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Hibernate example source code file (OptimizerUnitTest.java)

This example Hibernate source code file (OptimizerUnitTest.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

accesscallback, baseunittestcase, integraldatatypeholder, long, long, optimizer, optimizer, optimizerunittest, sourcemock, sourcemock, suppresswarnings, test, test

The Hibernate OptimizerUnitTest.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.id.enhanced;

import org.hibernate.id.IdentifierGeneratorHelper;
import org.hibernate.id.IntegralDataTypeHolder;

import org.junit.Test;

import org.hibernate.testing.junit4.BaseUnitTestCase;

import static org.junit.Assert.assertEquals;

/**
 * {@inheritDoc}
 *
 * @author Steve Ebersole
 */
@SuppressWarnings({ "deprecation" })
public class OptimizerUnitTest extends BaseUnitTestCase {
	@Test
	public void testBasicNoOptimizerUsage() {
		// test historic sequence behavior, where the initial values start at 1...
		SourceMock sequence = new SourceMock( 1 );
		Optimizer optimizer = OptimizerFactory.buildOptimizer( OptimizerFactory.NONE, Long.class, 1 );
		for ( int i = 1; i < 11; i++ ) {
			final Long next = ( Long ) optimizer.generate( sequence );
			assertEquals( i, next.intValue() );
		}
		assertEquals( 10, sequence.getTimesCalled() );
		assertEquals( 10, sequence.getCurrentValue() );

		// test historic table behavior, where the initial values started at 0 (we now force 1 to be the first used id value)
		sequence = new SourceMock( 0 );
		optimizer = OptimizerFactory.buildOptimizer( OptimizerFactory.NONE, Long.class, 1 );
		for ( int i = 1; i < 11; i++ ) {
			final Long next = ( Long ) optimizer.generate( sequence );
			assertEquals( i, next.intValue() );
		}
		assertEquals( 11, sequence.getTimesCalled() ); // an extra time to get to 1 initially
		assertEquals( 10, sequence.getCurrentValue() );
	}

	@Test
	public void testBasicHiLoOptimizerUsage() {
		int increment = 10;
		Long next;

		// test historic sequence behavior, where the initial values start at 1...
		SourceMock sequence = new SourceMock( 1 );
		Optimizer optimizer = OptimizerFactory.buildOptimizer( OptimizerFactory.HILO, Long.class, increment );
		for ( int i = 1; i <= increment; i++ ) {
			next = ( Long ) optimizer.generate( sequence );
			assertEquals( i, next.intValue() );
		}
		assertEquals( 1, sequence.getTimesCalled() ); // once to initialze state
		assertEquals( 1, sequence.getCurrentValue() );
		// force a "clock over"
		next = ( Long ) optimizer.generate( sequence );
		assertEquals( 11, next.intValue() );
		assertEquals( 2, sequence.getTimesCalled() );
		assertEquals( 2, sequence.getCurrentValue() );

		// test historic table behavior, where the initial values started at 0 (we now force 1 to be the first used id value)
		sequence = new SourceMock( 0 );
		optimizer = OptimizerFactory.buildOptimizer( OptimizerFactory.HILO, Long.class, increment );
		for ( int i = 1; i <= increment; i++ ) {
			next = ( Long ) optimizer.generate( sequence );
			assertEquals( i, next.intValue() );
		}
		assertEquals( 2, sequence.getTimesCalled() ); // here have have an extra call to get to 1 initially
		assertEquals( 1, sequence.getCurrentValue() );
		// force a "clock over"
		next = ( Long ) optimizer.generate( sequence );
		assertEquals( 11, next.intValue() );
		assertEquals( 3, sequence.getTimesCalled() );
		assertEquals( 2, sequence.getCurrentValue() );
	}

	@Test
	public void testBasicPooledOptimizerUsage() {
		Long next;
		// test historic sequence behavior, where the initial values start at 1...
		SourceMock sequence = new SourceMock( 1, 10 );
		Optimizer optimizer = OptimizerFactory.buildOptimizer( OptimizerFactory.POOL, Long.class, 10 );
		for ( int i = 1; i < 11; i++ ) {
			next = ( Long ) optimizer.generate( sequence );
			assertEquals( i, next.intValue() );
		}
		assertEquals( 2, sequence.getTimesCalled() ); // twice to initialize state
		assertEquals( 11, sequence.getCurrentValue() );
		// force a "clock over"
		next = ( Long ) optimizer.generate( sequence );
		assertEquals( 11, next.intValue() );
		assertEquals( 3, sequence.getTimesCalled() );
		assertEquals( 21, sequence.getCurrentValue() );
	}

	@Test
	public void testSubsequentPooledOptimizerUsage() {
		// test the pooled optimizer in situation where the sequence is already beyond its initial value on init.
		//		cheat by telling the sequence to start with 1000
		final SourceMock sequence = new SourceMock( 1001, 3, 5 );
		//		but tell the optimizer the start-with is 1
		final Optimizer optimizer = OptimizerFactory.buildOptimizer( OptimizerFactory.POOL, Long.class, 3, 1 );

		assertEquals( 5, sequence.getTimesCalled() );
		assertEquals( 1001, sequence.getCurrentValue() );

		Long next = (Long) optimizer.generate( sequence );
		assertEquals( 1001, next.intValue() );
		assertEquals( (5+1), sequence.getTimesCalled() );
		assertEquals( (1001+3), sequence.getCurrentValue() );

		next = (Long) optimizer.generate( sequence );
		assertEquals( (1001+1), next.intValue() );
		assertEquals( (5+1), sequence.getTimesCalled() );
		assertEquals( (1001+3), sequence.getCurrentValue() );

		next = (Long) optimizer.generate( sequence );
		assertEquals( (1001+2), next.intValue() );
		assertEquals( (5+1), sequence.getTimesCalled() );
		assertEquals( (1001+3), sequence.getCurrentValue() );

		// force a "clock over"
		next = (Long) optimizer.generate( sequence );
		assertEquals( (1001+3), next.intValue() );
		assertEquals( (5+2), sequence.getTimesCalled() );
		assertEquals( (1001+6), sequence.getCurrentValue() );
	}

	@Test
	public void testBasicPooledLoOptimizerUsage() {
		final SourceMock sequence = new SourceMock( 1, 3 );
		final Optimizer optimizer = OptimizerFactory.buildOptimizer( OptimizerFactory.POOL_LO, Long.class, 3 );

		assertEquals( 0, sequence.getTimesCalled() );
		assertEquals( -1, sequence.getCurrentValue() );

		Long next = ( Long ) optimizer.generate( sequence );
		assertEquals( 1, next.intValue() );
		assertEquals( 1, sequence.getTimesCalled() );
		assertEquals( 1, sequence.getCurrentValue() );

		next = ( Long ) optimizer.generate( sequence );
		assertEquals( 2, next.intValue() );
		assertEquals( 1, sequence.getTimesCalled() );
		assertEquals( 1, sequence.getCurrentValue() );

		next = ( Long ) optimizer.generate( sequence );
		assertEquals( 3, next.intValue() );
		assertEquals( 1, sequence.getTimesCalled() );
		assertEquals( 1, sequence.getCurrentValue() );

//		// force a "clock over"
		next = ( Long ) optimizer.generate( sequence );
		assertEquals( 4, next.intValue() );
		assertEquals( 2, sequence.getTimesCalled() );
		assertEquals( (1+3), sequence.getCurrentValue() );
	}

	@Test
	public void testSubsequentPooledLoOptimizerUsage() {
		// test the pooled optimizer in situation where the sequence is already beyond its initial value on init.
		//		cheat by telling the sequence to start with 1000
		final SourceMock sequence = new SourceMock( 1001, 3, 5 );
		//		but tell the optimizer the start-with is 1
		final Optimizer optimizer = OptimizerFactory.buildOptimizer( OptimizerFactory.POOL, Long.class, 3, 1 );

		assertEquals( 5, sequence.getTimesCalled() );
		assertEquals( 1001, sequence.getCurrentValue() );

		Long next = ( Long ) optimizer.generate( sequence );
		assertEquals( (1001), next.intValue() );
		assertEquals( (5+1), sequence.getTimesCalled() );
		assertEquals( (1001+3), sequence.getCurrentValue() );

		next = ( Long ) optimizer.generate( sequence );
		assertEquals( (1001+1), next.intValue() );
		assertEquals( (5+1), sequence.getTimesCalled() );
		assertEquals( (1001+3), sequence.getCurrentValue() );

		next = ( Long ) optimizer.generate( sequence );
		assertEquals( (1001+2), next.intValue() );
		assertEquals( (5+1), sequence.getTimesCalled() );
		assertEquals( (1001+3), sequence.getCurrentValue() );

//		// force a "clock over"
		next = ( Long ) optimizer.generate( sequence );
		assertEquals( (1001+3), next.intValue() );
		assertEquals( (5+2), sequence.getTimesCalled() );
		assertEquals( (1001+6), sequence.getCurrentValue() );
	}

	@Test
	public void testRecoveredPooledOptimizerUsage() {
		final SourceMock sequence = new SourceMock( 1, 3 );
		final Optimizer optimizer = OptimizerFactory.buildOptimizer( OptimizerFactory.POOL, Long.class, 3, 1 );

		assertEquals( 0, sequence.getTimesCalled() );
		assertEquals( -1, sequence.getCurrentValue() );

		Long next = ( Long ) optimizer.generate( sequence );
		assertEquals( 1, next.intValue() );
		assertEquals( 2, sequence.getTimesCalled() );
		assertEquals( 4, sequence.getCurrentValue() );

		// app ends, and starts back up (we should "lose" only 2 and 3 as id values)
		final Optimizer optimizer2 = OptimizerFactory.buildOptimizer( OptimizerFactory.POOL, Long.class, 3, 1 );
		next = ( Long ) optimizer2.generate( sequence );
		assertEquals( 4, next.intValue() );
		assertEquals( 3, sequence.getTimesCalled() );
		assertEquals( 7, sequence.getCurrentValue() );
	}

	@Test
	public void testRecoveredPooledLoOptimizerUsage() {
		final SourceMock sequence = new SourceMock( 1, 3 );
		final Optimizer optimizer = OptimizerFactory.buildOptimizer( OptimizerFactory.POOL_LO, Long.class, 3, 1 );

		assertEquals( 0, sequence.getTimesCalled() );
		assertEquals( -1, sequence.getCurrentValue() );

		Long next = ( Long ) optimizer.generate( sequence );
		assertEquals( 1, next.intValue() );
		assertEquals( 1, sequence.getTimesCalled() );
		assertEquals( 1, sequence.getCurrentValue() );

		// app ends, and starts back up (we should "lose" only 2 and 3 as id values)
		final Optimizer optimizer2 = OptimizerFactory.buildOptimizer( OptimizerFactory.POOL_LO, Long.class, 3, 1 );
		next = ( Long ) optimizer2.generate( sequence );
		assertEquals( 4, next.intValue() );
		assertEquals( 2, sequence.getTimesCalled() );
		assertEquals( 4, sequence.getCurrentValue() );
	}

	private static class SourceMock implements AccessCallback {
		private IdentifierGeneratorHelper.BasicHolder value = new IdentifierGeneratorHelper.BasicHolder( Long.class );
		private long initialValue;
		private int increment;
		private int timesCalled = 0;

		public SourceMock(long initialValue) {
			this( initialValue, 1 );
		}

		public SourceMock(long initialValue, int increment) {
			this( initialValue, increment, 0 );
		}

		public SourceMock(long initialValue, int increment, int timesCalled) {
			this.increment = increment;
			this.timesCalled = timesCalled;
			if ( timesCalled != 0 ) {
				this.value.initialize( initialValue );
				this.initialValue = 1;
			}
			else {
				this.value.initialize( -1 );
				this.initialValue = initialValue;
			}
		}

		public IntegralDataTypeHolder getNextValue() {
			try {
				if ( timesCalled == 0 ) {
					initValue();
					return value.copy();
				}
				else {
					return value.add( increment ).copy();
				}
			}
			finally {
				timesCalled++;
			}
		}

		private void initValue() {
			this.value.initialize( initialValue );
		}

		public int getTimesCalled() {
			return timesCalled;
		}

		public long getCurrentValue() {
			return value == null ? -1 : value.getActualLongValue();
		}
	}

}

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