// The contents of this file are subject to the Mozilla Public License
// Version 1.1 (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.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
// the License for the specific language governing rights and
// limitations under the License.
//
// The Original Code is RabbitMQ.
//
// The Initial Developer of the Original Code is VMware, Inc.
// Copyright (c) 2007-2012 VMware, Inc. All rights reserved.
//
package com.rabbitmq.examples;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.QueueingConsumer;
public class SimpleTopicConsumer {
public static void main(String[] args) {
try {
if (args.length < 1 || args.length > 4) {
System.err.print("Usage: SimpleTopicConsumer brokeruri [topicpattern\n" +
" [exchange\n" +
" [queue]]]\n" +
"where\n" +
" - topicpattern defaults to \"#\",\n" +
" - exchange to \"amq.topic\", and\n" +
" - queue to a private, autodelete queue\n");
System.exit(1);
}
String uri = (args.length > 0) ? args[0] : "amqp://localhost";
String topicPattern = (args.length > 1) ? args[1] : "#";
String exchange = (args.length > 2) ? args[2] : null;
String queue = (args.length > 3) ? args[3] : null;
ConnectionFactory cfconn = new ConnectionFactory();
cfconn.setUri(uri);
Connection conn = cfconn.newConnection();
final Channel channel = conn.createChannel();
if (exchange == null) {
exchange = "amq.topic";
} else {
channel.exchangeDeclare(exchange, "topic");
}
if (queue == null) {
queue = channel.queueDeclare().getQueue();
} else {
channel.queueDeclare(queue, false, false, false, null);
}
channel.queueBind(queue, exchange, topicPattern);
System.out.println("Listening to exchange " + exchange + ", pattern " + topicPattern +
" from queue " + queue);
QueueingConsumer consumer = new QueueingConsumer(channel);
channel.basicConsume(queue, consumer);
while (true) {
QueueingConsumer.Delivery delivery = consumer.nextDelivery();
Envelope envelope = delivery.getEnvelope();
System.out.println(envelope.getRoutingKey() + ": " + new String(delivery.getBody()));
channel.basicAck(envelope.getDeliveryTag(), false);
}
} catch (Exception ex) {
System.err.println("Main thread caught exception: " + ex);
ex.printStackTrace();
System.exit(1);
}
}
}