/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ejb.plugins.cmp.jdbc.keygen;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.ejb.EJBException;
import org.jboss.deployment.DeploymentException;
import org.jboss.ejb.EntityEnterpriseContext;
import org.jboss.ejb.plugins.cmp.jdbc.JDBCIdentityColumnCreateCommand;
import org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager;
import org.jboss.ejb.plugins.cmp.jdbc.JDBCUtil;
import org.jboss.ejb.plugins.cmp.jdbc.SQLUtil;
import org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCEntityCommandMetaData;
/**
* Create command for PostgreSQL that fetches the currval of the sequence
* associated with a SERIAL column in this table.
*
* @author <a href="mailto:jeremy@boynes.com">Jeremy Boynes</a>
* @version $Revision: 81030 $
*/
public class JDBCPostgreSQLCreateCommand extends JDBCIdentityColumnCreateCommand
{
private String sequence;
private String sequenceSQL;
public void init(JDBCStoreManager manager) throws DeploymentException
{
super.init(manager);
}
protected void initEntityCommand(JDBCEntityCommandMetaData entityCommand) throws DeploymentException
{
super.initEntityCommand(entityCommand);
sequence = entityCommand.getAttribute("sequence");
if (sequence == null) {
sequence = entity.getQualifiedTableName()
+ '_' + SQLUtil.getColumnNamesClause(pkField, new StringBuffer(20))
+ "_seq";
}
sequenceSQL = "SELECT currval('"+sequence+"')";
if (debug) {
log.debug("SEQUENCE SQL is :"+sequenceSQL);
}
}
protected int executeInsert(int index, PreparedStatement ps, EntityEnterpriseContext ctx) throws SQLException
{
int rows = ps.executeUpdate();
Statement s = null;
ResultSet rs = null;
try {
if (trace) {
log.trace("Executing SQL :"+sequenceSQL);
}
Connection c = ps.getConnection();
s = c.createStatement();
rs = s.executeQuery(sequenceSQL);
if (!rs.next()) {
throw new EJBException("sequence sql returned an empty ResultSet");
}
pkField.loadInstanceResults(rs, 1, ctx);
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
// throw EJBException to force a rollback as the row has been inserted
throw new EJBException("Error extracting generated keys", e);
} finally {
JDBCUtil.safeClose(rs);
JDBCUtil.safeClose(s);
}
return rows;
}
}