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Hibernate example source code file (InsertOrderingTest.java)

This example Hibernate source code file (InsertOrderingTest.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

arraylist, batchingbatch, counter, counter, group, iterator, jdbc, jdbccoordinator, override, override, sql, statsbatch, string, string, user, user, util

The Hibernate InsertOrderingTest.java source code

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

import java.sql.PreparedStatement;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.engine.jdbc.batch.internal.BatchBuilderImpl;
import org.hibernate.engine.jdbc.batch.internal.BatchBuilderInitiator;
import org.hibernate.engine.jdbc.batch.internal.BatchingBatch;
import org.hibernate.engine.jdbc.batch.spi.Batch;
import org.hibernate.engine.jdbc.batch.spi.BatchKey;
import org.hibernate.engine.jdbc.spi.JdbcCoordinator;

import org.junit.Test;

import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;

import static org.junit.Assert.assertEquals;

/**
 * @author Steve Ebersole
 */
public class InsertOrderingTest extends BaseCoreFunctionalTestCase {
	@Override
	public String[] getMappings() {
		return new String[] { "insertordering/Mapping.hbm.xml" };
	}

	@Override
	public void configure(Configuration cfg) {
		super.configure( cfg );
		cfg.setProperty( Environment.ORDER_INSERTS, "true" );
		cfg.setProperty( Environment.STATEMENT_BATCH_SIZE, "10" );
		cfg.setProperty( BatchBuilderInitiator.BUILDER, StatsBatchBuilder.class.getName() );
	}

	@Test
	public void testBatchOrdering() {
		Session s = openSession();
		s.beginTransaction();
		int iterations = 12;
		for ( int i = 0; i < iterations; i++ ) {
			User user = new User( "user-" + i );
			Group group = new Group( "group-" + i );
			s.save( user );
			s.save( group );
			user.addMembership( group );
		}
		StatsBatch.reset();
		s.getTransaction().commit();
		s.close();

		assertEquals( 3, StatsBatch.batchSizes.size() );

		s = openSession();
		s.beginTransaction();
		Iterator users = s.createQuery( "from User u left join fetch u.memberships m left join fetch m.group" ).list().iterator();
		while ( users.hasNext() ) {
			s.delete( users.next() );
		}
		s.getTransaction().commit();
		s.close();
	}

	public static class Counter {
		public int count = 0;
	}

	public static class StatsBatch extends BatchingBatch {
		private static String batchSQL;
		private static List batchSizes = new ArrayList();
		private static int currentBatch = -1;

		public StatsBatch(BatchKey key, JdbcCoordinator jdbcCoordinator, int jdbcBatchSize) {
			super( key, jdbcCoordinator, jdbcBatchSize );
		}

		static void reset() {
			batchSizes = new ArrayList();
			currentBatch = -1;
			batchSQL = null;
		}

		@Override
		public PreparedStatement getBatchStatement(String sql, boolean callable) {
			if ( batchSQL == null || ! batchSQL.equals( sql ) ) {
				currentBatch++;
				batchSQL = sql;
				batchSizes.add( currentBatch, new Counter() );
			}
			return super.getBatchStatement( sql, callable );
		}

		@Override
		public void addToBatch() {
			Counter counter = ( Counter ) batchSizes.get( currentBatch );
			counter.count++;
			super.addToBatch();
		}
	}

	public static class StatsBatchBuilder extends BatchBuilderImpl {
		private int jdbcBatchSize;

		@Override
        public void setJdbcBatchSize(int jdbcBatchSize) {
			this.jdbcBatchSize = jdbcBatchSize;
		}

		@Override
		public Batch buildBatch(BatchKey key, JdbcCoordinator jdbcCoordinator) {
			return new StatsBatch( key, jdbcCoordinator, jdbcBatchSize );
		}
	}
}

Other Hibernate examples (source code examples)

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