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ActiveMQ example source code file (ActiveMQXASession.java)

This example ActiveMQ source code file (ActiveMQXASession.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

activemqxasession, cannot, cannot, jmsexception, jmsexception, queuesession, queuesession, session, topicsession, transactioninprogressexception, transactioninprogressexception, xaqueuesession, xaresource, xasession

The ActiveMQ ActiveMQXASession.java source code

/**
 * 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.activemq;

import javax.jms.JMSException;
import javax.jms.QueueSession;
import javax.jms.Session;
import javax.jms.TopicSession;
import javax.jms.TransactionInProgressException;
import javax.jms.XAQueueSession;
import javax.jms.XATopicSession;
import javax.transaction.xa.XAResource;

import org.apache.activemq.command.SessionId;

/**
 * The XASession interface extends the capability of Session by adding access
 * to a JMS provider's support for the  Java Transaction API (JTA) (optional).
 * This support takes the form of a javax.transaction.xa.XAResource object.
 * The functionality of this object closely resembles that defined by the
 * standard X/Open XA Resource interface.
 * <p/>
 * An application server controls the transactional assignment of an XASession
 * by obtaining its XAResource. It uses the XAResource to assign the session
 * to a transaction, prepare and commit work on the transaction, and so on.
 * <p/>
 * An XAResource provides some fairly sophisticated facilities for
 * interleaving work on multiple transactions, recovering a list of
 * transactions in progress, and so on. A JTA aware JMS provider must fully
 * implement this functionality. This could be done by using the services of a
 * database that supports XA, or a JMS provider may choose to implement this
 * functionality from scratch.
 * <p/>
 * A client of the application server is given what it thinks is a regular
 * JMS Session. Behind the scenes, the application server controls the
 * transaction management of the underlying XASession.
 * <p/>
 * The XASession interface is optional. JMS providers are not required to
 * support this interface. This interface is for use by JMS providers to
 * support transactional environments. Client programs are strongly encouraged
 * to use the transactional support  available in their environment, rather
 * than use these XA  interfaces directly.
 *
 * 
 * @see javax.jms.Session
 * @see javax.jms.QueueSession
 * @see javax.jms.TopicSession
 * @see javax.jms.XASession
 */
public class ActiveMQXASession extends ActiveMQSession implements QueueSession, TopicSession, XAQueueSession, XATopicSession {

    public ActiveMQXASession(ActiveMQXAConnection connection, SessionId sessionId, int theAcknowlegeMode, boolean dispatchAsync) throws JMSException {
        super(connection, sessionId, theAcknowlegeMode, dispatchAsync);
    }

    public boolean getTransacted() throws JMSException {
        return getTransactionContext().isInXATransaction();
    }

    public void rollback() throws JMSException {
        throw new TransactionInProgressException("Cannot rollback() inside an XASession");
    }

    public void commit() throws JMSException {
        throw new TransactionInProgressException("Cannot commit() inside an XASession");
    }

    public Session getSession() throws JMSException {
        return this;
    }

    public XAResource getXAResource() {
        return getTransactionContext();
    }

    public QueueSession getQueueSession() throws JMSException {
        return new ActiveMQQueueSession(this);
    }

    public TopicSession getTopicSession() throws JMSException {
        return new ActiveMQTopicSession(this);
    }

    /*
     * when there is no XA transaction it is auto ack
     */
    public boolean isAutoAcknowledge() {
      return true;
    }
    
    protected void doStartTransaction() throws JMSException {
        // allow non transactional auto ack work on an XASession
        // Seems ok by the spec that an XAConnection can be used without an XA tx
    }

}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ ActiveMQXASession.java source code file:

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