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/* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.qpid.client;
import org.apache.qpid.client.message.MessageFactoryRegistry;
import javax.jms.*;
import javax.transaction.xa.XAResource;
/**
* This is an implementation of the javax.njms.XASEssion interface.
*/
public class XASessionImpl extends AMQSession_0_10 implements XASession, XATopicSession, XAQueueSession
{
/**
* XAResource associated with this XASession
*/
private final XAResourceImpl _xaResource;
/**
* This XASession Qpid DtxSession
*/
private org.apache.qpid.transport.Session _qpidDtxSession;
/**
* The standard session
*/
private Session _jmsSession;
//-- Constructors
/**
* Create a JMS XASession
*/
public XASessionImpl(org.apache.qpid.transport.Connection qpidConnection, AMQConnection con, int channelId,
int defaultPrefetchHigh, int defaultPrefetchLow)
{
super(qpidConnection, con, channelId, false, // this is not a transacted session
Session.AUTO_ACKNOWLEDGE, // the ack mode is transacted
MessageFactoryRegistry.newDefaultRegistry(), defaultPrefetchHigh, defaultPrefetchLow);
createSession();
_xaResource = new XAResourceImpl(this);
}
//-- public methods
/**
* Create a qpid session.
*/
public void createSession()
{
_qpidDtxSession = _qpidConnection.createSession(0);
_qpidDtxSession.setSessionListener(this);
_qpidDtxSession.dtxSelect();
}
//--- javax.njms.XASEssion API
/**
* Gets the session associated with this XASession.
*
* @return The session object.
* @throws JMSException if an internal error occurs.
*/
public Session getSession() throws JMSException
{
if (_jmsSession == null)
{
_jmsSession = getAMQConnection().createSession(true, getAcknowledgeMode());
}
return _jmsSession;
}
/**
* Returns an XA resource.
*
* @return An XA resource.
*/
public XAResource getXAResource()
{
return _xaResource;
}
//-- overwritten mehtods
/**
* Throws a {@link TransactionInProgressException}, since it should
* not be called for an XASession object.
*
* @throws TransactionInProgressException always.
*/
public void commit() throws JMSException
{
throw new TransactionInProgressException(
"XASession: A direct invocation of the commit operation is probibited!");
}
/**
* Throws a {@link TransactionInProgressException}, since it should
* not be called for an XASession object.
*
* @throws TransactionInProgressException always.
*/
public void rollback() throws JMSException
{
throw new TransactionInProgressException(
"XASession: A direct invocation of the rollback operation is probibited!");
}
/**
* Access to the underlying Qpid Session
*
* @return The associated Qpid Session.
*/
protected org.apache.qpid.transport.Session getQpidSession()
{
return _qpidDtxSession;
}
//--- interface XAQueueSession
/**
* Gets the topic session associated with this <CODE>XATopicSession</CODE>.
*
* @return the topic session object
* @throws JMSException If an internal error occurs.
*/
public QueueSession getQueueSession() throws JMSException
{
return (QueueSession) getSession();
}
//--- interface XATopicSession
/**
* Gets the topic session associated with this <CODE>XATopicSession</CODE>.
*
* @return the topic session object
* @throws JMSException If an internal error occurs.
*/
public TopicSession getTopicSession() throws JMSException
{
return (TopicSession) getSession();
}
}
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