many platform targets that might have different
+   * configuration for IdType, UUID, quoted identifiers etc.
+   * </p>
+   *
+   * @param propertiesPath The properties path used for loading and setting properties
+   * @param platformPrefix The prefix used for loading and setting properties
+   * @return A copy of the PlatformConfig with overridden properties
    */
-  public enum DbUuid {
+  public PlatformConfig newPlatformConfig(String propertiesPath, String platformPrefix) {
 
-    /**
-     * Store using native UUID in H2 and Postgres and otherwise fallback to VARCHAR(40).
-     */
-    AUTO_VARCHAR(true, false),
+    PropertiesWrapper p = new PropertiesWrapper(propertiesPath, platformPrefix, properties, classLoadConfig);
 
-    /**
-     * Store using native UUID in H2 and Postgres and otherwise fallback to BINARY(16).
-     */
-    AUTO_BINARY(true, true),
+    PlatformConfig config = new PlatformConfig(platformConfig);
+    config.loadSettings(p);
+    return config;
+  }
 
-    /**
-     * Store using DB VARCHAR(40).
-     */
-    VARCHAR(false, false),
-
-    /**
-     * Store using DB BINARY(16).
-     */
-    BINARY(false, true);
-
-    boolean nativeType;
-    boolean binary;
-
-    DbUuid(boolean nativeType, boolean binary) {
-      this.nativeType = nativeType;
-      this.binary = binary;
+  /**
+   * Add a mapping location to search for xml mapping via class path search.
+   */
+  public void addMappingLocation(String mappingLocation) {
+    if (mappingLocations == null) {
+      mappingLocations = new ArrayList<>();
     }
+    mappingLocations.add(mappingLocation);
+  }
 
-    /**
-     * Return true if native UUID type is preferred.
-     */
-    public boolean useNativeType() {
-      return nativeType;
-    }
+  /**
+   * Return mapping locations to search for xml mapping via class path search.
+   */
+  public List<String> getMappingLocations() {
+    return mappingLocations;
+  }
 
-    /**
-     * Return true if BINARY(16) storage is preferred over VARCHAR(40).
-     */
-    public boolean useBinary() {
-      return binary;
-    }
+  /**
+   * Set mapping locations to search for xml mapping via class path search.
+   * <p>
+   * This is only used if classes have not been explicitly specified.
+   * </p>
+   */
+  public void setMappingLocations(List<String> mappingLocations) {
+    this.mappingLocations = mappingLocations;
+  }
+
+  /**
+   * When false we need explicit <code>@GeneratedValue</code> mapping to assign
+   * Identity or Sequence generated values. When true Id properties are automatically
+   * assigned Identity or Sequence without the GeneratedValue mapping.
+   */
+  public boolean isIdGeneratorAutomatic() {
+    return idGeneratorAutomatic;
+  }
+
+  /**
+   * Set to false such that Id properties require explicit <code>@GeneratedValue</code>
+   * mapping before they are assigned Identity or Sequence generation based on platform.
+   */
+  public void setIdGeneratorAutomatic(boolean idGeneratorAutomatic) {
+    this.idGeneratorAutomatic = idGeneratorAutomatic;
+  }
+
+  public enum UuidVersion {
+    VERSION4,
+    VERSION1,
+    VERSION1RND
   }
 }

src/main/java/io/ebean/config/ServerConfigProvider.java

@@ -0,0 +1,39 @@
+package io.ebean.config;
+
+/**
+ * Provides a ServiceLoader based mechanism to configure a ServerConfig.
+ * <p>
+ * Provide an implementation and register it via the standard Java ServiceLoader mechanism
+ * via a file at <code>META-INF/services/io.ebean.config.ServerConfigProvider</code>.
+ * </p>
+ * <p>
+ * If you are using a DI container like Spring or Guice you are unlikely to use this but instead use a
+ * spring specific configuration.  When we are not using a DI container we may use this mechanism to
+ * explicitly register the entity beans and avoid classpath scanning.
+ * </p>
+ * <pre>{@code
+ *
+ * public class EbeanConfigProvider implements ServerConfigProvider {
+ *
+ *   @Override
+ *   public void apply(ServerConfig config) {
+ *
+ *     // register the entity bean classes explicitly
+ *     config.addClass(Customer.class);
+ *     config.addClass(User.class);
+ *     ...
+ *   }
+ * }
+ *
+ * }</pre>
+ */
+public interface ServerConfigProvider {
+
+  /**
+   * Apply the configuration to the ServerConfig.
+   * <p>
+   * Typically we explicitly register entity bean classes and thus avoid classpath scanning.
+   * </p>
+   */
+  void apply(ServerConfig config);
+}

src/main/java/io/ebean/config/TenantMode.java

@@ -8,32 +8,40 @@ public enum TenantMode {
   /**
    * No multi-tenancy.
    */
-  NONE(false),
+  NONE(false, true),
 
   /**
    * Each Tenant has their own Database (javax.sql.DataSource)
    */
-  DB(true),
+  DB(true, false),
 
   /**
    * Each Tenant has their own Database schema.
    */
-  SCHEMA(true),
+  SCHEMA(true, false),
 
   /**
    * Each Tenant has their own Database but with in connection pool
    */
-  CATALOG(true),
+  CATALOG(true, false),
 
   /**
    * Tenants share tables but have a discriminator/partition column that partitions the data.
    */
-  PARTITION(false);
+  PARTITION(false, true),
 
+  /**
+   * Each Tenant has their own Database (javax.sql.DataSource), and there is also one master-database
+   * (that holds configuration e.g.)
+   */
+  DB_WITH_MASTER(true, true);
+  
   boolean dynamicDataSource;
+  boolean ddlEnabled;
 
-  TenantMode(boolean dynamicDataSource) {
+  TenantMode(boolean dynamicDataSource, boolean ddlEnabled) {
     this.dynamicDataSource = dynamicDataSource;
+    this.ddlEnabled = ddlEnabled;
   }
 
   /**
@@ -42,4 +50,12 @@ public enum TenantMode {
   public boolean isDynamicDataSource() {
     return dynamicDataSource;
   }
+  
+  /**
+   * Returns true, if DDL is enabled.
+   */
+  public boolean isDdlEnabled() {
+    return ddlEnabled;
+  }
+ 
 }

src/main/java/io/ebean/config/UnderscoreNamingConvention.java

@@ -112,39 +112,7 @@ public class UnderscoreNamingConvention extends AbstractNamingConvention {
    * Convert and return the string to underscore from camel case.
    */
   protected String toUnderscoreFromCamel(String camelCase) {
-
-    int lastUpper = -1;
-    StringBuilder sb = new StringBuilder(camelCase.length() + 4);
-    for (int i = 0; i < camelCase.length(); i++) {
-      char c = camelCase.charAt(i);
-
-      if ('_' == c) {
-        // Underscores should just be passed through
-        sb.append(c);
-        lastUpper = i;
-      } else if (Character.isDigit(c)) {
-        if (i > lastUpper + 1 && !digitsCompressed) {
-          sb.append("_");
-        }
-        sb.append(c);
-        lastUpper = i;
-
-      } else if (Character.isUpperCase(c)) {
-        if (i > lastUpper + 1) {
-          sb.append("_");
-        }
-        sb.append(Character.toLowerCase(c));
-        lastUpper = i;
-
-      } else {
-        sb.append(c);
-      }
-    }
-    String ret = sb.toString();
-    if (forceUpperCase) {
-      ret = ret.toUpperCase();
-    }
-    return ret;
+    return CamelCaseHelper.toUnderscoreFromCamel(camelCase, digitsCompressed, forceUpperCase);
   }
 
   /**

src/main/java/io/ebean/config/dbplatform/DatabasePlatform.java

@@ -5,8 +5,7 @@ import io.ebean.Query;
 import io.ebean.annotation.PersistBatch;
 import io.ebean.annotation.Platform;
 import io.ebean.config.CustomDbTypeMapping;
-import io.ebean.config.DbTypeConfig;
-import io.ebean.config.ServerConfig;
+import io.ebean.config.PlatformConfig;
 import io.ebean.util.JdbcClose;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -17,6 +16,7 @@ import java.sql.Connection;
 import java.sql.DatabaseMetaData;
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.sql.Statement;
 import java.sql.Types;
 
 /**
@@ -215,16 +215,16 @@ public class DatabasePlatform {
   /**
    * Configure the platform given the server configuration.
    */
-  public void configure(ServerConfig config) {
+  public void configure(PlatformConfig config) {
     this.sequenceBatchSize = config.getDatabaseSequenceBatchSize();
     configureIdType(config.getIdType());
-    configure(config.getDbTypeConfig(), config.isAllQuotedIdentifiers());
+    configure(config, config.isAllQuotedIdentifiers());
   }
 
   /**
    * Configure UUID Storage etc based on ServerConfig settings.
    */
-  protected void configure(DbTypeConfig config, boolean allQuotedIdentifiers) {
+  protected void configure(PlatformConfig config, boolean allQuotedIdentifiers) {
     this.allQuotedIdentifiers = allQuotedIdentifiers;
     addGeoTypes(config.getGeometrySRID());
     configureIdType(config.getIdType());
@@ -382,6 +382,13 @@ public class DatabasePlatform {
     this.historySupport = historySupport;
   }
 
+  /**
+   * So no except for Postgres and CockroachDB.
+   */
+  public boolean isNativeArrayType() {
+    return false;
+  }
+
   /**
    * Return true if the DB supports native UUID.
    */
@@ -518,6 +525,13 @@ public class DatabasePlatform {
     this.forwardOnlyHintOnFindIterate = forwardOnlyHintOnFindIterate;
   }
 
+  /**
+   * Normally not needed - overridden in CockroachPlatform.
+   */
+  public boolean isDdlCommitOnCreateIndex() {
+    return false;
+  }
+
   /**
    * Return the DB identity/sequence features for this platform.
    *
@@ -645,6 +659,39 @@ public class DatabasePlatform {
     return persistBatchOnCascade;
   }
 
+  /**
+   * Create the DB schema if it does not exist.
+   */
+  public void createSchemaIfNotExists(String dbSchema, Connection connection) throws SQLException {
+    if (!schemaExists(dbSchema, connection)) {
+      Statement query = connection.createStatement();
+      try {
+        logger.info("create schema:{}", dbSchema);
+        query.executeUpdate("create schema " + dbSchema);
+      } finally {
+        JdbcClose.close(query);
+      }
+    }
+  }
+
+  /**
+   * Return true if the schema exists.
+   */
+  public boolean schemaExists(String dbSchema, Connection connection) throws SQLException {
+    ResultSet schemas = connection.getMetaData().getSchemas();
+    try {
+      while (schemas.next()) {
+        String schema = schemas.getString(1);
+        if (schema.equalsIgnoreCase(dbSchema)) {
+          return true;
+        }
+      }
+    } finally {
+      JdbcClose.close(schemas);
+    }
+    return false;
+  }
+
   /**
    * Return true if the table exists.
    */

src/main/java/io/ebean/config/dbplatform/DbPlatformTypeMapping.java

@@ -1,6 +1,6 @@
 package io.ebean.config.dbplatform;
 
-import io.ebean.config.ServerConfig;
+import io.ebean.config.PlatformConfig;
 
 import java.util.EnumMap;
 import java.util.Map;
@@ -119,8 +119,8 @@ public class DbPlatformTypeMapping {
       put(DbType.JSONCLOB, JSON_CLOB_PLACEHOLDER);
       put(DbType.JSONBLOB, JSON_BLOB_PLACEHOLDER);
       put(DbType.JSONVARCHAR, JSON_VARCHAR_PLACEHOLDER);
-      // use reasonable default of varchar(40) - ideally set via DatabasePlatform.configure(DbTypeConfig)
-      put(DbType.UUID, get(DbType.VARCHAR).withLength(40));
+      // default to native UUID and override on platform configure()
+      put(DbType.UUID, UUID_NATIVE);
     }
   }
 
@@ -198,9 +198,9 @@ public class DbPlatformTypeMapping {
   /**
    * Map the UUID appropriately based on native DB support and ServerConfig.DbUuid.
    */
-  public void config(boolean nativeUuidType, ServerConfig.DbUuid dbUuid) {
+  public void config(boolean nativeUuidType, PlatformConfig.DbUuid dbUuid) {
     if (nativeUuidType && dbUuid.useNativeType()) {
-      put(DbType.UUID, UUID_NATIVE);
+      // native UUID already set by default
     } else if (dbUuid.useBinary()) {
       put(DbType.UUID, get(DbType.BINARY).withLength(16));
     } else {

src/main/java/io/ebean/config/dbplatform/cockroach/CockroachPlatform.java

@@ -0,0 +1,28 @@
+package io.ebean.config.dbplatform.cockroach;
+
+import io.ebean.annotation.Platform;
+import io.ebean.config.dbplatform.postgres.PostgresPlatform;
+
+/**
+ * CockroachDB based platform.
+ */
+public class CockroachPlatform extends PostgresPlatform {
+
+  public CockroachPlatform() {
+    super();
+    this.platform = Platform.COCKROACH;
+    // no like escape clause supported
+    this.likeSpecialCharacters = new char[]{'%', '_'};
+    this.likeClauseRaw = "like ?";
+    this.likeClauseEscaped = "like ?";
+  }
+
+  /**
+   * Needs a commit after create index such that alter table add foreign key ... succeeds.
+   */
+  @Override
+  public boolean isDdlCommitOnCreateIndex() {
+    return true;
+  }
+
+}

src/main/java/io/ebean/config/dbplatform/postgres/PostgresPlatform.java

@@ -88,6 +88,14 @@ public class PostgresPlatform extends DatabasePlatform {
     return new DbPlatformType("geometry(" + type + "," + srid + ")");
   }
 
+  /**
+   * So we can generate varchar[], int[], uuid[] column definitions and use the associated scalar types.
+   */
+  @Override
+  public boolean isNativeArrayType() {
+    return true;
+  }
+
   /**
    * Create a Postgres specific sequence IdGenerator.
    */

src/main/java/io/ebean/config/dbplatform/sqlserver/SqlServer16Platform.java

@@ -0,0 +1,26 @@
+package io.ebean.config.dbplatform.sqlserver;
+
+import io.ebean.annotation.Platform;
+import io.ebean.config.dbplatform.DbPlatformType;
+import io.ebean.config.dbplatform.DbType;
+import io.ebean.config.dbplatform.IdType;
+
+/**
+ * Microsoft SQL Server platform that has non-UTF8 types (char, varchar, text) and default to Identity rather than Sequence.
+ */
+public class SqlServer16Platform extends SqlServerBasePlatform {
+
+  public SqlServer16Platform() {
+    super();
+    this.platform = Platform.SQLSERVER16;
+    // default to use Identity rather than sequences
+    this.dbIdentity.setIdType(IdType.IDENTITY);
+
+    // non-utf8 column types
+    dbTypeMap.put(DbType.CHAR, new DbPlatformType("char", 1));
+    dbTypeMap.put(DbType.VARCHAR, new DbPlatformType("varchar", 255));
+    dbTypeMap.put(DbType.LONGVARCHAR, new DbPlatformType("text"));
+    dbTypeMap.put(DbType.CLOB, new DbPlatformType("text"));
+  }
+
+}

src/main/java/io/ebean/config/dbplatform/sqlserver/SqlServer17Platform.java

@@ -0,0 +1,20 @@
+package io.ebean.config.dbplatform.sqlserver;
+
+import io.ebean.annotation.Platform;
+import io.ebean.config.dbplatform.DbPlatformType;
+import io.ebean.config.dbplatform.DbType;
+
+/**
+ * Microsoft SQL Server platform - NVarchar UTF types and Sequence preference.
+ */
+public class SqlServer17Platform extends SqlServerBasePlatform {
+
+  public SqlServer17Platform() {
+    super();
+    this.platform = Platform.SQLSERVER17;
+    this.columnAliasPrefix = null;
+    this.nativeUuidType = true;
+    this.dbTypeMap.put(DbType.UUID, new DbPlatformType("uniqueidentifier", false));
+  }
+
+}

src/main/java/io/ebean/config/dbplatform/sqlserver/SqlServer2005Platform.java

@@ -3,7 +3,7 @@ package io.ebean.config.dbplatform.sqlserver;
 /**
  * SQL Server platform using the older ROW_NUMBER() mechanism.
  */
-public class SqlServer2005Platform extends SqlServerPlatform {
+public class SqlServer2005Platform extends SqlServer16Platform {
 
   public SqlServer2005Platform() {
     this.sqlLimiter = new SqlServer2005SqlLimiter();

src/main/java/io/ebean/config/dbplatform/sqlserver/SqlServerBasePlatform.java

@@ -4,7 +4,7 @@ import io.ebean.BackgroundExecutor;
 import io.ebean.Query;
 import io.ebean.annotation.PersistBatch;
 import io.ebean.annotation.Platform;
-import io.ebean.config.ServerConfig;
+import io.ebean.config.PlatformConfig;
 import io.ebean.config.dbplatform.DatabasePlatform;
 import io.ebean.config.dbplatform.DbPlatformType;
 import io.ebean.config.dbplatform.DbType;
@@ -16,11 +16,11 @@ import javax.sql.DataSource;
 import java.sql.Types;
 
 /**
- * Microsoft SQL Server platform.
+ * Base Microsoft SQL Server platform - NVarchar UTF types and Sequence preference by default.
  */
-public class SqlServerPlatform extends DatabasePlatform {
+abstract class SqlServerBasePlatform extends DatabasePlatform {
 
-  public SqlServerPlatform() {
+  SqlServerBasePlatform() {
     super();
     this.platform = Platform.SQLSERVER;
     // disable persistBatchOnCascade mode for
@@ -31,7 +31,7 @@ public class SqlServerPlatform extends DatabasePlatform {
     this.sqlLimiter = new SqlServerSqlLimiter();
     this.basicSqlLimiter = new SqlServerBasicSqlLimiter();
     this.historySupport = new SqlServerHistorySupport();
-    this.dbIdentity.setIdType(IdType.IDENTITY);
+    this.dbIdentity.setIdType(IdType.SEQUENCE);
     this.dbIdentity.setSupportsGetGeneratedKeys(true);
     this.dbIdentity.setSupportsIdentity(true);
     this.dbIdentity.setSupportsSequence(true);
@@ -63,22 +63,26 @@ public class SqlServerPlatform extends DatabasePlatform {
     dbTypeMap.put(DbType.TINYINT, new DbPlatformType("smallint"));
     dbTypeMap.put(DbType.DECIMAL, new DbPlatformType("numeric", 28));
 
-    dbTypeMap.put(DbType.BLOB, new DbPlatformType("image"));
-    dbTypeMap.put(DbType.CLOB, new DbPlatformType("text"));
-    dbTypeMap.put(DbType.LONGVARBINARY, new DbPlatformType("image"));
-    dbTypeMap.put(DbType.LONGVARCHAR, new DbPlatformType("text"));
 
     dbTypeMap.put(DbType.DATE, new DbPlatformType("date"));
     dbTypeMap.put(DbType.TIME, new DbPlatformType("time"));
     dbTypeMap.put(DbType.TIMESTAMP, new DbPlatformType("datetime2"));
 
+    // UTF8 aware types - overwritten in SqlServer16 platform
+    dbTypeMap.put(DbType.CHAR, new DbPlatformType("nchar", 1));
+    dbTypeMap.put(DbType.VARCHAR, new DbPlatformType("nvarchar", 255));
+    dbTypeMap.put(DbType.LONGVARCHAR, new DbPlatformType("nvarchar", Integer.MAX_VALUE));
+    dbTypeMap.put(DbType.CLOB, new DbPlatformType("nvarchar", Integer.MAX_VALUE));
+
     dbTypeMap.put(DbType.JSON, new DbPlatformType("nvarchar", Integer.MAX_VALUE));
     dbTypeMap.put(DbType.JSONB, new DbPlatformType("nvarchar", Integer.MAX_VALUE));
 
+    dbTypeMap.put(DbType.BLOB, new DbPlatformType("image"));
+    dbTypeMap.put(DbType.LONGVARBINARY, new DbPlatformType("image"));
   }
 
   @Override
-  public void configure(ServerConfig config) {
+  public void configure(PlatformConfig config) {
     super.configure(config);
     if (dbIdentity.getIdType() == IdType.SEQUENCE) {
       this.persistBatchOnCascade = PersistBatch.ALL;

src/main/java/io/ebean/config/properties/LoadContext.java

@@ -18,26 +18,26 @@ import java.util.Set;
  */
 class LoadContext {
 
-	private static final Logger log = LoggerFactory.getLogger(LoadContext.class);
+  private static final Logger log = LoggerFactory.getLogger(LoadContext.class);
 
   /**
    * Map we are loading the properties into.
    */
-	private final Map<String, String> map = new LinkedHashMap<>();
+  private final Map<String, String> map = new LinkedHashMap<>();
 
   /**
    * Names of resources/files that were loaded.
    */
-	private final Set<String> loadedResources = new LinkedHashSet<>();
+  private final Set<String> loadedResources = new LinkedHashSet<>();
 
   /**
    * Return the input stream (maybe null) for the given source.
    */
-	InputStream resource(String resourcePath, Loader.Source source) {
+  InputStream resource(String resourcePath, Loader.Source source) {
 
     InputStream is = null;
     if (source == Loader.Source.RESOURCE) {
-      is = getClass().getResourceAsStream("/" + resourcePath);
+      is = resourceStream(resourcePath);
       if (is != null) {
         loadedResources.add(resourcePath);
       }
@@ -46,43 +46,52 @@ class LoadContext {
       if (file.exists()) {
         try {
           is = new FileInputStream(file);
-          loadedResources.add("file:"+resourcePath);
+          loadedResources.add("file:" + resourcePath);
         } catch (FileNotFoundException e) {
           throw new IllegalStateException(e);
         }
       }
     }
 
-		return is;
-	}
+    return is;
+  }
+
+  private InputStream resourceStream(String resourcePath) {
+    InputStream is = getClass().getResourceAsStream("/" + resourcePath);
+    if (is == null) {
+      // search the module path for top level resource
+      is = ClassLoader.getSystemResourceAsStream(resourcePath);
+    }
+    return is;
+  }
 
   /**
    * Add a property entry.
    */
-	void put(String key, String val) {
-	  if (val != null) {
-	    val = val.trim();
+  void put(String key, String val) {
+    if (val != null) {
+      val = val.trim();
     }
-		map.put(key, val);
-	}
+    map.put(key, val);
+  }
 
   /**
    * Evaluate all the expressions and return as a Properties object.
    */
-	Properties eval() {
+  Properties eval() {
 
-		log.info("loaded properties from {}", loadedResources);
+    log.info("loaded properties from {}", loadedResources);
 
-		Properties properties = new Properties();
+    Properties properties = new Properties();
 
-		for (Map.Entry<String, String> entry : map.entrySet()) {
-			String key = entry.getKey();
-			String value = PropertyEval.eval(entry.getValue());
-			properties.setProperty(key, value);
-		}
+    for (Map.Entry<String, String> entry : map.entrySet()) {
+      String key = entry.getKey();
+      String value = PropertyEval.eval(entry.getValue());
+      properties.setProperty(key, value);
+    }
 
-		return properties;
-	}
+    return properties;
+  }
 
   /**
    * Read the special properties that can point to an external properties source.

src/main/java/io/ebean/config/properties/Loader.java

@@ -16,10 +16,10 @@ import java.util.Properties;
  */
 class Loader {
 
-	private static final Logger log = LoggerFactory.getLogger(Loader.class);
+  private static final Logger log = LoggerFactory.getLogger(Loader.class);
 
-	enum Source {
-	  RESOURCE,
+  enum Source {
+    RESOURCE,
     FILE
   }
 
@@ -27,34 +27,36 @@ class Loader {
 
   private YamlLoader yamlLoader;
 
-	Loader() {
-
-		try {
-			Class<?> exists = Class.forName("org.yaml.snakeyaml.Yaml");
-			if (exists != null) {
-				yamlLoader = new YamlLoader(loadContext);
-			}
-		} catch (Exception e) {
-			// ignored
-		}
-	}
+  Loader() {
+    String skipYaml = System.getProperty("ebeanSkipYaml");
+    if (!"true".equals(skipYaml)) {
+      try {
+        Class<?> exists = Class.forName("org.yaml.snakeyaml.Yaml");
+        if (exists != null) {
+          yamlLoader = new YamlLoader(loadContext);
+        }
+      } catch (Exception e) {
+        // ignored
+      }
+    }
+  }
 
   /**
    * Load the configuration with the expected ordering.
    */
-	void load() {
+  void load() {
 
     loadMain(Source.RESOURCE);
     // external file configuration overrides the resources configuration
     loadMain(Source.FILE);
 
-		loadViaSystemProperty();
-		loadViaIndirection();
+    loadViaSystemProperty();
+    loadViaIndirection();
 
-		// test configuration (if found) overrides main configuration
+    // test configuration (if found) overrides main configuration
     // we should only find these resources when running tests
-		loadTest();
-	}
+    loadTest();
+  }
 
   /**
    * Load test configuration.
@@ -87,7 +89,7 @@ class Loader {
   }
 
   private void loadViaSystemProperty() {
-	  String fileName = System.getenv("EBEAN_PROPS_FILE");
+    String fileName = System.getenv("EBEAN_PROPS_FILE");
     if (fileName == null) {
       fileName = System.getProperty("ebean.props.file");
       if (fileName != null) {
@@ -110,55 +112,66 @@ class Loader {
    * Evaluate all the configuration entries and return as properties.
    */
   Properties eval() {
-		return loadContext.eval();
-	}
+    return loadContext.eval();
+  }
 
-	void loadYaml(String resourcePath, Source source) {
-		if (yamlLoader != null) {
-			yamlLoader.load(resource(resourcePath, source));
-		}
-	}
+  void loadYaml(String resourcePath, Source source) {
+    if (yamlLoader != null) {
+      try {
+        try (InputStream is = resource(resourcePath, source)) {
+          yamlLoader.load(is);
+        }
+      } catch (Exception e) {
+        log.warn("Failed to read yml from:" + resourcePath, e);
+      }
+    }
+  }
 
-	void loadProperties(String resourcePath, Source source) {
-		InputStream is = resource(resourcePath, source);
-		if (is != null) {
-			loadProperties(is);
-		}
-	}
+  void loadProperties(String resourcePath, Source source) {
+    try {
+      try (InputStream is = resource(resourcePath, source)) {
+        if (is != null) {
+          loadProperties(is);
+        }
+      }
+    } catch (Exception e) {
+      log.warn("Failed to read properties from:" + resourcePath, e);
+    }
+  }
 
-	private InputStream resource(String resourcePath, Source source) {
-		return loadContext.resource(resourcePath, source);
-	}
+  private InputStream resource(String resourcePath, Source source) {
+    return loadContext.resource(resourcePath, source);
+  }
 
-	private void loadProperties(InputStream is) {
+  private void loadProperties(InputStream is) {
 
-		if (is != null) {
-			try {
-				Properties properties = new Properties();
-				properties.load(is);
-				put(properties);
-			} catch (IOException e) {
-				throw new RuntimeException("Failed to load properties?", e);
-			} finally {
-				close(is);
-			}
-		}
-	}
+    if (is != null) {
+      try {
+        Properties properties = new Properties();
+        properties.load(is);
+        put(properties);
+      } catch (IOException e) {
+        throw new RuntimeException("Failed to load properties?", e);
+      } finally {
+        close(is);
+      }
+    }
+  }
 
-	private void put(Properties properties) {
-		Enumeration<?> enumeration = properties.propertyNames();
-		while (enumeration.hasMoreElements()) {
-			String key = (String) enumeration.nextElement();
-			String property = properties.getProperty(key);
-			loadContext.put(key, property);
-		}
-	}
+  private void put(Properties properties) {
+    Enumeration<?> enumeration = properties.propertyNames();
+    while (enumeration.hasMoreElements()) {
+      String key = (String) enumeration.nextElement();
+      String property = properties.getProperty(key);
+      loadContext.put(key, property);
+    }
+  }
 
-	private void close(InputStream is) {
-		try {
-			is.close();
-		} catch (IOException e) {
-			log.warn("Error closing input stream for properties", e);
-		}
-	}
+  private void close(InputStream is) {
+    try {
+      is.close();
+    } catch (IOException e) {
+      log.warn("Error closing input stream for properties", e);
+    }
+  }
 }

src/main/java/io/ebean/config/properties/PropertiesLoader.java

@@ -1,5 +1,6 @@
 package io.ebean.config.properties;
 
+import java.util.Enumeration;
 import java.util.Properties;
 
 /**
@@ -56,14 +57,18 @@ public class PropertiesLoader {
   }
 
   /**
-   * Set (override) a configuration property.
-   *
-   * This is expected to be only called by test configuration logic
-   * (ala automatic test configuration via ebean-test-config).
+   * Return a copy of the properties with 'eval' run on all the values.
+   * This resolves expressions like ${HOME} etc.
    */
-  public static synchronized void setProperty(String key, String value) {
-    load();
-    properties.setProperty(key, value);
-  }
+  public static Properties eval(Properties properties) {
+    Properties evalCopy = new Properties();
 
+    Enumeration<?> names = properties.propertyNames();
+    while (names.hasMoreElements()) {
+      String name = (String)names.nextElement();
+      String value = PropertyEval.eval(properties.getProperty(name));
+      evalCopy.setProperty(name, value);
+    }
+    return evalCopy;
+  }
 }

src/main/java/io/ebean/config/properties/YamlLoader.java

@@ -21,9 +21,12 @@ class YamlLoader {
     this.loadContext = loadContext;
   }
 
+  @SuppressWarnings("unchecked")
   void load(InputStream is) {
     if (is != null) {
-      loadMap(yaml.load(is), null);
+      for (Object map : yaml.loadAll(is)) {
+        loadMap((Map<String, Object>)map, null);
+      }
     }
   }
 

src/main/java/io/ebean/dbmigration/DbMigration.java

@@ -93,6 +93,38 @@ public interface DbMigration {
    */
   void setStrictMode(boolean strictMode);
 
+  /**
+   * Set to true to include a generated header comment in the DDL script.
+   */
+  void setIncludeGeneratedFileComment(boolean includeGeneratedFileComment);
+
+  /**
+   * Set the header that is included in the generated DDL script.
+   */
+  void setHeader(String header);
+
+  /**
+   * Set the prefix for the version. Set this to "V" for use with Flyway.
+   */
+  void setApplyPrefix(String applyPrefix);
+
+  /**
+   * Set the version of the migration to be generated.
+   */
+  void setVersion(String version);
+
+  /**
+   * Set the name of the migration to be generated.
+   */
+  void setName(String name);
+
+  /**
+   * Generate a migration for the version specified that contains pending drops.
+   *
+   * @param generatePendingDrop The version of a prior migration that holds pending drops.
+   */
+  void setGeneratePendingDrop(String generatePendingDrop);
+
   /**
    * Add an additional platform to write the migration DDL.
    * <p>

src/main/java/io/ebean/event/ServletContextListener.java

@@ -0,0 +1,38 @@
+package io.ebean.event;
+
+import io.ebeaninternal.server.lib.ShutdownManager;
+
+import javax.servlet.ServletContextEvent;
+
+/**
+ * Listens for webserver server starting and stopping events.
+ * <p>
+ * This should be used when the deployment is into a servlet container where the webapp
+ * can be shutdown or redeployed without the JVM stopping.
+ * </p>
+ * <p>
+ * If deployment is into a container where the JVM is completely shutdown (like spring boot,
+ * runnable war or when using a servlet container that only contains the single webapp and
+ * the JVM is shutdown then this isn't required. Instead we can just rely on the JVM shutdown
+ * hook that Ebean registers.
+ * </p>
+ */
+public class ServletContextListener implements javax.servlet.ServletContextListener {
+
+  /**
+   * The servlet container is stopping.
+   */
+  @Override
+  public void contextDestroyed(ServletContextEvent event) {
+    ShutdownManager.shutdown();
+  }
+
+  /**
+   * Do nothing on startup.
+   */
+  @Override
+  public void contextInitialized(ServletContextEvent event) {
+
+  }
+
+}

src/main/java/io/ebean/meta/AbstractMetricVisitor.java

@@ -0,0 +1,43 @@
+package io.ebean.meta;
+
+/**
+ * An abstract MetricVisitor that handles the boolean flags - reset, collectTransactionMetrics and collectQueryMetrics.
+ */
+public abstract class AbstractMetricVisitor implements MetricVisitor {
+
+  private final boolean reset;
+  private final boolean collectTransactionMetrics;
+  private final boolean collectQueryMetrics;
+
+  public AbstractMetricVisitor(boolean reset, boolean collectTransactionMetrics, boolean collectQueryMetrics) {
+    this.reset = reset;
+    this.collectTransactionMetrics = collectTransactionMetrics;
+    this.collectQueryMetrics = collectQueryMetrics;
+  }
+
+  @Override
+  public boolean isReset() {
+    return reset;
+  }
+
+  @Override
+  public boolean isCollectTransactionMetrics() {
+    return collectTransactionMetrics;
+  }
+
+  @Override
+  public boolean isCollectQueryMetrics() {
+    return collectQueryMetrics;
+  }
+
+  @Override
+  public void visitStart() {
+    // do nothing by default
+  }
+
+  @Override
+  public void visitEnd() {
+    // do nothing by default
+  }
+}
+

src/main/java/io/ebean/meta/BasicMetricVisitor.java

@@ -0,0 +1,64 @@
+package io.ebean.meta;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A simple MetricVisitor that can collect the desired metrics into lists.
+ */
+public class BasicMetricVisitor extends AbstractMetricVisitor {
+
+  private final List<MetaTimedMetric> timed = new ArrayList<>();
+  private final List<MetaQueryMetric> dtoQuery = new ArrayList<>();
+  private final List<MetaOrmQueryMetric> ormQuery = new ArrayList<>();
+
+  /**
+   * Construct to reset and collect everything.
+   */
+  public BasicMetricVisitor() {
+    super(true, true, true);
+  }
+
+  /**
+   * Construct specifying reset and what to collect.
+   */
+  public BasicMetricVisitor(boolean reset, boolean collectTransactionMetrics, boolean collectQueryMetrics) {
+    super(reset, collectTransactionMetrics, collectQueryMetrics);
+  }
+
+  /**
+   * Return timed metrics for Transactions, labelled SqlQuery, labelled SqlUpdate.
+   */
+  public List<MetaTimedMetric> getTimedMetrics() {
+    return timed;
+  }
+
+  /**
+   * Return the DTO query metrics.
+   */
+  public List<MetaQueryMetric> getDtoQueryMetrics() {
+    return dtoQuery;
+  }
+
+  /**
+   * Return the ORM query metrics.
+   */
+  public List<MetaOrmQueryMetric> getOrmQueryMetrics() {
+    return ormQuery;
+  }
+
+  @Override
+  public void visitTimed(MetaTimedMetric metric) {
+    timed.add(metric);
+  }
+
+  @Override
+  public void visitQuery(MetaQueryMetric metric) {
+    dtoQuery.add(metric);
+  }
+
+  @Override
+  public void visitOrmQuery(MetaOrmQueryMetric metric) {
+    ormQuery.add(metric);
+  }
+}

src/main/java/io/ebean/meta/MetaInfoManager.java

@@ -8,18 +8,20 @@ import java.util.List;
 public interface MetaInfoManager {
 
   /**
-   * Collect and return the transaction execution metrics.
+   * Visit the metrics resetting and collecting/reporting as desired.
    */
-  List<MetaTimedMetric> collectTransactionStatistics(boolean reset);
+  void visitMetrics(MetricVisitor visitor);
 
   /**
-   * Collect and return the non-empty query plan statistics for all the beans.
-   * <p>
-   * Note that this excludes the query plan statistics where there has been no
-   * executions (since the last collection with reset).
-   * </p>
+   * Run a visit collecting all the metrics and returning BasicMetricVisitor
+   * which holds all the metrics in simple lists.
    */
-  List<MetaQueryPlanStatistic> collectQueryPlanStatistics(boolean reset);
+  BasicMetricVisitor visitBasic();
+
+  /**
+   * Just reset all the metrics. Maybe only useful for testing purposes.
+   */
+  void resetAllMetrics();
 
   /**
    * Collect and return the ObjectGraphNode statistics.
@@ -31,6 +33,6 @@ public interface MetaInfoManager {
    *
    * @param reset Set to true to reset the underlying statistics after collection.
    */
-  List<MetaObjectGraphNodeStats> collectNodeStatistics(boolean reset);
+  List<MetaOrmQueryNode> collectNodeStatistics(boolean reset);
 
 }

src/main/java/io/ebean/meta/MetaOrmQueryMetric.java

@@ -0,0 +1,42 @@
+package io.ebean.meta;
+
+import io.ebean.ProfileLocation;
+
+import java.util.List;
+
+/**
+ * Query execution statistics for Orm queries.
+ */
+public interface MetaOrmQueryMetric extends MetaQueryMetric {
+
+  /**
+   * Return the profile location.
+   */
+  ProfileLocation getProfileLocation();
+
+  /**
+   * Return true if this query plan was tuned by AutoTune.
+   */
+  boolean isAutoTuned();
+
+  /**
+   * Return a string representation of the query plan hash.
+   */
+  String getQueryPlanHash();
+
+  /**
+   * Return the time of the last query executed using this plan.
+   */
+  long getLastQueryTime();
+
+  /**
+   * Return the 'origin' points and paths that resulted in the query being
+   * executed and the associated number of times the query was executed via that
+   * path.
+   * <p>
+   * This includes direct and lazy loading paths.
+   * </p>
+   */
+  List<MetaOrmQueryOrigin> getOrigins();
+
+}

src/main/java/io/ebean/meta/MetaOrmQueryNode.java

@@ -8,10 +8,8 @@ import io.ebean.bean.ObjectGraphNode;
  * These statistics can be used to identify origin queries that result in lots
  * of lazy loading.
  * </p>
- *
- * @see MetaInfoManager#collectNodeStatistics(boolean)
  */
-public interface MetaObjectGraphNodeStats {
+public interface MetaOrmQueryNode {
 
   /**
    * Return the ObjectGraphNode which has the origin point and relative path.

src/main/java/io/ebean/meta/MetaOrmQueryOrigin.java

@@ -9,11 +9,8 @@ import io.ebean.bean.ObjectGraphNode;
  * This basically points to the bit of original code and query that results in
  * this query directly or via lazy loading.
  * </p>
- *
- * @see MetaQueryPlanStatistic
- * @see MetaInfoManager#collectQueryPlanStatistics(boolean)
  */
-public interface MetaQueryPlanOriginCount {
+public interface MetaOrmQueryOrigin {
 
   /**
    * The 'origin' and path which this query belongs to.

src/main/java/io/ebean/meta/MetaQueryMetric.java

@@ -0,0 +1,23 @@
+package io.ebean.meta;
+
+/**
+ * Query execution metrics.
+ */
+public interface MetaQueryMetric extends MetaTimedMetric {
+
+  /**
+   * The type of entity or DTO bean.
+   */
+  Class<?> getType();
+
+  /**
+   * The label for the query (can be null).
+   */
+  String getLabel();
+
+  /**
+   * The actual SQL of the query.
+   */
+  String getSql();
+
+}

src/main/java/io/ebean/meta/MetaQueryPlanStatistic.java

@@ -1,98 +0,0 @@
-package io.ebean.meta;
-
-import io.ebean.ProfileLocation;
-
-import java.util.List;
-
-/**
- * Query execution statistics Meta data.
- *
- * @see MetaInfoManager#collectQueryPlanStatistics(boolean)
- */
-public interface MetaQueryPlanStatistic {
-
-  /**
-   * Return the bean type this query plan is for.
-   */
-  Class<?> getBeanType();
-
-  /**
-   * Return the profile location.
-   */
-  ProfileLocation getProfileLocation();
-
-  /**
-   * Return true if this query plan was tuned by AutoTune.
-   */
-  boolean isAutoTuned();
-
-  /**
-   * Return a string representation of the query plan hash.
-   */
-  String getQueryPlanHash();
-
-  /**
-   * Return the sql executed.
-   */
-  String getSql();
-
-  /**
-   * Return the total number of queries executed.
-   */
-  long getExecutionCount();
-
-  /**
-   * Return the total number of beans loaded by the queries.
-   * <p>
-   * This excludes background fetching.
-   * </p>
-   */
-  long getTotalLoadedBeans();
-
-  /**
-   * Return the total time taken by executions of this query.
-   */
-  long getTotalTimeMicros();
-
-  /**
-   * Return the max execution time for this query.
-   */
-  long getMaxTimeMicros();
-
-  /**
-   * Return the time collection started (or was last reset).
-   */
-  long getCollectionStart();
-
-  /**
-   * Return the time of the last query executed using this plan.
-   */
-  long getLastQueryTime();
-
-  /**
-   * Return the average query execution time in microseconds.
-   * <p>
-   * This excludes background fetching.
-   * </p>
-   */
-  long getAvgTimeMicros();
-
-  /**
-   * Return the average number of bean loaded per query.
-   * <p>
-   * This excludes background fetching.
-   * </p>
-   */
-  long getAvgLoadedBeans();
-
-  /**
-   * Return the 'origin' points and paths that resulted in the query being
-   * executed and the associated number of times the query was executed via that
-   * path.
-   * <p>
-   * This includes direct and lazy loading paths.
-   * </p>
-   */
-  List<MetaQueryPlanOriginCount> getOrigins();
-
-}

src/main/java/io/ebean/meta/MetaTimedMetric.java

@@ -6,6 +6,11 @@ package io.ebean.meta;
  */
 public interface MetaTimedMetric {
 
+  /**
+   * Return the metric type.
+   */
+  MetricType getMetricType();
+
   /**
    * Return the metric name.
    */
@@ -27,17 +32,24 @@ public interface MetaTimedMetric {
   long getCount();
 
   /**
-   * Return the total execution time.
+   * Return the total execution time in micros.
    */
   long getTotal();
 
   /**
-   * Return the max execution time.
+   * Return the max execution time in micros.
    */
   long getMax();
 
   /**
-   * Return the mean execution time.
+   * Return the mean execution time in micros.
    */
   long getMean();
+
+  /**
+   * Return the total beans or rows processed or loaded.
+   *
+   * This will be 0 if the metric isn't a query plan (like transaction execution statistics).
+   */
+  long getBeanCount();
 }

src/main/java/io/ebean/meta/MetricType.java

@@ -0,0 +1,30 @@
+package io.ebean.meta;
+
+/**
+ * The type of Metric.
+ */
+public enum MetricType {
+
+  /**
+   * Transactions.
+   */
+  TXN,
+
+  /**
+   * ORM queries.
+   */
+  ORM,
+
+  /**
+   * DTO queries.
+   */
+  DTO,
+
+  /**
+   * SQL queries with a label will have metrics collected.
+   * <p>
+   * SqlQuery and SqlUpdate without a label have no metrics collected.
+   */
+  SQL
+
+}

src/main/java/io/ebean/meta/MetricVisitor.java

@@ -0,0 +1,48 @@
+package io.ebean.meta;
+
+/**
+ * Defines visitor to read and report the transaction and query metrics.
+ */
+public interface MetricVisitor {
+
+  /**
+   * Return true if the metrics should be reset.
+   */
+  boolean isReset();
+
+  /**
+   * Return true if we should visit the transaction metrics.
+   */
+  boolean isCollectTransactionMetrics();
+
+  /**
+   * Return true if we should visit the ORM and SQL query metrics.
+   */
+  boolean isCollectQueryMetrics();
+
+  /**
+   * Visit has started.
+   */
+  void visitStart();
+
+  /**
+   * Visit transaction metrics (and L2 cache metrics in future).
+   */
+  void visitTimed(MetaTimedMetric metric);
+
+  /**
+   * Visit DTO and SQL query metrics.
+   */
+  void visitQuery(MetaQueryMetric metric);
+
+  /**
+   * Visit ORM query metrics.
+   */
+  void visitOrmQuery(MetaOrmQueryMetric metric);
+
+  /**
+   * Visit has completed.
+   */
+  void visitEnd();
+
+}

src/main/java/io/ebean/service/SpiFetchGroupService.java

@@ -0,0 +1,26 @@
+package io.ebean.service;
+
+import io.ebean.FetchGroup;
+import io.ebean.FetchGroupBuilder;
+
+/**
+ * Service that parses FetchGroup expressions.
+ */
+public interface SpiFetchGroupService {
+
+  /**
+   * Return the FetchGroup with the given select clause.
+   *
+   * @param beanType The type of entity bean the fetch group is for
+   * @param select   The properties to select (top level properties)
+   */
+  <T> FetchGroup<T> of(Class<T> beanType, String select);
+
+  /**
+   * Create and return a FetchGroupBuilder starting with a select() clause.
+   *
+   * @param beanType The type of entity bean the fetch group is for
+   * @return The FetchGroupBuilder to add additional select and fetch clauses
+   */
+  <T> FetchGroupBuilder<T> of(Class<T> beanType);
+}

src/main/java/io/ebean/service/SpiRawSqlService.java

@@ -2,8 +2,10 @@ package io.ebean.service;
 
 import io.ebean.RawSql;
 import io.ebean.RawSqlBuilder;
+import io.ebean.SqlRow;
 
 import java.sql.ResultSet;
+import java.sql.SQLException;
 
 /**
  * Service provided by Ebean for parsing and column mapping raw SQL queries.
@@ -24,4 +26,13 @@ public interface SpiRawSqlService {
    * Unparsed SQL so explicit column mapping expected.
    */
   RawSqlBuilder unparsed(String sql);
+
+  /**
+   * Create based on a JDBC ResultSet.
+   *
+   * @param resultSet           The ResultSet row to read as a SqlRow
+   * @param dbTrueValue         The DB true value
+   * @param binaryOptimizedUUID Flag set to true if the UUID value is stored as optimised binary(16)
+   */
+  SqlRow sqlRow(ResultSet resultSet, String dbTrueValue, boolean binaryOptimizedUUID) throws SQLException;
 }

src/main/java/io/ebean/text/PathProperties.java

@@ -89,8 +89,7 @@ public class PathProperties implements FetchPath {
   }
 
   Props getProps(String path) {
-    Props props = pathMap.computeIfAbsent(path, p -> new Props(this, null, p));
-    return props;
+    return pathMap.computeIfAbsent(path, p -> new Props(this, null, p));
   }
 
   public Collection<Props> getPathProps() {

src/main/java/io/ebean/util/AnnotationUtil.java

@@ -104,7 +104,7 @@ public class AnnotationUtil {
   }
 
   /**
-   * Finds all annotations recusively for a class and its superclasses.
+   * Finds all annotations recusively for a class and its superclasses or interfaces.
    */
   public static <A extends Annotation> Set<A> findAnnotationsRecursive(Class<?> clazz, Class<A> annotationType) {
     if (annotationType == null) {
@@ -112,13 +112,28 @@ public class AnnotationUtil {
     }
     Set<A> ret = new LinkedHashSet<>();
     Set<Annotation> visited = new HashSet<>();
-    while (clazz != null && clazz != Object.class) {
-      findMetaAnnotations(clazz, annotationType, ret, visited);
+    Set<Class<?>> visitedInterfaces = new HashSet<>();
+    while (clazz != null && !clazz.getName().startsWith("java.lang.")) {
+      findMetaAnnotationsRecursive(clazz, annotationType, ret, visited, visitedInterfaces);
       clazz = clazz.getSuperclass();
     }
     return ret;
   }
 
+  /**
+   * Searches the interfaces for annotations.
+   */
+  private static <A extends Annotation> void findMetaAnnotationsRecursive(Class<?> clazz,
+      Class<A> annotationType, Set<A> ret,
+      Set<Annotation> visited, Set<Class<?>> visitedInterfaces) {
+    findMetaAnnotations(clazz, annotationType, ret, visited);
+    for (Class<?> iface : clazz.getInterfaces()) {
+      if (!iface.getName().startsWith("java.lang.") && visitedInterfaces.add(iface)) {
+        findMetaAnnotationsRecursive(iface, annotationType, ret, visited, visitedInterfaces);
+      }
+    }
+  }
+
   /**
    * Perform the search algorithm avoiding endless recursion by tracking which
    * annotations have already been visited.

src/main/java/io/ebean/util/CamelCaseHelper.java

@@ -2,6 +2,52 @@ package io.ebean.util;
 
 public class CamelCaseHelper {
 
+  /**
+   * To underscore from camel case using digits compressed true and force upper case false.
+   */
+  public static String toUnderscoreFromCamel(String camelCase) {
+    return toUnderscoreFromCamel(camelCase, true, false);
+  }
+
+  /**
+   * Convert and return the string to underscore from camel case.
+   */
+  public static String toUnderscoreFromCamel(String camelCase, boolean digitsCompressed, boolean forceUpperCase) {
+
+    int lastUpper = -1;
+    StringBuilder sb = new StringBuilder(camelCase.length() + 4);
+    for (int i = 0; i < camelCase.length(); i++) {
+      char c = camelCase.charAt(i);
+
+      if ('_' == c) {
+        // Underscores should just be passed through
+        sb.append(c);
+        lastUpper = i;
+      } else if (Character.isDigit(c)) {
+        if (i > lastUpper + 1 && !digitsCompressed) {
+          sb.append("_");
+        }
+        sb.append(c);
+        lastUpper = i;
+
+      } else if (Character.isUpperCase(c)) {
+        if (i > lastUpper + 1) {
+          sb.append("_");
+        }
+        sb.append(Character.toLowerCase(c));
+        lastUpper = i;
+
+      } else {
+        sb.append(c);
+      }
+    }
+    String ret = sb.toString();
+    if (forceUpperCase) {
+      ret = ret.toUpperCase();
+    }
+    return ret;
+  }
+
   /**
    * To camel from underscore.
    *

src/main/java/io/ebeaninternal/api/BinaryReadContext.java

@@ -0,0 +1,47 @@
+package io.ebeaninternal.api;
+
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+
+/**
+ * Context used to read binary format messages.
+ */
+public class BinaryReadContext {
+
+  private final DataInputStream in;
+
+  /**
+   * Create with protocol 0 and byte data.
+   */
+  public BinaryReadContext(byte[] byteData) {
+    this(new DataInputStream(new ByteArrayInputStream(byteData)));
+  }
+
+  /**
+   * Create with protocol version and DataInputStream data.
+   */
+  public BinaryReadContext(DataInputStream in) {
+    this.in = in;
+  }
+
+  public DataInputStream in() {
+    return in;
+  }
+
+  public boolean readBoolean() throws IOException {
+    return in.readBoolean();
+  }
+
+  public int readInt() throws IOException {
+    return in.readInt();
+  }
+
+  public String readUTF() throws IOException {
+    return in.readUTF();
+  }
+
+  public long readLong() throws IOException {
+    return in.readLong();
+  }
+}

src/main/java/io/ebeaninternal/api/BinaryWritable.java

@@ -0,0 +1,23 @@
+package io.ebeaninternal.api;
+
+import java.io.IOException;
+
+/**
+ * Messages that can be sent in binary form.
+ * <p>
+ * Mainly RemoteTransactionEvent which is sent to cluster members.
+ * </p>
+ */
+public interface BinaryWritable {
+
+  int TYPE_BEANIUD = 1;
+  int TYPE_TABLEIUD = 2;
+  int TYPE_CACHE = 3;
+  int TYPE_TABLEMOD = 4;
+
+  /**
+   * Write message in binary format.
+   */
+  void writeBinary(BinaryWriteContext out) throws IOException;
+
+}

src/main/java/io/ebeaninternal/api/BinaryWriteContext.java

@@ -0,0 +1,49 @@
+package io.ebeaninternal.api;
+
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+/**
+ * Context used to write binary message (like RemoteTransactionEvent).
+ */
+public class BinaryWriteContext {
+
+  private final DataOutputStream out;
+
+  private long counter;
+
+  public BinaryWriteContext(DataOutputStream out) {
+    this.out = out;
+  }
+
+  /**
+   * Return the number of message parts that have been written.
+   */
+  public long counter() {
+    return counter;
+  }
+
+  /**
+   * Return the output stream to write to.
+   */
+  public DataOutputStream os() {
+    return out;
+  }
+
+  /**
+   * Start a message part with a given type code.
+   */
+  public DataOutputStream start(int type) throws IOException {
+    counter++;
+    out.writeBoolean(true);
+    out.writeInt(type);
+    return out;
+  }
+
+  /**
+   * End of message parts.
+   */
+  public void end() throws IOException {
+    out.writeBoolean(false);
+  }
+}

src/main/java/io/ebeaninternal/api/BindParams.java

@@ -1,5 +1,6 @@
 package io.ebeaninternal.api;
 
+import io.ebeaninternal.server.persist.MultiValueWrapper;
 import io.ebeaninternal.server.querydefn.NaturalKeyBindParam;
 
 import java.io.Serializable;
@@ -154,6 +155,10 @@ public class BindParams implements Serializable {
   public void setParameter(int position, Object value) {
 
     Param p = getParam(position);
+    if (value instanceof Collection) {
+      // use of postgres ANY with positioned parameter
+      value = new MultiValueWrapper((Collection)value);
+    }
     p.setInValue(value);
   }
 

src/main/java/io/ebeaninternal/api/LoadManyRequest.java

@@ -1,6 +1,5 @@
 package io.ebeaninternal.api;
 
-import io.ebean.EbeanServer;
 import io.ebean.bean.BeanCollection;
 import io.ebean.bean.EntityBean;
 import io.ebean.util.StringHelper;
@@ -124,11 +123,11 @@ public class LoadManyRequest extends LoadRequest {
     return loadContext.getBeanProperty();
   }
 
-  public SpiQuery<?> createQuery(EbeanServer server, int batchSize) {
+  public SpiQuery<?> createQuery(SpiEbeanServer server, int batchSize) {
 
     BeanPropertyAssocMany<?> many = getMany();
 
-    SpiQuery<?> query = (SpiQuery<?>) server.createQuery(many.getTargetType());
+    SpiQuery<?> query = many.newQuery(server);
     String orderBy = many.getLazyFetchOrderBy();
     if (orderBy != null) {
       query.orderBy(orderBy);

src/main/java/io/ebeaninternal/api/ScopeTrans.java

@@ -53,6 +53,10 @@ public class ScopeTrans {
    */
   private boolean rolledBack;
 
+  /**
+   * Flag set when nested commit has occurred.
+   */
+  private boolean nestedCommit;
 
   public ScopeTrans(boolean rollbackOnChecked, boolean created, SpiTransaction transaction, TxScope txScope) {
 
@@ -113,7 +117,6 @@ public class ScopeTrans {
     complete();
   }
 
-
   /**
    * Complete the transaction programmatically. Try to commit.
    */
@@ -124,7 +127,7 @@ public class ScopeTrans {
   }
 
   public void end() {
-    if (created) {
+    if (created || !nestedCommit) {
       transaction.end();
     }
   }
@@ -133,6 +136,7 @@ public class ScopeTrans {
     if (created) {
       transaction.commit();
     } else {
+      nestedCommit = true;
       transaction.setBatchFlushOnQuery(restoreBatchFlushOnQuery);
       if (restoreBatch != null) {
         transaction.setBatch(restoreBatch);

src/main/java/io/ebeaninternal/api/ScopedTransaction.java

@@ -21,6 +21,11 @@ public class ScopedTransaction extends SpiTransactionProxy {
 
   private ScopeTrans current;
 
+  /**
+   * Flag set when we clear the thread scope (on commit/rollback or end).
+   */
+  private boolean scopeCleared;
+
   public ScopedTransaction(TransactionScopeManager manager) {
     this.manager = manager;
   }
@@ -47,30 +52,51 @@ public class ScopedTransaction extends SpiTransactionProxy {
    */
   public void complete(Object returnOrThrowable, int opCode) {
     current.complete(returnOrThrowable, opCode);
+    // no finally here for pop() as we come in here twice if an
+    // error is thrown on commit (due to enhancement finally block)
     pop();
   }
 
   /**
-   * Programmatic complete - finally block, try to commit.
+   * Internal programmatic complete - finally block, try to commit.
    */
   public void complete() {
-    current.complete();
-    pop();
+    try {
+      current.complete();
+    } finally {
+      pop();
+    }
+  }
+
+  private void clearScopeOnce() {
+    if (!scopeCleared) {
+      manager.set(null);
+      scopeCleared = true;
+    }
+  }
+
+  private boolean clearScope() {
+    if (stack.isEmpty()) {
+      clearScopeOnce();
+      return true;
+    }
+    return false;
   }
 
   private void pop() {
-    if (!stack.isEmpty()) {
+    if (!clearScope()) {
       current = stack.pop();
       transaction = current.getTransaction();
-    } else {
-      manager.set(null);
     }
   }
 
   @Override
   public void end() throws PersistenceException {
-    current.end();
-    pop();
+    try {
+      current.end();
+    } finally {
+      pop();
+    }
   }
 
   @Override
@@ -80,17 +106,29 @@ public class ScopedTransaction extends SpiTransactionProxy {
 
   @Override
   public void commit() {
-    current.commitTransaction();
+    try {
+      current.commitTransaction();
+    } finally {
+      clearScope();
+    }
   }
 
   @Override
   public void rollback() throws PersistenceException {
-    current.rollback(null);
+    try {
+      current.rollback(null);
+    } finally {
+      clearScope();
+    }
   }
 
   @Override
   public void rollback(Throwable e) throws PersistenceException {
-    current.rollback(e);
+    try {
+      current.rollback(e);
+    } finally {
+      clearScope();
+    }
   }
 
   @Override

src/main/java/io/ebeaninternal/api/SpiContainerBootup.java

@@ -1,18 +0,0 @@
-package io.ebeaninternal.api;
-
-/**
- * Plugin API available to invoke something prior to container bootup.
- * <p>
- * The initial intent is to provide a hook for 'docker-run' such that we can automatically ensure
- * we have a test DB docker container running and setup ready to go.
- * </p>
- */
-public interface SpiContainerBootup {
-
-  /**
-   * Run something at bootup prior to the container starting.
-   *
-   * For example, start DB docker container(s).
-   */
-  void bootup();
-}

src/main/java/io/ebeaninternal/api/SpiDtoQuery.java

@@ -0,0 +1,52 @@
+package io.ebeaninternal.api;
+
+import io.ebean.DtoQuery;
+import io.ebeaninternal.server.dto.DtoMappingRequest;
+import io.ebeaninternal.server.dto.DtoQueryPlan;
+
+/**
+ * Internal extension to DtoQuery.
+ */
+public interface SpiDtoQuery<T> extends DtoQuery<T>, SpiSqlBinding {
+
+  /**
+   * Return the key for query plan.
+   */
+  String planKey();
+
+  /**
+   * Get the query plan for the cache.
+   */
+  DtoQueryPlan getQueryPlan(Object planKey);
+
+  /**
+   * Build the query plan.
+   */
+  DtoQueryPlan buildPlan(DtoMappingRequest request);
+
+  /**
+   * Put the query plan into the cache.
+   */
+  void putQueryPlan(Object planKey, DtoQueryPlan plan);
+
+  /**
+   * Return true if the query is in relaxed mapping mode.
+   */
+  boolean isRelaxedMode();
+
+  /**
+   * Return the label for the query.
+   */
+  String getLabel();
+
+  /**
+   * Return the associated DTO bean type.
+   */
+  Class<T> getType();
+
+  /**
+   * Return an underlying ORM query (if this query is built from an ORM query).
+   */
+  SpiQuery<?> getOrmQuery();
+
+}

src/main/java/io/ebeaninternal/api/SpiEbeanServer.java

@@ -1,8 +1,12 @@
 package io.ebeaninternal.api;
 
+import io.ebean.DtoQuery;
 import io.ebean.EbeanServer;
+import io.ebean.ExtendedServer;
 import io.ebean.PersistenceContextScope;
 import io.ebean.Query;
+import io.ebean.RowConsumer;
+import io.ebean.RowMapper;
 import io.ebean.Transaction;
 import io.ebean.TxScope;
 import io.ebean.bean.BeanCollectionLoader;
@@ -13,18 +17,27 @@ import io.ebean.config.ServerConfig;
 import io.ebean.config.dbplatform.DatabasePlatform;
 import io.ebean.event.readaudit.ReadAuditLogger;
 import io.ebean.event.readaudit.ReadAuditPrepare;
+import io.ebean.meta.MetricVisitor;
 import io.ebeaninternal.dbmigration.ddlgeneration.DdlHandler;
+import io.ebeaninternal.server.core.SpiResultSet;
 import io.ebeaninternal.server.core.timezone.DataTimeZone;
 import io.ebeaninternal.server.deploy.BeanDescriptor;
 import io.ebeaninternal.server.query.CQuery;
 import io.ebeaninternal.server.transaction.RemoteTransactionEvent;
 
 import java.util.List;
+import java.util.function.Consumer;
+import java.util.function.Predicate;
 
 /**
  * Service Provider extension to EbeanServer.
  */
-public interface SpiEbeanServer extends EbeanServer, BeanLoader, BeanCollectionLoader {
+public interface SpiEbeanServer extends ExtendedServer, EbeanServer, BeanLoader, BeanCollectionLoader {
+
+  /**
+   * Return the log manager.
+   */
+  SpiLogManager log();
 
   /**
    * Return the server extended Json context.
@@ -224,4 +237,79 @@ public interface SpiEbeanServer extends EbeanServer, BeanLoader, BeanCollectionL
    */
   void scopedTransactionExit(Object returnOrThrowable, int opCode);
 
+  /**
+   * SqlQuery find single attribute.
+   */
+  <T> T findSingleAttribute(SpiSqlQuery query, Class<T> cls);
+
+  /**
+   * SqlQuery find single attribute list.
+   */
+  <T> List<T> findSingleAttributeList(SpiSqlQuery query, Class<T> cls);
+
+  /**
+   * SqlQuery find one with mapper.
+   */
+  <T> T findOneMapper(SpiSqlQuery query, RowMapper<T> mapper);
+
+  /**
+   * SqlQuery find list with mapper.
+   */
+  <T> List<T> findListMapper(SpiSqlQuery query, RowMapper<T> mapper);
+
+  /**
+   * SqlQuery find each with consumer.
+   */
+  void findEachRow(SpiSqlQuery query, RowConsumer consumer);
+
+  /**
+   * DTO findList query.
+   */
+  <T> List<T> findDtoList(SpiDtoQuery<T> query);
+
+  /**
+   * DTO findOne query.
+   */
+  <T> T findDtoOne(SpiDtoQuery<T> query);
+
+  /**
+   * DTO findEach query.
+   */
+  <T> void findDtoEach(SpiDtoQuery<T> query, Consumer<T> consumer);
+
+  /**
+   * DTO findEachWhile query.
+   */
+  <T> void findDtoEachWhile(SpiDtoQuery<T> query, Predicate<T> consumer);
+
+  /**
+   * Return / wrap the ORM query as a DTO query.
+   */
+  <D> DtoQuery<D> findDto(Class<D> dtoType, SpiQuery<?> ormQuery);
+
+  /**
+   * Execute the underlying ORM query returning as a JDBC ResultSet to map to DTO beans.
+   */
+  SpiResultSet findResultSet(SpiQuery<?> ormQuery, SpiTransaction transaction);
+
+  /**
+   * Visit all the metrics (typically reporting them).
+   */
+  void visitMetrics(MetricVisitor visitor);
+
+  /**
+   * Return true if a row for the bean type and id exists.
+   */
+  boolean exists(Class<?> beanType, Object beanId, Transaction transaction);
+
+  /**
+   * Add to JDBC batch for later execution.
+   */
+  void addBatch(SpiSqlUpdate defaultSqlUpdate, SpiTransaction transaction);
+
+  /**
+   * Execute the batched statement.
+   */
+  int[] executeBatch(SpiSqlUpdate defaultSqlUpdate, SpiTransaction transaction);
+
 }

src/main/java/io/ebeaninternal/api/SpiExpressionRequest.java

@@ -1,8 +1,8 @@
 package io.ebeaninternal.api;
 
-import io.ebeaninternal.server.core.DbExpressionHandler;
 import io.ebeaninternal.server.core.SpiOrmQueryRequest;
 import io.ebeaninternal.server.deploy.BeanDescriptor;
+import io.ebeaninternal.server.expression.platform.DbExpressionHandler;
 
 import java.util.List;
 

src/main/java/io/ebeaninternal/api/SpiJsonContext.java

@@ -1,9 +1,11 @@
 package io.ebeaninternal.api;
 
 import com.fasterxml.jackson.core.JsonGenerator;
+import io.ebean.plugin.BeanType;
 import io.ebean.text.json.JsonContext;
 import io.ebean.text.json.JsonWriteOptions;
-import io.ebeaninternal.server.text.json.SpiJsonWriter;
+import io.ebeaninternal.api.json.SpiJsonReader;
+import io.ebeaninternal.api.json.SpiJsonWriter;
 
 import java.io.Writer;
 
@@ -21,4 +23,10 @@ public interface SpiJsonContext extends JsonContext {
    * Create a Json Writer for writing beans as JSON supplying a writer.
    */
   SpiJsonWriter createJsonWriter(Writer writer);
+
+  /**
+   * Create a Json Reader for reading the JSON content.
+   */
+  SpiJsonReader createJsonRead(BeanType<?> beanType, String json);
+
 }

src/main/java/io/ebeaninternal/api/SpiLogManager.java

@@ -0,0 +1,27 @@
+package io.ebeaninternal.api;
+
+/**
+ * Log manager for SQL, TXN and Summary logging.
+ * <p>
+ * In general at runtime this uses SLF4J Logger but this abstraction allows us to capture
+ * the logged SQL during testing such that we can assert against the executed sql if desired.
+ * </p>
+ */
+public interface SpiLogManager {
+
+  /**
+   * Return the SQL logger.
+   */
+  SpiLogger sql();
+
+  /**
+   * Return the TXN logger.
+   */
+  SpiLogger txn();
+
+  /**
+   * Return the Summary logger.
+   */
+  SpiLogger sum();
+
+}

src/main/java/io/ebeaninternal/api/SpiLogger.java

@@ -0,0 +1,31 @@
+package io.ebeaninternal.api;
+
+/**
+ * Logger for SQL, TXN and Summary logging.
+ * <p>
+ * In general at runtime this uses SLF4J Logger but this abstraction allows us to capture
+ * the logged SQL during testing such that we can assert against the executed sql if desired.
+ * </p>
+ */
+public interface SpiLogger {
+
+  /**
+   * Is debug logging enabled.
+   */
+  boolean isDebug();
+
+  /**
+   * Is trace logging enabled.
+   */
+  boolean isTrace();
+
+  /**
+   * Log a debug level message.
+   */
+  void debug(String msg);
+
+  /**
+   * Log a trace level message.
+   */
+  void trace(String msg);
+}

src/main/java/io/ebeaninternal/api/SpiLoggerFactory.java

@@ -0,0 +1,12 @@
+package io.ebeaninternal.api;
+
+/**
+ * API for Plugins to define the logger for io.ebean.SQL, io.ebean.TXN and io.ebean.SUM.
+ */
+public interface SpiLoggerFactory {
+
+  /**
+   * Create the logger given the name.
+   */
+  SpiLogger create(String name);
+}

src/main/java/io/ebeaninternal/api/SpiQuery.java

@@ -1,6 +1,7 @@
 package io.ebeaninternal.api;
 
 import io.ebean.CacheMode;
+import io.ebean.CountDistinctOrder;
 import io.ebean.ExpressionList;
 import io.ebean.OrderBy;
 import io.ebean.PersistenceContextScope;
@@ -178,6 +179,11 @@ public interface SpiQuery<T> extends Query<T>, TxnProfileEventCodes {
    */
   ProfileLocation getProfileLocation();
 
+  /**
+   * Return the label set on the query.
+   */
+  String getLabel();
+
   /**
    * Return true if this is a "find by id" query. This includes a check for a single "equal to" expression for the Id.
    */
@@ -214,6 +220,11 @@ public interface SpiQuery<T> extends Query<T>, TxnProfileEventCodes {
    */
   BeanDescriptor<T> getBeanDescriptor();
 
+  /**
+   * Return the query plan key.
+   */
+  Object getQueryPlanKey();
+
   /**
    * Return the RawSql that was set to use for this query.
    */
@@ -633,9 +644,9 @@ public interface SpiQuery<T> extends Query<T>, TxnProfileEventCodes {
   boolean isBeanCachePut();
 
   /**
-   * Return true if the bean cache is being explicitly loaded via RECACHE mode.
+   * Return true if we must hit the DB (Cache reload or select for update).
    */
-  boolean isBeanCacheReload();
+  boolean isForceHitDatabase();
 
   /**
    * Return the cache mode for using the bean cache (Get and Put).
@@ -747,6 +758,16 @@ public interface SpiQuery<T> extends Query<T>, TxnProfileEventCodes {
    */
   boolean isDistinct();
 
+  /**
+   * Return true if the Id property is manually included in the query (DTO queries).
+   */
+  boolean isManualId();
+
+  /**
+   * Set to true when we only include the Id property if it is explicitly included in the select().
+   */
+  void setManualId(boolean manualId);
+
   /**
    * Set default select clauses where none have been explicitly defined.
    */
@@ -822,4 +843,9 @@ public interface SpiQuery<T> extends Query<T>, TxnProfileEventCodes {
    * Simplify nested expression lists where possible.
    */
   void simplifyExpressions();
+
+  /**
+   * Returns the count distinct order setting.
+   */
+  CountDistinctOrder getCountDistinctOrder();
 }

src/main/java/io/ebeaninternal/api/SpiSqlBinding.java

@@ -0,0 +1,43 @@
+package io.ebeaninternal.api;
+
+/**
+ * SQL query binding (for SqlQuery and DtoQuery).
+ */
+public interface SpiSqlBinding {
+
+  /**
+   * Return the named or positioned parameters.
+   */
+  BindParams getBindParams();
+
+  /**
+   * return the query.
+   */
+  String getQuery();
+
+  /**
+   * Return the label (to collect metrics on when set).
+   */
+  String getLabel();
+
+  /**
+   * Return the first row to fetch.
+   */
+  int getFirstRow();
+
+  /**
+   * Return the maximum number of rows to fetch.
+   */
+  int getMaxRows();
+
+  /**
+   * Return the query timeout.
+   */
+  int getTimeout();
+
+  /**
+   * Return the hint for Statement.setFetchSize().
+   */
+  int getBufferFetchSizeHint();
+
+}

src/main/java/io/ebeaninternal/api/SpiSqlQuery.java

@@ -5,36 +5,6 @@ import io.ebean.SqlQuery;
 /**
  * SQL query - Internal extension to SqlQuery.
  */
-public interface SpiSqlQuery extends SqlQuery {
-
-  /**
-   * Return the named or positioned parameters.
-   */
-  BindParams getBindParams();
-
-  /**
-   * return the query.
-   */
-  String getQuery();
-
-  /**
-   * Return the first row to fetch.
-   */
-  int getFirstRow();
-
-  /**
-   * Return the maximum number of rows to fetch.
-   */
-  int getMaxRows();
-
-  /**
-   * Return the query timeout.
-   */
-  int getTimeout();
-
-  /**
-   * Return the hint for Statement.setFetchSize().
-   */
-  int getBufferFetchSizeHint();
+public interface SpiSqlQuery extends SqlQuery, SpiSqlBinding {
 
 }

src/main/java/io/ebeaninternal/api/SpiSqlUpdate.java

@@ -23,4 +23,9 @@ public interface SpiSqlUpdate extends SqlUpdate {
    * Set the generated key value.
    */
   void setGeneratedKey(Object idValue);
+
+  /**
+   * Reset bind position to be ready for another bind execute.
+   */
+  void reset();
 }

src/main/java/io/ebeaninternal/api/SpiTransaction.java

@@ -101,6 +101,11 @@ public interface SpiTransaction extends Transaction {
    */
   String getId();
 
+  /**
+   * Return the start timestamp for the transaction (JVM side).
+   */
+  long getStartMillis();
+
   /**
    * Return true if this transaction has updateAllLoadedProperties set.
    * If null is returned the server default is used (set on ServerConfig).
@@ -179,7 +184,7 @@ public interface SpiTransaction extends Transaction {
    * Return true if this request should be batched. Conversely returns false
    * if this request should be executed immediately.
    */
-  boolean isBatchThisRequest(PersistRequest.Type type);
+  boolean isBatchThisRequest();
 
   /**
    * Return the BatchControl used to batch up persist requests.
@@ -319,4 +324,9 @@ public interface SpiTransaction extends Transaction {
    * Return the profile location for this transaction.
    */
   ProfileLocation getProfileLocation();
+
+  /**
+   * Return true when nested transactions should create Savepoints.
+   */
+  boolean isNestedUseSavepoint();
 }

src/main/java/io/ebeaninternal/api/SpiTransactionProxy.java

@@ -21,7 +21,7 @@ import java.sql.SQLException;
 /**
  * Proxy for an underlying SpiTransaction (most of the API).
  */
-abstract class SpiTransactionProxy implements SpiTransaction {
+public abstract class SpiTransactionProxy implements SpiTransaction {
 
   protected SpiTransaction transaction;
 
@@ -30,6 +30,11 @@ abstract class SpiTransactionProxy implements SpiTransaction {
     return transaction.translate(message, cause);
   }
 
+  @Override
+  public long getStartMillis() {
+    return transaction.getStartMillis();
+  }
+
   @Override
   public void setLabel(String label) {
     transaction.setLabel(label);
@@ -50,6 +55,16 @@ abstract class SpiTransactionProxy implements SpiTransaction {
     return transaction.isRollbackOnly();
   }
 
+  @Override
+  public void setNestedUseSavepoint() {
+    transaction.setNestedUseSavepoint();
+  }
+
+  @Override
+  public boolean isNestedUseSavepoint() {
+    return transaction.isNestedUseSavepoint();
+  }
+
   @Override
   public long profileOffset() {
     return transaction.profileOffset();
@@ -235,6 +250,11 @@ abstract class SpiTransactionProxy implements SpiTransaction {
     transaction.setBatchMode(useBatch);
   }
 
+  @Override
+  public boolean isBatchMode() {
+    return transaction.isBatchMode();
+  }
+
   @Override
   public void setBatch(PersistBatch persistBatchMode) {
     transaction.setBatch(persistBatchMode);
@@ -245,11 +265,21 @@ abstract class SpiTransactionProxy implements SpiTransaction {
     return transaction.getBatch();
   }
 
+  @Override
+  public void setBatchOnCascade(boolean batchMode) {
+    transaction.setBatchOnCascade(batchMode);
+  }
+
   @Override
   public void setBatchOnCascade(PersistBatch batchOnCascadeMode) {
     transaction.setBatchOnCascade(batchOnCascadeMode);
   }
 
+  @Override
+  public boolean isBatchOnCascade() {
+    return transaction.isBatchOnCascade();
+  }
+
   @Override
   public PersistBatch getBatchOnCascade() {
     return transaction.getBatchOnCascade();
@@ -346,8 +376,8 @@ abstract class SpiTransactionProxy implements SpiTransaction {
   }
 
   @Override
-  public boolean isBatchThisRequest(PersistRequest.Type type) {
-    return transaction.isBatchThisRequest(type);
+  public boolean isBatchThisRequest() {
+    return transaction.isBatchThisRequest();
   }
 
   @Override

src/main/java/io/ebeaninternal/api/SpiUpdate.java

@@ -43,6 +43,11 @@ public interface SpiUpdate<T> extends Update<T> {
    */
   Class<?> getBeanType();
 
+  /**
+   * Return the label (for metrics collection).
+   */
+  String getLabel();
+
   /**
    * Return the type of this - insert, update or delete.
    */