ADD: Db2 container support

ebean-api/src/main/java/io/ebean/config/dbplatform/db2/DB2Platform.java

@@ -20,8 +20,10 @@ public class DB2Platform extends DatabasePlatform {
   public DB2Platform() {
     super();
     this.platform = Platform.DB2;
-    this.maxTableNameLength = 18;
-    this.maxConstraintNameLength = 18;
+    // Note: DB2 (at least LUW supports length up to 128)
+    // TOOD: Check if we need to introduce a new platform (DB2_LUW_11 ?)
+    this.maxTableNameLength = 128;
+    this.maxConstraintNameLength = 128;
     this.truncateTable = "truncate table %s reuse storage ignore delete triggers immediate";
     this.sqlLimiter = new Db2SqlLimiter();
 

ebean-test/src/main/java/io/ebean/test/config/platform/Db2Setup.java

@@ -0,0 +1,41 @@
+package io.ebean.test.config.platform;
+
+import java.util.Properties;
+
+class Db2Setup implements PlatformSetup {
+
+  @Override
+  public Properties setup(Config config) {
+
+    config.ddlMode("dropCreate");
+    config.setDefaultPort(50000);
+    config.setUsernameDefault();
+    config.setPasswordDefault();
+    config.setUrl("jdbc:db2://localhost:${port}/${databaseName}");
+    config.setDriver("com.ibm.db2.jcc.DB2Driver");
+    config.datasourceDefaults();
+
+    return dockerProperties(config);
+  }
+
+  private Properties dockerProperties(Config dbConfig) {
+
+    if (!dbConfig.isUseDocker()) {
+      return new Properties();
+    }
+
+    dbConfig.setDockerVersion("11.5.6.0a");
+    return dbConfig.getDockerProperties();
+  }
+
+  @Override
+  public void setupExtraDbDataSource(Config config) {
+    // not supported yet
+  }
+
+  @Override
+  public boolean isLocal() {
+    return false;
+  }
+
+}

ebean-test/src/main/java/io/ebean/test/config/platform/PlatformAutoConfig.java

@@ -34,6 +34,7 @@ public class PlatformAutoConfig {
     KNOWN_PLATFORMS.put("clickhouse", new ClickHouseSetup());
     KNOWN_PLATFORMS.put("cockroach", new CockroachSetup());
     KNOWN_PLATFORMS.put("hana", new HanaSetup());
+    KNOWN_PLATFORMS.put("db2", new Db2Setup());
   }
 
   private final DatabaseConfig config;

ebean-test/src/test/java/main/StartDb2.java

@@ -0,0 +1,22 @@
+package main;
+
+import io.ebean.docker.commands.Db2Config;
+import io.ebean.docker.commands.Db2Container;
+
+public class StartDb2 {
+
+  public static void main(String[] args) {
+
+    Db2Config config = new Db2Config("11.5.6.0a");
+    config.setDbName("unit");
+    config.setUser("unit");
+    config.setPassword("unit");
+
+    // to change collation, charset and other parameters like pagesize:
+    config.setCreateOptions("USING CODESET UTF-8 TERRITORY DE COLLATE USING IDENTITY PAGESIZE 32768");
+    config.setConfigOptions("USING STRING_UNITS CODEUNITS32");
+
+    Db2Container container = new Db2Container(config);
+    container.startWithDropCreate();
+  }
+}

ebean-test/src/test/resources/ebean.properties

@@ -181,9 +181,9 @@ datasource.nuodb.password=test
 datasource.nuodb.url=jdbc:com.nuodb://localhost/testdb
 #datasource.nuodb.driver=com.nuodb.jdbc.Driver
 
-datasource.db2.username=db2admin
-datasource.db2.password=veryverysecret#1234
-datasource.db2.url=jdbc:db2://127.0.0.1:50000/SAMPLE
+datasource.db2.username=unit
+datasource.db2.password=test
+datasource.db2.url=jdbc:db2://127.0.0.1:50000/unit
 #datasource.db2.driver=com.ibm.db2.jcc.DB2Driver
 
 datasource.hana.username=EBEAN_TEST