clusterqueue.java

一个类似于openJMS分布在ObjectWeb之下的JMS消息中间件。

/*
 * JORAM: Java(TM) Open Reliable Asynchronous Messaging
 * Copyright (C) 2004 - France Telecom R&D
 *
 * 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.
 *
 * Initial developer(s): Nicolas Tachker (ScalAgent)
 * Contributor(s):
 */
package org.objectweb.joram.client.jms.admin;

import org.objectweb.joram.client.jms.Destination;
import org.objectweb.joram.client.jms.Queue;
import org.objectweb.joram.shared.admin.*;

import java.net.ConnectException;
import java.util.Hashtable;
import java.util.Enumeration;
import java.util.Properties;

import javax.jms.JMSException;

/**
 * this is a sample.
 */
public class ClusterQueue extends ClusterDestination implements javax.jms.Queue
{
  /** 
   * Constructs a cluster queue.
   *
   * @param cluster  Hashtable of the cluster agent destination.
   */
  public ClusterQueue(Hashtable cluster) {
    super(cluster);
  }

  /** 
   * Constructs an empty queue.
   */
  public ClusterQueue() {}

  /** return the appropriate destination of cluster */
  public Destination getDestination() {
    String location = System.getProperty("location");
    Destination dest = null;
    if (location != null) {
      dest = (Destination) cluster.get(location);
    }
    if (dest == null) {
      Enumeration e = cluster.keys();
      dest = (Destination) cluster.get((String) e.nextElement());
    }
    return dest;
  }

  /** Returns a String image of the cluster queue. */
  public String toString()
  {
    return "ClusterQueue:" + cluster;
  }

  /**
   * API method.
   *
   * @exception JMSException  Actually never thrown.
   */
  public String getQueueName() throws JMSException
  {
    return getName();
  }
}