//$Id: BatchTest.java 10977 2006-12-12 23:28:04Z steve.ebersole@jboss.com $
package org.hibernate.test.batch;
import java.math.BigDecimal;
import junit.framework.Test;
import org.hibernate.CacheMode;
import org.hibernate.ScrollMode;
import org.hibernate.ScrollableResults;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.testing.junit.functional.FunctionalTestCase;
import org.hibernate.testing.junit.functional.FunctionalTestClassTestSuite;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
/**
* This is how to do batch processing in Hibernate.
* Remember to enable JDBC batch updates, or this
* test will take a Very Long Time!
*
* @author Gavin King
*/
public class BatchTest extends FunctionalTestCase {
public BatchTest(String str) {
super( str );
}
public String[] getMappings() {
return new String[] { "batch/DataPoint.hbm.xml" };
}
public String getCacheConcurrencyStrategy() {
return null;
}
public void configure(Configuration cfg) {
cfg.setProperty( Environment.STATEMENT_BATCH_SIZE, "20" );
}
public static Test suite() {
return new FunctionalTestClassTestSuite( BatchTest.class );
}
public void testBatchInsertUpdate() {
long start = System.currentTimeMillis();
final int N = 5000; //26 secs with batch flush, 26 without
//final int N = 100000; //53 secs with batch flush, OOME without
//final int N = 250000; //137 secs with batch flush, OOME without
Session s = openSession();
s.setCacheMode( CacheMode.IGNORE );
Transaction t = s.beginTransaction();
for ( int i = 0; i < N; i++ ) {
DataPoint dp = new DataPoint();
dp.setX( new BigDecimal( i * 0.1d ).setScale( 19, BigDecimal.ROUND_DOWN ) );
dp.setY( new BigDecimal( Math.cos( dp.getX().doubleValue() ) ).setScale( 19, BigDecimal.ROUND_DOWN ) );
s.save( dp );
if ( i % 20 == 0 ) {
s.flush();
s.clear();
}
}
t.commit();
s.close();
s = openSession();
s.setCacheMode( CacheMode.IGNORE );
t = s.beginTransaction();
int i = 0;
ScrollableResults sr = s.createQuery( "from DataPoint dp order by dp.x asc" )
.scroll( ScrollMode.FORWARD_ONLY );
while ( sr.next() ) {
DataPoint dp = ( DataPoint ) sr.get( 0 );
dp.setDescription( "done!" );
if ( ++i % 20 == 0 ) {
s.flush();
s.clear();
}
}
t.commit();
s.close();
System.out.println( System.currentTimeMillis() - start );
}
}