/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, 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.resource.adapter.jdbc.vendor;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.sql.Connection;
import java.sql.SQLException;
import org.jboss.logging.Logger;
import org.jboss.resource.adapter.jdbc.ValidConnectionChecker;
import org.jboss.util.NestedRuntimeException;
/**
* Implements check valid connection sql
*
* @author <a href="mailto:adrian@jboss.org">Adrian Brock</a>
* @version $Revision: 105425 $
*/
public class OracleValidConnectionChecker
implements ValidConnectionChecker, Serializable
{
private static final long serialVersionUID = 5379340663276548636L;
private static transient Logger log;
// The timeout in seconds (apparently the timeout is ignored?)
private static Object[] params = new Object[] { new Integer(5) };
private transient Method ping;
public OracleValidConnectionChecker()
{
try
{
initPing();
}
catch (Exception e)
{
throw new NestedRuntimeException("Unable to resolve pingDatabase method:", e);
}
}
public SQLException isValidConnection(Connection c)
{
try
{
Integer status = (Integer) ping.invoke(c, params);
// Error
if (status == null || status.intValue() < 0)
return new SQLException("pingDatabase failed status=" + status);
}
catch (Exception e)
{
// What do we do here? Assume it is a misconfiguration
log.warn("Unexpected error in pingDatabase", e);
}
// OK
return null;
}
private void initPing() throws ClassNotFoundException, NoSuchMethodException
{
log = Logger.getLogger(OracleValidConnectionChecker.class);
Class oracleConnection = Thread.currentThread().getContextClassLoader().loadClass("oracle.jdbc.driver.OracleConnection");
ping = oracleConnection.getMethod("pingDatabase", new Class[] { Integer.TYPE });
}
private void writeObject(ObjectOutputStream stream) throws IOException
{
// nothing
}
private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException
{
try
{
initPing();
}
catch (Exception e)
{
IOException ioe = new IOException("Unable to resolve pingDatabase method: " + e.getMessage());
ioe.initCause(e);
throw ioe;
}
}
}