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Java example source code file (ManagedLocalTransactionsTest.java)
The ManagedLocalTransactionsTest.java Java example source code/** * Copyright (C) 2010 Google, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.google.inject.persist.jpa; import com.google.inject.Guice; import com.google.inject.Inject; import com.google.inject.Injector; import com.google.inject.persist.PersistService; import com.google.inject.persist.Transactional; import com.google.inject.persist.UnitOfWork; import junit.framework.TestCase; import java.io.IOException; import java.util.Date; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.NoResultException; /** * @author Dhanji R. Prasanna (dhanji@gmail.com) */ public class ManagedLocalTransactionsTest extends TestCase { private Injector injector; private static final String UNIQUE_TEXT = "some unique text" + new Date(); private static final String UNIQUE_TEXT_MERGE = "meRG_Esome unique text" + new Date(); private static final String TRANSIENT_UNIQUE_TEXT = "some other unique text" + new Date(); @Override public void setUp() { injector = Guice.createInjector(new JpaPersistModule("testUnit")); //startup persistence injector.getInstance(PersistService.class).start(); } @Override public final void tearDown() { injector.getInstance(UnitOfWork.class).end(); injector.getInstance(EntityManagerFactory.class).close(); } public void testSimpleTransaction() { injector.getInstance(TransactionalObject.class).runOperationInTxn(); EntityManager em = injector.getInstance(EntityManager.class); assertFalse("txn was not closed by transactional service", em.getTransaction().isActive()); //test that the data has been stored Object result = em.createQuery("from JpaTestEntity where text = :text") .setParameter("text", UNIQUE_TEXT).getSingleResult(); injector.getInstance(UnitOfWork.class).end(); assertTrue("odd result returned fatal", result instanceof JpaTestEntity); assertEquals("queried entity did not match--did automatic txn fail?", UNIQUE_TEXT, ((JpaTestEntity) result).getText()); } public void testSimpleTransactionWithMerge() { JpaTestEntity entity = injector.getInstance(TransactionalObject.class) .runOperationInTxnWithMerge(); EntityManager em = injector.getInstance(EntityManager.class); assertFalse("txn was not closed by transactional service", em.getTransaction().isActive()); //test that the data has been stored assertTrue("Em was closed after txn!", em.isOpen()); Object result = em.createQuery("from JpaTestEntity where text = :text") .setParameter("text", UNIQUE_TEXT_MERGE).getSingleResult(); injector.getInstance(UnitOfWork.class).end(); assertTrue(result instanceof JpaTestEntity); assertEquals("queried entity did not match--did automatic txn fail?", UNIQUE_TEXT_MERGE, ((JpaTestEntity) result).getText()); } public void testSimpleTransactionRollbackOnChecked() { try { injector.getInstance(TransactionalObject.class).runOperationInTxnThrowingChecked(); } catch (IOException e) { //ignore injector.getInstance(UnitOfWork.class).end(); } EntityManager em = injector.getInstance(EntityManager.class); assertFalse("Previous EM was not closed by transactional service (rollback didnt happen?)", em.getTransaction().isActive()); //test that the data has been stored try { Object result = em.createQuery("from JpaTestEntity where text = :text") .setParameter("text", TRANSIENT_UNIQUE_TEXT).getSingleResult(); injector.getInstance(UnitOfWork.class).end(); fail("a result was returned! rollback sure didnt happen!!!"); } catch (NoResultException e) {} } public void testSimpleTransactionRollbackOnUnchecked() { try { injector.getInstance(TransactionalObject.class).runOperationInTxnThrowingUnchecked(); } catch (RuntimeException re) { //ignore injector.getInstance(UnitOfWork.class).end(); } EntityManager em = injector.getInstance(EntityManager.class); assertFalse("Session was not closed by transactional service (rollback didnt happen?)", em.getTransaction().isActive()); try { Object result = em.createQuery("from JpaTestEntity where text = :text") .setParameter("text", TRANSIENT_UNIQUE_TEXT).getSingleResult(); injector.getInstance(UnitOfWork.class).end(); fail("a result was returned! rollback sure didnt happen!!!"); } catch (NoResultException e) {} } public static class TransactionalObject { private final EntityManager em; @Inject public TransactionalObject(EntityManager em) { this.em = em; } @Transactional public void runOperationInTxn() { JpaTestEntity entity = new JpaTestEntity(); entity.setText(UNIQUE_TEXT); em.persist(entity); } @Transactional public JpaTestEntity runOperationInTxnWithMerge() { JpaTestEntity entity = new JpaTestEntity(); entity.setText(UNIQUE_TEXT_MERGE); return em.merge(entity); } @Transactional(rollbackOn = IOException.class) public void runOperationInTxnThrowingChecked() throws IOException { JpaTestEntity entity = new JpaTestEntity(); entity.setText(TRANSIENT_UNIQUE_TEXT); em.persist(entity); throw new IOException(); } @Transactional public void runOperationInTxnThrowingUnchecked() { JpaTestEntity entity = new JpaTestEntity(); entity.setText(TRANSIENT_UNIQUE_TEXT); em.persist(entity); throw new IllegalStateException(); } } } Other Java examples (source code examples)Here is a short list of links related to this Java ManagedLocalTransactionsTest.java source code file: |
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