GeneralWorkTest.java

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2007-2011, 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.jdbc;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import org.hibernate.JDBCException;
import org.hibernate.Session;
import org.hibernate.jdbc.ReturningWork;
import org.hibernate.jdbc.Work;

import org.junit.Test;

import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;

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

/**
 * GeneralWorkTest implementation
 *
 * @author Steve Ebersole
 */
public class GeneralWorkTest extends BaseCoreFunctionalTestCase {
	@Override
	public String getBaseForMappings() {
		return "org/hibernate/test/jdbc/";
	}

	@Override
	public String[] getMappings() {
		return new String[] { "Mappings.hbm.xml" };
	}

	@Test
	public void testGeneralUsage() throws Throwable {
		Session session = openSession();
		session.beginTransaction();
		session.doWork(
				new Work() {
					public void execute(Connection connection) throws SQLException {
						// in this current form, users must handle try/catches themselves for proper resource release
						Statement statement = null;
						try {
							statement = connection.createStatement();
							ResultSet resultSet = null;
							try {
								resultSet = statement.executeQuery( "select * from T_JDBC_PERSON" );
							}
							finally {
								releaseQuietly( resultSet );
							}
							try {
								resultSet = statement.executeQuery( "select * from T_JDBC_BOAT" );
							}
							finally {
								releaseQuietly( resultSet );
							}
						}
						finally {
							releaseQuietly( statement );
						}
					}
				}
		);
		session.getTransaction().commit();
		session.close();
	}

	@Test
	public void testSQLExceptionThrowing() {
		Session session = openSession();
		session.beginTransaction();
		try {
			session.doWork(
					new Work() {
						public void execute(Connection connection) throws SQLException {
							Statement statement = null;
							try {
								statement = connection.createStatement();
								statement.executeQuery( "select * from non_existent" );
							}
							finally {
								releaseQuietly( statement );
							}
						}
					}
			);
			fail( "expecting exception" );
		}
		catch ( JDBCException expected ) {
			// expected outcome
		}
		session.getTransaction().commit();
		session.close();
	}

	@Test
	public void testGeneralReturningUsage() throws Throwable {
		Session session = openSession();
		session.beginTransaction();
		Person p = new Person( "Abe", "Lincoln" );
		session.save( p );
		session.getTransaction().commit();

		session = openSession();
		session.beginTransaction();
		long count = session.doReturningWork(
				new ReturningWork<Long>() {
					public Long execute(Connection connection) throws SQLException {
						// in this current form, users must handle try/catches themselves for proper resource release
						Statement statement = null;
						long personCount = 0;
						try {
							statement = connection.createStatement();
							ResultSet resultSet = null;
							try {
								resultSet = statement.executeQuery( "select count(*) from T_JDBC_PERSON" );
								resultSet.next();
								personCount = resultSet.getLong( 1 );
								assertEquals( 1L, personCount );
							}
							finally {
								releaseQuietly( resultSet );
							}
						}
						finally {
							releaseQuietly( statement );
						}
						return personCount;
					}
				}
		);
		session.getTransaction().commit();
		session.close();
		assertEquals( 1L, count );

		session = openSession();
		session.beginTransaction();
		session.delete( p );
		session.getTransaction().commit();
		session.close();
	}

	private void releaseQuietly(Statement statement) {
		if ( statement == null ) {
			return;
		}
		try {
			statement.close();
		}
		catch ( SQLException e ) {
			// ignore
		}
	}

	private void releaseQuietly(ResultSet resultSet) {
		if ( resultSet == null ) {
			return;
		}
		try {
			resultSet.close();
		}
		catch ( SQLException e ) {
			// ignore
		}
	}
}