com.atomikos.datasource.xa.jms.JmsTransactionalResource Maven / Gradle / Ivy
/**
* Copyright (C) 2000-2020 Atomikos
*
* LICENSE CONDITIONS
*
* See http://www.atomikos.com/Main/WhichLicenseApplies for details.
*/
package com.atomikos.datasource.xa.jms;
import javax.jms.JMSException;
import javax.jms.XAConnection;
import javax.jms.XAConnectionFactory;
import javax.jms.XASession;
import javax.transaction.xa.XAResource;
import com.atomikos.datasource.ResourceException;
import com.atomikos.datasource.xa.XATransactionalResource;
/**
*
* resource implementation for JMS queues.
*
*
*/
public class JmsTransactionalResource extends XATransactionalResource
{
private XAConnectionFactory factory;
private XAConnection conn;
/**
* Create a new instance.
*
* @param name
* The unique resource name.
* @param factory
* The xa connection factory to use.
*/
public JmsTransactionalResource ( String name , XAConnectionFactory factory )
{
super ( name );
this.factory = factory;
this.conn = null;
}
/**
* Implements the functionality to get an XAResource handle.
*
* @return XAResource The XAResource instance.
*/
@Override
protected synchronized XAResource refreshXAConnection ()
throws ResourceException
{
XAResource res = null;
if ( this.conn != null ) {
try {
this.conn.close ();
} catch ( Exception err ) {
// happens if connection has timed out
// which is probably normal, otherwise
// refresh would not be called in the first place
}
}
try {
this.conn = this.factory.createXAConnection ();
XASession session = this.conn.createXASession ();
// note: session does not have to be kept in attribute,
// since JMS explicitly states that closing the connection
// also closes all sessions.
res = session.getXAResource ();
} catch ( JMSException jms ) {
throw new ResourceException ( "Error in getting XA resource",
jms );
}
return res;
}
/**
* Overrides default close to include closing any open connections to the
* JMS infrastructure.
*/
@Override
public void close () throws ResourceException
{
super.close ();
try {
if ( this.conn != null ) this.conn.close ();
} catch ( JMSException err ) {
throw new ResourceException ( err.getMessage () );
}
}
}