Hibernate example source code file (QueryLockingTest.java)

This example Hibernate source code file (QueryLockingTest.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

baseentitymanagerfunctionaltestcase, class, entitymanager, entitymanager, integer, integer, lockable, lockable, override, queryimpl, querylockingtest, suppresswarnings, test, test, util

The Hibernate QueryLockingTest.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, 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.lock;

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

import org.hibernate.LockMode;
import org.hibernate.ejb.AvailableSettings;
import org.hibernate.ejb.QueryImpl;
import org.hibernate.ejb.test.BaseEntityManagerFunctionalTestCase;
import org.hibernate.internal.SessionImpl;

import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

/**
 * @author Steve Ebersole
 */
public class QueryLockingTest extends BaseEntityManagerFunctionalTestCase {
	@Override
	protected Class<?>[] getAnnotatedClasses() {
		return new Class[] { Lockable.class };
	}

	@Override
	@SuppressWarnings({ "unchecked" })
	protected void addConfigOptions(Map options) {
		options.put( org.hibernate.cfg.AvailableSettings.USE_NEW_ID_GENERATOR_MAPPINGS, "true" );
	}

	@Test
	public void testOverallLockMode() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		QueryImpl jpaQuery = em.createQuery( "from Lockable l" ).unwrap( QueryImpl.class );

		org.hibernate.internal.QueryImpl hqlQuery = (org.hibernate.internal.QueryImpl) jpaQuery.getHibernateQuery();
		assertEquals( LockMode.NONE, hqlQuery.getLockOptions().getLockMode() );
		assertNull( hqlQuery.getLockOptions().getAliasSpecificLockMode( "l" ) );
		assertEquals( LockMode.NONE, hqlQuery.getLockOptions().getEffectiveLockMode( "l" ) );

		// NOTE : LockModeType.READ should map to LockMode.OPTIMISTIC
		jpaQuery.setLockMode( LockModeType.READ );
		assertEquals( LockMode.OPTIMISTIC, hqlQuery.getLockOptions().getLockMode() );
		assertNull( hqlQuery.getLockOptions().getAliasSpecificLockMode( "l" ) );
		assertEquals( LockMode.OPTIMISTIC, hqlQuery.getLockOptions().getEffectiveLockMode( "l" ) );

		jpaQuery.setHint( AvailableSettings.ALIAS_SPECIFIC_LOCK_MODE+".l", LockModeType.PESSIMISTIC_WRITE );
		assertEquals( LockMode.OPTIMISTIC, hqlQuery.getLockOptions().getLockMode() );
		assertEquals( LockMode.PESSIMISTIC_WRITE, hqlQuery.getLockOptions().getAliasSpecificLockMode( "l" ) );
		assertEquals( LockMode.PESSIMISTIC_WRITE, hqlQuery.getLockOptions().getEffectiveLockMode( "l" ) );

		em.getTransaction().commit();
		em.close();
	}

	@Test
	public void testPessimisticForcedIncrementOverall() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable lock = new Lockable( "name" );
		em.persist( lock );
		em.getTransaction().commit();
		em.close();
		Integer initial = lock.getVersion();
		assertNotNull( initial );

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable reread = em.createQuery( "from Lockable", Lockable.class ).setLockMode( LockModeType.PESSIMISTIC_FORCE_INCREMENT ).getSingleResult();
		assertFalse( reread.getVersion().equals( initial ) );
		em.getTransaction().commit();
		em.close();

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		em.remove( em.getReference( Lockable.class, reread.getId() ) );
		em.getTransaction().commit();
		em.close();
	}

	@Test
	public void testPessimisticForcedIncrementSpecific() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable lock = new Lockable( "name" );
		em.persist( lock );
		em.getTransaction().commit();
		em.close();
		Integer initial = lock.getVersion();
		assertNotNull( initial );

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable reread = em.createQuery( "from Lockable l", Lockable.class )
				.setHint( AvailableSettings.ALIAS_SPECIFIC_LOCK_MODE+".l", LockModeType.PESSIMISTIC_FORCE_INCREMENT )
				.getSingleResult();
		assertFalse( reread.getVersion().equals( initial ) );
		em.getTransaction().commit();
		em.close();

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		em.remove( em.getReference( Lockable.class, reread.getId() ) );
		em.getTransaction().commit();
		em.close();
	}

	@Test
	public void testOptimisticForcedIncrementOverall() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable lock = new Lockable( "name" );
		em.persist( lock );
		em.getTransaction().commit();
		em.close();
		Integer initial = lock.getVersion();
		assertNotNull( initial );

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable reread = em.createQuery( "from Lockable", Lockable.class ).setLockMode( LockModeType.OPTIMISTIC_FORCE_INCREMENT ).getSingleResult();
		assertEquals( initial, reread.getVersion() );
		em.getTransaction().commit();
		em.close();
		assertFalse( reread.getVersion().equals( initial ) );

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		em.remove( em.getReference( Lockable.class, reread.getId() ) );
		em.getTransaction().commit();
		em.close();
	}

	@Test
	public void testOptimisticForcedIncrementSpecific() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable lock = new Lockable( "name" );
		em.persist( lock );
		em.getTransaction().commit();
		em.close();
		Integer initial = lock.getVersion();
		assertNotNull( initial );

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable reread = em.createQuery( "from Lockable l", Lockable.class )
				.setHint( AvailableSettings.ALIAS_SPECIFIC_LOCK_MODE+".l", LockModeType.OPTIMISTIC_FORCE_INCREMENT )
				.getSingleResult();
		assertEquals( initial, reread.getVersion() );
		em.getTransaction().commit();
		em.close();
		assertFalse( reread.getVersion().equals( initial ) );

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		em.remove( em.getReference( Lockable.class, reread.getId() ) );
		em.getTransaction().commit();
		em.close();
	}

	@Test
	public void testOptimisticOverall() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable lock = new Lockable( "name" );
		em.persist( lock );
		em.getTransaction().commit();
		em.close();
		Integer initial = lock.getVersion();
		assertNotNull( initial );

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable reread = em.createQuery( "from Lockable", Lockable.class )
				.setLockMode( LockModeType.OPTIMISTIC )
				.getSingleResult();
		assertEquals( initial, reread.getVersion() );
		assertTrue( em.unwrap( SessionImpl.class ).getActionQueue().hasBeforeTransactionActions() );
		em.getTransaction().commit();
		em.close();
		assertEquals( initial, reread.getVersion() );

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		em.remove( em.getReference( Lockable.class, reread.getId() ) );
		em.getTransaction().commit();
		em.close();
	}

	@Test
	public void testOptimisticSpecific() {
		EntityManager em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable lock = new Lockable( "name" );
		em.persist( lock );
		em.getTransaction().commit();
		em.close();
		Integer initial = lock.getVersion();
		assertNotNull( initial );

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		Lockable reread = em.createQuery( "from Lockable l", Lockable.class )
				.setHint( AvailableSettings.ALIAS_SPECIFIC_LOCK_MODE+".l", LockModeType.OPTIMISTIC )
				.getSingleResult();
		assertEquals( initial, reread.getVersion() );
		assertTrue( em.unwrap( SessionImpl.class ).getActionQueue().hasBeforeTransactionActions() );
		em.getTransaction().commit();
		em.close();
		assertEquals( initial, reread.getVersion() );

		em = getOrCreateEntityManager();
		em.getTransaction().begin();
		em.remove( em.getReference( Lockable.class, reread.getId() ) );
		em.getTransaction().commit();
		em.close();
	}
}