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Java example source code file (ClassLevelManagedLocalTransactionsTest.java)

This example Java source code file (ClassLevelManagedLocalTransactionsTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

date, entitymanager, filenotfoundexception, inject, ioexception, jpapersistmodule, jpasome, jpatestentity, list, object, string, transactional, transactionalobject2, unique_text, util

The ClassLevelManagedLocalTransactionsTest.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 junit.framework.TestCase;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Date;
import java.util.List;

import javax.persistence.EntityManager;

/**
 * This test asserts class level @Transactional annotation behavior.
 *
 * Class-level @Transactional is a shortcut if all non-private methods in the class are meant to be
 * transactional.
 *
 * @author Dhanji R. Prasanna (dhanji@gmail.com)
 */

public class ClassLevelManagedLocalTransactionsTest extends TestCase {
  private Injector injector;
  private static final String UNIQUE_TEXT = "JPAsome unique text88888" + new Date();
  private static final String UNIQUE_TEXT_2 = "JPAsome asda unique teasdalsdplasdxt" + new Date();
  private static final String TRANSIENT_UNIQUE_TEXT = "JPAsome other unique texaksoksojadasdt"
      + new Date();

  public void setUp() {
    injector = Guice.createInjector(new JpaPersistModule("testUnit"));

    //startup persistence
    injector.getInstance(PersistService.class).start();
  }

  public void tearDown() {
    injector.getInstance(PersistService.class).stop();
    injector = null;
  }

  public void testSimpleTransaction() {
    injector.getInstance(TransactionalObject.class).runOperationInTxn();

    EntityManager session = injector.getInstance(EntityManager.class);
    assertFalse("EntityManager was not closed by transactional service",
        session.getTransaction().isActive());

    //test that the data has been stored
    session.getTransaction().begin();
    Object result = session.createQuery("from JpaTestEntity where text = :text")
        .setParameter("text", UNIQUE_TEXT).getSingleResult();

    session.getTransaction().commit();

    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 testSimpleTransactionRollbackOnChecked() {
    try {
      injector.getInstance(TransactionalObject2.class).runOperationInTxnThrowingChecked();
    } catch (IOException e) {
      //ignore
    }

    EntityManager session = injector.getInstance(EntityManager.class);
    assertFalse("EntityManager was not closed by transactional service (rollback didnt happen?)",
        session.getTransaction().isActive());

    //test that the data has been stored
    session.getTransaction().begin();
    List<?> result = session.createQuery("from JpaTestEntity where text = :text")
        .setParameter("text", TRANSIENT_UNIQUE_TEXT).getResultList();

    session.getTransaction().commit();

    assertTrue("a result was returned! rollback sure didnt happen!!!", result.isEmpty());
  }

  public void testSimpleTransactionRollbackOnCheckedExcepting() {
    Exception ex = null;
    try {
      injector.getInstance(TransactionalObject3.class).runOperationInTxnThrowingCheckedExcepting();
      fail("Exception was not thrown by test txn-al method!");
    } catch (IOException e) {
      //ignored
    }

    EntityManager session = injector.getInstance(EntityManager.class);
    assertFalse("Txn was not closed by transactional service (commit didnt happen?)",
        session.getTransaction().isActive());

    //test that the data has been stored
    session.getTransaction().begin();
    Object result = session.createQuery("from JpaTestEntity where text = :text")
        .setParameter("text", UNIQUE_TEXT_2).getSingleResult();

    session.getTransaction().commit();

    assertNotNull("a result was not returned! rollback happened anyway (ignore failed)!!!",
        result);
  }

  public void testSimpleTransactionRollbackOnUnchecked() {
    try {
      injector.getInstance(TransactionalObject4.class).runOperationInTxnThrowingUnchecked();
    } catch (RuntimeException re) {
      //ignore
    }

    EntityManager session = injector.getInstance(EntityManager.class);
    assertFalse("EntityManager was not closed by transactional service (rollback didnt happen?)",
        session.getTransaction().isActive());

    //test that the data has been stored
    session.getTransaction().begin();
    List<?> result = session.createQuery("from JpaTestEntity where text = :text")
        .setParameter("text", TRANSIENT_UNIQUE_TEXT).getResultList();

    session.getTransaction().commit();

    assertTrue("a result was returned! rollback sure didnt happen!!!",
        result.isEmpty());
  }

  @Transactional
  public static class TransactionalObject {
    @Inject EntityManager session;

    public void runOperationInTxn() {
      assertTrue(session.getTransaction().isActive());
      JpaTestEntity entity = new JpaTestEntity();
      entity.setText(UNIQUE_TEXT);
      session.persist(entity);
    }

  }

  @Transactional
  public static class TransactionalObject4 {
    @Inject EntityManager session;

    @Transactional
    public void runOperationInTxnThrowingUnchecked() {
      assertTrue(session.getTransaction().isActive());
      JpaTestEntity entity = new JpaTestEntity();
      entity.setText(TRANSIENT_UNIQUE_TEXT);
      session.persist(entity);

      throw new IllegalStateException();
    }
  }

  @Transactional(rollbackOn = IOException.class, ignore = FileNotFoundException.class)
  public static class TransactionalObject3 {
    @Inject EntityManager session;

    public void runOperationInTxnThrowingCheckedExcepting() throws IOException {
      assertTrue(session.getTransaction().isActive());
      JpaTestEntity entity = new JpaTestEntity();
      entity.setText(UNIQUE_TEXT_2);
      session.persist(entity);

      throw new FileNotFoundException();
    }
  }

  @Transactional(rollbackOn = IOException.class)
  public static class TransactionalObject2 {
    @Inject EntityManager session;

    public void runOperationInTxnThrowingChecked() throws IOException {
      assertTrue(session.getTransaction().isActive());
      JpaTestEntity entity = new JpaTestEntity();
      entity.setText(TRANSIENT_UNIQUE_TEXT);
      session.persist(entity);

      throw new IOException();
    }
  }
}

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