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Hibernate example source code file (ProxyTest.java)

This example Hibernate source code file (ProxyTest.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

bigdecimal, container, container, datapoint, datapoint, lazyinitializationexception, long, long, math, object, owner, session, session, test, transaction, util

The Hibernate ProxyTest.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2006-2011, 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.test.proxy;

import java.math.BigDecimal;
import java.util.List;

import org.hibernate.FlushMode;
import org.hibernate.Hibernate;
import org.hibernate.LazyInitializationException;
import org.hibernate.LockMode;
import org.hibernate.LockOptions;
import org.hibernate.ObjectNotFoundException;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.internal.SessionImpl;
import org.hibernate.internal.util.SerializationHelper;
import org.hibernate.proxy.HibernateProxy;

import org.junit.Test;

import org.hibernate.testing.FailureExpected;
import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;

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

/**
 * @author Gavin King
 */
public class ProxyTest extends BaseCoreFunctionalTestCase {
	@Override
	public String[] getMappings() {
		return new String[] { "proxy/DataPoint.hbm.xml" };
	}

	@Override
	public void configure(Configuration cfg) {
		super.configure( cfg );
		cfg.setProperty( Environment.STATEMENT_BATCH_SIZE, "0" ); // problem on HSQLDB (go figure)
	}

	@Override
	public String getCacheConcurrencyStrategy() {
		return null;
	}

	@Test
	public void testFinalizeFiltered() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		DataPoint dp = new DataPoint();
		dp.setDescription("a data point");
		dp.setX( new BigDecimal(1.0) );
		dp.setY( new BigDecimal(2.0) );
		s.persist(dp);
		s.flush();
		s.clear();

		dp = (DataPoint) s.load(DataPoint.class, new Long( dp.getId() ) );
		assertFalse( Hibernate.isInitialized(dp) );

		try {
			dp.getClass().getDeclaredMethod( "finalize", (Class[]) null );
			fail();

		}
		catch (NoSuchMethodException e) {}

		s.delete(dp);
		t.commit();
		s.close();

	}

	@Test
	public void testProxyException() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		DataPoint dp = new DataPoint();
		dp.setDescription("a data point");
		dp.setX( new BigDecimal(1.0) );
		dp.setY( new BigDecimal(2.0) );
		s.persist(dp);
		s.flush();
		s.clear();

		dp = (DataPoint) s.load(DataPoint.class, new Long( dp.getId() ) );
		assertFalse( Hibernate.isInitialized(dp) );

		try {
			dp.exception();
			fail();
		}
		catch (Exception e) {
			assertTrue( e.getClass()==Exception.class );
		}
		s.delete(dp);
		t.commit();
		s.close();
	}

	@Test
	public void testProxySerializationAfterSessionClosed() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		DataPoint dp = new DataPoint();
		dp.setDescription("a data point");
		dp.setX( new BigDecimal(1.0) );
		dp.setY( new BigDecimal(2.0) );
		s.persist(dp);
		s.flush();
		s.clear();

		dp = (DataPoint) s.load( DataPoint.class, new Long( dp.getId() ) );
		assertFalse( Hibernate.isInitialized(dp) );
		s.close();
		SerializationHelper.clone( dp );

		s = openSession();
		t = s.beginTransaction();
		s.delete( dp );
		t.commit();
		s.close();
	}

	@Test
	public void testInitializedProxySerializationAfterSessionClosed() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		DataPoint dp = new DataPoint();
		dp.setDescription("a data point");
		dp.setX( new BigDecimal(1.0) );
		dp.setY( new BigDecimal(2.0) );
		s.persist(dp);
		s.flush();
		s.clear();

		dp = (DataPoint) s.load( DataPoint.class, new Long( dp.getId() ) );
		assertFalse( Hibernate.isInitialized(dp) );
		Hibernate.initialize( dp );
		assertTrue( Hibernate.isInitialized(dp) );
		s.close();
		SerializationHelper.clone( dp );

		s = openSession();
		t = s.beginTransaction();
		s.delete( dp );
		t.commit();
		s.close();
	}

	@Test
	public void testProxySerialization() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		DataPoint dp = new DataPoint();
		dp.setDescription("a data point");
		dp.setX( new BigDecimal(1.0) );
		dp.setY( new BigDecimal(2.0) );
		s.persist(dp);
		s.flush();
		s.clear();

		dp = (DataPoint) s.load( DataPoint.class, new Long( dp.getId() ) );
		assertFalse( Hibernate.isInitialized(dp) );
		dp.getId();
		assertFalse( Hibernate.isInitialized(dp) );
		dp.getDescription();
		assertTrue( Hibernate.isInitialized(dp) );
		Object none = s.load( DataPoint.class, new Long(666));
		assertFalse( Hibernate.isInitialized(none) );

		t.commit();
		s.disconnect();

		Object[] holder = new Object[] { s, dp, none };

		holder = (Object[]) SerializationHelper.clone(holder);
		Session sclone = (Session) holder[0];
		dp = (DataPoint) holder[1];
		none = holder[2];

		//close the original:
		s.close();

		t = sclone.beginTransaction();

		DataPoint sdp = (DataPoint) sclone.load( DataPoint.class, new Long( dp.getId() ) );
		assertSame(dp, sdp);
		assertFalse(sdp instanceof HibernateProxy);
		Object snone = sclone.load( DataPoint.class, new Long(666) );
		assertSame(none, snone);
		assertTrue(snone instanceof HibernateProxy);

		sclone.delete(dp);

		t.commit();
		sclone.close();

	}

	@Test
	public void testProxy() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		DataPoint dp = new DataPoint();
		dp.setDescription("a data point");
		dp.setX( new BigDecimal(1.0) );
		dp.setY( new BigDecimal(2.0) );
		s.persist(dp);
		s.flush();
		s.clear();

		dp = (DataPoint) s.load( DataPoint.class, new Long(dp.getId() ));
		assertFalse( Hibernate.isInitialized(dp) );
		DataPoint dp2 = (DataPoint) s.get( DataPoint.class, new Long(dp.getId()) );
		assertSame(dp, dp2);
		assertTrue( Hibernate.isInitialized(dp) );
		s.clear();

		dp = (DataPoint) s.load( DataPoint.class, new Long( dp.getId() ) );
		assertFalse( Hibernate.isInitialized(dp) );
		dp2 = (DataPoint) s.load( DataPoint.class, new Long( dp.getId() ), LockMode.NONE );
		assertSame(dp, dp2);
		assertFalse( Hibernate.isInitialized(dp) );
		s.clear();

		dp = (DataPoint) s.load( DataPoint.class, new Long( dp.getId() ) );
		assertFalse( Hibernate.isInitialized(dp) );
		dp2 = (DataPoint) s.load( DataPoint.class, new Long( dp.getId() ), LockMode.READ );
		assertSame(dp, dp2);
		assertTrue( Hibernate.isInitialized(dp) );
		s.clear();

		dp = (DataPoint) s.load( DataPoint.class, new Long (dp.getId() ));
		assertFalse( Hibernate.isInitialized(dp) );
		dp2 = (DataPoint) s.get( DataPoint.class, new Long ( dp.getId() ) , LockMode.READ );
		assertSame(dp, dp2);
		assertTrue( Hibernate.isInitialized(dp) );
		s.clear();

		dp = (DataPoint) s.load( DataPoint.class, new Long  ( dp.getId() ) );
		assertFalse( Hibernate.isInitialized(dp) );
		dp2 = (DataPoint) s.createQuery("from DataPoint").uniqueResult();
		assertSame(dp, dp2);
		assertTrue( Hibernate.isInitialized(dp) );
		s.delete( dp );
		t.commit();
		s.close();
	}

	@Test
	public void testSubsequentNonExistentProxyAccess() {
		Session s = openSession();
		Transaction t = s.beginTransaction();

		DataPoint proxy = ( DataPoint ) s.load( DataPoint.class, new Long(-1) );
		assertFalse( Hibernate.isInitialized( proxy ) );
		try {
			proxy.getDescription();
			fail( "proxy access did not fail on non-existent proxy" );
		}
		catch( ObjectNotFoundException onfe ) {
			// expected
		}
		catch( Throwable e ) {
			fail( "unexpected exception type on non-existent proxy access : " + e );
		}
		// try it a second (subsequent) time...
		try {
			proxy.getDescription();
			fail( "proxy access did not fail on non-existent proxy" );
		}
		catch( ObjectNotFoundException onfe ) {
			// expected
		}
		catch( Throwable e ) {
			fail( "unexpected exception type on non-existent proxy access : " + e );
		}

		t.commit();
		s.close();
	}

	@SuppressWarnings( {"unchecked"})
	@Test
	public void testProxyEviction() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		Container container = new Container( "container" );
		container.setOwner( new Owner( "owner" ) );
		container.setInfo( new Info( "blah blah blah" ) );
		container.getDataPoints().add( new DataPoint( new BigDecimal( 1 ), new BigDecimal( 1 ), "first data point" ) );
		container.getDataPoints().add( new DataPoint( new BigDecimal( 2 ), new BigDecimal( 2 ), "second data point" ) );
		s.save( container );
		t.commit();
		s.close();

		s = openSession();
		t = s.beginTransaction();
		Container c = ( Container ) s.load( Container.class, container.getId() );
		assertFalse( Hibernate.isInitialized( c ) );
		s.evict( c );
		try {
			c.getName();
			fail( "expecting LazyInitializationException" );
		}
		catch( LazyInitializationException e ) {
			// expected result
		}

		c = ( Container ) s.load( Container.class, container.getId() );
		assertFalse( Hibernate.isInitialized( c ) );
		Info i = c.getInfo();
		assertTrue( Hibernate.isInitialized( c ) );
		assertFalse( Hibernate.isInitialized( i ) );
		s.evict( c );
		try {
			i.getDetails();
			fail( "expecting LazyInitializationException" );
		}
		catch( LazyInitializationException e ) {
			// expected result
		}

		s.delete( c );

		t.commit();
		s.close();
	}

	@Test
	public void testFullyLoadedPCSerialization() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		Long lastContainerId = null;
		int containerCount = 10;
		int nestedDataPointCount = 5;
		for ( int c_indx = 0; c_indx < containerCount; c_indx++ ) {
			Owner owner = new Owner( "Owner #" + c_indx );
			Container container = new Container( "Container #" + c_indx );
			container.setOwner( owner );
			for ( int dp_indx = 0; dp_indx < nestedDataPointCount; dp_indx++ ) {
				DataPoint dp = new DataPoint();
				dp.setDescription( "data-point [" + c_indx + ", " + dp_indx + "]" );
// more HSQLDB fun...
//				dp.setX( new BigDecimal( c_indx ) );
				dp.setX( new BigDecimal( c_indx + dp_indx ) );
				dp.setY( new BigDecimal( dp_indx ) );
				container.getDataPoints().add( dp );
			}
			s.save( container );
			lastContainerId = container.getId();
		}
		t.commit();
		s.close();

		s = openSession();
		s.setFlushMode( FlushMode.MANUAL );
		t = s.beginTransaction();
		// load the last container as a proxy
		Container proxy = ( Container ) s.load( Container.class, lastContainerId );
		assertFalse( Hibernate.isInitialized( proxy ) );
		// load the rest back into the PC
		List all = s.createQuery( "from Container as c inner join fetch c.owner inner join fetch c.dataPoints where c.id <> :last" )
				.setLong( "last", lastContainerId.longValue() )
				.list();
		Container container = ( Container ) all.get( 0 );
		s.delete( container );
		// force a snapshot retrieval of the proxied container
		SessionImpl sImpl = ( SessionImpl ) s;
		sImpl.getPersistenceContext().getDatabaseSnapshot(
				lastContainerId,
		        sImpl.getFactory().getEntityPersister( Container.class.getName() )
		);
		assertFalse( Hibernate.isInitialized( proxy ) );
		t.commit();

//		int iterations = 50;
//		long cumulativeTime = 0;
//		long cumulativeSize = 0;
//		for ( int i = 0; i < iterations; i++ ) {
//			final long start = System.currentTimeMillis();
//			byte[] bytes = SerializationHelper.serialize( s );
//			SerializationHelper.deserialize( bytes );
//			final long end = System.currentTimeMillis();
//			cumulativeTime += ( end - start );
//			int size = bytes.length;
//			cumulativeSize += size;
////			System.out.println( "Iteration #" + i + " took " + ( end - start ) + " ms : size = " + size + " bytes" );
//		}
//		System.out.println( "Average time : " + ( cumulativeTime / iterations ) + " ms" );
//		System.out.println( "Average size : " + ( cumulativeSize / iterations ) + " bytes" );

		byte[] bytes = SerializationHelper.serialize( s );
		SerializationHelper.deserialize( bytes );

		t = s.beginTransaction();
		int count = s.createQuery( "delete DataPoint" ).executeUpdate();
		assertEquals( "unexpected DP delete count", ( containerCount * nestedDataPointCount ), count );
		count = s.createQuery( "delete Container" ).executeUpdate();
		assertEquals( "unexpected container delete count", containerCount, count );
		count = s.createQuery( "delete Owner" ).executeUpdate();
		assertEquals( "unexpected owner delete count", containerCount, count );
		t.commit();
		s.close();
	}

	@Test
	public void testRefreshLockInitializedProxy() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		DataPoint dp = newPersistentDataPoint( s );

		dp = ( DataPoint ) s.load( DataPoint.class, new Long( dp.getId() ) );
		dp.getX();
		assertTrue( Hibernate.isInitialized( dp ) );

		s.refresh( dp, LockOptions.UPGRADE );
		assertSame( LockOptions.UPGRADE.getLockMode(), s.getCurrentLockMode( dp ) );

		s.delete( dp );
		t.commit();
		s.close();
	}

	@Test
	@FailureExpected( jiraKey = "HHH-1645", message = "Session.refresh with LockOptions does not work on uninitialized proxies" )
	public void testRefreshLockUninitializedProxy() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		DataPoint dp = newPersistentDataPoint( s );

		dp = ( DataPoint ) s.load( DataPoint.class, new Long( dp.getId() ) );
		assertFalse( Hibernate.isInitialized( dp ) );

		s.refresh( dp, LockOptions.UPGRADE );
		assertSame( LockOptions.UPGRADE.getLockMode(), s.getCurrentLockMode( dp ) );

		s.delete( dp );
		t.commit();
		s.close();
	}

	private static DataPoint newPersistentDataPoint(Session s) {
		DataPoint dp = new DataPoint();
		dp.setDescription( "a data point" );
		dp.setX( new BigDecimal( 1.0 ) );
		dp.setY( new BigDecimal( 2.0 ) );
		s.persist( dp );
		s.flush();
		s.clear();
		return dp;
	}

	@Test
	@FailureExpected( jiraKey = "HHH-1645", message = "Session.refresh with LockOptions does not work on uninitialized proxies" )
	public void testRefreshLockUninitializedProxyThenRead() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		DataPoint dp = newPersistentDataPoint( s );

		dp = ( DataPoint ) s.load( DataPoint.class, new Long( dp.getId() ) );
		assertFalse( Hibernate.isInitialized( dp ) );
		s.refresh( dp, LockOptions.UPGRADE );
		dp.getX();
		assertSame( LockOptions.UPGRADE.getLockMode(), s.getCurrentLockMode( dp ) );

		s.delete( dp );
		t.commit();
		s.close();
	}

	@Test
	public void testLockUninitializedProxy() {
		Session s = openSession();
		Transaction t = s.beginTransaction();
		DataPoint dp = newPersistentDataPoint( s );

		dp = ( DataPoint) s.load( DataPoint.class, new Long( dp.getId() ) );
		assertFalse( Hibernate.isInitialized( dp ) );
		s.buildLockRequest( LockOptions.UPGRADE ).lock( dp );
		assertSame( LockOptions.UPGRADE.getLockMode(), s.getCurrentLockMode( dp ) );

		s.delete( dp );
		t.commit();
		s.close();
	}
}

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