Hibernate example source code file (ExceptionTest.java)

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

Java - Hibernate tags/keywords

class, entitymanager, entitymanager, exception, exception, instrument, jazz, music, music, musician, override, should, test, test, util

The Hibernate ExceptionTest.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.ejb.test.exception;

import javax.persistence.EntityManager;
import javax.persistence.EntityNotFoundException;
import javax.persistence.OptimisticLockException;
import javax.persistence.PersistenceException;
import java.util.Map;

import org.jboss.logging.Logger;

import org.hibernate.cfg.Environment;
import org.hibernate.ejb.test.BaseEntityManagerFunctionalTestCase;
import org.hibernate.exception.ConstraintViolationException;

import org.junit.Test;

import org.hibernate.testing.TestForIssue;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

/**
 * @author Emmanuel Bernard
 */
@SuppressWarnings("unchecked")
public class ExceptionTest extends BaseEntityManagerFunctionalTestCase {
	private static final Logger log = Logger.getLogger( ExceptionTest.class );

	@Test
	public void testOptimisticLockingException() throws Exception {
		EntityManager em = getOrCreateEntityManager();
		EntityManager em2 = entityManagerFactory().createEntityManager();
		em.getTransaction().begin();
		Music music = new Music();
		music.setName( "Old Country" );
		em.persist( music );
		em.getTransaction().commit();

		try {
			em2.getTransaction().begin();
			Music music2 = em2.find( Music.class, music.getId() );
			music2.setName( "HouseMusic" );
			em2.getTransaction().commit();
		}
		catch ( Exception e ) {
			em2.getTransaction().rollback();
			throw e;
		}
		finally {
			em2.close();
		}

		em.getTransaction().begin();
		music.setName( "Rock" );
		try {

			em.flush();
			fail( "Should raise an optimistic lock exception" );
		}
		catch ( OptimisticLockException e ) {
			//success
			assertEquals( music, e.getEntity() );
		}
		catch ( Exception e ) {
			fail( "Should raise an optimistic lock exception" );
		}
		finally {
			em.getTransaction().rollback();
			em.close();
		}
	}

	@Test
	public void testEntityNotFoundException() throws Exception {
		EntityManager em = getOrCreateEntityManager();
		Music music = em.getReference( Music.class, -1 );
		try {
			music.getName();
			fail( "Non existent entity should raise an exception when state is accessed" );
		}
		catch ( EntityNotFoundException e ) {
            log.debug("success");
		}
		finally {
			em.close();
		}
	}

	@Test
	public void testConstraintViolationException() throws Exception {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Music music = new Music();
		music.setName( "Jazz" );
		em.persist( music );
		Musician lui = new Musician();
		lui.setName( "Lui Armstrong" );
		lui.setFavouriteMusic( music );
		em.persist( lui );
		em.getTransaction().commit();
		try {
			em.getTransaction().begin();
			String hqlDelete = "delete Music where name = :name";
			em.createQuery( hqlDelete ).setParameter( "name", "Jazz" ).executeUpdate();
			em.getTransaction().commit();
			fail();
		}
		catch ( PersistenceException e ) {
			Throwable t = e.getCause();
			assertTrue( "Should be a constraint violation", t instanceof ConstraintViolationException );
			em.getTransaction().rollback();
		}
		finally {
			em.close();
		}
	}

	@Test
	@TestForIssue( jiraKey = "HHH-4676" )
	public void testInterceptor() throws Exception {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Instrument instrument = new Instrument();
		instrument.setName( "Guitar" );
		try {
			em.persist( instrument );
			fail( "Commit should have failed." );
		}
		catch ( RuntimeException e ) {
			assertTrue( em.getTransaction().getRollbackOnly() );
		}
		em.close();
	}

	@Override
	protected void addConfigOptions(Map options) {
		options.put( Environment.BATCH_VERSIONED_DATA, "false" );
	}

	@Override
    public Class[] getAnnotatedClasses() {
		return new Class[] {
				Music.class, Musician.class, Instrument.class
		};
	}
}