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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.example.pubsub;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;
import java.util.concurrent.CountDownLatch;
/**
* Simple client that listens for the specified number of msgs on the given Destinaton
*
* The class can take two arguments.
* java Subscriber <destination> <msgCount>
* Where:
* destination is either 'topic' or 'queue' (Default: topic)
* msgCount is the number of messages to send (Default : 100)
*/
public class Subscriber extends Client implements MessageListener
{
CountDownLatch _count;
public Subscriber(String destination, int msgCount)
{
super(destination);
_count = new CountDownLatch(msgCount);
}
public void start()
{
try
{
_session = _connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
_session.createDurableSubscriber((Topic) _setup.getDestination(ConnectionSetup.TOPIC_JNDI_NAME),
"exampleClient").setMessageListener(this);
_connection.start();
_count.await();
System.out.println("Done");
_connection.close();
}
catch (JMSException e)
{
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
catch (InterruptedException e)
{
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
public static void main(String[] args)
{
String destination = args.length > 2 ? args[1] : null;
int msgCount = args.length > 2 ? Integer.parseInt(args[2]) : 100;
new Subscriber(destination, msgCount).start();
}
public void onMessage(Message message)
{
try
{
_count.countDown();
System.out.println("Received msg:" + ((TextMessage) message).getText());
}
catch (JMSException e)
{
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
}
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