jpa_several_tx.java

@Test
public void foo() throws Exception {
	getTransactionManager().begin();
	EntityManager em = getFactory().createEntityManager();

	// that's committed
	Item item = new Item( "To thatch a roof - Ultimate Edition", 10 );
	em.persist( item );
	getTransactionManager().commit();

	// but that's never visible (GridDialect is not invoked)
	getTransactionManager().begin();
	OrderLine orderLine = new OrderLine( item, 2 );
	em.persist( orderLine );
	item.setStock( item.getStock() - 2 );
	getTransactionManager().commit();

	em.clear();
	getTransactionManager().begin();
	item = em.find( Item.class, item.getId() );
	assertThat( item.getStock() ).isEqualTo( 8 );
	getTransactionManager().commit();

	em.close();
}