[maven-release-plugin] prepare release ebean-11.10.2

Fix

pom.xml

@@ -9,7 +9,7 @@
 
   <groupId>io.ebean</groupId>
   <artifactId>ebean</artifactId>
-  <version>11.4.1</version>
+  <version>11.10.2</version>
   <packaging>jar</packaging>
 
   <name>ebean</name>
@@ -17,7 +17,7 @@
 
   <scm>
     <developerConnection>scm:git:git@github.com:ebean-orm/ebean.git</developerConnection>
-    <tag>ebean-11.4.1</tag>
+    <tag>ebean-11.10.2</tag>
   </scm>
 
   <profiles>
@@ -72,6 +72,17 @@
   </profiles>
   <dependencies>
 
+    <!--
+    Projects are expected to explicit depend on version
+    of slf4j that they want to use
+    -->
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+      <version>1.7.25</version>
+      <scope>provided</scope>
+    </dependency>
+
     <!--
     Class retention Nonnull and Nullable annotations
     to assist with IDE auto-completion with Ebean API
@@ -92,43 +103,25 @@
     <dependency>
       <groupId>io.ebean</groupId>
       <artifactId>ebean-annotation</artifactId>
-      <version>3.2</version>
-    </dependency>
-
-    <dependency>
-      <groupId>org.avaje</groupId>
-      <artifactId>avaje-datasource-api</artifactId>
-      <version>1.1</version>
+      <version>3.6</version>
     </dependency>
 
     <dependency>
       <groupId>org.avaje</groupId>
       <artifactId>avaje-datasource</artifactId>
-      <version>2.1.2</version>
-    </dependency>
-
-    <dependency>
-      <groupId>org.avaje</groupId>
-      <artifactId>avaje-classpath-scanner-api</artifactId>
-      <version>2.2</version>
+      <version>3.1.1</version>
     </dependency>
 
     <dependency>
       <groupId>org.avaje</groupId>
       <artifactId>avaje-classpath-scanner</artifactId>
-      <version>2.2.4</version>
+      <version>3.1.1</version>
     </dependency>
 
     <dependency>
       <groupId>io.ebean</groupId>
       <artifactId>ebean-migration</artifactId>
-      <version>11.1.1</version>
-    </dependency>
-
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-api</artifactId>
-      <version>[1.7.1,1.7.99)</version>
+      <version>11.3.1</version>
     </dependency>
 
     <dependency>
@@ -205,6 +198,13 @@
       <!--<scope>test</scope>-->
     <!--</dependency>-->
 
+    <dependency>
+      <groupId>ch.qos.logback</groupId>
+      <artifactId>logback-classic</artifactId>
+      <version>1.2.3</version>
+      <scope>test</scope>
+    </dependency>
+
     <dependency>
       <groupId>org.avaje</groupId>
       <artifactId>avaje-agentloader</artifactId>
@@ -215,7 +215,7 @@
     <dependency>
       <groupId>io.ebean</groupId>
       <artifactId>ebean-agent</artifactId>
-      <version>11.4.1</version>
+      <version>11.9.1</version>
       <scope>test</scope>
     </dependency>
 
@@ -288,7 +288,7 @@
       <plugin>
         <groupId>io.ebean</groupId>
         <artifactId>ebean-maven-plugin</artifactId>
-        <version>11.4.1</version>
+        <version>11.9.1</version>
         <executions>
           <execution>
             <id>test</id>

src/main/java/io/ebean/CacheMode.java

@@ -1,55 +1,91 @@
 package io.ebean;
+
 /**
- * Enum to control the different cache modes for queryCache (and maybe later) beanCache.
- * 
- * If cache is enabled, you must be careful, what you do with the returned collection.
+ * Enum to control the different cache modes for queryCache and beanCache.
+ * <h3>Bean cache</h3>
+ * <p>
+ * The bean cache is automatically used by default on <code>@Cache</code> beans for
+ * the following queries:
+ * </p>
+ * <ul>
+ * <li>findOne() by id</li>
+ * <li>findOne() by natural key(s)</li>
+ * <li>findList() by ids</li>
+ * </ul>
+ * <p>
+ * Bean caching needs to be explicitly turned on for queries that are findList() by natural keys.
+ * </p>
+ * <h3>Query cache</h3>
+ * <p>
+ * For query cache use note that you must be careful, what you do with the returned collection.
  * By default the returned collections are read only and you will get an exception if you try
  * to change them.
  * If you add ".setReadOnly(false)" to your query, you'll get a collection that is a clone from the
- * one in the cache. That means, changing does not affect the cache
- * 
+ * one in the cache. That means, changing does not affect the cache.
+ * </p>
+ *
  * @author Roland Praml, FOCONIS AG
  */
 public enum CacheMode {
+
   /**
    * Do not use cache.
    */
   OFF(false, false),
-  
+
   /**
-   * Use the cace (query & store the resut). 
+   * Use the cache and store a result when needed.
    */
-  ON(true, true), 
-  
+  ON(true, true),
+
   /**
-   * Do not read from cache, but write retrived value to cache.
-   * Use this, if you want to get the fresh value from database and a CacheMode.ON query will follow.
+   * Only used for bean caching.
+   * <p>
+   * The bean cache is automatically used by default on <code>@Cache</code> beans for
+   * the following queries:
+   * </p>
+   * <ul>
+   * <li>findOne() by id</li>
+   * <li>findOne() by natural key(s)</li>
+   * <li>findList() by ids</li>
+   * </ul>
+   * <p>
+   * Bean caching needs to be explicitly turned on for queries that are findList() by natural keys.
+   * </p>
    */
-  RECACHE(false, true),
-  
+  AUTO(true, true),
+
   /**
-   * Query the cache for value. If it is there, use it, otherwise hit database but do NOT put the value
-   * into the cache. (this mode is for completeness. There's probably no use case for this)
+   * Do not read from cache, but put beans into the cache and invalidate parts of the cache as necessary.
+   * <p>
+   * Use this on a query if you want to get the fresh value from database and put it into the cache.
    */
-  QUERY_ONLY(true,false);
-  
+  PUT(false, true),
+
+  /**
+   * GET only from the cache.
+   * <p>
+   * This mode does not put entries into the cache or invalidate parts of the cache.
+   */
+  GET(true, false);
+
   private boolean get;
   private boolean put;
 
-  private CacheMode(boolean get, boolean put) {
+  CacheMode(boolean get, boolean put) {
     this.get = get;
     this.put = put;
   }
-  
+
   /**
-   * Retruns <code>true</code> if value is read from cache.
+   * Return true if value is read from cache.
    */
   public boolean isGet() {
     return get;
   }
-  
+
   /**
-   * Returns <code>true</code> if value (from database) is written to cache.
+   * Return true if a newly loaded value (from database) is put into the cache.
    */
   public boolean isPut() {
     return put;

src/main/java/io/ebean/DocumentStore.java

@@ -123,11 +123,8 @@ public interface DocumentStore {
    *  server.find(Order.class)
    *    .setUseDocStore(true)
    *    .where()... // perhaps add predicates
-   *    .findEach(new QueryEachConsumer<Order>() {
-   *      @Override
-   *      public void accept(Order bean) {
-   *        // process the bean
-   *      }
+   *    .findEach((Order order) -> {
+   *      // process the bean ...
    *    });
    *
    * }</pre>
@@ -151,7 +148,7 @@ public interface DocumentStore {
    *  server.find(Order.class)
    *    .setUseDocStore(true)
    *    .where()... // perhaps add predicates
-   *    .findEachWhile(new QueryEachWhileConsumer<Order>() {
+   *    .findEachWhile(new Predicate<Order>() {
    *      @Override
    *      public void accept(Order bean) {
    *        // process the bean

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

@@ -851,7 +851,7 @@ public interface EbeanServer {
    * 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 QueryEachWhileConsumer.
+   * results early by returning false for the Predicate.
    * </p>
    * <p>
    * Unlike findList() this is suitable for processing a query that will return

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

@@ -246,6 +246,11 @@ public interface ExpressionFactory {
    */
   Expression icontains(String propertyName, String value);
 
+  /**
+   * In expression using pairs of value objects.
+   */
+  Expression inPairs(Pairs pairs);
+
   /**
    * In - property has a value in the array of values.
    */

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

@@ -5,9 +5,9 @@ import io.ebean.search.MultiMatch;
 import io.ebean.search.TextCommonTerms;
 import io.ebean.search.TextQueryString;
 import io.ebean.search.TextSimple;
-import javax.annotation.Nullable;
 
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import javax.persistence.NonUniqueResultException;
 import java.sql.Timestamp;
 import java.util.Collection;
@@ -261,6 +261,24 @@ public interface ExpressionList<T> {
   @Nonnull
   <A> List<A> findSingleAttributeList();
 
+  /**
+   * Execute a query returning a single value of a single property/column.
+   * <p>
+   * <pre>{@code
+   *
+   *  String name =
+   *    Ebean.find(Customer.class)
+   *      .select("name")
+   *      .where().eq("id", 42)
+   *      .findSingleAttribute();
+   *
+   * }</pre>
+   */
+  default <A> A findSingleAttribute() {
+    List<A> list = findSingleAttributeList();
+    return !list.isEmpty() ? list.get(0) : null;
+  }
+
   /**
    * Execute the query returning a single bean or null (if no matching
    * bean is found).
@@ -439,14 +457,24 @@ public interface ExpressionList<T> {
   Query<T> setMapKey(String mapKey);
 
   /**
-   * Set to true to use the query for executing this query.
+   * Set to true when this query should use the bean cache.
+   * <p>
+   * This is now the same as setUseBeanCache(CacheMode.ON) and will be deprecated.
+   * </p>
    *
    * @see Query#setUseCache(boolean)
    */
   Query<T> setUseCache(boolean useCache);
 
   /**
-   * Set the {@link CacheMode} to use the query for executing this query.
+   * Set the mode to use the bean cache when executing this query.
+   *
+   * @see Query#setBeanCacheMode(CacheMode)
+   */
+  Query<T> setBeanCacheMode(CacheMode beanCacheMode);
+
+  /**
+   * Set the {@link CacheMode} to use the query cache for executing this query.
    *
    * @see Query#setUseQueryCache(boolean)
    */
@@ -793,6 +821,11 @@ public interface ExpressionList<T> {
    */
   ExpressionList<T> icontains(String propertyName, String value);
 
+  /**
+   * In expression using pairs of value objects.
+   */
+  ExpressionList<T> inPairs(Pairs pairs);
+
   /**
    * In - using a subQuery.
    */

src/main/java/io/ebean/Pairs.java

@@ -0,0 +1,220 @@
+package io.ebean;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Holds a list of value object pairs.
+ * <p>
+ * This feature is to enable use of L2 cache with complex natural keys with findList() queries in cases where the
+ * IN clause is not a single property but instead a pair of properties.
+ * </p>
+ * <p>
+ * These queries can have predicates that can be translated into a list of complex natural keys such that the L2
+ * cache can be hit with these keys to obtain some or all of the beans from L2 cache rather than the DB.
+ * </p>
+ * <pre>{@code
+ *
+ *   // where a bean is annotated with a complex
+ *   // natural key made of several properties
+ *   @Cache(naturalKey = {"store","code","sku"})
+ *
+ *
+ *   Pairs pairs = new Pairs("sku", "code");
+ *   pairs.add("sj2", 1000);
+ *   pairs.add("sj2", 1001);
+ *   pairs.add("pf3", 1000);
+ *
+ *   List<OCachedNatKeyBean3> list = Ebean.find(OCachedNatKeyBean3.class)
+ *   .where()
+ *   .eq("store", "def")
+ *   .inPairs(pairs)       // IN clause with 'pairs' of values
+ *   .orderBy("sku desc")
+ *
+ *   // query expressions cover the natural key properties
+ *   // so we can choose to hit the L2 bean cache if we want
+ *   .setUseCache(true)
+ *   .findList();
+ *
+ * }</pre>
+ * <h3>Important implementation Note</h3>
+ * <p>
+ * When binding many pairs of values we want to be able to utilise a DB index (as this type of query usually means the
+ * pairs are a unique key/index or part of a unique key/index and highly selective). Currently we know we can do this
+ * on any DB that supports expression/formula based indexes.
+ * using a DB string concatenation formula
+ * </p>
+ * <p>
+ * This means, the implementation converts the list of pairs into a list of strings via concatenation and we use a
+ * DB concatenation formula to match. We see SQL like:
+ * </p>
+ * <pre>{@code sql
+ *
+ *   ...
+ *   where t0.store = ?  and (t0.sku||'-'||t0.code) in (?, ? )
+ *
+ *   // bind values like: "sj2-1000", "pf3-1000"
+ *
+ * }</pre>
+ * <p>
+ * We often create a DB expression index to match the DB concat formula like:
+ * </p>
+ * <pre>{@code sql
+ *
+ *   create index ix_name on table_name ((sku || '-' || code));
+ *
+ * }</pre>
+ */
+public class Pairs {
+
+  private final String property0;
+  private final String property1;
+
+  private final List<Entry> entries = new ArrayList<>();
+
+  /**
+   * Character between the values when combined via DB varchar concatenation.
+   */
+  private String concatSeparator = "-";
+
+  /**
+   * Optional suffix added to DB varchar concatenation formula.
+   */
+  private String concatSuffix;
+
+  /**
+   * Create with 2 property names.
+   *
+   * @param property0 The property of the first value
+   * @param property1 The property of the second value
+   */
+  public Pairs(String property0, String property1) {
+    this.property0 = property0;
+    this.property1 = property1;
+  }
+
+  /**
+   * Add a pair of value objects.
+   * <p>
+   * Both values are expected to be immutable with equals and hashCode implementations.
+   * </p>
+   *
+   * @param a Value of the first property
+   * @param b Value of the second property
+   */
+  public Pairs add(Object a, Object b) {
+    entries.add(new Entry(a, b));
+    return this;
+  }
+
+  /**
+   * Return the first property name.
+   */
+  public String getProperty0() {
+    return property0;
+  }
+
+  /**
+   * Return the second property name.
+   */
+  public String getProperty1() {
+    return property1;
+  }
+
+  /**
+   * Return all the value pairs.
+   */
+  public List<Entry> getEntries() {
+    return entries;
+  }
+
+  /**
+   * Return the separator character used with DB varchar concatenation to combine the 2 values.
+   */
+  public String getConcatSeparator() {
+    return concatSeparator;
+  }
+
+  /**
+   * Set the separator character used with DB varchar concatenation to combine the 2 values.
+   */
+  public Pairs setConcatSeparator(String concatSeparator) {
+    this.concatSeparator = concatSeparator;
+    return this;
+  }
+
+  /**
+   * Return  a suffix used with DB varchar concatenation to combine the 2 values.
+   */
+  public String getConcatSuffix() {
+    return concatSuffix;
+  }
+
+  /**
+   * Add a suffix used with DB varchar concatenation to combine the 2 values.
+   */
+  public Pairs setConcatSuffix(String concatSuffix) {
+    this.concatSuffix = concatSuffix;
+    return this;
+  }
+
+  public String toString() {
+    return "p0:" + property0 + " p1:" + property1 + " entries:" + entries;
+  }
+
+  /**
+   * A pair of 2 value objects.
+   * <p>
+   * Used to support inPairs() expression.
+   */
+  public static class Entry {
+
+    private final Object a;
+    private final Object b;
+
+    /**
+     * Create with values for property0 and property1 respectively.
+     *
+     * @param a Value of the first property
+     * @param b Value of the second property
+     */
+    public Entry(Object a, Object b) {
+      this.a = a;
+      this.b = b;
+    }
+
+    public String toString() {
+      return "{" + a + "," + b + "}";
+    }
+
+    /**
+     * Return the value for the first property.
+     */
+    public Object getA() {
+      return a;
+    }
+
+    /**
+     * Return the value for the second property.
+     */
+    public Object getB() {
+      return b;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) return true;
+      if (o == null || getClass() != o.getClass()) return false;
+
+      Entry that = (Entry) o;
+      return a.equals(that.a) && b.equals(that.b);
+    }
+
+    @Override
+    public int hashCode() {
+      int result = a.hashCode();
+      result = 92821 * result + b.hashCode();
+      return result;
+    }
+  }
+}

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

@@ -59,6 +59,8 @@ class PrimaryServer {
   private static String determineDefaultServerName() {
 
     String defaultServerName = System.getenv("EBEAN_DB");
+    defaultServerName = System.getProperty("db", defaultServerName);
+    defaultServerName = System.getProperty("ebean_db", defaultServerName);
     if (isEmpty(defaultServerName)) {
       defaultServerName = System.getProperty("datasource.default");
       if (isEmpty(defaultServerName)) {
@@ -74,6 +76,7 @@ class PrimaryServer {
     if (defaultServerName == null) {
       defaultServerName = "db";
     }
+    System.setProperty("ebean_db", defaultServerName);
     return defaultServerName;
   }
 

src/main/java/io/ebean/ProfileLocation.java

@@ -0,0 +1,47 @@
+package io.ebean;
+
+/**
+ * A location for profiling transactions and queries.
+ * <p>
+ * Typically represents a class method in the form of class file and line of code that started
+ * the transaction or invoked the query.
+ * </p>
+ */
+public interface ProfileLocation {
+
+  /**
+   * Create and return a new ProfileLocation.
+   */
+  static ProfileLocation create() {
+    return XServiceProvider.profileLocationFactory().create();
+  }
+
+  /**
+   * Create and return a new ProfileLocation with a given lineNumber and label.
+   */
+  static ProfileLocation create(int lineNumber, String label) {
+    return XServiceProvider.profileLocationFactory().create(lineNumber, label);
+  }
+
+  /**
+   * Create and return a new ProfileLocation with a given location.
+   */
+  static ProfileLocation createAt(String location) {
+    return XServiceProvider.profileLocationFactory().createAt(location);
+  }
+
+  /**
+   * Obtain the location description.
+   */
+  String obtain();
+
+  /**
+   * Return a short version of the location description.
+   */
+  String shortDescription();
+
+  /**
+   * Add execution time.
+   */
+  void add(long executionTime);
+}

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

@@ -666,8 +666,7 @@ public interface Query<T> {
    * </p>
    * <p>
    * This method is functionally equivalent to findIterate() but instead of using an
-   * iterator uses the QueryEachConsumer (SAM) interface which is better suited to use
-   * with Java8 closures.
+   * iterator uses the Consumer interface which is better suited to use with Java8 closures.
    * </p>
    * <pre>{@code
    *
@@ -696,8 +695,7 @@ public interface Query<T> {
    * </p>
    * <p>
    * This method is functionally equivalent to findIterate() but instead of using an
-   * iterator uses the QueryEachWhileConsumer (SAM) interface which is better suited to use
-   * with Java8 closures.
+   * iterator uses the Predicate (SAM) interface which is better suited to use with Java8 closures.
    * </p>
    * <pre>{@code
    *
@@ -815,6 +813,21 @@ public interface Query<T> {
   @Nonnull
   <A> List<A> findSingleAttributeList();
 
+  /**
+   * Execute a query returning a single value of a single property/column.
+   * <p>
+   * <pre>{@code
+   *
+   *  String name =
+   *    Ebean.find(Customer.class)
+   *      .select("name")
+   *      .where().eq("id", 42)
+   *      .findSingleAttribute();
+   *
+   * }</pre>
+   */
+  <A> A findSingleAttribute();
+
   /**
    * Execute the query returning either a single bean or null (if no matching
    * bean is found).
@@ -1292,7 +1305,7 @@ public interface Query<T> {
    *
    * // Assuming sku is unique for products...
    *
-   * Map<?,Product> productMap =
+   * Map<String,Product> productMap =
    *     ebeanServer.find(Product.class)
    *     // use sku for keys...
    *     .setMapKey("sku")
@@ -1307,22 +1320,36 @@ public interface Query<T> {
   /**
    * Set this to false to not use the bean cache.
    * <p>
+   * This method is now superseded by {@link #setBeanCacheMode(CacheMode)}
+   * which provides more explicit options controlled bean cache use.
+   * </p>
+   * <p>
+   * This method is likely to be deprecated in the future with migration
+   * over to setUseBeanCache().
+   * </p>
+   */
+  default Query<T> setUseCache(boolean useCache) {
+    return setBeanCacheMode(useCache ? CacheMode.ON : CacheMode.OFF);
+  }
+
+  /**
+   * Set the mode to use the bean cache when executing this query.
+   * <p>
    * By default "find by id" and "find by natural key" will use the bean cache
    * when bean caching is enabled. Setting this to false means that the query
    * will not use the bean cache and instead hit the database.
    * </p>
    * <p>
-   * In the case of other queries (findList(), findEach() etc) then setting this to
-   * false beans that the if lazy loading is invoked that lazy loading will not try
-   * to use the bean cache.
+   * By default findList() with natural keys will not use the bean cache. In that
+   * case we need to explicitly use the bean cache.
    * </p>
    */
-  Query<T> setUseCache(boolean useCache);
+  Query<T> setBeanCacheMode(CacheMode beanCacheMode);
 
   /**
    * Set the {@link CacheMode} to use the query for executing this query.
    */
-  Query<T> setUseQueryCache(CacheMode useQueryCache);
+  Query<T> setUseQueryCache(CacheMode queryCacheMode);
 
   /**
    * Calls {@link #setUseQueryCache(CacheMode)} with <code>ON</code> or <code>OFF</code>.
@@ -1342,6 +1369,12 @@ public interface Query<T> {
    */
   Query<T> setProfileId(int profileId);
 
+  /**
+   * Set the profile location of this query. This is used to relate query execution metrics
+   * back to a location like a specific line of code.
+   */
+  Query<T> setProfileLocation(ProfileLocation profileLocation);
+
   /**
    * Set to true if this query should execute against the doc store.
    * <p>
@@ -1356,8 +1389,9 @@ public interface Query<T> {
   Query<T> setReadOnly(boolean readOnly);
 
   /**
-   * When set to true all the beans from this query are loaded into the bean
-   * cache.
+   * Will be deprecated - migrate to use setBeanCacheMode(CacheMode.RECACHE).
+   * <p>
+   * When set to true all the beans from this query are loaded into the bean cache.
    */
   Query<T> setLoadBeanCache(boolean loadBeanCache);
 

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

@@ -21,7 +21,7 @@ public interface RawSqlBuilder {
    * resultSet.
    */
   static RawSql resultSet(ResultSet resultSet, String... propertyNames) {
-    return XServiceProvider.get().resultSet(resultSet, propertyNames);
+    return XServiceProvider.rawSql().resultSet(resultSet, propertyNames);
   }
 
   /**
@@ -30,7 +30,7 @@ public interface RawSqlBuilder {
    * this query.
    */
   static RawSqlBuilder unparsed(String sql) {
-    return XServiceProvider.get().unparsed(sql);
+    return XServiceProvider.rawSql().unparsed(sql);
   }
 
   /**
@@ -47,7 +47,7 @@ public interface RawSqlBuilder {
    * </p>
    */
   static RawSqlBuilder parse(String sql) {
-    return XServiceProvider.get().parsed(sql);
+    return XServiceProvider.rawSql().parsed(sql);
   }
 
   /**

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

@@ -13,6 +13,23 @@ import java.sql.Connection;
  */
 public interface Transaction extends AutoCloseable {
 
+  /**
+   * Return the current transaction (of the default server) or null if there is
+   * no current transaction in scope.
+   * <p>
+   * This is the same as <code>Ebean.currentTransaction()</code>
+   * </p>
+   * <p>
+   * 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()
+   */
+  static Transaction current() {
+    return Ebean.currentTransaction();
+  }
+
   /**
    * Read Committed transaction isolation. Same as
    * java.sql.Connection.TRANSACTION_READ_COMMITTED.
@@ -42,6 +59,14 @@ public interface Transaction extends AutoCloseable {
    */
   void register(TransactionCallback callback);
 
+  /**
+   * Set a label on the transaction.
+   * <p>
+   * This label is used to group transaction execution times for performance metrics reporting.
+   * </p>
+   */
+  void setLabel(String label);
+
   /**
    * Return true if this transaction is read only.
    */

src/main/java/io/ebean/TxScope.java

@@ -48,10 +48,16 @@ public final class TxScope {
    */
   private boolean flushOnQuery = true;
 
+  private boolean skipCache;
+
+  private String label;
+
   private ArrayList<Class<? extends Throwable>> rollbackFor;
 
   private ArrayList<Class<? extends Throwable>> noRollbackFor;
 
+  private ProfileLocation profileLocation;
+
   /**
    * Helper method to create a TxScope with REQUIRES.
    */
@@ -185,6 +191,51 @@ public final class TxScope {
     return this;
   }
 
+  /**
+   * Return the profile location.
+   */
+  public ProfileLocation getProfileLocation() {
+    return profileLocation;
+  }
+
+  /**
+   * Set the profile location.
+   */
+  public TxScope setProfileLocation(ProfileLocation profileLocation) {
+    this.profileLocation = profileLocation;
+    return this;
+  }
+
+  /**
+   * Return true if the L2 cache should be skipped for this transaction.
+   */
+  public boolean isSkipCache() {
+    return skipCache;
+  }
+
+  /**
+   * Set to true if the transaction should skip L2 cache access.
+   */
+  public TxScope setSkipCache(boolean skipCache) {
+    this.skipCache = skipCache;
+    return this;
+  }
+
+  /**
+   * Return the label for the transaction.
+   */
+  public String getLabel() {
+    return label;
+  }
+
+  /**
+   * Set a label for the transaction.
+   */
+  public TxScope setLabel(String label) {
+    this.label = label;
+    return this;
+  }
+
   /**
    * Return the batch mode.
    */

src/main/java/io/ebean/UpdateQuery.java

@@ -148,6 +148,12 @@ public interface UpdateQuery<T> {
    */
   UpdateQuery<T> setRaw(String propertyExpression, Object... values);
 
+  /**
+   * Set the profile location of this update query. This is used to relate query execution metrics
+   * back to a location like a specific line of code.
+   */
+  UpdateQuery<T> setProfileLocation(ProfileLocation profileLocation);
+
   /**
    * Return the query expression list to add predicates to.
    */

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

@@ -1,5 +1,6 @@
 package io.ebean;
 
+import io.ebean.service.SpiProfileLocationFactory;
 import io.ebean.service.SpiRawSqlService;
 
 import java.util.Iterator;
@@ -10,9 +11,11 @@ import java.util.ServiceLoader;
  */
 class XServiceProvider {
 
-  private static SpiRawSqlService builder = init();
+  private static SpiRawSqlService rawSqlService = initRawSql();
 
-  private static SpiRawSqlService init() {
+  private static SpiProfileLocationFactory profileLocationFactory = initProfileLocation();
+
+  private static SpiRawSqlService initRawSql() {
 
     Iterator<SpiRawSqlService> loader = ServiceLoader.load(SpiRawSqlService.class).iterator();
     if (loader.hasNext()) {
@@ -21,10 +24,27 @@ class XServiceProvider {
     throw new IllegalStateException("No service implementation found for SpiRawSqlService?");
   }
 
+  private static SpiProfileLocationFactory initProfileLocation() {
+
+    Iterator<SpiProfileLocationFactory> loader = ServiceLoader.load(SpiProfileLocationFactory.class).iterator();
+    if (loader.hasNext()) {
+      return loader.next();
+    }
+    throw new IllegalStateException("No service implementation found for SpiProfileLocationFactory?");
+  }
+
   /**
    * Return the RawSqlService implementation.
    */
-  static SpiRawSqlService get() {
-    return builder;
+  static SpiRawSqlService rawSql() {
+    return rawSqlService;
   }
+
+  /**
+   * Return the RawSqlService implementation.
+   */
+  static SpiProfileLocationFactory profileLocationFactory() {
+    return profileLocationFactory;
+  }
+
 }

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

@@ -26,14 +26,16 @@ public final class CallStack implements Serializable {
 
   private final StackTraceElement[] callStack;
 
+  private final int hc;
+
   public CallStack(StackTraceElement[] callStack, int zeroHash, int pathHash) {
     this.callStack = callStack;
     this.zeroHash = enc(zeroHash);
     this.pathHash = enc(pathHash);
+    this.hc = computeHashCode();
   }
 
-  @Override
-  public int hashCode() {
+  private int computeHashCode() {
     int hc = 0;
     for (StackTraceElement aCallStack : callStack) {
       hc = 92821 * hc + aCallStack.hashCode();
@@ -41,6 +43,10 @@ public final class CallStack implements Serializable {
     return hc;
   }
 
+  public int hashCode() {
+    return hc;
+  }
+
   @Override
   public boolean equals(Object obj) {
     if (obj == this) {

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

@@ -13,8 +13,14 @@ import java.io.Serializable;
  */
 public interface EntityBean extends Serializable {
 
+  /**
+   * Return all the property names in defined order.
+   */
   String[] _ebean_getPropertyNames();
 
+  /**
+   * Return the property name at the given position.
+   */
   String _ebean_getPropertyName(int pos);
 
   /**

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

@@ -1,5 +1,9 @@
 package io.ebean.cache;
 
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Set;
+
 /**
  * Represents part of the "L2" server side cache.
  * <p>
@@ -13,20 +17,46 @@ package io.ebean.cache;
  */
 public interface ServerCache {
 
+  default Map<Object, Object> getAll(Set<Object> keys) {
+
+    Map<Object, Object> map = new LinkedHashMap<>();
+    for (Object key : keys) {
+      Object value = get(key);
+      if (value != null) {
+        map.put(key, value);
+      }
+    }
+    return map;
+  }
+
   /**
    * Return the value given the key.
    */
   Object get(Object id);
 
+  /**
+   * Put all the values in the cache.
+   */
+  default void putAll(Map<Object, Object> keyValues) {
+    keyValues.forEach(this::put);
+  }
+
   /**
    * Put the value in the cache with a given id.
    */
-  Object put(Object id, Object value);
+  void put(Object id, Object value);
+
+  /**
+   * Remove the entries from the cache given the id values.
+   */
+  default void removeAll(Set<Object> keys) {
+    keys.forEach(this::remove);
+  }
 
   /**
    * Remove a entry from the cache given its id.
    */
-  Object remove(Object id);
+  void remove(Object id);
 
   /**
    * Clear all entries from the cache.

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

@@ -44,4 +44,19 @@ public interface ServerCacheManager {
    */
   void clearAll();
 
+  /**
+   * Clear all the local caches.
+   *
+   * This is used when the L2 Cache is based on clustered near-caches (Like Ebean-K8s-L2Cache).
+   * It is not used when the L2 cache is a distributed cache such as HazelCast or Ignite etc.
+   */
+  void clearAllLocal();
+
+  /**
+   * Clear the local caches for this bean type.
+   *
+   * This is used when the L2 Cache is based on clustered near-caches (Like Ebean-K8s-L2Cache).
+   * It is not used when the L2 cache is a distributed cache such as HazelCast or Ignite etc.
+   */
+  void clearLocal(Class<?> beanType);
 }

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

@@ -32,6 +32,15 @@ public class AutoTuneConfig {
   public AutoTuneConfig() {
   }
 
+  /**
+   * Return true if we are profiling or query tuning.
+   *
+   * If we are not doing either then we don't need a CallStack.
+   */
+  public boolean isActive() {
+    return profiling || queryTuning;
+  }
+
   /**
    * Return the name of the file that holds the query tuning information.
    */

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

@@ -54,6 +54,22 @@ public class ClassLoadConfig {
     return isPresent("javax.validation.constraints.NotNull");
   }
 
+  /**
+   * Return true if javax PostConstruct annotation is present (maybe not in java9).
+   * If not we don't support PostConstruct lifecycle events.
+   */
+  public boolean isJavaxPostConstructPresent() {
+    return isPresent("javax.annotation.PostConstruct");
+  }
+
+  /**
+   * Return true if javax JAXB is present (maybe not in java9).
+   * If not we don't try to parse or support 'extra ddl'.
+   */
+  public boolean isJavaxJAXBPresent() {
+    return isPresent("javax.xml.bind.JAXBException");
+  }
+
   /**
    * Return true if Jackson annotations like JsonIgnore are present.
    */

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

@@ -10,22 +10,82 @@ import java.util.Properties;
  */
 public class ContainerConfig {
 
-  protected boolean clusterActive;
+  private boolean active;
+  private String serviceName;
+  private String namespace;
+  private String podName;
+  private int port;
 
-  protected Properties properties;
+  private Properties properties;
+
+  /**
+   * Return the service name.
+   */
+  public String getServiceName() {
+    return serviceName;
+  }
+
+  /**
+   * Set the service name.
+   */
+  public void setServiceName(String serviceName) {
+    this.serviceName = serviceName;
+  }
+
+  /**
+   * Return the namespace.
+   */
+  public String getNamespace() {
+    return namespace;
+  }
+
+  /**
+   * Set the namespace.
+   */
+  public void setNamespace(String namespace) {
+    this.namespace = namespace;
+  }
+
+  /**
+   * Return the pod name.
+   */
+  public String getPodName() {
+    return podName;
+  }
+
+  /**
+   * Set the pod name.
+   */
+  public void setPodName(String podName) {
+    this.podName = podName;
+  }
+
+  /**
+   * Return the port to use.
+   */
+  public int getPort() {
+    return port;
+  }
+
+  /**
+   * Set the port to use.
+   */
+  public void setPort(int port) {
+    this.port = port;
+  }
 
   /**
    * Return true if clustering is active.
    */
-  public boolean isClusterActive() {
-    return clusterActive;
+  public boolean isActive() {
+    return active;
   }
 
   /**
    * Set to true for clustering to be active.
    */
-  public void setClusterActive(boolean clusterActive) {
-    this.clusterActive = clusterActive;
+  public void setActive(boolean active) {
+    this.active = active;
   }
 
   /**
@@ -47,7 +107,14 @@ public class ContainerConfig {
    */
   public void loadFromProperties(Properties properties) {
     this.properties = properties;
-    this.clusterActive = getProperty(properties, "ebean.cluster.active", clusterActive);
+    this.active = getProperty(properties, "ebean.cluster.active", active);
+    this.serviceName = properties.getProperty("ebean.cluster.serviceName", serviceName);
+    this.namespace = properties.getProperty("ebean.cluster.namespace", namespace);
+    this.podName = properties.getProperty("ebean.cluster.podName", podName);
+    String portParam = properties.getProperty("ebean.cluster.port");
+    if (portParam != null) {
+      this.port = Integer.parseInt(portParam);
+    }
   }
 
   /**

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

@@ -16,6 +16,8 @@ public class DbMigrationConfig {
 
   protected static final Logger logger = LoggerFactory.getLogger(DbMigrationConfig.class);
 
+  protected MigrationConfig runnerConfig = new MigrationConfig();
+
   /**
    * The database platform to generate migration DDL for.
    */
@@ -105,6 +107,15 @@ public class DbMigrationConfig {
    */
   protected String dbPassword;
 
+  protected String patchInsertOn;
+
+  protected String patchResetChecksumOn;
+
+  /**
+   * Mode used to check non-null columns added via migration have a default value specified etc.
+   */
+  protected boolean strictMode = true;
+
   /**
    * Return the DB platform to generate migration DDL for.
    * <p>
@@ -352,6 +363,65 @@ public class DbMigrationConfig {
     this.dbPassword = dbPassword;
   }
 
+  /**
+   * Return migration versions that should be added to history without running.
+   */
+  public String getPatchInsertOn() {
+    return patchInsertOn;
+  }
+
+  /**
+   * Set migration versions that should be added to history without running.
+   * <p>
+   * Value can be a string containing comma delimited list of version numbers.
+   * </p>
+   */
+  public void setPatchInsertOn(String patchInsertOn) {
+    this.patchInsertOn = patchInsertOn;
+  }
+
+  /**
+   * Return migration versions that should have their checksum reset and not run.
+   */
+  public String getPatchResetChecksumOn() {
+    return patchResetChecksumOn;
+  }
+
+  /**
+   * Set migration versions that should have their checksum reset and not run.
+   * <p>
+   * Value can be a string containing comma delimited list of version numbers.
+   * </p>
+   */
+  public void setPatchResetChecksumOn(String patchResetChecksumOn) {
+    this.patchResetChecksumOn = patchResetChecksumOn;
+  }
+
+  /**
+   * Return true if strict mode is used which includes a check that non-null columns have a default value.
+   */
+  public boolean isStrictMode() {
+    String envValue = readEnvironment("ddl.migration.strictMode");
+    if (!isEmpty(envValue)) {
+      return Boolean.parseBoolean(envValue.trim());
+    }
+    return strictMode;
+  }
+
+  /**
+   * Set to false to turn off strict mode allowing non-null columns to not have a default value.
+   */
+  public void setStrictMode(boolean strictMode) {
+    this.strictMode = strictMode;
+  }
+
+  /**
+   * Return the underlying migration runner configuration allowing for more advanced settings.
+   */
+  public MigrationConfig getRunnerConfig() {
+    return runnerConfig;
+  }
+
   /**
    * Load the settings from the PropertiesWrapper.
    */
@@ -370,6 +440,8 @@ public class DbMigrationConfig {
     generate = properties.getBoolean("migration.generate", generate);
     version = properties.get("migration.version", version);
     name = properties.get("migration.name", name);
+    patchInsertOn = properties.get("migration.patchInsertOn", patchInsertOn);
+    patchResetChecksumOn = properties.get("migration.patchResetChecksumOn", patchResetChecksumOn);
 
     runMigration = properties.getBoolean("migration.run", runMigration);
     metaTable = properties.get("migration.metaTable", metaTable);
@@ -446,7 +518,6 @@ public class DbMigrationConfig {
    */
   public MigrationRunner createRunner(ClassLoader classLoader, Properties properties) {
 
-    MigrationConfig runnerConfig = new MigrationConfig();
     runnerConfig.setMetaTable(metaTable);
     runnerConfig.setApplySuffix(applySuffix);
     runnerConfig.setMigrationPath(migrationPath);
@@ -455,6 +526,12 @@ public class DbMigrationConfig {
     runnerConfig.setDbUsername(getDbUsername());
     runnerConfig.setDbPassword(getDbPassword());
     runnerConfig.setClassLoader(classLoader);
+    if (patchInsertOn != null) {
+      runnerConfig.setPatchInsertOn(patchInsertOn);
+    }
+    if (patchResetChecksumOn != null) {
+      runnerConfig.setPatchResetChecksumOn(patchResetChecksumOn);
+    }
     if (properties != null) {
       runnerConfig.load(properties);
     }

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

@@ -12,7 +12,7 @@ public interface EncryptKeyManager {
    * This gives the EncryptKeyManager the opportunity to get keys etc.
    * </p>
    */
-  default void initialise() {};
+  default void initialise() {}
 
   /**
    * Return the key used to encrypt and decrypt a property mapping to the given

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

@@ -273,11 +273,29 @@ public class ServerConfig {
    */
   private DataSource dataSource;
 
+  /**
+   * The read only data source (can be null).
+   */
+  private DataSource readOnlyDataSource;
+
   /**
    * The data source config.
    */
   private DataSourceConfig dataSourceConfig = new DataSourceConfig();
 
+  /**
+   * 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).
+   *
+   * autoReadOnlyDataSource is an unfortunate name for this config option but I haven't come up with a better one.
+   */
+  private boolean autoReadOnlyDataSource;
+
+  /**
+   * Optional configuration for a read only data source.
+   */
+  private DataSourceConfig readOnlyDataSourceConfig = new DataSourceConfig();
+
   /**
    * The db migration config (migration resource path etc).
    */
@@ -435,6 +453,11 @@ public class ServerConfig {
 
   private String jodaLocalTimeMode;
 
+  /**
+   * Time to live for query plans - defaults to 5 minutes.
+   */
+  private int queryPlanTTLSeconds = 60 * 5;
+
   /**
    * Set to true to globally disable L2 caching (typically for performance testing).
    */
@@ -1437,6 +1460,28 @@ public class ServerConfig {
     this.dataSource = dataSource;
   }
 
+  /**
+   * Return the read only DataSource.
+   */
+  public DataSource getReadOnlyDataSource() {
+    return readOnlyDataSource;
+  }
+
+  /**
+   * Set the read only DataSource.
+   * <p>
+   * Note that the DataSource is expected to use AutoCommit true mode avoiding the need
+   * for explicit commit (or rollback).
+   * </p>
+   * <p>
+   * This read only DataSource will be used for implicit query only transactions. It is not
+   * used if the transaction is created explicitly or if the query is an update or delete query.
+   * </p>
+   */
+  public void setReadOnlyDataSource(DataSource readOnlyDataSource) {
+    this.readOnlyDataSource = readOnlyDataSource;
+  }
+
   /**
    * Return the configuration to build a DataSource using Ebean's own DataSource
    * implementation.
@@ -1453,6 +1498,42 @@ public class ServerConfig {
     this.dataSourceConfig = dataSourceConfig;
   }
 
+  /**
+   * Return true if Ebean should create a DataSource for use with implicit read only transactions.
+   */
+  public boolean isAutoReadOnlyDataSource() {
+    return autoReadOnlyDataSource;
+  }
+
+  /**
+   * Set to true if Ebean should create a DataSource for use with implicit read only transactions.
+   */
+  public void setAutoReadOnlyDataSource(boolean autoReadOnlyDataSource) {
+    this.autoReadOnlyDataSource = autoReadOnlyDataSource;
+  }
+
+  /**
+   * Return the configuration for the read only DataSource.
+   * <p>
+   * This is only used if autoReadOnlyDataSource is true.
+   * </p>
+   * <p>
+   * The driver, url, username and password default to the configuration for the main DataSource if they are not
+   * set on this configuration. This means there is actually no need to set any configuration here and we only
+   * set configuration for url, username and password etc if it is different from the main DataSource.
+   * </p>
+   */
+  public DataSourceConfig getReadOnlyDataSourceConfig() {
+    return readOnlyDataSourceConfig;
+  }
+
+  /**
+   * Set the configuration for the read only DataSource.
+   */
+  public void setReadOnlyDataSourceConfig(DataSourceConfig readOnlyDataSourceConfig) {
+    this.readOnlyDataSourceConfig = readOnlyDataSourceConfig;
+  }
+
   /**
    * Return the JNDI name of the DataSource to use.
    */
@@ -2595,12 +2676,14 @@ public class ServerConfig {
       dbTypeConfig.setGeometrySRID(srid);
     }
 
+    queryPlanTTLSeconds = p.getInt("queryPlanTTLSeconds", queryPlanTTLSeconds);
     slowQueryMillis = p.getLong("slowQueryMillis", slowQueryMillis);
     docStoreOnly = p.getBoolean("docStoreOnly", docStoreOnly);
     disableL2Cache = p.getBoolean("disableL2Cache", disableL2Cache);
     explicitTransactionBeginMode = p.getBoolean("explicitTransactionBeginMode", explicitTransactionBeginMode);
     autoCommitMode = p.getBoolean("autoCommitMode", autoCommitMode);
     useJtaTransactionManager = p.getBoolean("useJtaTransactionManager", useJtaTransactionManager);
+    autoReadOnlyDataSource = p.getBoolean("autoReadOnlyDataSource", autoReadOnlyDataSource);
 
     backgroundExecutorSchedulePoolSize = p.getInt("backgroundExecutorSchedulePoolSize", backgroundExecutorSchedulePoolSize);
     backgroundExecutorShutdownSecs = p.getInt("backgroundExecutorShutdownSecs", backgroundExecutorShutdownSecs);
@@ -2817,6 +2900,20 @@ public class ServerConfig {
     this.disableL2Cache = disableL2Cache;
   }
 
+  /**
+   * Return the query plan time to live.
+   */
+  public int getQueryPlanTTLSeconds() {
+    return queryPlanTTLSeconds;
+  }
+
+  /**
+   * Set the query plan time to live.
+   */
+  public void setQueryPlanTTLSeconds(int queryPlanTTLSeconds) {
+    this.queryPlanTTLSeconds = queryPlanTTLSeconds;
+  }
+
   /**
    * Run the DB migration against the DataSource.
    */

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

@@ -16,5 +16,5 @@ public interface TenantDataSourceProvider {
   /**
    * Shutdown all the DataSources.
    */
-  default void shutdown(boolean deregisterDriver) {};
+  default void shutdown(boolean deregisterDriver) {}
 }

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

@@ -61,6 +61,8 @@ public class DatabasePlatform {
    */
   protected String closeQuote = "\"";
 
+  protected String concatOperator = "||";
+
   /**
    * When set to true all db column names and table names use quoted identifiers.
    */
@@ -227,7 +229,7 @@ public class DatabasePlatform {
    * Return true if this matches the given platform.
    */
   public boolean isPlatform(Platform platform) {
-    return this.platform.equals(platform);
+    return this.platform == platform;
   }
 
   /**
@@ -390,8 +392,6 @@ public class DatabasePlatform {
 
   /**
    * Return the close quote for quoted identifiers.
-   *
-   * @return the close quote
    */
   public String getCloseQuote() {
     return closeQuote;
@@ -399,17 +399,20 @@ public class DatabasePlatform {
 
   /**
    * Return the open quote for quoted identifiers.
-   *
-   * @return the open quote
    */
   public String getOpenQuote() {
     return openQuote;
   }
 
+  /**
+   * Return the DB concat operator.
+   */
+  public String getConcatOperator() {
+    return concatOperator;
+  }
+
   /**
    * Return the JDBC type used to store booleans.
-   *
-   * @return the boolean db type
    */
   public int getBooleanDbType() {
     return booleanDbType;

src/main/java/io/ebean/config/dbplatform/oracle/OraclePlatform.java

@@ -10,12 +10,13 @@ import io.ebean.config.dbplatform.DbType;
 import io.ebean.config.dbplatform.IdType;
 import io.ebean.config.dbplatform.PlatformIdGenerator;
 import io.ebean.config.dbplatform.RownumSqlLimiter;
+import io.ebean.config.dbplatform.SqlErrorCodes;
 
 import javax.sql.DataSource;
 import java.sql.Types;
 
 /**
- * Oracle10 and greater specific platform.
+ * Oracle specific platform.
  */
 public class OraclePlatform extends DatabasePlatform {
 
@@ -29,17 +30,23 @@ public class OraclePlatform extends DatabasePlatform {
     this.basicSqlLimiter = new BasicSqlAnsiLimiter();
     this.historySupport = new OracleDbHistorySupport();
 
-    // Not using getGeneratedKeys as instead we will
-    // batch load sequences which enables JDBC batch execution
-    dbIdentity.setSupportsGetGeneratedKeys(false);
     dbIdentity.setIdType(IdType.SEQUENCE);
     dbIdentity.setSupportsSequence(true);
+    dbIdentity.setSupportsIdentity(true);
+    dbIdentity.setSupportsGetGeneratedKeys(true);
 
     this.treatEmptyStringsAsNull = true;
 
     this.likeClause = "like ? escape '|'";
     this.specialLikeCharacters = new char[] { '%', '_', '|' };
-    
+
+    this.exceptionTranslator =
+      new SqlErrorCodes()
+        //.addAcquireLock("")
+        .addDuplicateKey("1")
+        .addDataIntegrity("2291")
+        .build();
+
     this.openQuote = "\"";
     this.closeQuote = "\"";
 
@@ -81,7 +88,7 @@ public class OraclePlatform extends DatabasePlatform {
         return sql + " for update";
     }
   }
-  
+
   @Override
   protected void escapeLikeCharacter(char ch, StringBuilder sb) {
     sb.append('|').append(ch);

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

@@ -83,6 +83,16 @@ public interface DbMigration {
    */
   void setPlatform(DatabasePlatform databasePlatform);
 
+  /**
+   * Set to false to turn off strict mode.
+   * <p>
+   * Strict mode checks that a column changed to non-null on an existing table via DB migration has a default
+   * value specified. Set this to false if that isn't the case but it is known that all the existing rows have
+   * a value specified (there are no existing null values for the column).
+   * </p>
+   */
+  void setStrictMode(boolean strictMode);
+
   /**
    * Add an additional platform to write the migration DDL.
    * <p>
@@ -101,7 +111,6 @@ public interface DbMigration {
    * <pre>{@code
    *
    *   DbMigration migration = DbMigration.create();
-   *
    *   migration.setPlatform(Platform.POSTGRES);
    *
    *   migration.generateMigration();

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

@@ -1,17 +0,0 @@
-package io.ebean.meta;
-
-import java.util.List;
-
-public interface MetaBeanInfo {
-
-  /**
-   * Collect the current query plan statistics return the non-empty statistics.
-   */
-  List<MetaQueryPlanStatistic> collectQueryPlanStatistics(boolean reset);
-
-  /**
-   * Collect the current query plan statistics return all the statistics (include query plans that haven't had query executions).
-   */
-  List<MetaQueryPlanStatistic> collectAllQueryPlanStatistics(boolean reset);
-
-}

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

@@ -8,17 +8,12 @@ import java.util.List;
 public interface MetaInfoManager {
 
   /**
-   * Return the MetaBeanInfo for a bean type.
+   * Collect and return the transaction execution metrics.
    */
-  MetaBeanInfo getMetaBeanInfo(Class<?> beanClass);
+  List<MetaTimedMetric> collectTransactionStatistics(boolean reset);
 
   /**
-   * Return all the MetaBeanInfo.
-   */
-  List<MetaBeanInfo> getMetaBeanInfoList();
-
-  /**
-   * Collect and return the query plan statistics for all the beans.
+   * 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).

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

@@ -1,5 +1,7 @@
 package io.ebean.meta;
 
+import io.ebean.ProfileLocation;
+
 import java.util.List;
 
 /**
@@ -14,6 +16,11 @@ public interface MetaQueryPlanStatistic {
    */
   Class<?> getBeanType();
 
+  /**
+   * Return the profile location.
+   */
+  ProfileLocation getProfileLocation();
+
   /**
    * Return true if this query plan was tuned by AutoTune.
    */

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

@@ -0,0 +1,43 @@
+package io.ebean.meta;
+
+
+/**
+ * Timed execution statistics.
+ */
+public interface MetaTimedMetric {
+
+  /**
+   * Return the metric name.
+   */
+  String getName();
+
+  /**
+   * Return the metric location if defined.
+   */
+  String getLocation();
+
+  /**
+   * Return the time the counters started from.
+   */
+  long getStartTime();
+
+  /**
+   * Return the total count.
+   */
+  long getCount();
+
+  /**
+   * Return the total execution time.
+   */
+  long getTotal();
+
+  /**
+   * Return the max execution time.
+   */
+  long getMax();
+
+  /**
+   * Return the mean execution time.
+   */
+  long getMean();
+}

src/main/java/io/ebean/plugin/SpiServer.java

@@ -47,4 +47,9 @@ public interface SpiServer extends EbeanServer {
    */
   DataSource getDataSource();
 
+  /**
+   * Return the associated read only DataSource for this EbeanServer instance (can be null).
+   */
+  DataSource getReadOnlyDataSource();
+
 }

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

@@ -0,0 +1,24 @@
+package io.ebean.service;
+
+import io.ebean.ProfileLocation;
+
+/**
+ * Factory for creating profile locations.
+ */
+public interface SpiProfileLocationFactory {
+
+  /**
+   * Create a profile location.
+   */
+  ProfileLocation create();
+
+  /**
+   * Create a profile location with a line number.
+   */
+  ProfileLocation create(int lineNumber, String label);
+
+  /**
+   * Create a known location.
+   */
+  ProfileLocation createAt(String location);
+}

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

@@ -0,0 +1,54 @@
+package io.ebeaninternal.api;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The results of bean cache hit.
+ */
+public class BeanCacheResult<T> {
+
+  private List<Entry<T>> list = new ArrayList<>();
+
+  /**
+   * Add an entry.
+   */
+  public void add(T bean, Object key) {
+    list.add(new Entry<>(bean, key));
+  }
+
+  /**
+   * Return the hits.
+   */
+  public List<Entry<T>> hits() {
+    return list;
+  }
+
+  /**
+   * Bean and cache key pair.
+   */
+  static class Entry<T> {
+
+    private final T bean;
+    private final Object key;
+
+    public Entry(T bean, Object key) {
+      this.bean = bean;
+      this.key = key;
+    }
+
+    /**
+     * Return the natural key or id value.
+     */
+    public Object getKey() {
+      return key;
+    }
+
+    /**
+     * Return the bean.
+     */
+    public T getBean() {
+      return bean;
+    }
+  }
+}

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

@@ -1,57 +0,0 @@
-package io.ebeaninternal.api;
-
-/**
- * A hash for a query plan.
- */
-public class HashQueryPlan {
-
-  private final String rawSql;
-
-  private final int planHash;
-
-  private final int bindCount;
-
-  public HashQueryPlan(String rawSql, int planHash, int bindCount) {
-    this.rawSql = rawSql;
-    this.planHash = planHash;
-    this.bindCount = bindCount;
-  }
-
-  @Override
-  public String toString() {
-    return planHash + ":" + bindCount + (rawSql != null ? ":r" : "");
-  }
-
-  /**
-   * Return as a partial key. For rawSql hash the sql is part of the key and as such
-   * needs to be included in order to have a complete key. Typically the MD5 of the sql
-   * can be used as a shot form proxy for the actual sql.
-   */
-  public String getPartialKey() {
-    return planHash + "_" + bindCount;
-  }
-
-  @Override
-  public int hashCode() {
-    int hc = planHash;
-    hc = hc * 92821 + bindCount;
-    hc = hc * 92821 + (rawSql == null ? 0 : rawSql.hashCode());
-    return hc;
-  }
-
-  @Override
-  public boolean equals(Object obj) {
-    if (obj == this) {
-      return true;
-    }
-    if (!(obj instanceof HashQueryPlan)) {
-      return false;
-    }
-
-    HashQueryPlan e = (HashQueryPlan) obj;
-    //noinspection StringEquality
-    return e.planHash == planHash
-      && e.bindCount == bindCount
-      && ((e.rawSql == rawSql) || (e.rawSql != null && e.rawSql.equals(rawSql)));
-  }
-}

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

@@ -1,97 +0,0 @@
-package io.ebeaninternal.api;
-
-import java.util.Set;
-
-/**
- * Used to build HashQueryPlan instances.
- */
-public class HashQueryPlanBuilder {
-
-  private int planHash;
-
-  private int bindCount;
-
-  public HashQueryPlanBuilder() {
-    this.planHash = 92821;
-  }
-
-  @Override
-  public String toString() {
-    return planHash + ":" + bindCount;
-  }
-
-  /**
-   * Add a class to the hash calculation.
-   */
-  public HashQueryPlanBuilder add(Class<?> cls) {
-    planHash = planHash * 92821 + cls.getName().hashCode();
-    return this;
-  }
-
-  /**
-   * Add an object to the hash calculation.
-   */
-  public HashQueryPlanBuilder add(Object object) {
-    planHash = planHash * 92821 + (object == null ? 0 : object.hashCode());
-    return this;
-  }
-
-  /**
-   * Add the set with order being important.
-   */
-  public HashQueryPlanBuilder addOrdered(Set<?> set) {
-    if (set == null) {
-      add(false);
-    } else {
-      add(true);
-      for (Object o : set) {
-        add(o);
-      }
-    }
-    return this;
-  }
-
-  /**
-   * Add an integer to the hash calculation.
-   */
-  public HashQueryPlanBuilder add(int hashValue) {
-    planHash = planHash * 92821 + (hashValue);
-    return this;
-  }
-
-  /**
-   * Add a boolean to the hash calculation.
-   */
-  public HashQueryPlanBuilder add(boolean booleanValue) {
-    planHash = planHash * 92821 + (booleanValue ? 92821 : 0);
-    return this;
-  }
-
-  /**
-   * Add a number to the bind count for the hash.
-   */
-  public void bind(int extraBindCount) {
-    bindCount += extraBindCount;
-  }
-
-  public void bindIfNotNull(Object someValue) {
-    if (someValue != null) {
-      bindCount++;
-    }
-  }
-
-  /**
-   * Build and return the calculated HashQueryPlan.
-   */
-  public String build() {
-    return planHash + "_" + bindCount;
-  }
-
-  public int getPlanHash() {
-    return planHash;
-  }
-
-  public int getBindCount() {
-    return bindCount;
-  }
-}

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

@@ -157,9 +157,9 @@ public class LoadBeanRequest extends LoadRequest {
     for (Object aList : list) {
       EntityBean loadedBean = (EntityBean) aList;
       loadedIds.add(desc.getId(loadedBean));
-      if (isLoadCache()) {
-        desc.cacheBeanPut(loadedBean);
-      }
+    }
+    if (isLoadCache()) {
+      desc.cacheBeanPutAll(list);
     }
 
     if (lazyLoadProperty != null) {

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

@@ -0,0 +1,86 @@
+package io.ebeaninternal.api;
+
+
+import io.ebean.Pairs;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Natural key entry with name value pairs for each of the properties making up the key.
+ */
+public class NaturalKeyEntry {
+
+  private Map<String,Object> map = new HashMap<>();
+  private Object key;
+  private Object inValue;
+
+  /**
+   * Used when query query just has a series of EQ expressions (no IN clause).
+   */
+  public NaturalKeyEntry(String[] naturalKey, List<NaturalKeyEq> eqList) {
+    load(eqList);
+    this.key = calculateKey(naturalKey);
+  }
+
+  /**
+   * Create when query uses an IN clause.
+   */
+  public NaturalKeyEntry(String[] naturalKey, List<NaturalKeyEq> eqList, String inProperty, Object inValue) {
+    load(eqList);
+    if (inProperty != null) {
+      map.put(inProperty, inValue);
+      this.inValue = inValue;
+    }
+    this.key = calculateKey(naturalKey);
+  }
+
+  /**
+   * Create when query uses an IN PAIRS clause.
+   */
+  public NaturalKeyEntry(String[] naturalKey, List<NaturalKeyEq> eqList,
+                         String inMapProperty0, String inMapProperty1, Pairs.Entry pair) {
+    load(eqList);
+    map.put(inMapProperty0, pair.getA());
+    map.put(inMapProperty1, pair.getB());
+    this.inValue = pair;
+    this.key = calculateKey(naturalKey);
+  }
+
+  private void load(List<NaturalKeyEq> eqList) {
+    if (eqList != null) {
+      for (NaturalKeyEq eq : eqList) {
+        map.put(eq.property, eq.value);
+      }
+    }
+  }
+
+  private Object calculateKey(String[] naturalKey) {
+
+    if (naturalKey.length == 1) {
+      return map.get(naturalKey[0]);
+    }
+
+    StringBuilder sb = new StringBuilder();
+    for (String key : naturalKey) {
+      sb.append(map.get(key)).append(";");
+    }
+
+    return sb.toString();
+  }
+
+  /**
+   * Return the natural cache key (String concatenation of values).
+   */
+  public Object key() {
+    return key;
+  }
+
+  /**
+   * Return the inValue (used to remove from IN clause of original query).
+   */
+  public Object getInValue() {
+    return inValue;
+  }
+}

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

@@ -0,0 +1,15 @@
+package io.ebeaninternal.api;
+
+/**
+ * A property value pair in a natural key lookup.
+ */
+public class NaturalKeyEq {
+
+  final String property;
+  final Object value;
+
+  public NaturalKeyEq(String property, Object value) {
+    this.property = property;
+    this.value = value;
+  }
+}

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

@@ -0,0 +1,219 @@
+package io.ebeaninternal.api;
+
+import io.ebean.Pairs;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Collects the data for processing the natural key cache processing.
+ */
+public class NaturalKeyQueryData<T> {
+
+  private final String[] naturalKey;
+
+  /**
+   * Only one of IN or IN PAIRS is allowed.
+   */
+  private boolean hasIn;
+
+  // IN Pairs clause - only one allowed
+  private String inProperty0, inProperty1;
+  private List<Pairs.Entry> inPairs;
+
+  // IN clause - only one allowed
+  private Collection<?> inValues;
+  private String inProperty;
+
+  // normal EQ expressions
+  private List<NaturalKeyEq> eqList;
+
+  private NaturalKeySet set;
+
+  private int hitCount;
+
+  public NaturalKeyQueryData(String[] naturalKey) {
+    this.naturalKey = naturalKey;
+  }
+
+  private boolean matchProperty(String propName) {
+
+    for (String key : naturalKey) {
+      if (key.equals(propName)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /**
+   * Match for In Pairs expression. We only allow one IN clause.
+   */
+  public boolean matchInPairs(Pairs pairs) {
+    if (hasIn) {
+      // only 1 IN allowed (to project naturalIds)
+      return false;
+    }
+    if (matchProperty(pairs.getProperty0()) && matchProperty(pairs.getProperty1())) {
+      this.hasIn = true;
+      this.inProperty0 = pairs.getProperty0();
+      this.inProperty1 = pairs.getProperty1();
+      this.inPairs = pairs.getEntries();
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * Match for IN expression. We only allow one IN clause.
+   */
+  public boolean matchIn(String propName, Collection<?> sourceValues) {
+    if (hasIn) {
+      // only 1 IN allowed (to project naturalIds)
+      return false;
+    }
+    if (matchProperty(propName)) {
+      this.hasIn = true;
+      this.inProperty = propName;
+      this.inValues = sourceValues;
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * Match for an EQ expression.
+   */
+  public boolean matchEq(String propName, Object bindValue) {
+    if (matchProperty(propName)) {
+      if (eqList == null) {
+        eqList = new ArrayList<>();
+      }
+      eqList.add(new NaturalKeyEq(propName, bindValue));
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * Build and return the set of natural keys we will use.
+   */
+  public NaturalKeySet buildKeys() {
+
+    if (!expressionCount() || !matchProperties()) {
+      return null;
+    }
+
+    this.set = new NaturalKeySet();
+    if (inValues != null) {
+      // a findList() with an IN clause so we project
+      // for every IN value a natural key combination
+      for (Object inValue : inValues) {
+        set.add(new NaturalKeyEntry(naturalKey, eqList, inProperty, inValue));
+      }
+    } else if (inPairs != null) {
+      // a findList() with an IN Map clause so we project
+      // for every IN value a natural key combination
+      for (Pairs.Entry entry : inPairs) {
+        set.add(new NaturalKeyEntry(naturalKey, eqList, inProperty0, inProperty1, entry));
+      }
+
+    } else {
+      // only one - a findOne()
+      set.add(new NaturalKeyEntry(naturalKey, eqList));
+    }
+
+    return set;
+  }
+
+  /**
+   * Return true if the properties match the natural key properties.
+   */
+  private boolean matchProperties() {
+    if (naturalKey.length == 1) {
+      // simple single property case
+      if (inProperty != null) {
+        return inProperty.equals(naturalKey[0]);
+      } else {
+        return eqList.get(0).property.equals(naturalKey[0]);
+      }
+    }
+
+    // multiple properties case
+    Set<String> exprProps = new HashSet<>();
+    if (inProperty != null) {
+      exprProps.add(inProperty);
+    }
+    if (inProperty0 != null) {
+      exprProps.add(inProperty0);
+    }
+    if (inProperty1 != null) {
+      exprProps.add(inProperty1);
+    }
+    if (eqList != null) {
+      for (NaturalKeyEq eq : eqList) {
+        exprProps.add(eq.property);
+      }
+    }
+    if (exprProps.size() != naturalKey.length) {
+      return false;
+    }
+    for (String key : naturalKey) {
+      if (!exprProps.remove(key)) {
+        return false;
+      }
+    }
+
+    return exprProps.isEmpty();
+  }
+
+  /**
+   * Check that all the natural key properties are defined.
+   */
+  private boolean expressionCount() {
+
+    int defined = (inValues == null) ? 0 : 1;
+    defined += (inPairs == null) ? 0 : 2;
+    defined += (eqList == null) ? 0 : eqList.size();
+    return defined == naturalKey.length;
+  }
+
+  /**
+   * Return the number of entries in the IN clause left remaining (to hit the DB with).
+   */
+  public boolean allHits() {
+    return hitCount > 0
+      && hitCount == set.size()
+      && (inValues == null || inValues.isEmpty());
+  }
+
+  /**
+   * Adjust the IN clause removing the hit entry.
+   */
+  public List<T> removeHits(BeanCacheResult<T> cacheResult) {
+
+    List<BeanCacheResult.Entry<T>> hits = cacheResult.hits();
+    this.hitCount = hits.size();
+
+    List<T> beans = new ArrayList<>(hitCount);
+
+    for (BeanCacheResult.Entry<T> hit : hits) {
+      if (inValues != null) {
+        Object naturalKey = hit.getKey();
+        Object inValue = set.getInValue(naturalKey);
+        inValues.remove(inValue);
+
+      } else if (inPairs != null) {
+        Object naturalKey = hit.getKey();
+        Pairs.Entry inValue = (Pairs.Entry)set.getInValue(naturalKey);
+        inPairs.remove(inValue);
+      }
+      beans.add(hit.getBean());
+    }
+
+    return beans;
+  }
+}

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

@@ -0,0 +1,31 @@
+package io.ebeaninternal.api;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Set;
+
+public class NaturalKeySet {
+
+
+  private final Map<Object, NaturalKeyEntry> map = new LinkedHashMap<>();
+
+  public NaturalKeySet() {
+  }
+
+  public int size() {
+    return map.size();
+  }
+
+  public void add(NaturalKeyEntry entry) {
+    map.put(entry.key(), entry);
+  }
+
+  public Set<Object> keys() {
+    return map.keySet();
+  }
+
+  public Object getInValue(Object naturalKey) {
+    NaturalKeyEntry entry = map.get(naturalKey);
+    return entry.getInValue();
+  }
+}

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

@@ -89,6 +89,10 @@ public class ScopeTrans {
 
   }
 
+  public String toString() {
+    return "ScopeTrans[" + transaction + "]";
+  }
+
   /**
    * Return the current/active transaction.
    */

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

@@ -25,6 +25,10 @@ public class ScopedTransaction extends SpiTransactionProxy {
     this.manager = manager;
   }
 
+  public String toString() {
+    return "ScopedTransaction[" + current + "]";
+  }
+
   /**
    * Push the scope transaction.
    */
@@ -56,6 +60,7 @@ public class ScopedTransaction extends SpiTransactionProxy {
   private void pop() {
     if (!stack.isEmpty()) {
       current = stack.pop();
+      transaction = current.getTransaction();
     } else {
       manager.set(null);
     }

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

@@ -80,6 +80,11 @@ public interface SpiEbeanServer extends EbeanServer, BeanLoader, BeanCollectionL
    */
   void clearQueryStatistics();
 
+  /**
+   * Return the transaction manager.
+   */
+  SpiTransactionManager getTransactionManager();
+
   /**
    * Return all the descriptors.
    */

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

@@ -97,4 +97,9 @@ public interface SpiExpression extends Expression {
    * Return the bind Id value if this is a "equal to" expression for the id property.
    */
   Object getIdEqualTo(String idName);
+
+  /**
+   * Check for match to a natural key query returning false if it doesn't match.
+   */
+  boolean naturalKey(NaturalKeyQueryData data);
 }

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

@@ -74,5 +74,5 @@ public interface SpiExpressionRequest {
   /**
    * Append IN expression taking into account platform and type support for Multi-value.
    */
-  void appendInExpression(boolean not, Object[] bindValues);
+  void appendInExpression(boolean not, List<Object> bindValues);
 }

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

@@ -5,6 +5,7 @@ import io.ebean.EbeanServer;
 import io.ebean.ExpressionList;
 import io.ebean.OrderBy;
 import io.ebean.PersistenceContextScope;
+import io.ebean.ProfileLocation;
 import io.ebean.Query;
 import io.ebean.bean.CallStack;
 import io.ebean.bean.ObjectGraphNode;
@@ -98,17 +99,30 @@ public interface SpiQuery<T> extends Query<T>, TxnProfileEventCodes {
     /**
      * Delete query.
      */
-    DELETE(FIND_DELETE),
+    DELETE(FIND_DELETE, true),
 
     /**
      * Update query.
      */
-    UPDATE(FIND_UPDATE);
+    UPDATE(FIND_UPDATE, true);
 
+    boolean update;
     String profileEventId;
 
     Type(String profileEventId) {
+      this(profileEventId, false);
+    }
+
+    Type(String profileEventId, boolean update) {
       this.profileEventId = profileEventId;
+      this.update = update;
+    }
+
+    /**
+     * Return true if this is an Update or Delete query (not read only).
+     */
+    public boolean isUpdate() {
+      return update;
     }
 
     public String profileEventId() {
@@ -161,9 +175,19 @@ public interface SpiQuery<T> extends Query<T>, TxnProfileEventCodes {
   short getProfileId();
 
   /**
-   * Check for a single "equal to" expression for the Id.
+   * Return the profile location for this query.
    */
-  void checkIdEqualTo();
+  ProfileLocation getProfileLocation();
+
+  /**
+   * Return true if this is a "find by id" query. This includes a check for a single "equal to" expression for the Id.
+   */
+  boolean isFindById();
+
+  /**
+   * Return true if this is a "find all" query. Used to set a "find all" profile location if necessary.
+   */
+  boolean isFindAll();
 
   /**
    * Return true if AutoTune should be attempted on this query.
@@ -366,6 +390,17 @@ public interface SpiQuery<T> extends Query<T>, TxnProfileEventCodes {
    */
   ManyWhereJoins getManyWhereJoins();
 
+  /**
+   * Reset AUTO mode to OFF for findList(). Expect explicit cache use with findList().
+   */
+  void resetBeanCacheAutoMode(boolean findOne);
+
+  /**
+   * Collect natural key data for this query or null if the query does not match
+   * the requirements of natural key lookup.
+   */
+  NaturalKeyQueryData<T> naturalKey();
+
   /**
    * Return a Natural Key bind parameter if supported by this query.
    */
@@ -579,27 +614,30 @@ public interface SpiQuery<T> extends Query<T>, TxnProfileEventCodes {
   boolean hasMaxRowsOrFirstRow();
 
   /**
-   * Return true if the bean cache should be exclude for query or lazy loading.
+   * Return true if the query should GET against bean cache.
    */
-  boolean isExcludeBeanCache();
+  boolean isBeanCacheGet();
 
   /**
-   * Return true if this query should use the bean cache.
-   * It is not skipped and bean caching is supported.
+   * Return true if the query should PUT against the bean cache.
    */
-  boolean isUseBeanCache();
+  boolean isBeanCachePut();
+
+  /**
+   * Return true if the bean cache is being explicitly loaded via RECACHE mode.
+   */
+  boolean isBeanCacheReload();
+
+  /**
+   * Return the cache mode for using the bean cache (Get and Put).
+   */
+  CacheMode getUseBeanCache();
 
   /**
    * Return the cache mode if this query should use/check the query cache.
    */
   CacheMode getUseQueryCache();
 
-  /**
-   * Return true if the beans from this query should be loaded into the bean
-   * cache.
-   */
-  boolean isLoadBeanCache();
-
   /**
    * Return true if the beans returned by this query should be read only.
    */

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

@@ -1,5 +1,6 @@
 package io.ebeaninternal.api;
 
+import io.ebean.ProfileLocation;
 import io.ebean.Transaction;
 import io.ebean.annotation.DocStoreMode;
 import io.ebean.bean.PersistenceContext;
@@ -24,6 +25,11 @@ import java.sql.SQLException;
  */
 public interface SpiTransaction extends Transaction {
 
+  /**
+   * Return the user defined label for the transaction.
+   */
+  String getLabel();
+
   /**
    * Return the string prefix with the transaction id and label used in logging.
    */
@@ -294,8 +300,23 @@ public interface SpiTransaction extends Transaction {
    */
   void profileEvent(SpiProfileTransactionEvent event);
 
+  /**
+   * Set the profileStream to catch and time all the events for this transaction.
+   */
+  void setProfileStream(ProfileStream profileStream);
+
   /**
    * Return the stream that profiling events are written to.
    */
   ProfileStream profileStream();
+
+  /**
+   * Set the profile location for this transaction.
+   */
+  void setProfileLocation(ProfileLocation profileLocation);
+
+  /**
+   * Return the profile location for this transaction.
+   */
+  ProfileLocation getProfileLocation();
 }

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

@@ -0,0 +1,37 @@
+package io.ebeaninternal.api;
+
+import io.ebean.TxScope;
+
+import javax.sql.DataSource;
+
+/**
+ * Service provider interface for the transaction manager.
+ */
+public interface SpiTransactionManager {
+
+  /**
+   * Return the main DataSource.
+   */
+  DataSource getDataSource();
+
+  /**
+   * Return the read only DataSource (if defined).
+   */
+  DataSource getReadOnlyDataSource();
+
+  /**
+   * Return the currently active transaction (can be null).
+   */
+  SpiTransaction get();
+
+  /**
+   * Push an externally managed transaction into scope (e.g. Spring managed transaction).
+   */
+  ScopedTransaction externalBeginTransaction(SpiTransaction transaction, TxScope txScope);
+
+  /**
+   * Called when an externally managed transaction has completed.
+   */
+  void externalRemoveTransaction();
+
+}

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

@@ -1,5 +1,6 @@
 package io.ebeaninternal.api;
 
+import io.ebean.ProfileLocation;
 import io.ebean.TransactionCallback;
 import io.ebean.annotation.DocStoreMode;
 import io.ebean.annotation.PersistBatch;
@@ -29,6 +30,16 @@ abstract class SpiTransactionProxy implements SpiTransaction {
     return transaction.translate(message, cause);
   }
 
+  @Override
+  public void setLabel(String label) {
+    transaction.setLabel(label);
+  }
+
+  @Override
+  public String getLabel() {
+    return transaction.getLabel();
+  }
+
   @Override
   public void commitAndContinue() {
     transaction.commitAndContinue();
@@ -49,11 +60,26 @@ abstract class SpiTransactionProxy implements SpiTransaction {
     transaction.profileEvent(event);
   }
 
+  @Override
+  public void setProfileStream(ProfileStream profileStream) {
+    transaction.setProfileStream(profileStream);
+  }
+
   @Override
   public ProfileStream profileStream() {
     return transaction.profileStream();
   }
 
+  @Override
+  public void setProfileLocation(ProfileLocation profileLocation) {
+    transaction.setProfileLocation(profileLocation);
+  }
+
+  @Override
+  public ProfileLocation getProfileLocation() {
+    return transaction.getProfileLocation();
+  }
+
   @Override
   public void setTenantId(Object tenantId) {
     transaction.setTenantId(tenantId);

src/main/java/io/ebeaninternal/dbmigration/DdlGenerator.java

@@ -36,6 +36,7 @@ public class DdlGenerator {
   private final boolean generateDdl;
   private final boolean runDdl;
   private final boolean createOnly;
+  private final boolean jaxbPresent;
 
   private CurrentModel currentModel;
   private String dropAllContent;
@@ -43,6 +44,7 @@ public class DdlGenerator {
 
   public DdlGenerator(SpiEbeanServer server, ServerConfig serverConfig) {
     this.server = server;
+    this.jaxbPresent = serverConfig.getClassLoadConfig().isJavaxJAXBPresent();
     this.generateDdl = serverConfig.isDdlGenerate();
     this.createOnly = serverConfig.isDdlCreateOnly();
     if (serverConfig.getTenantMode().isDynamicDataSource() && serverConfig.isDdlRun()) {
@@ -139,7 +141,7 @@ public class DdlGenerator {
     runScript(false, createAllContent, getCreateFileName());
 
     String ignoreExtraDdl = System.getProperty("ebean.ignoreExtraDdl");
-    if (!"true".equalsIgnoreCase(ignoreExtraDdl)) {
+    if (!"true".equalsIgnoreCase(ignoreExtraDdl) && jaxbPresent) {
       String extraApply = ExtraDdlXmlReader.buildExtra(server.getDatabasePlatform().getName());
       if (extraApply != null) {
         runScript(false, extraApply, "extra-dll");

src/main/java/io/ebeaninternal/dbmigration/DefaultDbMigration.java

@@ -2,21 +2,22 @@ package io.ebeaninternal.dbmigration;
 
 import io.ebean.Ebean;
 import io.ebean.EbeanServer;
-import io.ebean.dbmigration.DbMigration;
+import io.ebean.annotation.Platform;
 import io.ebean.config.DbConstraintNaming;
 import io.ebean.config.DbMigrationConfig;
-import io.ebean.annotation.Platform;
 import io.ebean.config.ServerConfig;
-import io.ebean.config.dbplatform.db2.DB2Platform;
 import io.ebean.config.dbplatform.DatabasePlatform;
+import io.ebean.config.dbplatform.db2.DB2Platform;
 import io.ebean.config.dbplatform.h2.H2Platform;
 import io.ebean.config.dbplatform.hsqldb.HsqldbPlatform;
-import io.ebean.config.dbplatform.sqlserver.SqlServerPlatform;
 import io.ebean.config.dbplatform.mysql.MySqlPlatform;
 import io.ebean.config.dbplatform.oracle.OraclePlatform;
 import io.ebean.config.dbplatform.postgres.PostgresPlatform;
 import io.ebean.config.dbplatform.sqlanywhere.SqlAnywherePlatform;
 import io.ebean.config.dbplatform.sqlite.SQLitePlatform;
+import io.ebean.config.dbplatform.sqlserver.SqlServerPlatform;
+import io.ebean.dbmigration.DbMigration;
+import io.ebeaninternal.api.SpiEbeanServer;
 import io.ebeaninternal.dbmigration.ddlgeneration.DdlWrite;
 import io.ebeaninternal.dbmigration.migration.Migration;
 import io.ebeaninternal.dbmigration.migrationreader.MigrationXmlWriter;
@@ -27,7 +28,6 @@ import io.ebeaninternal.dbmigration.model.MigrationVersion;
 import io.ebeaninternal.dbmigration.model.ModelContainer;
 import io.ebeaninternal.dbmigration.model.ModelDiff;
 import io.ebeaninternal.dbmigration.model.PlatformDdlWriter;
-import io.ebeaninternal.api.SpiEbeanServer;
 import io.ebeaninternal.extraddl.model.DdlScript;
 import io.ebeaninternal.extraddl.model.ExtraDdl;
 import io.ebeaninternal.extraddl.model.ExtraDdlXmlReader;
@@ -53,7 +53,7 @@ import java.util.List;
  * </p>
  * <pre>{@code
  *
- *       DefaultDbMigration migration = new DefaultDbMigration();
+ *       DbMigration migration = DbMigration.create();
  *       migration.setPathToResources("src/main/resources");
  *       migration.setPlatform(DbPlatformName.ORACLE);
  *
@@ -88,6 +88,8 @@ public class DefaultDbMigration implements DbMigration {
 
   protected DbConstraintNaming constraintNaming;
 
+  protected Boolean strictMode;
+
   /**
    * Create for offline migration generation.
    */
@@ -139,6 +141,11 @@ public class DefaultDbMigration implements DbMigration {
     }
   }
 
+  @Override
+  public void setStrictMode(boolean strictMode) {
+    this.strictMode = strictMode;
+  }
+
   /**
    * Set the specific platform to generate DDL for.
    * <p>
@@ -184,7 +191,7 @@ public class DefaultDbMigration implements DbMigration {
    * <h3>Example: Run for a single specific platform</h3>
    * <pre>{@code
    *
-   *       DefaultDbMigration migration = new DefaultDbMigration();
+   *       DbMigration migration = DbMigration.create();
    *       migration.setPathToResources("src/main/resources");
    *       migration.setPlatform(DbPlatformName.ORACLE);
    *
@@ -195,7 +202,7 @@ public class DefaultDbMigration implements DbMigration {
    * <h3>Example: Run migration generating DDL for multiple platforms</h3>
    * <pre>{@code
    *
-   *       DefaultDbMigration migration = new DefaultDbMigration();
+   *       DbMigration migration = DbMigration.create();
    *       migration.setPathToResources("src/main/resources");
    *
    *       migration.addPlatform(DbPlatformName.POSTGRES, "pg");
@@ -486,6 +493,9 @@ public class DefaultDbMigration implements DbMigration {
       databasePlatform = server.getDatabasePlatform();
       logger.debug("set platform to {}", databasePlatform.getName());
     }
+    if (strictMode != null && migrationConfig != null) {
+      migrationConfig.setStrictMode(strictMode);
+    }
   }
 
   /**

src/main/java/io/ebeaninternal/dbmigration/ddlgeneration/platform/BaseTableDdl.java

@@ -5,6 +5,7 @@ import io.ebean.config.NamingConvention;
 import io.ebean.config.ServerConfig;
 import io.ebean.config.dbplatform.DbHistorySupport;
 import io.ebean.config.dbplatform.IdType;
+import io.ebean.util.StringHelper;
 import io.ebeaninternal.dbmigration.ddlgeneration.DdlBuffer;
 import io.ebeaninternal.dbmigration.ddlgeneration.DdlWrite;
 import io.ebeaninternal.dbmigration.ddlgeneration.TableDdl;
@@ -24,7 +25,6 @@ import io.ebeaninternal.dbmigration.migration.DropTable;
 import io.ebeaninternal.dbmigration.migration.ForeignKey;
 import io.ebeaninternal.dbmigration.migration.UniqueConstraint;
 import io.ebeaninternal.dbmigration.model.MTable;
-import io.ebean.util.StringHelper;
 
 import java.io.IOException;
 import java.math.BigInteger;
@@ -74,7 +74,7 @@ public class BaseTableDdl implements TableDdl {
    */
   protected Map<String, HistoryTableUpdate> regenerateHistoryTriggers = new LinkedHashMap<>();
 
-  private boolean strict;
+  private boolean strictMode;
 
   private final boolean sql2011History;
 
@@ -91,25 +91,24 @@ public class BaseTableDdl implements TableDdl {
     /**
      * Constructor for DdlMigrationHelp when adding a NEW column.
      */
-    DdlMigrationHelp(String tableName, Column column) throws IOException {
+    DdlMigrationHelp(String tableName, Column column) {
       this.tableName = tableName;
       this.columnName = column.getName();
       this.defaultValue = platformDdl.convertDefaultValue(column.getDefaultValue());
       boolean alterNotNull = Boolean.TRUE.equals(column.isNotnull());
 
       if (column.getBefore().isEmpty() && alterNotNull && defaultValue == null) {
-        handleStrictError("non-null column has no default value: " + tableName + "." + columnName);
+        handleStrictError(tableName, columnName);
       }
 
       before = getScriptsForPlatform(column.getBefore(), platformDdl.getPlatform().getName());
       after = getScriptsForPlatform(column.getAfter(), platformDdl.getPlatform().getName());
-
     }
 
     /**
      * Constructor for DdlMigrationHelp when altering a column.
      */
-    DdlMigrationHelp(AlterColumn alter) throws IOException {
+    DdlMigrationHelp(AlterColumn alter) {
       this.tableName = alter.getTableName();
       this.columnName = alter.getColumnName();
 
@@ -120,18 +119,16 @@ public class BaseTableDdl implements TableDdl {
       // here we add the platform's default update script
       if (alter.getBefore().isEmpty() && alterNotNull) {
         if (defaultValue == null) {
-          handleStrictError("non-null column has no default value: " + tableName + "." + columnName);
+          handleStrictError(tableName, columnName);
         }
         before = Arrays.asList(platformDdl.getUpdateNullWithDefault());
       } else {
         before = getScriptsForPlatform(alter.getBefore(), platformDdl.getPlatform().getName());
       }
-
       after = getScriptsForPlatform(alter.getAfter(), platformDdl.getPlatform().getName());
-
     }
 
-    public void writeBefore(DdlBuffer buffer) throws IOException {
+    void writeBefore(DdlBuffer buffer) throws IOException {
       if (!before.isEmpty()) {
         buffer.end();
       }
@@ -141,8 +138,8 @@ public class BaseTableDdl implements TableDdl {
       }
     }
 
-    public void writeAfter(DdlBuffer buffer) throws IOException {
-      // here we run postmigration scripts
+    void writeAfter(DdlBuffer buffer) throws IOException {
+      // here we run post migration scripts
       for (String ddlScript : after) {
         buffer.append(translate(ddlScript, tableName, columnName, defaultValue));
         buffer.endOfStatement();
@@ -175,11 +172,10 @@ public class BaseTableDdl implements TableDdl {
       return StringHelper.replaceString(ret, "${default}", defaultValue);
     }
 
-    private void handleStrictError(String message) {
-      if (strict) {
+    private void handleStrictError(String tableName, String columnName) {
+      if (strictMode) {
+        String message = "DB Migration of non-null column with no default value specified for: " + tableName + "." + columnName+" Use @DbDefault to specify a default value or specify dbMigration.setStrictMode(false)";
         throw new IllegalArgumentException(message);
-      } else {
-        System.err.println("Error in DDL: " + message);
       }
     }
 
@@ -198,7 +194,7 @@ public class BaseTableDdl implements TableDdl {
     this.historyTableSuffix = serverConfig.getHistoryTableSuffix();
     this.platformDdl = platformDdl;
     this.platformDdl.configure(serverConfig);
-    this.strict = true; // TODO RPr serverConfig.getMigrationConfig().isStrict();
+    this.strictMode = serverConfig.getMigrationConfig().isStrictMode();
     DbHistorySupport hist = platformDdl.getPlatform().getHistorySupport();
     this.sql2011History = hist != null && hist.isStandardsBased();
   }

src/main/java/io/ebeaninternal/dbmigration/ddlgeneration/platform/Oracle10Ddl.java

@@ -19,6 +19,7 @@ public class Oracle10Ddl extends PlatformDdl {
     this.columnSetNotnull = "not null";
     this.columnSetNull = "null";
     this.columnSetDefault = "default";
+    this.identitySuffix = " generated always as identity";
   }
 
 }

src/main/java/io/ebeaninternal/dbmigration/model/MigrationVersion.java

@@ -52,6 +52,8 @@ public class MigrationVersion implements Comparable<MigrationVersion> {
    * Return true if this is a "repeatable" version.
    */
   public boolean isRepeatable() {
+    // Clarification: The comparison here is intended to compare object references and not the content of the arrays.
+    // This is a kind of shortcut to see if some configuration is in place that results in the use of something other than the default.
     return ordering == REPEAT_ORDERING;
   }
 
@@ -110,6 +112,8 @@ public class MigrationVersion implements Comparable<MigrationVersion> {
    */
   private String formattedVersion(boolean normalised, boolean nextVersion) {
 
+    // Clarification: The comparison here is intended to compare object references and not the content of the arrays.
+    // This is a kind of shortcut to see if some configuration is in place that results in the use of something other than the default.
     if (ordering == REPEAT_ORDERING) {
       return "R";
     }

src/main/java/io/ebeaninternal/json/ModifyAwareList.java

@@ -5,6 +5,7 @@ import java.util.Iterator;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.ListIterator;
+import java.util.Objects;
 
 /**
  * Modify aware wrapper of a list.
@@ -32,6 +33,19 @@ public class ModifyAwareList<E> implements List<E>, ModifyAwareOwner {
     return list.toString();
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (!(o instanceof ModifyAwareList)) return false;
+    ModifyAwareList<?> that = (ModifyAwareList<?>) o;
+    return Objects.equals(list, that.list);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(list);
+  }
+
   @Override
   public boolean isMarkedDirty() {
     return owner.isMarkedDirty();

src/main/java/io/ebeaninternal/json/ModifyAwareMap.java

@@ -3,6 +3,7 @@ package io.ebeaninternal.json;
 import java.util.Collection;
 import java.util.LinkedHashSet;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 
 /**
@@ -19,14 +20,14 @@ public class ModifyAwareMap<K, V> implements Map<K, V>, ModifyAwareOwner {
    */
   final Map<K, V> map;
 
-  public ModifyAwareMap(Map<K, V> underyling) {
-    this.map = underyling;
+  public ModifyAwareMap(Map<K, V> underlying) {
+    this.map = underlying;
     this.owner = new ModifyAwareFlag();
   }
 
-  public ModifyAwareMap(ModifyAwareOwner owner, Map<K, V> underyling) {
+  public ModifyAwareMap(ModifyAwareOwner owner, Map<K, V> underlying) {
     this.owner = owner;
-    this.map = underyling;
+    this.map = underlying;
   }
 
   @Override
@@ -34,6 +35,19 @@ public class ModifyAwareMap<K, V> implements Map<K, V>, ModifyAwareOwner {
     return map.toString();
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (!(o instanceof ModifyAwareMap)) return false;
+    ModifyAwareMap<?, ?> that = (ModifyAwareMap<?, ?>) o;
+    return Objects.equals(map, that.map);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(map);
+  }
+
   @Override
   public boolean isMarkedDirty() {
     return owner.isMarkedDirty();

src/main/java/io/ebeaninternal/json/ModifyAwareSet.java

@@ -2,6 +2,7 @@ package io.ebeaninternal.json;
 
 import java.util.Collection;
 import java.util.Iterator;
+import java.util.Objects;
 import java.util.Set;
 
 /**
@@ -51,6 +52,19 @@ public class ModifyAwareSet<E> implements Set<E>, ModifyAwareOwner {
     return set.toString();
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (!(o instanceof ModifyAwareSet)) return false;
+    ModifyAwareSet<?> that = (ModifyAwareSet<?>) o;
+    return Objects.equals(set, that.set);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(set);
+  }
+
   @Override
   public boolean add(E o) {
     if (set.add(o)) {

src/main/java/io/ebeaninternal/metric/MetricFactory.java

@@ -0,0 +1,25 @@
+package io.ebeaninternal.metric;
+
+/**
+ * Factory to create timed metric counters.
+ */
+public interface MetricFactory {
+
+  /**
+   * Return the factory instance.
+   */
+  static MetricFactory get() {
+    return MetricServiceProvider.get();
+  }
+
+  /**
+   * Create a timed metric group.
+   */
+  TimedMetricMap createTimedMetricMap(String name);
+
+  /**
+   * Create a Timed metric.
+   */
+  TimedMetric createTimedMetric(String name);
+
+}

src/main/java/io/ebeaninternal/metric/MetricServiceProvider.java

@@ -0,0 +1,31 @@
+package io.ebeaninternal.metric;
+
+import io.ebeaninternal.server.profile.DMetricFactory;
+
+import java.util.Iterator;
+import java.util.ServiceLoader;
+
+/**
+ * Lookup MetricFactory service.
+ */
+class MetricServiceProvider {
+
+  private static MetricFactory metricFactory = init();
+
+  private static MetricFactory init() {
+
+    Iterator<MetricFactory> loader = ServiceLoader.load(MetricFactory.class).iterator();
+    if (loader.hasNext()) {
+      return loader.next();
+    }
+    return new DMetricFactory();
+  }
+
+  /**
+   * Return the MetricFactory implementation.
+   */
+  static MetricFactory get() {
+    return metricFactory;
+  }
+
+}

src/main/java/io/ebeaninternal/metric/TimedMetric.java

@@ -0,0 +1,31 @@
+package io.ebeaninternal.metric;
+
+import io.ebean.meta.MetaTimedMetric;
+
+import java.util.List;
+
+/**
+ * Metric for timed events like transaction execution times.
+ */
+public interface TimedMetric {
+
+  /**
+   * Add a time event (usually in microseconds).
+   */
+  void add(long value);
+
+  /**
+   * Return true if there are no metrics collected since the last collection.
+   */
+  boolean isEmpty();
+
+  /**
+   * Collect the timed metric statistics.
+   */
+  TimedMetricStats collect(boolean reset);
+
+  /**
+   * Add non empty metrics to the result.
+   */
+  void collect(boolean reset, List<MetaTimedMetric> result);
+}

src/main/java/io/ebeaninternal/metric/TimedMetricMap.java

@@ -0,0 +1,21 @@
+package io.ebeaninternal.metric;
+
+import io.ebean.meta.MetaTimedMetric;
+
+import java.util.List;
+
+/**
+ * A map of timed metrics keyed by a string.
+ */
+public interface TimedMetricMap {
+
+  /**
+   * Add an execution for the given key.
+   */
+  void add(String key, long exeMicros);
+
+  /**
+   * Add non empty metrics to the given result.
+   */
+  void collect(boolean reset, List<MetaTimedMetric> result);
+}

src/main/java/io/ebeaninternal/metric/TimedMetricStats.java

@@ -0,0 +1,14 @@
+package io.ebeaninternal.metric;
+
+import io.ebean.meta.MetaTimedMetric;
+
+/**
+ * Extend public MetaTimedMetric with ability to set details from profile location.
+ */
+public interface TimedMetricStats extends MetaTimedMetric {
+
+  /**
+   * Additionally set the location.
+   */
+  void setLocation(String location);
+}

src/main/java/io/ebeaninternal/server/autotune/service/BaseQueryTuner.java

@@ -144,7 +144,7 @@ public class BaseQueryTuner {
       default:
         // not using autoTune when explicitly loading the l2 bean cache
         // or when using Versions query
-        return !query.isLoadBeanCache() && SpiQuery.TemporalMode.VERSIONS != query.getTemporalMode();
+        return !query.isBeanCacheReload() && SpiQuery.TemporalMode.VERSIONS != query.getTemporalMode();
     }
   }
 

src/main/java/io/ebeaninternal/server/cache/CacheChangeSet.java

@@ -122,8 +122,7 @@ public class CacheChangeSet {
    */
   private ManyChange many(BeanDescriptor<?> desc, String manyProperty) {
     ManyKey key = new ManyKey(desc, manyProperty);
-    ManyChange manyChange = manyChangeMap.computeIfAbsent(key, ManyChange::new);
-    return manyChange;
+    return manyChangeMap.computeIfAbsent(key, ManyChange::new);
   }
 
   /**

src/main/java/io/ebeaninternal/server/cache/CacheManagerOptions.java

@@ -0,0 +1,85 @@
+package io.ebeaninternal.server.cache;
+
+import io.ebean.cache.ServerCacheFactory;
+import io.ebean.cache.ServerCacheOptions;
+import io.ebean.config.CurrentTenantProvider;
+import io.ebean.config.ServerConfig;
+import io.ebeaninternal.server.cluster.ClusterManager;
+
+/**
+ * Configuration options when creating the default cache manager.
+ */
+public class CacheManagerOptions {
+
+  private final ClusterManager clusterManager;
+
+  private final ServerConfig serverConfig;
+
+  private final boolean localL2Caching;
+
+  private CurrentTenantProvider currentTenantProvider;
+
+  private ServerCacheFactory cacheFactory = new DefaultServerCacheFactory();
+  private ServerCacheOptions beanDefault = new ServerCacheOptions();
+  private ServerCacheOptions queryDefault = new ServerCacheOptions();
+
+  CacheManagerOptions() {
+    this.localL2Caching = true;
+    this.clusterManager = null;
+    this.serverConfig = null;
+    this.cacheFactory = new DefaultServerCacheFactory();
+    this.beanDefault = new ServerCacheOptions();
+    this.queryDefault = new ServerCacheOptions();
+  }
+
+  public CacheManagerOptions(ClusterManager clusterManager, ServerConfig serverConfig, boolean localL2Caching) {
+    this.clusterManager = clusterManager;
+    this.serverConfig = serverConfig;
+    this.localL2Caching = localL2Caching;
+    this.currentTenantProvider = serverConfig.getCurrentTenantProvider();
+  }
+
+  public CacheManagerOptions with(ServerCacheOptions beanDefault, ServerCacheOptions queryDefault) {
+    this.beanDefault = beanDefault;
+    this.queryDefault = queryDefault;
+    return this;
+  }
+
+  public CacheManagerOptions with(ServerCacheFactory cacheFactory) {
+    this.cacheFactory = cacheFactory;
+    return this;
+  }
+
+  public CacheManagerOptions with(CurrentTenantProvider currentTenantProvider) {
+    this.currentTenantProvider = currentTenantProvider;
+    return this;
+  }
+
+  public String getServerName() {
+    return (serverConfig == null) ? "db" : serverConfig.getName();
+  }
+
+  public boolean isLocalL2Caching() {
+    return localL2Caching;
+  }
+
+  public ServerCacheFactory getCacheFactory() {
+    return cacheFactory;
+  }
+
+  public ServerCacheOptions getBeanDefault() {
+    return beanDefault;
+  }
+
+  public ServerCacheOptions getQueryDefault() {
+    return queryDefault;
+  }
+
+  public CurrentTenantProvider getCurrentTenantProvider() {
+    return currentTenantProvider;
+  }
+
+  public ClusterManager getClusterManager() {
+    return clusterManager;
+  }
+}

src/main/java/io/ebeaninternal/server/cache/DefaultCacheAdapter.java

@@ -44,12 +44,21 @@ public class DefaultCacheAdapter implements ServerCacheManager {
 
   @Override
   public void clear(Class<?> beanType) {
-    cacheManager.getBeanCache(beanType).clear();
-    cacheManager.getQueryCache(beanType).clear();
+    cacheManager.clear(beanType);
   }
 
   @Override
   public void clearAll() {
     cacheManager.clearAll();
   }
+
+  @Override
+  public void clearAllLocal() {
+    cacheManager.clearAllLocal();
+  }
+
+  @Override
+  public void clearLocal(Class<?> beanType) {
+    cacheManager.clearLocal(beanType);
+  }
 }

src/main/java/io/ebeaninternal/server/cache/DefaultCacheHolder.java

@@ -8,16 +8,24 @@ import io.ebean.cache.ServerCacheOptions;
 import io.ebean.cache.ServerCacheType;
 import io.ebean.config.CurrentTenantProvider;
 import io.ebean.util.AnnotationUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentSkipListSet;
 
 /**
  * Manages the construction of caches.
  */
 class DefaultCacheHolder {
 
+  private static final Logger log = LoggerFactory.getLogger("io.ebean.cache.ALL");
+
   private final ConcurrentHashMap<String, ServerCache> allCaches = new ConcurrentHashMap<>();
 
+  private final ConcurrentHashMap<String, Set<String>> collectIdCaches = new ConcurrentHashMap<>();
+
   private final ServerCacheFactory cacheFactory;
 
   private final ServerCacheOptions beanDefault;
@@ -25,6 +33,10 @@ class DefaultCacheHolder {
 
   private final CurrentTenantProvider tenantProvider;
 
+  DefaultCacheHolder(CacheManagerOptions builder) {
+    this(builder.getCacheFactory(), builder.getBeanDefault(), builder.getQueryDefault(), builder.getCurrentTenantProvider());
+  }
+
   /**
    * Create with a cache factory and default cache options.
    *
@@ -42,7 +54,6 @@ class DefaultCacheHolder {
   ServerCache getCache(Class<?> beanType, String cacheKey, ServerCacheType type) {
 
     return getCacheInternal(beanType, cacheKey, type);
-
   }
 
   private String key(String cacheKey, ServerCacheType type) {
@@ -60,16 +71,43 @@ class DefaultCacheHolder {
 
   private ServerCache createCache(Class<?> beanType, ServerCacheType type, String key) {
     ServerCacheOptions options = getCacheOptions(beanType, type);
-    
+    if (type == ServerCacheType.COLLECTION_IDS) {
+      synchronized (this) {
+        collectIdCaches.computeIfAbsent(beanType.getName(), s -> new ConcurrentSkipListSet<>()).add(key);
+      }
+    }
     return cacheFactory.createCache(type, key, tenantProvider, options);
   }
 
   void clearAll() {
+    log.debug("clearAll");
     for (ServerCache serverCache : allCaches.values()) {
       serverCache.clear();
     }
   }
 
+
+  public void clear(String name) {
+    log.debug("clear {}", name);
+    clearIfExists(key(name, ServerCacheType.QUERY));
+    clearIfExists(key(name, ServerCacheType.BEAN));
+    clearIfExists(key(name, ServerCacheType.NATURAL_KEY));
+    Set<String> keys = collectIdCaches.get(name);
+    if (keys != null) {
+      for (String collectionIdKey : keys) {
+        clearIfExists(collectionIdKey);
+      }
+    }
+  }
+
+  private void clearIfExists(String fullKey) {
+    ServerCache cache = allCaches.get(fullKey);
+    if (cache != null) {
+      log.trace("clear cache {}", fullKey);
+      cache.clear();
+    }
+  }
+
   /**
    * Return the cache options for a given bean type.
    */

src/main/java/io/ebeaninternal/server/cache/DefaultServerCache.java

@@ -6,15 +6,14 @@ import io.ebean.cache.ServerCacheOptions;
 import io.ebean.cache.ServerCacheStatistics;
 import io.ebean.cache.TenantAwareKey;
 import io.ebean.config.CurrentTenantProvider;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.Serializable;
-import java.util.List;
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.TimeUnit;
@@ -217,20 +216,23 @@ public class DefaultServerCache implements ServerCache {
     }
   }
 
+  @Override
+  public void putAll(Map<Object, Object> keyValues) {
+    keyValues.forEach(this::put);
+  }
+
   /**
    * Put a value into the cache.
    */
   @Override
-  public Object put(Object id, Object value) {
+  public void put(Object id, Object value) {
 
     Object key = key(id);
     CacheEntry entry = map.put(key, new CacheEntry(key, value));
     if (entry == null) {
       insertCount.increment();
-      return null;
     } else {
       updateCount.increment();
-      return entry.getValue();
     }
   }
 
@@ -238,14 +240,11 @@ public class DefaultServerCache implements ServerCache {
    * Remove an entry from the cache.
    */
   @Override
-  public Object remove(Object id) {
+  public void remove(Object id) {
 
     CacheEntry entry = map.remove(key(id));
-    if (entry == null) {
-      return null;
-    } else {
+    if (entry != null) {
       removeCount.increment();
-      return entry.getValue();
     }
   }
 
@@ -359,10 +358,8 @@ public class DefaultServerCache implements ServerCache {
     private static final long serialVersionUID = 1L;
 
     @Override
-    public int compare(CacheEntry entry1, CacheEntry entry2) {
-      long x = entry1.getLastAccessTime();
-      long y = entry2.getLastAccessTime();
-      return (x < y) ? -1 : ((x == y) ? 0 : 1);
+    public int compare(CacheEntry e1, CacheEntry e2) {
+      return Long.compare(e1.getLastAccessTime(), e2.getLastAccessTime());
     }
   }
 

src/main/java/io/ebeaninternal/server/cache/DefaultServerCacheManager.java

@@ -1,34 +1,37 @@
 package io.ebeaninternal.server.cache;
 
 import io.ebean.cache.ServerCache;
-import io.ebean.cache.ServerCacheFactory;
-import io.ebean.cache.ServerCacheOptions;
 import io.ebean.cache.ServerCacheType;
-import io.ebean.config.CurrentTenantProvider;
+import io.ebeaninternal.server.cluster.ClusterManager;
 
 /**
  * Manages the bean and query caches.
  */
 public class DefaultServerCacheManager implements SpiCacheManager {
 
+  private final ClusterManager clusterManager;
+
   private final DefaultCacheHolder cacheHolder;
 
   private final boolean localL2Caching;
 
+  private final String serverName;
+
   /**
    * Create with a cache factory and default cache options.
    */
-  public DefaultServerCacheManager(boolean localL2Caching, CurrentTenantProvider tenantProvider, ServerCacheFactory cacheFactory,
-                                   ServerCacheOptions beanDefault, ServerCacheOptions queryDefault) {
-    this.localL2Caching = localL2Caching;
-    this.cacheHolder = new DefaultCacheHolder(cacheFactory, beanDefault, queryDefault, tenantProvider);
+  public DefaultServerCacheManager(CacheManagerOptions builder) {
+    this.clusterManager = builder.getClusterManager();
+    this.serverName = builder.getServerName();
+    this.localL2Caching = builder.isLocalL2Caching();
+    this.cacheHolder = new DefaultCacheHolder(builder);
   }
 
   /**
    * Construct when l2 cache is disabled.
    */
   public DefaultServerCacheManager() {
-    this(true, null, new DefaultServerCacheFactory(), new ServerCacheOptions(), new ServerCacheOptions());
+    this(new CacheManagerOptions());
   }
 
   @Override
@@ -42,6 +45,27 @@ public class DefaultServerCacheManager implements SpiCacheManager {
   @Override
   public void clearAll() {
     cacheHolder.clearAll();
+    if (clusterManager != null) {
+      clusterManager.cacheClearAll(serverName);
+    }
+  }
+
+  @Override
+  public void clearAllLocal() {
+    cacheHolder.clearAll();
+  }
+
+  @Override
+  public void clear(Class<?> beanType) {
+    cacheHolder.clear(name(beanType));
+    if (clusterManager != null) {
+      clusterManager.cacheClear(serverName, beanType);
+    }
+  }
+
+  @Override
+  public void clearLocal(Class<?> beanType) {
+    cacheHolder.clear(name(beanType));
   }
 
   @Override

src/main/java/io/ebeaninternal/server/cache/RemoteCacheEvent.java

@@ -0,0 +1,93 @@
+package io.ebeaninternal.server.cache;
+
+import io.ebeaninternal.server.cluster.BinaryMessage;
+import io.ebeaninternal.server.cluster.BinaryMessageList;
+
+import java.io.DataInput;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Cache events broadcast across the cluster.
+ */
+public class RemoteCacheEvent {
+
+  private boolean clearAll;
+
+  private List<String> clearCaches;
+
+  /**
+   * Clear all the caches.
+   */
+  public RemoteCacheEvent(boolean clearAll) {
+    this.clearAll = clearAll;
+    this.clearCaches = null;
+  }
+
+  /**
+   * Clear caches for the given bean type.
+   */
+  public RemoteCacheEvent(Class<?> beanType) {
+    this.clearAll = false;
+    this.clearCaches = new ArrayList<>(1);
+    this.clearCaches.add(beanType.getName());
+  }
+
+  /**
+   * Create with the read options.
+   */
+  public RemoteCacheEvent(boolean clearAll, List<String> beanTypes) {
+    this.clearAll = clearAll;
+    this.clearCaches = beanTypes;
+  }
+
+  public boolean isClearAll() {
+    return clearAll;
+  }
+
+  public List<String> getClearCaches() {
+    return clearCaches;
+  }
+
+  public String toString() {
+    return "clearAll:" + clearAll + " caches:" + clearCaches;
+  }
+
+  public static RemoteCacheEvent readBinaryMessage(DataInput dataInput) throws IOException {
+
+    boolean clearAll = dataInput.readBoolean();
+    int size = dataInput.readInt();
+
+    List<String> clearCache = null;
+    if (size > 0) {
+      clearCache = new ArrayList<>(size);
+      for (int i = 0; i < size; i++) {
+        clearCache.add(dataInput.readUTF());
+      }
+    }
+
+    return new RemoteCacheEvent(clearAll, clearCache);
+  }
+
+  public void writeBinaryMessage(BinaryMessageList msgList) throws IOException {
+
+    int bufferSize = (clearCaches == null) ? 0 : clearCaches.size() * 30;
+
+    BinaryMessage msg = new BinaryMessage(bufferSize + 10);
+    DataOutputStream os = msg.getOs();
+    os.writeInt(BinaryMessage.TYPE_CACHE);
+    os.writeBoolean(clearAll);
+    if (clearCaches == null) {
+      os.writeInt(0);
+    } else {
+      os.writeInt(clearCaches.size());
+      for (String cacheName : clearCaches) {
+        os.writeUTF(cacheName);
+      }
+    }
+    msgList.add(msg);
+
+  }
+}

src/main/java/io/ebeaninternal/server/cache/SpiCacheManager.java

@@ -36,9 +36,24 @@ public interface SpiCacheManager {
    */
   ServerCache getQueryCache(Class<?> beanType);
 
+  /**
+   * Clear the caches for the given bean type.
+   */
+  void clear(Class<?> beanType);
+
   /**
    * Clear all the caches.
    */
   void clearAll();
 
+  /**
+   * Clear all local caches.
+   */
+  void clearAllLocal();
+
+  /**
+   * Clear local caches for the given bean type.
+   */
+  void clearLocal(Class<?> beanType);
+
 }

src/main/java/io/ebeaninternal/server/cluster/BinaryMessage.java

@@ -23,6 +23,7 @@ public class BinaryMessage {
   public static final int TYPE_MSGCONTROL = 0;
   public static final int TYPE_BEANIUD = 1;
   public static final int TYPE_TABLEIUD = 2;
+  public static final int TYPE_CACHE = 3;
 
   public static final int TYPE_MSGACK = 8;
   public static final int TYPE_MSGRESEND = 9;

src/main/java/io/ebeaninternal/server/cluster/BinaryMessageList.java

@@ -5,12 +5,10 @@ import java.util.List;
 
 /**
  * Holds a List of BinaryMessage's.
- *
- * @author rbygrave
  */
 public class BinaryMessageList {
 
-  final ArrayList<BinaryMessage> list = new ArrayList<>();
+  final List<BinaryMessage> list = new ArrayList<>();
 
   public void add(BinaryMessage msg) {
     list.add(msg);

src/main/java/io/ebeaninternal/server/cluster/ClusterBroadcast.java

@@ -24,5 +24,4 @@ public interface ClusterBroadcast {
    * Send a transaction event to all the members of the cluster.
    */
   void broadcast(RemoteTransactionEvent remoteTransEvent);
-
 }

src/main/java/io/ebeaninternal/server/cluster/ClusterBroadcastFactory.java

@@ -1,6 +1,6 @@
 package io.ebeaninternal.server.cluster;
 
-import java.util.Properties;
+import io.ebean.config.ContainerConfig;
 
 /**
  * Factory to create the cluster broadcast service.
@@ -10,5 +10,5 @@ public interface ClusterBroadcastFactory {
   /**
    * Create the cluster transport with the manager and deployment properties.
    */
-  ClusterBroadcast create(ClusterManager manager, Properties properties);
+  ClusterBroadcast create(ClusterManager manager, ContainerConfig config);
 }

src/main/java/io/ebeaninternal/server/cluster/ClusterManager.java

@@ -17,8 +17,6 @@ public class ClusterManager {
 
   private static final Logger clusterLogger = LoggerFactory.getLogger("io.ebean.Cluster");
 
-  private static final Logger logger = LoggerFactory.getLogger(ClusterManager.class);
-
   private final ConcurrentHashMap<String, EbeanServer> serverMap = new ConcurrentHashMap<>();
 
   private final Object monitor = new Object();
@@ -27,12 +25,14 @@ public class ClusterManager {
 
   private boolean started;
 
+  private boolean shutdown;
+
   public ClusterManager(ContainerConfig config) {
-    if (!config.isClusterActive()) {
-      broadcast = null;
+    ClusterBroadcastFactory factory = createFactory();
+    if (factory != null) {
+      broadcast = factory.create(this, config);
     } else {
-      ClusterBroadcastFactory factory = createFactory();
-      broadcast = factory.create(this, config.getProperties());
+      broadcast = null;
     }
   }
 
@@ -47,10 +47,6 @@ public class ClusterManager {
     if (iterator.hasNext()) {
       factory = iterator.next();
     }
-    if (factory == null) {
-      throw new IllegalStateException("No ClusterTransportFactory found in classpath. "
-        + " Probably need to add the avaje-ebeanorm-cluster dependency");
-    }
     return factory;
   }
 
@@ -76,6 +72,24 @@ public class ClusterManager {
     }
   }
 
+  /**
+   * Broadcast a cache clear all event to the cluster.
+   */
+  public void cacheClearAll(String serverName) {
+    if (broadcast != null) {
+      broadcast.broadcast(new RemoteTransactionEvent(serverName).cacheClearAll());
+    }
+  }
+
+  /**
+   * Broadcast a cache clear event to the cluster.
+   */
+  public void cacheClear(String serverName, Class<?> beanType) {
+    if (broadcast != null) {
+      broadcast.broadcast(new RemoteTransactionEvent(serverName).cacheClear(beanType));
+    }
+  }
+
   /**
    * Return true if clustering is on.
    */
@@ -99,8 +113,8 @@ public class ClusterManager {
    * Shutdown the service and Deregister from the cluster.
    */
   public void shutdown() {
-    if (broadcast != null) {
-      logger.info("ClusterManager shutdown ");
+    if (broadcast != null && !shutdown) {
+      shutdown = true;
       broadcast.shutdown();
     }
   }

src/main/java/io/ebeaninternal/server/core/BaseDbExpression.java

@@ -0,0 +1,19 @@
+package io.ebeaninternal.server.core;
+
+/**
+ * Not supported JSON or ARRAY expression handler.
+ */
+abstract class BaseDbExpression implements DbExpressionHandler {
+
+  private final String concatOperator;
+
+  BaseDbExpression(String concatOperator) {
+    this.concatOperator = concatOperator;
+  }
+
+  @Override
+  public String getConcatOperator() {
+    return concatOperator;
+  }
+
+}

src/main/java/io/ebeaninternal/server/core/BasicDbExpression.java

@@ -6,7 +6,11 @@ import io.ebeaninternal.server.expression.Op;
 /**
  * Not supported JSON or ARRAY expression handler.
  */
-public class NotSupportedDbExpression implements DbExpressionHandler {
+public class BasicDbExpression extends BaseDbExpression {
+
+  BasicDbExpression(String concatOperator) {
+    super(concatOperator);
+  }
 
   @Override
   public void json(SpiExpressionRequest request, String propName, String path, Op operator, Object value) {

src/main/java/io/ebeaninternal/server/core/CObjectGraphNodeStatistics.java

@@ -21,10 +21,14 @@ public class CObjectGraphNodeStatistics {
 
   private final AtomicLong startTime = new AtomicLong(System.currentTimeMillis());
 
-  public CObjectGraphNodeStatistics(ObjectGraphNode node) {
+  CObjectGraphNodeStatistics(ObjectGraphNode node) {
     this.node = node;
   }
 
+  public boolean isEmpty() {
+    return count.sum() == 0;
+  }
+
   public void add(long beanCount, long exeMicros) {
     count.increment();
     totalTime.add(exeMicros);

src/main/java/io/ebeaninternal/server/core/CacheOptions.java

@@ -15,7 +15,7 @@ public class CacheOptions {
   private final boolean enableBeanCache;
   private final boolean enableQueryCache;
   private final boolean readOnly;
-  private final String naturalKey;
+  private final String[] naturalKey;
 
   /**
    * Construct for no caching.
@@ -30,7 +30,7 @@ public class CacheOptions {
   /**
    * Construct with cache annotation.
    */
-  public CacheOptions(Cache cache, String naturalKey) {
+  public CacheOptions(Cache cache, String[] naturalKey) {
     enableBeanCache = cache.enableBeanCache();
     enableQueryCache = cache.enableQueryCache();
     readOnly = cache.readOnly();
@@ -61,7 +61,7 @@ public class CacheOptions {
   /**
    * Return the natural key property name.
    */
-  public String getNaturalKey() {
+  public String[] getNaturalKey() {
     return naturalKey;
   }
 }

src/main/java/io/ebeaninternal/server/core/CallStackFactory.java

@@ -10,5 +10,5 @@ public interface CallStackFactory {
   /**
    * Create and return the CallStack given the stack trace elements.
    */
-  CallStack createCallStack(StackTraceElement[] finalTrace);
+  CallStack createCallStack();
 }

src/main/java/io/ebeaninternal/server/core/DbExpressionHandler.java

@@ -8,6 +8,11 @@ import io.ebeaninternal.server.expression.Op;
  */
 public interface DbExpressionHandler {
 
+  /**
+   * Return the DB concat operator (Usually SQL standard "||").
+   */
+  String getConcatOperator();
+
   /**
    * Write the db platform specific json expression.
    */

src/main/java/io/ebeaninternal/server/core/DefaultBeanLoader.java

@@ -265,7 +265,7 @@ public class DefaultBeanLoader {
       if (desc.lazyLoadMany(ebi)) {
         return;
       }
-      if (!draft && SpiQuery.Mode.LAZYLOAD_BEAN.equals(mode) && desc.isBeanCaching()) {
+      if (!draft && Mode.LAZYLOAD_BEAN == mode && desc.isBeanCaching()) {
         // lazy loading and the bean cache is active
         if (desc.cacheBeanLoad(bean, ebi, id, pc)) {
           return;
@@ -292,7 +292,7 @@ public class DefaultBeanLoader {
     query.setMode(mode);
     query.setId(id);
 
-    if (embeddedOwnerIndex > -1 || mode.equals(SpiQuery.Mode.REFRESH_BEAN)) {
+    if (embeddedOwnerIndex > -1 || mode == Mode.REFRESH_BEAN) {
       // make sure the query doesn't use the cache
       query.setUseCache(false);
     }
@@ -301,7 +301,7 @@ public class DefaultBeanLoader {
       query.setReadOnly(true);
     }
 
-    if (SpiQuery.Mode.REFRESH_BEAN.equals(mode)) {
+    if (Mode.REFRESH_BEAN == mode) {
       // explicitly state to load all properties on REFRESH.
       // Lobs default to fetch lazy so this forces lobs to be
       // included in a 'refresh' query

src/main/java/io/ebeaninternal/server/core/DefaultCallStackFactory.java

@@ -2,13 +2,56 @@ package io.ebeaninternal.server.core;
 
 import io.ebean.bean.CallStack;
 
+import java.util.Arrays;
+
 /**
  * Default CallStackFactory where the Hash function for StackTraceElement includes the line number.
  */
 public class DefaultCallStackFactory implements CallStackFactory {
 
+  private static final int IGNORE_LEADING_ELEMENTS = 5;
+
+  private static final String IO_EBEAN = "io.ebean";
+
+  private final int maxCallStack;
+
+  DefaultCallStackFactory(int maxCallStack) {
+    this.maxCallStack = maxCallStack;
+  }
+
   @Override
-  public CallStack createCallStack(StackTraceElement[] finalTrace) {
+  public CallStack createCallStack() {
+     StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
+
+    // ignore the first 6 as they are always avaje stack elements
+    int startIndex = IGNORE_LEADING_ELEMENTS;
+
+    // find the first non-avaje stackElement
+    for (; startIndex < stackTrace.length; startIndex++) {
+      if (!stackTrace[startIndex].getClassName().startsWith(IO_EBEAN)) {
+        break;
+      }
+    }
+
+    int stackLength = stackTrace.length - startIndex;
+    if (stackLength > maxCallStack) {
+      // maximum of maxCallStack stackTrace elements
+      stackLength = maxCallStack;
+    }
+
+    // create the 'interesting' part of the stackTrace
+    StackTraceElement[] finalTrace = new StackTraceElement[stackLength];
+    System.arraycopy(stackTrace, startIndex, finalTrace, 0, stackLength);
+
+    if (stackLength < 1) {
+      // this should not really happen
+      throw new RuntimeException("StackTraceElement size 0?  stack: " + Arrays.toString(stackTrace));
+    }
+
+    return createCallStack(finalTrace);
+  }
+
+  private CallStack createCallStack(StackTraceElement[] finalTrace) {
     return new CallStack(finalTrace, finalTrace[0].hashCode(), pathHash(finalTrace));
   }
 

src/main/java/io/ebeaninternal/server/core/DefaultContainer.java

@@ -4,7 +4,6 @@ import io.ebean.BackgroundExecutor;
 import io.ebean.cache.ServerCacheFactory;
 import io.ebean.cache.ServerCacheOptions;
 import io.ebean.cache.ServerCachePlugin;
-import io.ebean.service.SpiContainer;
 import io.ebean.config.ContainerConfig;
 import io.ebean.config.PropertyMap;
 import io.ebean.config.ServerConfig;
@@ -12,10 +11,12 @@ import io.ebean.config.TenantMode;
 import io.ebean.config.UnderscoreNamingConvention;
 import io.ebean.config.dbplatform.DatabasePlatform;
 import io.ebean.config.dbplatform.h2.H2Platform;
-import io.ebeaninternal.dbmigration.DbOffline;
+import io.ebean.service.SpiContainer;
 import io.ebeaninternal.api.SpiBackgroundExecutor;
 import io.ebeaninternal.api.SpiContainerBootup;
 import io.ebeaninternal.api.SpiEbeanServer;
+import io.ebeaninternal.dbmigration.DbOffline;
+import io.ebeaninternal.server.cache.CacheManagerOptions;
 import io.ebeaninternal.server.cache.DefaultServerCacheManager;
 import io.ebeaninternal.server.cache.DefaultServerCachePlugin;
 import io.ebeaninternal.server.cache.SpiCacheManager;
@@ -71,6 +72,7 @@ public class DefaultContainer implements SpiContainer {
 
   @Override
   public void shutdown() {
+    clusterManager.shutdown();
     ShutdownManager.shutdown();
   }
 
@@ -114,7 +116,7 @@ public class DefaultContainer implements SpiContainer {
         serverConfig.setDatabasePlatform(new H2Platform());
       } else {
         TenantMode tenantMode = serverConfig.getTenantMode();
-        if (!TenantMode.DB.equals(tenantMode)) {
+        if (TenantMode.DB != tenantMode) {
           setDataSource(serverConfig);
           if (!tenantMode.isDynamicDataSource()) {
             // check the autoCommit and Transaction Isolation
@@ -201,7 +203,11 @@ public class DefaultContainer implements SpiContainer {
     }
 
     ServerCacheFactory factory = plugin.create(serverConfig, executor);
-    return new DefaultServerCacheManager(localL2Caching, serverConfig.getCurrentTenantProvider(), factory, beanOptions, queryOptions);
+
+    CacheManagerOptions builder = new CacheManagerOptions(clusterManager, serverConfig, localL2Caching)
+      .with(beanOptions, queryOptions)
+      .with(factory);
+    return new DefaultServerCacheManager(builder);
   }
 
   /**
@@ -272,18 +278,21 @@ public class DefaultContainer implements SpiContainer {
    */
   private void setDataSource(ServerConfig config) {
     if (config.getDataSource() == null) {
-      config.setDataSource(getDataSourceFromConfig(config));
+      config.setDataSource(getDataSourceFromConfig(config, false));
+    }
+    if (config.getReadOnlyDataSource() == null && config.isAutoReadOnlyDataSource()) {
+      config.setReadOnlyDataSource(getDataSourceFromConfig(config, true));
     }
   }
 
-  private DataSource getDataSourceFromConfig(ServerConfig config) {
+  private DataSource getDataSourceFromConfig(ServerConfig config, boolean readOnly) {
 
     if (isOfflineMode(config)) {
       logger.debug("... DbOffline using platform [{}]", DbOffline.getPlatform());
       return null;
     }
 
-    if (config.getDataSourceJndiName() != null) {
+    if (!readOnly && config.getDataSourceJndiName() != null) {
       DataSource ds = jndiDataSourceFactory.lookup(config.getDataSourceJndiName());
       if (ds == null) {
         throw new PersistenceException("JNDI lookup for DataSource " + config.getDataSourceJndiName() + " returned null.");
@@ -292,7 +301,7 @@ public class DefaultContainer implements SpiContainer {
       }
     }
 
-    DataSourceConfig dsConfig = config.getDataSourceConfig();
+    DataSourceConfig dsConfig = (readOnly) ? config.getReadOnlyDataSourceConfig() : config.getDataSourceConfig();
     if (dsConfig == null) {
       throw new PersistenceException("No DataSourceConfig defined for " + config.getName());
     }
@@ -317,7 +326,14 @@ public class DefaultContainer implements SpiContainer {
 
     attachListener(config, dsConfig);
 
-    return factory.createPool(config.getName(), dsConfig);
+    if (readOnly) {
+      // setup to use AutoCommit such that we skip explicit commit
+      dsConfig.setAutoCommit(true);
+      //dsConfig.setReadOnly(true);
+      dsConfig.setDefaults(config.getDataSourceConfig());
+    }
+    String poolName = config.getName() + (readOnly ? "-ro" : "");
+    return factory.createPool(poolName, dsConfig);
   }
 
   /**

src/main/java/io/ebeaninternal/server/core/DefaultMetaInfoManager.java

@@ -1,9 +1,11 @@
 package io.ebeaninternal.server.core;
 
-import io.ebean.meta.MetaBeanInfo;
 import io.ebean.meta.MetaInfoManager;
 import io.ebean.meta.MetaObjectGraphNodeStats;
 import io.ebean.meta.MetaQueryPlanStatistic;
+import io.ebean.meta.MetaTimedMetric;
+import io.ebeaninternal.server.deploy.BeanDescriptor;
+import io.ebeaninternal.server.query.CQueryPlanStatsCollector;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -15,41 +17,32 @@ public class DefaultMetaInfoManager implements MetaInfoManager {
 
   private final DefaultServer server;
 
-  public DefaultMetaInfoManager(DefaultServer server) {
+  DefaultMetaInfoManager(DefaultServer server) {
     this.server = server;
   }
 
   @Override
-  public MetaBeanInfo getMetaBeanInfo(Class<?> beanClass) {
-    return server.getBeanDescriptor(beanClass);
-  }
-
-  @Override
-  public List<MetaBeanInfo> getMetaBeanInfoList() {
-
-    return new ArrayList<>(server.getBeanDescriptors());
+  public List<MetaTimedMetric> collectTransactionStatistics(boolean reset) {
+    return server.collectTransactionStatistics(reset);
   }
 
   @Override
   public List<MetaQueryPlanStatistic> collectQueryPlanStatistics(boolean reset) {
 
-    List<MetaQueryPlanStatistic> list = new ArrayList<>();
-    for (MetaBeanInfo metaBeanInfo : getMetaBeanInfoList()) {
-      list.addAll(metaBeanInfo.collectQueryPlanStatistics(reset));
+    CQueryPlanStatsCollector collector = new CQueryPlanStatsCollector(reset);
+    for (BeanDescriptor<?> desc : server.getBeanDescriptors()) {
+      desc.collectQueryPlanStatistics(collector);
     }
-    return list;
+    return collector.getList();
   }
 
   @Override
   public List<MetaObjectGraphNodeStats> collectNodeStatistics(boolean reset) {
 
     List<MetaObjectGraphNodeStats> list = new ArrayList<>();
-
     for (CObjectGraphNodeStatistics nodeStatistics : server.objectGraphStats.values()) {
-      MetaObjectGraphNodeStats nodeStats = nodeStatistics.get(reset);
-      if (nodeStats.getCount() > 0) {
-        // Only collection non-empty statistics
-        list.add(nodeStats);
+      if (!nodeStatistics.isEmpty()) {
+        list.add(nodeStatistics.get(reset));
       }
     }
     return list;

src/main/java/io/ebeaninternal/server/core/DefaultServer.java

@@ -12,6 +12,7 @@ import io.ebean.FutureList;
 import io.ebean.FutureRowCount;
 import io.ebean.PagedList;
 import io.ebean.PersistenceContextScope;
+import io.ebean.ProfileLocation;
 import io.ebean.Query;
 import io.ebean.QueryIterator;
 import io.ebean.SqlQuery;
@@ -25,7 +26,6 @@ import io.ebean.UpdateQuery;
 import io.ebean.ValuePair;
 import io.ebean.Version;
 import io.ebean.annotation.TxIsolation;
-import io.ebean.annotation.TxType;
 import io.ebean.bean.BeanCollection;
 import io.ebean.bean.CallStack;
 import io.ebean.bean.EntityBean;
@@ -46,6 +46,7 @@ import io.ebean.event.BeanPersistController;
 import io.ebean.event.readaudit.ReadAuditLogger;
 import io.ebean.event.readaudit.ReadAuditPrepare;
 import io.ebean.meta.MetaInfoManager;
+import io.ebean.meta.MetaTimedMetric;
 import io.ebean.plugin.BeanType;
 import io.ebean.plugin.Plugin;
 import io.ebean.plugin.SpiServer;
@@ -53,7 +54,6 @@ import io.ebean.text.csv.CsvReader;
 import io.ebean.text.json.JsonContext;
 import io.ebeaninternal.api.LoadBeanRequest;
 import io.ebeaninternal.api.LoadManyRequest;
-import io.ebeaninternal.api.ScopeTrans;
 import io.ebeaninternal.api.ScopedTransaction;
 import io.ebeaninternal.api.SpiBackgroundExecutor;
 import io.ebeaninternal.api.SpiEbeanServer;
@@ -61,10 +61,12 @@ import io.ebeaninternal.api.SpiJsonContext;
 import io.ebeaninternal.api.SpiQuery;
 import io.ebeaninternal.api.SpiQuery.Type;
 import io.ebeaninternal.api.SpiTransaction;
+import io.ebeaninternal.api.SpiTransactionManager;
 import io.ebeaninternal.api.TransactionEventTable;
 import io.ebeaninternal.dbmigration.DdlGenerator;
 import io.ebeaninternal.dbmigration.ddlgeneration.DdlHandler;
 import io.ebeaninternal.server.autotune.AutoTuneService;
+import io.ebeaninternal.server.cache.RemoteCacheEvent;
 import io.ebeaninternal.server.core.timezone.DataTimeZone;
 import io.ebeaninternal.server.deploy.BeanDescriptor;
 import io.ebeaninternal.server.deploy.BeanDescriptorManager;
@@ -91,7 +93,6 @@ import io.ebeaninternal.server.text.csv.TCsvReader;
 import io.ebeaninternal.server.transaction.DefaultPersistenceContext;
 import io.ebeaninternal.server.transaction.RemoteTransactionEvent;
 import io.ebeaninternal.server.transaction.TransactionManager;
-import io.ebeaninternal.server.transaction.TransactionScopeManager;
 import io.ebeaninternal.util.ParamTypeHelper;
 import io.ebeaninternal.util.ParamTypeHelper.TypeInfo;
 import io.ebeanservice.docstore.api.DocStoreIntegration;
@@ -102,7 +103,6 @@ import javax.persistence.NonUniqueResultException;
 import javax.persistence.OptimisticLockException;
 import javax.persistence.PersistenceException;
 import javax.sql.DataSource;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.List;
@@ -122,10 +122,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   private static final Logger logger = LoggerFactory.getLogger(DefaultServer.class);
 
-  private static final int IGNORE_LEADING_ELEMENTS = 5;
-
-  private static final String IO_EBEAN = "io.ebean";
-
   private final ServerConfig serverConfig;
 
   private final String serverName;
@@ -134,19 +130,9 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   private final TransactionManager transactionManager;
 
-  private final TransactionScopeManager transactionScopeManager;
-
   private final DataTimeZone dataTimeZone;
 
-  private final CallStackFactory callStackFactory = new DefaultCallStackFactory();
-
-  private final int maxCallStack;
-
-  /**
-   * Ebean defaults this to true but for EJB compatible behaviour set this to
-   * false;
-   */
-  private final boolean rollbackOnChecked;
+  private final CallStackFactory callStackFactory;
 
   /**
    * Handles the save, delete, updateSql CallableSql.
@@ -253,9 +239,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     this.updateAllPropertiesInBatch = serverConfig.isUpdateAllPropertiesInBatch();
     this.collectQueryOrigins = serverConfig.isCollectQueryOrigins();
     this.collectQueryStatsByNode = serverConfig.isCollectQueryStatsByNode();
-    this.maxCallStack = serverConfig.getMaxCallStack();
-
-    this.rollbackOnChecked = serverConfig.isTransactionRollbackOnChecked();
+    this.callStackFactory = initCallStackFactory(serverConfig);
 
     this.persister = config.createPersister(this);
     this.queryEngine = config.createOrmQueryEngine();
@@ -271,7 +255,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
     DocStoreIntegration docStoreComponents = config.createDocStoreIntegration(this);
     this.transactionManager = config.createTransactionManager(docStoreComponents.updateProcessor());
-    this.transactionScopeManager = config.createTransactionScopeManager(transactionManager);
     this.documentStore = docStoreComponents.documentStore();
 
     this.serverPlugins = config.getPlugins();
@@ -283,6 +266,17 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     ShutdownManager.registerEbeanServer(this);
   }
 
+  /**
+   * Create the CallStackFactory depending if AutoTune is being used.
+   */
+  private CallStackFactory initCallStackFactory(ServerConfig serverConfig) {
+    if (!serverConfig.getAutoTuneConfig().isActive()) {
+      // use a common CallStack for performance as we don't care with no AutoTune
+      return new NoopCallStackFactory();
+    }
+    return new DefaultCallStackFactory(serverConfig.getMaxCallStack());
+  }
+
   private void configureServerPlugins() {
 
     autoTuneService.startup();
@@ -379,6 +373,11 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     return transactionManager.getDataSource();
   }
 
+  @Override
+  public DataSource getReadOnlyDataSource() {
+    return transactionManager.getReadOnlyDataSource();
+  }
+
   @Override
   public ReadAuditPrepare getReadAuditPrepare() {
     return readAuditPrepare;
@@ -402,7 +401,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    * Start any services after registering with the ClusterManager.
    */
   public void start() {
-    if (!TenantMode.DB.equals(serverConfig.getTenantMode())) {
+    if (TenantMode.DB != serverConfig.getTenantMode()) {
       serverConfig.runDbMigration(serverConfig.getDataSource());
     }
   }
@@ -553,12 +552,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public void externalModification(TransactionEventTable tableEvent) {
-    SpiTransaction t = transactionScopeManager.get();
-    if (t != null) {
-      t.getEvent().add(tableEvent);
-    } else {
-      transactionManager.externalModification(tableEvent);
-    }
+    transactionManager.externalModification(tableEvent);
   }
 
   /**
@@ -619,7 +613,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     id = desc.convertId(id);
 
     PersistenceContext pc = null;
-    SpiTransaction t = transactionScopeManager.get();
+    SpiTransaction t = transactionManager.get();
     if (t != null) {
       pc = t.getPersistenceContext();
       Object existing = desc.contextGet(pc, id);
@@ -658,8 +652,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public Transaction createTransaction() {
-
-    return transactionManager.createTransaction(0, true, -1);
+    return transactionManager.createTransaction(true, -1);
   }
 
   /**
@@ -670,8 +663,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public Transaction createTransaction(TxIsolation isolation) {
-
-    return transactionManager.createTransaction(0, true, isolation.getLevel());
+    return transactionManager.createTransaction(true, isolation.getLevel());
   }
 
   @Override
@@ -681,7 +673,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> T executeCall(TxScope scope, Callable<T> c) {
-    ScopedTransaction scopeTrans = scopedTransaction(scope);
+    ScopedTransaction scopeTrans = transactionManager.beginScopedTransaction(scope);
     try {
       return c.call();
 
@@ -703,7 +695,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public void execute(TxScope scope, Runnable r) {
-    ScopedTransaction t = scopedTransaction(scope);
+    ScopedTransaction t = transactionManager.beginScopedTransaction(scope);
     try {
       r.run();
 
@@ -718,45 +710,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     }
   }
 
-  /**
-   * Determine whether to create a new transaction or not.
-   * <p>
-   * This will also potentially throw exceptions for MANDATORY and NEVER types.
-   * </p>
-   */
-  private boolean createNewTransaction(SpiTransaction t, TxScope scope) {
-
-    TxType type = scope.getType();
-    switch (type) {
-      case REQUIRED:
-        return t == null;
-
-      case REQUIRES_NEW:
-        return true;
-
-      case MANDATORY:
-        if (t == null) {
-          throw new PersistenceException("Transaction missing when MANDATORY");
-        }
-        return false;
-
-      case NEVER:
-        if (t != null) {
-          throw new PersistenceException("Transaction exists for Transactional NEVER");
-        }
-        return false;
-
-      case SUPPORTS:
-        return false;
-
-      case NOT_SUPPORTED:
-        throw new RuntimeException("NOT_SUPPORTED should already be handled?");
-
-      default:
-        throw new RuntimeException("Should never get here?");
-    }
-  }
-
   @Override
   public void scopedTransactionEnter(TxScope txScope) {
     beginTransaction(txScope);
@@ -764,8 +717,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public void scopedTransactionExit(Object returnOrThrowable, int opCode) {
-    ScopedTransaction st = (ScopedTransaction) transactionScopeManager.getScoped();
-    st.complete(returnOrThrowable, opCode);
+    transactionManager.exitScopedTransaction(returnOrThrowable, opCode);
   }
 
   /**
@@ -773,7 +725,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public SpiTransaction currentServerTransaction() {
-    return transactionScopeManager.get();
+    return transactionManager.get();
   }
 
   /**
@@ -792,51 +744,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public Transaction beginTransaction(TxScope txScope) {
-    return scopedTransaction(txScope);
-  }
-
-  /**
-   * Create a Scoped transaction which internally can 'nest' transactions on it's own stack.
-   */
-  ScopedTransaction scopedTransaction(TxScope txScope) {
-
-    txScope = initTxScope(txScope);
-
-    boolean setToScope = false;
-    ScopedTransaction txnContainer = (ScopedTransaction) transactionScopeManager.get();
-    if (txnContainer == null) {
-      setToScope = true;
-      txnContainer = new ScopedTransaction(transactionScopeManager);
-    }
-
-    SpiTransaction transaction = txnContainer.current();
-
-    boolean createTransaction;
-    if (txScope.getType() == TxType.NOT_SUPPORTED) {
-      createTransaction = false;
-      transaction = null;
-    } else {
-      createTransaction = createNewTransaction(transaction, txScope);
-      if (createTransaction) {
-        transaction = transactionManager.createTransaction(txScope.getProfileId(), true, txScope.getIsolationLevel());
-      }
-    }
-
-    txnContainer.push(new ScopeTrans(rollbackOnChecked, createTransaction, transaction, txScope));
-    if (setToScope) {
-      transactionScopeManager.set(txnContainer);
-    }
-    return txnContainer;
-  }
-
-  private TxScope initTxScope(TxScope txScope) {
-    if (txScope == null) {
-      return new TxScope();
-    } else {
-      // check for implied batch mode via setting batchSize
-      txScope.checkBatchMode();
-      return txScope;
-    }
+    return transactionManager.beginScopedTransaction(txScope);
   }
 
   /**
@@ -848,9 +756,10 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   @Override
   public Transaction beginTransaction(TxIsolation isolation) {
     // start an explicit transaction
-    SpiTransaction t = transactionManager.createTransaction(0, true, isolation.getLevel());
+    SpiTransaction t = transactionManager.createTransaction(true, isolation.getLevel());
     try {
-      transactionScopeManager.set(t);
+      // note that we are not supporting nested scoped transactions in this case
+      transactionManager.set(t);
     } catch (PersistenceException existingTransactionError) {
       t.end();
       throw existingTransactionError;
@@ -864,7 +773,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public Transaction currentTransaction() {
-    return transactionScopeManager.get();
+    return transactionManager.get();
   }
 
   @Override
@@ -877,7 +786,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public void commitTransaction() {
-    transactionScopeManager.commit();
+    transactionManager.scope().commit();
   }
 
   /**
@@ -885,7 +794,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public void rollbackTransaction() {
-    transactionScopeManager.rollback();
+    transactionManager.scope().rollback();
   }
 
   /**
@@ -918,7 +827,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public void endTransaction() {
-    transactionScopeManager.end();
+    transactionManager.scope().end();
   }
 
   /**
@@ -1099,6 +1008,9 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   private <T> SpiOrmQueryRequest<T> createQueryRequest(SpiQuery<T> query, Transaction t) {
 
+    if (t == null) {
+      t = currentServerTransaction();
+    }
     query.setDefaultRawSqlIfRequired();
     if (query.isAutoTunable() && !autoTuneService.tuneQuery(query)) {
       // use deployment FetchType.LAZY/EAGER annotations
@@ -1108,6 +1020,10 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
     query.selectAllForLazyLoadProperty();
 
+    ProfileLocation profileLocation = query.getProfileLocation();
+    if (profileLocation != null) {
+      profileLocation.obtain();
+    }
     // if determine cost and no origin for AutoTune
     if (query.getParentNode() == null) {
       query.setOrigin(createCallStack());
@@ -1149,7 +1065,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
       }
     }
 
-    if (!query.isUseBeanCache() || (t != null && t.isSkipCache())) {
+    if (!query.isBeanCacheGet() || (t != null && t.isSkipCache())) {
       return null;
     }
 
@@ -1161,7 +1077,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    * Return true if transactions PersistenceContext should be used.
    */
   private <T> boolean useTransactionPersistenceContext(SpiQuery<T> query) {
-    return PersistenceContextScope.TRANSACTION.equals(getPersistenceContextScope(query));
+    return PersistenceContextScope.TRANSACTION == getPersistenceContextScope(query);
   }
 
   /**
@@ -1178,7 +1094,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
     SpiQuery<T> spiQuery = (SpiQuery<T>) query;
     spiQuery.setType(Type.BEAN);
-    if (SpiQuery.Mode.NORMAL.equals(spiQuery.getMode()) && !spiQuery.isLoadBeanCache()) {
+    if (SpiQuery.Mode.NORMAL == spiQuery.getMode() && !spiQuery.isBeanCacheReload()) {
       // See if we can skip doing the fetch completely by getting the bean from the
       // persistence context or the bean cache
       T bean = findIdCheckPersistenceContextAndCache(t, spiQuery, spiQuery.getId());
@@ -1188,6 +1104,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     }
 
     SpiOrmQueryRequest<T> request = createQueryRequest(spiQuery, t);
+    request.profileLocationById();
     if (request.isUseDocStore()) {
       return docStore().find(request);
     }
@@ -1209,29 +1126,17 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   public <T> T findOne(Query<T> query, Transaction transaction) {
 
     SpiQuery<T> spiQuery = (SpiQuery<T>) query;
-    spiQuery.checkIdEqualTo();
-    Object id = spiQuery.getId();
-    if (id != null) {
+    if (spiQuery.isFindById()) {
       // actually a find by Id query
       return findId(query, transaction);
     }
 
-    SpiTransaction t = (SpiTransaction) transaction;
-    if (t == null) {
-      t = currentServerTransaction();
-    }
-    if (t == null || !t.isSkipCache()) {
-      id = spiQuery.getBeanDescriptor().cacheNaturalKeyIdLookup(spiQuery);
-      if (id != null) {
-        T bean = findIdCheckPersistenceContextAndCache(t, spiQuery, id);
-        if (bean != null) {
-          return bean;
-        }
-      }
+    if (transaction == null) {
+      transaction = currentServerTransaction();
     }
 
     // a query that is expected to return either 0 or 1 beans
-    List<T> list = findList(query, t);
+    List<T> list = findList(query, transaction, true);
     return extractUnique(list);
   }
 
@@ -1514,14 +1419,23 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   }
 
   @Override
-  @SuppressWarnings("unchecked")
   public <T> List<T> findList(Query<T> query, Transaction t) {
+    return findList(query, t, false);
+  }
+
+  @SuppressWarnings("unchecked")
+  private <T> List<T> findList(Query<T> query, Transaction t, boolean findOne) {
 
     SpiOrmQueryRequest<T> request = createQueryRequest(Type.LIST, query, t);
+    request.profileLocationAll();
+    request.resetBeanCacheAutoMode(findOne);
     Object result = request.getFromQueryCache();
     if (result != null) {
       return (List<T>) result;
     }
+    if ((t == null || !t.isSkipCache()) && request.getFromBeanCache()) {
+      return request.getBeanCacheHits();
+    }
     if (request.isUseDocStore()) {
       return docStore().findList(request);
     }
@@ -1572,7 +1486,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   public List<SqlRow> findList(SqlQuery query, Transaction t) {
 
     RelationalQueryRequest request = new RelationalQueryRequest(this, relationalQueryEngine, query, t);
-
     try {
       request.initTransIfRequired();
       return request.findList();
@@ -1960,6 +1873,14 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     return beanDescriptorManager.getBeanDescriptorList();
   }
 
+  /**
+   * Return the transaction manager.
+   */
+  @Override
+  public SpiTransactionManager getTransactionManager() {
+    return transactionManager;
+  }
+
   public void register(BeanPersistController c) {
     List<BeanDescriptor<?>> list = beanDescriptorManager.getBeanDescriptorList();
     for (BeanDescriptor<?> aList : list) {
@@ -2067,6 +1988,30 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   @Override
   public void remoteTransactionEvent(RemoteTransactionEvent event) {
     transactionManager.remoteTransactionEvent(event);
+    processRemoteCacheEvent(event);
+  }
+
+  /**
+   * Process a cache event coming from another server in the cluster.
+   */
+  private void processRemoteCacheEvent(RemoteTransactionEvent event) {
+    RemoteCacheEvent cacheEvent = event.getRemoteCacheEvent();
+    if (cacheEvent != null) {
+      if (cacheEvent.isClearAll()) {
+        serverCacheManager.clearAllLocal();
+      } else {
+        List<String> caches = cacheEvent.getClearCaches();
+        if (caches != null) {
+          for (String cache : caches) {
+            try {
+              serverCacheManager.clearLocal(Class.forName(cache));
+            } catch (Exception e) {
+              logger.error("Error clearing local cache for type " + cache, e);
+            }
+          }
+        }
+      }
+    }
   }
 
   private <P> P executeInTrans(Function<SpiTransaction, P> fun, Transaction t) {
@@ -2090,7 +2035,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     if (t != null) {
       return new ObtainedTransaction((SpiTransaction) t);
     }
-    SpiTransaction trans = transactionScopeManager.get();
+    SpiTransaction trans = transactionManager.get();
     if (trans != null) {
       return new ObtainedTransaction(trans);
     }
@@ -2100,9 +2045,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public SpiTransaction beginServerTransaction() {
-    SpiTransaction t = transactionManager.createTransaction(0, false, -1);
-    transactionScopeManager.set(t);
-    return t;
+    return transactionManager.beginServerTransaction();
   }
 
   @Override
@@ -2119,35 +2062,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public CallStack createCallStack() {
-
-    StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
-
-    // ignore the first 6 as they are always avaje stack elements
-    int startIndex = IGNORE_LEADING_ELEMENTS;
-
-    // find the first non-avaje stackElement
-    for (; startIndex < stackTrace.length; startIndex++) {
-      if (!stackTrace[startIndex].getClassName().startsWith(IO_EBEAN)) {
-        break;
-      }
-    }
-
-    int stackLength = stackTrace.length - startIndex;
-    if (stackLength > maxCallStack) {
-      // maximum of maxCallStack stackTrace elements
-      stackLength = maxCallStack;
-    }
-
-    // create the 'interesting' part of the stackTrace
-    StackTraceElement[] finalTrace = new StackTraceElement[stackLength];
-    System.arraycopy(stackTrace, startIndex, finalTrace, 0, stackLength);
-
-    if (stackLength < 1) {
-      // this should not really happen
-      throw new RuntimeException("StackTraceElement size 0?  stack: " + Arrays.toString(stackTrace));
-    }
-
-    return callStackFactory.createCallStack(finalTrace);
+    return callStackFactory.createCallStack();
   }
 
   @Override
@@ -2189,4 +2104,8 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
       }
     }
   }
+
+  public List<MetaTimedMetric> collectTransactionStatistics(boolean reset) {
+    return transactionManager.collectTransactionStatistics(reset);
+  }
 }

src/main/java/io/ebeaninternal/server/core/InternalConfiguration.java

@@ -91,6 +91,8 @@ public class InternalConfiguration {
 
   private final BootupClasses bootupClasses;
 
+  private final DatabasePlatform databasePlatform;
+
   private final DeployInherit deployInherit;
 
   private final TypeManager typeManager;
@@ -138,8 +140,8 @@ public class InternalConfiguration {
     this.serverConfig = serverConfig;
     this.bootupClasses = bootupClasses;
 
-    DatabasePlatform databasePlatform = serverConfig.getDatabasePlatform();
-    this.expressionFactory = initExpressionFactory(serverConfig, databasePlatform);
+    this.databasePlatform = serverConfig.getDatabasePlatform();
+    this.expressionFactory = initExpressionFactory(serverConfig);
     this.typeManager = new DefaultTypeManager(serverConfig, bootupClasses);
 
     this.multiValueBind = createMultiValueBind(databasePlatform.getPlatform());
@@ -151,6 +153,7 @@ public class InternalConfiguration {
     this.beanDescriptorManager = new BeanDescriptorManager(this);
     Map<String, String> asOfTableMapping = beanDescriptorManager.deploy();
     Map<String, String> draftTableMap = beanDescriptorManager.getDraftTableMap();
+    beanDescriptorManager.scheduleBackgroundTrim();
 
     this.dataTimeZone = initDataTimeZone();
     this.binder = getBinder(typeManager, databasePlatform, dataTimeZone);
@@ -160,7 +163,7 @@ public class InternalConfiguration {
   /**
    * Create and return the ExpressionFactory based on configuration and database platform.
    */
-  private ExpressionFactory initExpressionFactory(ServerConfig serverConfig, DatabasePlatform databasePlatform) {
+  private ExpressionFactory initExpressionFactory(ServerConfig serverConfig) {
 
     boolean nativeIlike = serverConfig.isExpressionNativeIlike() && databasePlatform.isSupportsNativeIlike();
     return new DefaultExpressionFactory(serverConfig.isExpressionEqualsWithNullAsNoop(), nativeIlike);
@@ -259,16 +262,17 @@ public class InternalConfiguration {
    * Return the JSON expression handler for the given database platform.
    */
   private DbExpressionHandler getDbExpressionHandler(DatabasePlatform databasePlatform) {
-    final Platform platform = databasePlatform.getPlatform();
+    Platform platform = databasePlatform.getPlatform();
+    String concatOperator = databasePlatform.getConcatOperator();
     switch (platform) {
       case POSTGRES:
-        return new PostgresJsonExpression();
+        return new PostgresDbExpression(concatOperator);
       case ORACLE:
-        return new OracleDbExpression();
+        return new OracleDbExpression(concatOperator);
       case SQLSERVER:
-        return new SqlServerJsonExpression();
+        return new SqlServerDbExpression(concatOperator);
       default:
-        return new NotSupportedDbExpression();
+        return new BasicDbExpression(concatOperator);
     }
   }
 
@@ -367,10 +371,11 @@ public class InternalConfiguration {
    */
   public TransactionManager createTransactionManager(DocStoreUpdateProcessor indexUpdateProcessor) {
 
+    TransactionScopeManager scopeManager = createTransactionScopeManager();
     boolean localL2 = cacheManager.isLocalL2Caching();
 
     TransactionManagerOptions options =
-      new TransactionManagerOptions(localL2, serverConfig, clusterManager, backgroundExecutor,
+      new TransactionManagerOptions(localL2, serverConfig, scopeManager, clusterManager, backgroundExecutor,
                                     indexUpdateProcessor, beanDescriptorManager, dataSource(), profileHandler());
 
     if (serverConfig.isExplicitTransactionBeginMode()) {
@@ -406,11 +411,11 @@ public class InternalConfiguration {
       case DB:
         return new MultiTenantDbSupplier(serverConfig.getCurrentTenantProvider(), serverConfig.getTenantDataSourceProvider());
       case SCHEMA:
-        return new MultiTenantDbSchemaSupplier(serverConfig.getCurrentTenantProvider(), serverConfig.getDataSource(), serverConfig.getTenantSchemaProvider());
+        return new MultiTenantDbSchemaSupplier(serverConfig.getCurrentTenantProvider(), serverConfig.getDataSource(), serverConfig.getReadOnlyDataSource(), serverConfig.getTenantSchemaProvider());
       case CATALOG:
-        return new MultiTenantDbCatalogSupplier(serverConfig.getCurrentTenantProvider(), serverConfig.getDataSource(), serverConfig.getTenantCatalogProvider());
+        return new MultiTenantDbCatalogSupplier(serverConfig.getCurrentTenantProvider(), serverConfig.getDataSource(), serverConfig.getReadOnlyDataSource(), serverConfig.getTenantCatalogProvider());
       default:
-        return new SimpleDataSourceProvider(serverConfig.getDataSource());
+        return new SimpleDataSourceProvider(serverConfig.getDataSource(), serverConfig.getReadOnlyDataSource());
     }
   }
 
@@ -429,18 +434,17 @@ public class InternalConfiguration {
   /**
    * Create the TransactionScopeManager taking into account JTA or external transaction manager.
    */
-  public TransactionScopeManager createTransactionScopeManager(TransactionManager transactionManager) {
+  public TransactionScopeManager createTransactionScopeManager() {
 
     ExternalTransactionManager externalTransactionManager = serverConfig.getExternalTransactionManager();
     if (externalTransactionManager == null && serverConfig.isUseJtaTransactionManager()) {
       externalTransactionManager = new JtaTransactionManager();
     }
     if (externalTransactionManager != null) {
-      externalTransactionManager.setTransactionManager(transactionManager);
       logger.info("Using Transaction Manager [" + externalTransactionManager.getClass() + "]");
-      return new ExternalTransactionScopeManager(transactionManager, externalTransactionManager);
+      return new ExternalTransactionScopeManager(serverConfig.getName(), externalTransactionManager);
     } else {
-      return new DefaultTransactionScopeManager(transactionManager);
+      return new DefaultTransactionScopeManager(serverConfig.getName());
     }
   }
 

src/main/java/io/ebeaninternal/server/core/MultiTenantDbCatalogSupplier.java

@@ -17,19 +17,21 @@ import java.util.logging.Logger;
  */
 public class MultiTenantDbCatalogSupplier implements DataSourceSupplier {
 
-  private final CurrentTenantProvider tenantProvider;
-
   private final DataSource dataSource;
-
-  private final TenantCatalogProvider catalogProvider;
+  private final DataSource readOnlyDataSource;
 
   private final CatalogDataSource catalogDataSource;
+  private final CatalogDataSource readOnly;
 
-  MultiTenantDbCatalogSupplier(CurrentTenantProvider tenantProvider, DataSource dataSource, TenantCatalogProvider catalogProvider) {
-    this.tenantProvider = tenantProvider;
+  MultiTenantDbCatalogSupplier(CurrentTenantProvider tenantProvider, DataSource dataSource, DataSource readOnlyDataSource, TenantCatalogProvider catalogProvider) {
     this.dataSource = dataSource;
-    this.catalogProvider = catalogProvider;
-    this.catalogDataSource = new CatalogDataSource();
+    this.readOnlyDataSource = readOnlyDataSource;
+    this.catalogDataSource = new CatalogDataSource(dataSource, tenantProvider, catalogProvider);
+    if (readOnlyDataSource == null) {
+      this.readOnly = null;
+    } else {
+      this.readOnly = new CatalogDataSource(readOnlyDataSource, tenantProvider, catalogProvider);
+    }
   }
 
   @Override
@@ -37,28 +39,48 @@ public class MultiTenantDbCatalogSupplier implements DataSourceSupplier {
     return catalogDataSource;
   }
 
+  @Override
+  public DataSource getReadOnlyDataSource() {
+    return readOnly;
+  }
+
   @Override
   public Connection getConnection(Object tenantId) throws SQLException {
     return catalogDataSource.getConnectionForTenant(tenantId);
   }
 
+  @Override
+  public Connection getReadOnlyConnection(Object tenantId) throws SQLException {
+    return readOnly.getConnectionForTenant(tenantId);
+  }
+
   @Override
   public void shutdown(boolean deregisterDriver) {
+    if (readOnlyDataSource instanceof DataSourcePool) {
+      ((DataSourcePool) readOnlyDataSource).shutdown(false);
+    }
     if (dataSource instanceof DataSourcePool) {
       ((DataSourcePool) dataSource).shutdown(deregisterDriver);
     }
   }
 
-  /**
-   * Returns the DB catalog for the current user Tenant Id.
-   */
-  private String tenantCatalog() {
-    return catalogProvider.catalog(tenantProvider.currentId());
-  }
-
   private class CatalogDataSource implements DataSource {
 
-    CatalogDataSource() {
+    final DataSource dataSource;
+    final CurrentTenantProvider tenantProvider;
+    final TenantCatalogProvider catalogProvider;
+
+    CatalogDataSource(DataSource dataSource, CurrentTenantProvider tenantProvider, TenantCatalogProvider catalogProvider) {
+      this.dataSource = dataSource;
+      this.tenantProvider = tenantProvider;
+      this.catalogProvider = catalogProvider;
+    }
+
+    /**
+     * Returns the DB catalog for the current user Tenant Id.
+     */
+    private String tenantCatalog() {
+      return catalogProvider.catalog(tenantProvider.currentId());
     }
 
     /**

src/main/java/io/ebeaninternal/server/core/MultiTenantDbSchemaSupplier.java

@@ -17,19 +17,21 @@ import java.util.logging.Logger;
  */
 class MultiTenantDbSchemaSupplier implements DataSourceSupplier {
 
-  private final CurrentTenantProvider tenantProvider;
-
   private final DataSource dataSource;
-
-  private final TenantSchemaProvider schemaProvider;
+  private final DataSource readOnlyDataSource;
 
   private final SchemaDataSource schemaDataSource;
+  private final SchemaDataSource readOnly;
 
-  MultiTenantDbSchemaSupplier(CurrentTenantProvider tenantProvider, DataSource dataSource, TenantSchemaProvider schemaProvider) {
-    this.tenantProvider = tenantProvider;
+  MultiTenantDbSchemaSupplier(CurrentTenantProvider tenantProvider, DataSource dataSource, DataSource readOnlyDataSource, TenantSchemaProvider schemaProvider) {
     this.dataSource = dataSource;
-    this.schemaProvider = schemaProvider;
-    this.schemaDataSource = new SchemaDataSource();
+    this.readOnlyDataSource = readOnlyDataSource;
+    this.schemaDataSource = new SchemaDataSource(dataSource, schemaProvider, tenantProvider);
+    if (readOnlyDataSource == null) {
+      this.readOnly = null;
+    } else {
+      this.readOnly = new SchemaDataSource(readOnlyDataSource, schemaProvider, tenantProvider);
+    }
   }
 
   @Override
@@ -37,28 +39,44 @@ class MultiTenantDbSchemaSupplier implements DataSourceSupplier {
     return schemaDataSource;
   }
 
+  @Override
+  public DataSource getReadOnlyDataSource() {
+    return readOnly;
+  }
+
   @Override
   public Connection getConnection(Object tenantId) throws SQLException {
     return schemaDataSource.getConnectionForTenant(tenantId);
   }
 
+  @Override
+  public Connection getReadOnlyConnection(Object tenantId) throws SQLException {
+    return readOnly.getConnectionForTenant(tenantId);
+  }
+
   @Override
   public void shutdown(boolean deregisterDriver) {
+    if (readOnlyDataSource instanceof DataSourcePool) {
+      ((DataSourcePool) readOnlyDataSource).shutdown(false);
+    }
     if (dataSource instanceof DataSourcePool) {
       ((DataSourcePool) dataSource).shutdown(deregisterDriver);
     }
   }
 
   /**
-   * Returns the DB schema for the current user Tenant Id.
+   * Tenant schema aware DataSource.
    */
-  private String tenantSchema() {
-    return schemaProvider.schema(tenantProvider.currentId());
-  }
+  private static class SchemaDataSource implements DataSource {
 
-  private class SchemaDataSource implements DataSource {
+    private final DataSource dataSource;
+    private final TenantSchemaProvider schemaProvider;
+    private final CurrentTenantProvider tenantProvider;
 
-    SchemaDataSource() {
+    SchemaDataSource(DataSource dataSource, TenantSchemaProvider schemaProvider, CurrentTenantProvider tenantProvider) {
+      this.dataSource = dataSource;
+      this.schemaProvider = schemaProvider;
+      this.tenantProvider = tenantProvider;
     }
 
     /**
@@ -70,6 +88,13 @@ class MultiTenantDbSchemaSupplier implements DataSourceSupplier {
       return connection;
     }
 
+    /**
+     * Returns the DB schema for the current user Tenant Id.
+     */
+    private String tenantSchema() {
+      return schemaProvider.schema(tenantProvider.currentId());
+    }
+
     /**
      * Return the connection with the appropriate DB schema set.
      */

src/main/java/io/ebeaninternal/server/core/MultiTenantDbSupplier.java

@@ -22,6 +22,12 @@ class MultiTenantDbSupplier implements DataSourceSupplier {
     this.dataSourceProvider = dataSourceProvider;
   }
 
+  @Override
+  public DataSource getReadOnlyDataSource() {
+    // read only datasource not supported with DB per tenant at this stage
+    return null;
+  }
+
   @Override
   public DataSource getDataSource() {
     return dataSourceProvider.dataSource(tenantProvider.currentId());
@@ -32,6 +38,11 @@ class MultiTenantDbSupplier implements DataSourceSupplier {
     return dataSourceProvider.dataSource(tenantId).getConnection();
   }
 
+  @Override
+  public Connection getReadOnlyConnection(Object tenantId) throws SQLException {
+    throw new SQLException("Not currently supported");
+  }
+
   @Override
   public void shutdown(boolean deregisterDriver) {
     dataSourceProvider.shutdown(deregisterDriver);

src/main/java/io/ebeaninternal/server/core/NoopCallStackFactory.java

@@ -0,0 +1,16 @@
+package io.ebeaninternal.server.core;
+
+import io.ebean.bean.CallStack;
+
+/**
+ * A CallStackFactory we can use when we don't use AutoTune.
+ */
+class NoopCallStackFactory implements CallStackFactory {
+
+  private final CallStack COMMON = new CallStack(Thread.currentThread().getStackTrace(), 0, 0);
+
+  @Override
+  public CallStack createCallStack() {
+    return COMMON;
+  }
+}

src/main/java/io/ebeaninternal/server/core/OracleDbExpression.java

@@ -6,7 +6,11 @@ import io.ebeaninternal.server.expression.Op;
 /**
  * Oracle JSON expression handler, ARRAY expressions not supported.
  */
-public class OracleDbExpression implements DbExpressionHandler {
+public class OracleDbExpression extends BaseDbExpression {
+
+  OracleDbExpression(String concatOperator) {
+    super(concatOperator);
+  }
 
   @Override
   public void json(SpiExpressionRequest request, String propName, String path, Op operator, Object value) {

src/main/java/io/ebeaninternal/server/core/OrmQueryRequest.java

@@ -1,20 +1,25 @@
 package io.ebeaninternal.server.core;
 
 import io.ebean.CacheMode;
+import io.ebean.OrderBy;
 import io.ebean.PersistenceContextScope;
 import io.ebean.QueryIterator;
 import io.ebean.Version;
 import io.ebean.bean.BeanCollection;
 import io.ebean.bean.EntityBean;
 import io.ebean.bean.PersistenceContext;
+import io.ebean.common.BeanList;
 import io.ebean.common.CopyOnFirstWriteList;
 import io.ebean.event.BeanFindController;
 import io.ebean.event.BeanQueryAdapter;
 import io.ebean.event.BeanQueryRequest;
 import io.ebean.text.json.JsonReadOptions;
+import io.ebeaninternal.api.BeanCacheResult;
 import io.ebeaninternal.api.CQueryPlanKey;
 import io.ebeaninternal.api.HashQuery;
 import io.ebeaninternal.api.LoadContext;
+import io.ebeaninternal.api.NaturalKeyQueryData;
+import io.ebeaninternal.api.NaturalKeySet;
 import io.ebeaninternal.api.SpiEbeanServer;
 import io.ebeaninternal.api.SpiQuery;
 import io.ebeaninternal.api.SpiQuery.Type;
@@ -73,6 +78,8 @@ public final class OrmQueryRequest<T> extends BeanRequest implements BeanQueryRe
 
   private SpiQuerySecondary secondaryQueries;
 
+  private List<T> cacheBeans;
+
   /**
    * Create the InternalQueryRequest.
    */
@@ -89,6 +96,20 @@ public final class OrmQueryRequest<T> extends BeanRequest implements BeanQueryRe
     return queryEngine.translate(this, bindLog, sql, e);
   }
 
+  @Override
+  public void profileLocationById() {
+    if (query.getProfileLocation() == null) {
+      query.setProfileLocation(beanDescriptor.profileLocationById());
+    }
+  }
+
+  @Override
+  public void profileLocationAll() {
+    if (query.getProfileLocation() == null && query.isFindAll()) {
+      query.setProfileLocation(beanDescriptor.profileLocationAll());
+    }
+  }
+
   @Override
   public boolean isMultiValueIdSupported() {
     return beanDescriptor.isMultiValueIdSupported();
@@ -234,13 +255,15 @@ public final class OrmQueryRequest<T> extends BeanRequest implements BeanQueryRe
   public void initTransIfRequired() {
     // first check if the query requires its own transaction
     if (transaction == null) {
-      // maybe a current one
-      transaction = ebeanServer.currentServerTransaction();
-      if (transaction == null) {
+      if (query.getType().isUpdate()) {
+        // bulk update or delete query
+        transaction = ebeanServer.beginServerTransaction();
+      } else {
         // create an implicit transaction to execute this query
+        // potentially using read-only DataSource with autoCommit
         transaction = ebeanServer.createQueryTransaction(query.getTenantId());
-        createdTransaction = true;
       }
+      createdTransaction = true;
     }
     persistenceContext = getPersistenceContext(query, transaction);
     loadContext = new DLoadContext(this, secondaryQueries);
@@ -495,8 +518,79 @@ public final class OrmQueryRequest<T> extends BeanRequest implements BeanQueryRe
     beanDescriptor.putQueryPlan(queryPlanKey, queryPlan);
   }
 
-  public boolean isUseBeanCache() {
-    return query.isUseBeanCache();
+  @Override
+  public void resetBeanCacheAutoMode(boolean findOne) {
+    query.resetBeanCacheAutoMode(findOne);
+  }
+
+  public boolean isQueryCachePut() {
+    return cacheKey != null && query.getUseQueryCache().isPut();
+  }
+
+  public boolean isBeanCachePut() {
+    return !transaction.isSkipCache() && query.isBeanCachePut();
+  }
+
+  /**
+   * Merge in prior L2 bean cache hits with the query result.
+   */
+  public void mergeCacheHits(BeanCollection<T> result) {
+
+    if (cacheBeans != null && !cacheBeans.isEmpty()) {
+      for (T hit : cacheBeans) {
+        result.internalAdd(hit);
+      }
+      // resort in memory here after merging the cache hits with the DB hits
+      if (result instanceof BeanList) {
+        OrderBy<T> orderBy = query.getOrderBy();
+        if (orderBy != null) {
+          beanDescriptor.sort(((BeanList<T>)result).getActualList(), orderBy.toStringFormat());
+        }
+      }
+    }
+  }
+
+  @Override
+  public List<T> getBeanCacheHits() {
+    OrderBy<T> orderBy = query.getOrderBy();
+    if (orderBy != null) {
+      beanDescriptor.sort(cacheBeans, orderBy.toStringFormat());
+    }
+    return cacheBeans;
+  }
+
+  @Override
+  public boolean getFromBeanCache() {
+
+    if (!query.isBeanCacheGet()) {
+      return false;
+    }
+
+    // check if the query can use the bean cache
+    // 1. Find by Ids
+    //    - hit beanCache with Ids
+    //    - keep cache beans, ensure query modified to fetch misses
+    //    - query and Load misses into bean cache
+    //    - merge the 2 results and return
+    //
+
+    if (!beanDescriptor.isNaturalKeyCaching()) {
+      return false;
+    }
+
+    NaturalKeyQueryData<T> data = query.naturalKey();
+    if (data != null) {
+      NaturalKeySet naturalKeySet = data.buildKeys();
+      if (naturalKeySet != null) {
+        // use the natural keys to lookup Ids to then hit the bean cache
+        BeanCacheResult<T> cacheResult = beanDescriptor.naturalKeyLookup(persistenceContext, naturalKeySet.keys());
+        // adjust the query (IN clause) based on the cache hits
+        this.cacheBeans = data.removeHits(cacheResult);
+        return data.allHits();
+      }
+    }
+
+    return false;
   }
 
   /**
@@ -506,7 +600,7 @@ public final class OrmQueryRequest<T> extends BeanRequest implements BeanQueryRe
   @SuppressWarnings("unchecked")
   public Object getFromQueryCache() {
 
-    if (query.getUseQueryCache() == CacheMode.OFF) {
+    if (query.getUseQueryCache() == CacheMode.OFF || (transaction != null && transaction.isSkipCache())) {
       return null;
     } else {
       cacheKey = query.queryHash();

src/main/java/io/ebeaninternal/server/core/PostgresDbExpression.java

@@ -6,7 +6,11 @@ import io.ebeaninternal.server.expression.Op;
 /**
  * Postgres JSON and ARRAY expression handler
  */
-public class PostgresJsonExpression implements DbExpressionHandler {
+public class PostgresDbExpression extends BaseDbExpression {
+
+  PostgresDbExpression(String concatOperator) {
+    super(concatOperator);
+  }
 
   @Override
   public void json(SpiExpressionRequest request, String propName, String path, Op operator, Object value) {

src/main/java/io/ebeaninternal/server/core/RelationalQueryRequest.java

@@ -61,7 +61,7 @@ public final class RelationalQueryRequest {
   /**
    * Create the BeanFindRequest.
    */
-  public RelationalQueryRequest(SpiEbeanServer server, RelationalQueryEngine engine, SqlQuery q, Transaction t) {
+  RelationalQueryRequest(SpiEbeanServer server, RelationalQueryEngine engine, SqlQuery q, Transaction t) {
     this.ebeanServer = server;
     this.queryEngine = engine;
     this.query = (SpiSqlQuery) q;

src/main/java/io/ebeaninternal/server/core/SimpleDataSourceProvider.java

@@ -14,8 +14,11 @@ class SimpleDataSourceProvider implements DataSourceSupplier {
 
   private final DataSource dataSource;
 
-  SimpleDataSourceProvider(DataSource dataSource) {
+  private final DataSource readOnlyDataSource;
+
+  SimpleDataSourceProvider(DataSource dataSource, DataSource readOnlyDataSource) {
     this.dataSource = dataSource;
+    this.readOnlyDataSource = readOnlyDataSource;
   }
 
   @Override
@@ -23,13 +26,26 @@ class SimpleDataSourceProvider implements DataSourceSupplier {
     return dataSource;
   }
 
+  @Override
+  public DataSource getReadOnlyDataSource() {
+    return readOnlyDataSource;
+  }
+
   @Override
   public Connection getConnection(Object tenantId) throws SQLException {
     return dataSource.getConnection();
   }
 
+  @Override
+  public Connection getReadOnlyConnection(Object tenantId) throws SQLException {
+    return readOnlyDataSource.getConnection();
+  }
+
   @Override
   public void shutdown(boolean deregisterDriver) {
+    if (readOnlyDataSource instanceof DataSourcePool){
+      ((DataSourcePool) readOnlyDataSource).shutdown(false);
+    }
     if (dataSource instanceof DataSourcePool){
       ((DataSourcePool) dataSource).shutdown(deregisterDriver);
     }