gistfile1.txt

try {
  		new Thread() {
				public void run() {
					try {
						TransactionManager transactionManager = TestingJtaPlatformImpl.INSTANCE.getTransactionManager();
						transactionManager.setTransactionTimeout( 5 );
	
						transactionManager.begin();
						EntityManager em = entityManagerFactory().createEntityManager();
	
						DataPoint dp = new DataPoint();
						dp.name = "foo";
						em.persist( dp );
						long id = dp.id;
						TestingJtaPlatformImpl.tryCommit();
						em.close();
						
						transactionManager.begin();
						em = entityManagerFactory().createEntityManager();
						dp = em.find( DataPoint.class, id );
						System.out.println("FOUND dp: " + dp.name);
						em.remove( dp );
						TestingJtaPlatformImpl.tryCommit();
						em.close();
					} catch (Exception e) {
						e.printStackTrace();
					}
				}
			}.start();
			
			Thread.sleep( 30000 );
		} catch (Exception e) {
			e.printStackTrace();
		}