/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
*
* 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.jdbc;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import org.hibernate.HibernateException;
import org.hibernate.Interceptor;
/**
* An implementation of the <tt>Batcher</tt> interface that
* actually uses batching
* @author Gavin King
*/
public class BatchingBatcher extends AbstractBatcher {
private int batchSize;
private Expectation[] expectations;
public BatchingBatcher(ConnectionManager connectionManager, Interceptor interceptor) {
super( connectionManager, interceptor );
expectations = new Expectation[ getFactory().getSettings().getJdbcBatchSize() ];
}
public void addToBatch(Expectation expectation) throws SQLException, HibernateException {
if ( !expectation.canBeBatched() ) {
throw new HibernateException( "attempting to batch an operation which cannot be batched" );
}
PreparedStatement batchUpdate = getStatement();
batchUpdate.addBatch();
expectations[ batchSize++ ] = expectation;
if ( batchSize == getFactory().getSettings().getJdbcBatchSize() ) {
doExecuteBatch( batchUpdate );
}
}
protected void doExecuteBatch(PreparedStatement ps) throws SQLException, HibernateException {
if ( batchSize == 0 ) {
log.debug( "no batched statements to execute" );
}
else {
if ( log.isDebugEnabled() ) {
log.debug( "Executing batch size: " + batchSize );
}
try {
checkRowCounts( ps.executeBatch(), ps );
}
catch (RuntimeException re) {
log.error( "Exception executing batch: ", re );
throw re;
}
finally {
batchSize = 0;
}
}
}
private void checkRowCounts(int[] rowCounts, PreparedStatement ps) throws SQLException, HibernateException {
int numberOfRowCounts = rowCounts.length;
if ( numberOfRowCounts != batchSize ) {
log.warn( "JDBC driver did not return the expected number of row counts" );
}
for ( int i = 0; i < numberOfRowCounts; i++ ) {
expectations[i].verifyOutcome( rowCounts[i], ps, i );
}
}
}