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Hibernate example source code file (AggressiveReleaseTest.java)

This example Hibernate source code file (AggressiveReleaseTest.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

connection, id, jdbc, jdbcconnectionaccessimpl, journalingconnectionobserver, journalingconnectionobserver, logicalconnectionimpl, logicalconnectionimpl, name, preparedstatement, sandbox_jdbc_tst, sandbox_jdbc_tst, sql, sqlexception, sqlexception, test

The Hibernate AggressiveReleaseTest.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.test.jdbc.proxies;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;

import org.hibernate.ConnectionReleaseMode;
import org.hibernate.engine.jdbc.internal.LogicalConnectionImpl;
import org.hibernate.engine.jdbc.internal.proxy.ProxyBuilder;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import org.hibernate.testing.junit4.BaseUnitTestCase;
import org.hibernate.test.common.BasicTestingJdbcServiceImpl;
import org.hibernate.test.common.JdbcConnectionAccessImpl;
import org.hibernate.test.common.JournalingConnectionObserver;

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

/**
 * @author Steve Ebersole
 */
public class AggressiveReleaseTest extends BaseUnitTestCase {
	private BasicTestingJdbcServiceImpl services = new BasicTestingJdbcServiceImpl();

	@Before
	public void setUp() throws SQLException {
		services.prepare( true );

		Connection connection = null;
		Statement stmnt = null;
		try {
			connection = services.getConnectionProvider().getConnection();
			stmnt = connection.createStatement();
			stmnt.execute( "drop table SANDBOX_JDBC_TST if exists" );
			stmnt.execute( "create table SANDBOX_JDBC_TST ( ID integer, NAME varchar(100) )" );
		}
		finally {
			if ( stmnt != null ) {
				try {
					stmnt.close();
				}
				catch ( SQLException ignore ) {
				}
			}
			if ( connection != null ) {
				try {
					connection.close();
				}
				catch ( SQLException ignore ) {
				}
			}
		}
	}

	@After
	public void tearDown() throws SQLException {
		Connection connection = null;
		Statement stmnt = null;
		try {
			connection = services.getConnectionProvider().getConnection();
			stmnt = connection.createStatement();
			stmnt.execute( "drop table SANDBOX_JDBC_TST if exists" );
		}
		finally {
			if ( stmnt != null ) {
				try {
					stmnt.close();
				}
				catch ( SQLException ignore ) {
				}
			}
			if ( connection != null ) {
				try {
					connection.close();
				}
				catch ( SQLException ignore ) {
				}
			}
		}

		services.release();
	}

	@Test
	public void testBasicRelease() {
		LogicalConnectionImpl logicalConnection = new LogicalConnectionImpl(
				null,
				ConnectionReleaseMode.AFTER_STATEMENT,
				services ,
				new JdbcConnectionAccessImpl( services.getConnectionProvider() )
		);
		Connection proxiedConnection = ProxyBuilder.buildConnection( logicalConnection );
		JournalingConnectionObserver observer = new JournalingConnectionObserver();
		logicalConnection.addObserver( observer );

		try {
			PreparedStatement ps = proxiedConnection.prepareStatement( "insert into SANDBOX_JDBC_TST( ID, NAME ) values ( ?, ? )" );
			ps.setLong( 1, 1 );
			ps.setString( 2, "name" );
			ps.execute();
			assertTrue( logicalConnection.getResourceRegistry().hasRegisteredResources() );
			assertEquals( 1, observer.getPhysicalConnectionObtainedCount() );
			assertEquals( 0, observer.getPhysicalConnectionReleasedCount() );
			ps.close();
			assertFalse( logicalConnection.getResourceRegistry().hasRegisteredResources() );
			assertEquals( 1, observer.getPhysicalConnectionObtainedCount() );
			assertEquals( 1, observer.getPhysicalConnectionReleasedCount() );
		}
		catch ( SQLException sqle ) {
			fail( "incorrect exception type : sqlexception" );
		}
		finally {
			logicalConnection.close();
		}

		assertFalse( logicalConnection.getResourceRegistry().hasRegisteredResources() );
	}

	@Test
	public void testReleaseCircumventedByHeldResources() {
		LogicalConnectionImpl logicalConnection = new LogicalConnectionImpl(
				null,
				ConnectionReleaseMode.AFTER_STATEMENT,
				services,
				new JdbcConnectionAccessImpl( services.getConnectionProvider() )
		);
		Connection proxiedConnection = ProxyBuilder.buildConnection( logicalConnection );
		JournalingConnectionObserver observer = new JournalingConnectionObserver();
		logicalConnection.addObserver( observer );

		try {
			PreparedStatement ps = proxiedConnection.prepareStatement( "insert into SANDBOX_JDBC_TST( ID, NAME ) values ( ?, ? )" );
			ps.setLong( 1, 1 );
			ps.setString( 2, "name" );
			ps.execute();
			assertTrue( logicalConnection.getResourceRegistry().hasRegisteredResources() );
			assertEquals( 1, observer.getPhysicalConnectionObtainedCount() );
			assertEquals( 0, observer.getPhysicalConnectionReleasedCount() );
			ps.close();
			assertFalse( logicalConnection.getResourceRegistry().hasRegisteredResources() );
			assertEquals( 1, observer.getPhysicalConnectionObtainedCount() );
			assertEquals( 1, observer.getPhysicalConnectionReleasedCount() );

			// open a result set and hold it open...
			ps = proxiedConnection.prepareStatement( "select * from SANDBOX_JDBC_TST" );
			ps.executeQuery();
			assertTrue( logicalConnection.getResourceRegistry().hasRegisteredResources() );
			assertEquals( 2, observer.getPhysicalConnectionObtainedCount() );
			assertEquals( 1, observer.getPhysicalConnectionReleasedCount() );

			// open a second result set
			PreparedStatement ps2 = proxiedConnection.prepareStatement( "select * from SANDBOX_JDBC_TST" );
			ps2.execute();
			assertTrue( logicalConnection.getResourceRegistry().hasRegisteredResources() );
			assertEquals( 2, observer.getPhysicalConnectionObtainedCount() );
			assertEquals( 1, observer.getPhysicalConnectionReleasedCount() );
			// and close it...
			ps2.close();
			// the release should be circumvented...
			assertTrue( logicalConnection.getResourceRegistry().hasRegisteredResources() );
			assertEquals( 2, observer.getPhysicalConnectionObtainedCount() );
			assertEquals( 1, observer.getPhysicalConnectionReleasedCount() );

			// let the close of the logical connection below release all resources (hopefully)...
		}
		catch ( SQLException sqle ) {
			fail( "incorrect exception type : sqlexception" );
		}
		finally {
			logicalConnection.close();
		}

		assertFalse( logicalConnection.getResourceRegistry().hasRegisteredResources() );
		assertEquals( 2, observer.getPhysicalConnectionObtainedCount() );
		assertEquals( 2, observer.getPhysicalConnectionReleasedCount() );
	}

	@Test
	public void testReleaseCircumventedManually() {
		LogicalConnectionImpl logicalConnection = new LogicalConnectionImpl(
				null,
				ConnectionReleaseMode.AFTER_STATEMENT,
				services,
				new JdbcConnectionAccessImpl( services.getConnectionProvider() ) 
		);
		Connection proxiedConnection = ProxyBuilder.buildConnection( logicalConnection );
		JournalingConnectionObserver observer = new JournalingConnectionObserver();
		logicalConnection.addObserver( observer );

		try {
			PreparedStatement ps = proxiedConnection.prepareStatement( "insert into SANDBOX_JDBC_TST( ID, NAME ) values ( ?, ? )" );
			ps.setLong( 1, 1 );
			ps.setString( 2, "name" );
			ps.execute();
			assertTrue( logicalConnection.getResourceRegistry().hasRegisteredResources() );
			assertEquals( 1, observer.getPhysicalConnectionObtainedCount() );
			assertEquals( 0, observer.getPhysicalConnectionReleasedCount() );
			ps.close();
			assertFalse( logicalConnection.getResourceRegistry().hasRegisteredResources() );
			assertEquals( 1, observer.getPhysicalConnectionObtainedCount() );
			assertEquals( 1, observer.getPhysicalConnectionReleasedCount() );

			// disable releases...
			logicalConnection.disableReleases();

			// open a result set...
			ps = proxiedConnection.prepareStatement( "select * from SANDBOX_JDBC_TST" );
			ps.executeQuery();
			assertTrue( logicalConnection.getResourceRegistry().hasRegisteredResources() );
			assertEquals( 2, observer.getPhysicalConnectionObtainedCount() );
			assertEquals( 1, observer.getPhysicalConnectionReleasedCount() );
			// and close it...
			ps.close();
			// the release should be circumvented...
			assertFalse( logicalConnection.getResourceRegistry().hasRegisteredResources() );
			assertEquals( 2, observer.getPhysicalConnectionObtainedCount() );
			assertEquals( 1, observer.getPhysicalConnectionReleasedCount() );

			// let the close of the logical connection below release all resources (hopefully)...
		}
		catch ( SQLException sqle ) {
			fail( "incorrect exception type : sqlexception" );
		}
		finally {
			logicalConnection.close();
		}

		assertFalse( logicalConnection.getResourceRegistry().hasRegisteredResources() );
		assertEquals( 2, observer.getPhysicalConnectionObtainedCount() );
		assertEquals( 2, observer.getPhysicalConnectionReleasedCount() );
	}
}

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