JQueueSession.java

/*
 * JOnAS: Java(TM) Open Application Server
 * Copyright (C) 1999 Bull S.A.
 * Contact: jonas-team@objectweb.org
 * 
 * This library 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 any later version.
 * 
 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 *
 * --------------------------------------------------------------------------
 * $Id: JQueueSession.java,v 1.7 2004/03/19 14:31:48 sauthieg Exp $
 * --------------------------------------------------------------------------
 */

package org.objectweb.jonas_jms;

import javax.jms.JMSException;
import javax.jms.Queue;
import javax.jms.QueueBrowser;
import javax.jms.QueueReceiver;
import javax.jms.QueueSender;
import javax.jms.QueueSession;
import javax.jms.Session;
import javax.jms.TemporaryQueue;
import javax.jms.XAQueueConnection;
import javax.jms.XAQueueSession;
import javax.transaction.RollbackException;
import javax.transaction.SystemException;
import javax.transaction.Transaction;

import org.objectweb.util.monolog.api.BasicLevel;

public class JQueueSession extends JSession implements QueueSession {

    // Underlaying Objects
    protected XAQueueConnection xaqc;
    protected QueueSession qs = null;
    protected XAQueueSession xaqs = null;
    
    public JQueueSession(JConnection jconn, XAQueueConnection xaqc) {
        super(jconn);
        this.xaqc = xaqc;
    }

    // -----------------------------------------------------------------------
    // Internal Methods
    // -----------------------------------------------------------------------

    protected Session getMOMSession() throws JMSException {
        return getMOMQueueSession();
    }

    protected QueueSession getMOMQueueSession() throws JMSException {
        Transaction tx = null;
        try {
            tx = tm.getTransaction();
        } catch (SystemException e) {
            TraceJms.logger.log(BasicLevel.ERROR,"cannot get Transaction");
        }
        if (tx == null) {
            if (qs == null) {
                qs = xaqc.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
                jconn.sessionOpen(this);
            }
            return qs;
        } else {
            if (xaqs == null) {
                xaqs = xaqc.createXAQueueSession();
                if (currtx != null) {
                    TraceJms.logger.log(BasicLevel.ERROR,"mixed transactions");
                }
                currtx = tx;
                xares = xaqs.getXAResource();
                try {
                    tx.enlistResource(this.getXAResource());
            txover = false;
                } catch (SystemException e) {
                    TraceJms.logger.log(BasicLevel.ERROR,"cannot enlist session:"+e);
                    throw new JMSException(e.toString());
                } catch (RollbackException e) {
                    TraceJms.logger.log(BasicLevel.ERROR,"transaction rolled back");
                    throw new JMSException(e.toString());
                }
            } 
            return xaqs.getQueueSession();
        }
    }

    protected void MOMSessionClose() {
        try {
            if (xaqs != null) {
                xaqs.close();
                xaqs = null;
            }
            if (qs != null) {
                qs.close();
                qs = null;
                jconn.sessionClose(this);
            }
        } catch (JMSException e) {
            TraceJms.logger.log(BasicLevel.ERROR,"exception:"+e);
        }
    }

    // -----------------------------------------------------------------------
    // QueueSession Implementation
    // -----------------------------------------------------------------------

    public QueueBrowser createBrowser(Queue queue) throws JMSException {
        TraceJms.logger.log(BasicLevel.DEBUG, "");
        return getMOMQueueSession().createBrowser(queue);
    }

    public QueueBrowser createBrowser(Queue queue, String messageSelector) throws JMSException {
        TraceJms.logger.log(BasicLevel.DEBUG, "");
        return getMOMQueueSession().createBrowser(queue, messageSelector);
    }

    public Queue createQueue(String queueName) throws JMSException {
        TraceJms.logger.log(BasicLevel.DEBUG, "");
        return getMOMQueueSession().createQueue(queueName);
    }

    public QueueReceiver createReceiver(Queue queue) throws JMSException {
        TraceJms.logger.log(BasicLevel.DEBUG, "");
        return getMOMQueueSession().createReceiver(queue);
    }

    public QueueReceiver createReceiver(Queue queue, String messageSelector) throws JMSException {
        TraceJms.logger.log(BasicLevel.DEBUG, "");
        return getMOMQueueSession().createReceiver(queue, messageSelector);
    }
    
    public QueueSender createSender(Queue queue) throws JMSException {
        TraceJms.logger.log(BasicLevel.DEBUG, "");
        return getMOMQueueSession().createSender(queue);
    }

    public TemporaryQueue createTemporaryQueue() throws JMSException {
        TraceJms.logger.log(BasicLevel.DEBUG, "");
        return getMOMQueueSession().createTemporaryQueue();
    }


}

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