Hibernate example source code file (RemoveTest.java)

This example Hibernate source code file (RemoveTest.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, competitor, competitor, entitymanager, entitymanager, exception, music, optimisticlockexception, override, race, race, removetest, test, test, util

The Hibernate RemoveTest.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.emops;

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

import org.jboss.logging.Logger;

import org.hibernate.ejb.test.BaseEntityManagerFunctionalTestCase;

import org.junit.Assert;
import org.junit.Test;

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

	@Test
	public void testRemove() {
		Race race = new Race();
		race.competitors.add( new Competitor() );
		race.competitors.add( new Competitor() );
		race.competitors.add( new Competitor() );
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		em.persist( race );
		em.flush();
		em.remove( race );
		em.flush();
		em.getTransaction().rollback();
		em.close();
	}

	@Test
	public void testRemoveAndFind() {
		Race race = new Race();
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		em.persist( race );
		em.remove( race );
		Assert.assertNull( em.find( Race.class, race.id ) );
		em.getTransaction().rollback();
		em.close();
	}

	@Test
	public void testUpdatedAndRemove() throws Exception {
		Music music = new Music();
		music.setName( "Classical" );
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		em.persist( music );
		em.getTransaction().commit();
		em.clear();


		EntityManager em2 = entityManagerFactory().createEntityManager();
		try {
			em2.getTransaction().begin();
			//read music from 2nd EM
			music = em2.find( Music.class, music.getId() );
		}
		catch (Exception e) {
			em2.getTransaction().rollback();
			em2.close();
			throw e;
		}

		//change music
        em = getOrCreateEntityManager();
		em.getTransaction().begin();
		em.find( Music.class, music.getId() ).setName( "Rap" );
		em.getTransaction().commit();

		try {
			em2.remove( music ); //remove changed music
			em2.flush();
			Assert.fail( "should have an optimistic lock exception" );
		}
        catch( OptimisticLockException e ) {
            log.debug("success");
		}
		finally {
			em2.getTransaction().rollback();
			em2.close();
		}

		//clean
        em.getTransaction().begin();
		em.remove( em.find( Music.class, music.getId() ) );
	    em.getTransaction().commit();
		em.close();
	}

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


	@Override
	@SuppressWarnings( {"unchecked"})
	protected void addConfigOptions(Map options) {
		options.put( "hibernate.jdbc.batch_size", "0" );
	}
}