Tom Coupland [http://community.jboss.org/people/tcoup] created the discussion "Re: How do you programmatically create datasources in JBoss5" To view the discussion, visit: http://community.jboss.org/message/624249#624249 -------------------------------------------------------------- Following 'fans xnet's excellant advise i did create a factory. I even (eventually) worked out what to put in it! In order to build an EMF you need to do something like: {code} public EntityManagerFactory buildEntityManagerFactory(DataSource datasource) {         Ejb3Configuration ejbconf = new Ejb3Configuration();         ejbconf.setDataSource(datasource);         ejbconf.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5InnoDBDialect");         ejbconf.setProperty("hibernate.show_sql", "false");         //Make transactionally aware         ejbconf.setProperty("hibernate.transaction.manager_lookup_class", "org.hibernate.transaction.JBossTransactionManagerLookup");         ejbconf.setProperty("jta.UserTransaction", "java:comp/UserTransaction");         ejbconf.setProperty("hibernate.current_session_context_class", "jta");         ejbconf.setProperty(HibernatePersistence.TRANSACTION_TYPE, PersistenceUnitTransactionType.JTA.name());         //Add caching         ejbconf.setProperty("hibernate.cache.provider_class", "HibernateEhCacheProviderClass");         ejbconf.setProperty("hibernate.cache.use_second_level_cache", "true");         ejbconf.setProperty("net.sf.ehcache.configurationResourceName", "META-INF/ehcache.xml");         //Add you entity beans here         ejbconf.addAnnotatedClass(SomeEntityBean.class);         return  ejbconf.buildEntityManagerFactory(); {code} Knocking up a datasource with DBCP looks like: {code}     public DataSource buildDatasource(String connectionUrl) {         // Create base connection factory that produces raw db connections.         ConnectionFactory connectionFactory = new DriverManagerConnectionFactory(connectionUrl, libraryUser,                 libraryPassword);         // Object pool for pooling raw connections         GenericObjectPool connPool = new GenericObjectPool();         connPool.setMaxActive(maxShardConns);         connPool.setMinIdle(minShardConns);         connPool.setMaxIdle(maxIdleConns);         connPool.setMinEvictableIdleTimeMillis(shardConnTimeOutMins * 60 * 1000);         connPool.setTestOnBorrow(true);         connPool = new InstrumentedObjectPool(extractServerName(connectionUrl), connPool);         String connectionValidationSql = "SELECT 1;";         KeyedObjectPoolFactory preparedStatementPool = null;         Boolean defaultConnectionsToReadOnly = false;         Boolean defaultConnectionsToAutoCommit = false;         TransactionManager transactionManager;         try {             transactionManager = (TransactionManager) InitialContext.doLookup("java:/TransactionManager");         } catch (NamingException e) {             throw new RuntimeException("Unable to lookup transaction manager", e);         }         LocalXAConnectionFactory transactionFactory = new LocalXAConnectionFactory(transactionManager,                 connectionFactory);         // Create factory to manage the connectionPool         PoolableManagedConnectionFactory poolableConnectionFactory = new PoolableManagedConnectionFactory(                 transactionFactory, connPool, preparedStatementPool, connectionValidationSql,                 defaultConnectionsToReadOnly, defaultConnectionsToAutoCommit);         ManagedDataSource dataSource = new ManagedDataSource(connPool, transactionFactory.getTransactionRegistry());         return dataSource; {code} Using these in combination will give you a transactionally aware EMF with connection pooling. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/624249#624249] Start a new discussion in Datasource Configuration at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]