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Hibernate example source code file (GeneralWorkTest.java)

This example Hibernate source code file (GeneralWorkTest.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

jdbc, override, person, resultset, session, sql, sqlexception, sqlexception, statement, statement, string, string, test, test, throwable, work

The Hibernate GeneralWorkTest.java source code

/*
 * 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
		}
	}
}

Other Hibernate examples (source code examples)

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