jmssessionstubimpl.java

一个java方面的消息订阅发送的源码

/**
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright
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 *    copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the
 *    above copyright notice, this list of conditions and the
 *    following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. The name "Exolab" must not be used to endorse or promote
 *    products derived from this Software without prior written
 *    permission of Exoffice Technologies.  For written permission,
 *    please contact [e-mail].
 *
 * 4. Products derived from this Software may not be called "Exolab"
 *    nor may "Exolab" appear in their names without prior written
 *    permission of Exoffice Technologies. Exolab is a registered
 *    trademark of Exoffice Technologies.
 *
 * 5. Due credit should be given to the Exolab Project
 *    (http://www.exolab.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 2000-2005 (C) Exoffice Technologies Inc. All Rights Reserved.
 *
 * $Id: JmsSessionStubImpl.java,v 1.3 2005/05/24 13:36:38 tanderson Exp $
 */
package org.exolab.jms.client.net;

import java.rmi.RemoteException;
import java.util.List;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.transaction.xa.XAException;
import javax.transaction.xa.Xid;

import org.exolab.jms.client.JmsDestination;
import org.exolab.jms.client.JmsMessageListener;
import org.exolab.jms.client.JmsQueue;
import org.exolab.jms.client.JmsTopic;
import org.exolab.jms.message.MessageImpl;
import org.exolab.jms.net.orb.ORB;
import org.exolab.jms.net.proxy.Proxy;
import org.exolab.jms.server.ServerSession;


/**
 * Wraps an {@link ServerSession}.
 *
 * @author <a href="mailto:[e-mail]">Jim Alateras</a>
 * @version $Revision: 1.3 $ $Date: 2005/05/24 13:36:38 $
 */
public class JmsSessionStubImpl
        implements ServerSession, JmsMessageListener {

    /**
     * This is the message listener for JMS messages. The MessageListener is
     * then responsible for delivering it to the actual consumer.
     */
    private JmsMessageListener _listener = null;

    /**
     * The ORB to export this with.
     */
    private ORB _orb;

    /**
     * The reference to the server session.
     */
    private ServerSession _session = null;


    /**
     * Construct a new <code>JmsSessionStubImpl</code>.
     *
     * @param session     the reference to the server session
     * @param orb         the ORB to export this with
     * @param uri         the URI to export this on
     * @param principal   the security principal. May be <code>null</code>
     * @param credentials the security credentials. May be <code>null</code>
     */
    protected JmsSessionStubImpl(ServerSession session, ORB orb,
                                 String uri, String principal,
                                 String credentials)
            throws RemoteException {
        if (session == null) {
            throw new IllegalArgumentException("Argument 'session' is null");
        }
        if (orb == null) {
            throw new IllegalArgumentException("Argument 'orb' is null");
        }
        _session = session;
        _orb = orb;
        Proxy proxy = orb.exportObjectTo(this, uri, principal, credentials);
        _session.setMessageListener((JmsMessageListener) proxy);
    }

    /**
     * Close and release any resource allocated to this session.
     *
     * @throws JMSException for any JMS error
     */
    public void close() throws JMSException {
        try {
            _session.close();
            _orb.unexportObject(this);
            _session = null;
            _listener = null;
        } catch (RemoteException exception) {
            rethrow(exception);
        }
    }

    /**
     * Acknowledge that a message has been processed.
     *
     * @param consumerId the identity of the consumer performing the ack
     * @param messageId  the message identifier
     * @throws JMSException for any error
     */
    public void acknowledgeMessage(long consumerId, String messageId)
            throws JMSException {
        _session.acknowledgeMessage(consumerId, messageId);
    }

    /**
     * Send a message.
     *
     * @param message the message to send
     * @throws JMSException for any error
     */
    public void send(MessageImpl message) throws JMSException {
        _session.send(message);
    }

    /**
     * Send a set of messages.
     *
     * @param messages a list of <code>MessageImpl</code> instances
     * @throws JMSException for any JMS error
     */
    public void send(List messages) throws JMSException {
        _session.send(messages);
    }

    /**
     * Return the next available message to the specified consumer.
     * <p/>
     * The <code>wait</code> parameter indicates how many milliseconds to wait
     * for a message before returning. If <code>wait</code> is <code>0</code>
     * then do not wait. If <code>wait</code> is <code>-1</code> then wait
     * indefinitely for the next message.
     *
     * @param consumerId the consumer identifier
     * @param wait       number of milliseconds to wait
     * @return the next message or <code>null</code>
     * @throws JMSException for any JMS error
     */
    public MessageImpl receive(long consumerId, long wait)
            throws JMSException {
        return _session.receive(consumerId, wait);
    }

    /**
     * Browse up to count messages.
     *
     * @param consumerId the consumer identifier
     * @param count      the maximum number of messages to receive
     * @return a list of {@link MessageImpl} instances
     * @throws JMSException for any JMS error
     */
    public List browse(long consumerId, int count) throws JMSException {
        return _session.browse(consumerId, count);
    }

    /**
     * Create a new message consumer.
     *
     * @param destination the destination to consume messages from
     * @param selector    the message selector. May be <code>null</code>
     * @param noLocal     if true, and the destination is a topic, inhibits the
     *                    delivery of messages published by its own connection.
     *                    The behavior for <code>noLocal</code> is not specified
     *                    if the destination is a queue.
     * @return the identifty of the message consumer
     * @throws JMSException for any JMS error
     */
    public long createConsumer(JmsDestination destination, String selector,
                               boolean noLocal) throws JMSException {
        return _session.createConsumer(destination, selector, noLocal);
    }

    /**
     * Create a new durable consumer. Durable consumers may only consume from
     * non-temporary <code>Topic</code> destinations.
     *
     * @param topic    the non-temporary <code>Topic</code> to subscribe to
     * @param name     the name used to identify this subscription
     * @param selector only messages with properties matching the message
     *                 selector expression are delivered.  A value of null or an
     *                 empty string indicates that there is no message selector
     *                 for the message consumer.
     * @param noLocal  if set, inhibits the delivery of messages published by
     *                 its own connection
     * @return the identity of the durable consumer
     * @throws JMSException for any JMS error
     */
    public long createDurableConsumer(JmsTopic topic, String name,
                                      String selector, boolean noLocal)
            throws JMSException {
        return _session.createDurableConsumer(topic, name, selector, noLocal);
    }

    /**
     * Create a queue browser for this session. This allows clients to browse a
     * queue without removing any messages.
     *
     * @param queue    the queue to browse
     * @param selector the message selector. May be <code>null</code>
     * @return the identity of the queue browser
     * @throws JMSException for any JMS error
     */
    public long createBrowser(JmsQueue queue, String selector)
            throws JMSException {
        return _session.createBrowser(queue, selector);
    }