ExampleJmsTopology.java

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 * to you under the Apache License, Version 2.0 (the
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 * http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.storm.jms.example;

import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;
import javax.jms.TextMessage;

import backtype.storm.Config;
import backtype.storm.LocalCluster;
import backtype.storm.StormSubmitter;
import org.apache.storm.jms.JmsMessageProducer;
import org.apache.storm.jms.JmsProvider;
import org.apache.storm.jms.JmsTupleProducer;
import org.apache.storm.jms.bolt.JmsBolt;
import org.apache.storm.jms.spout.JmsSpout;
import backtype.storm.topology.TopologyBuilder;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;
import backtype.storm.utils.Utils;

public class ExampleJmsTopology {
	public static final String JMS_QUEUE_SPOUT = "JMS_QUEUE_SPOUT";
	public static final String INTERMEDIATE_BOLT = "INTERMEDIATE_BOLT";
	public static final String FINAL_BOLT = "FINAL_BOLT";
	public static final String JMS_TOPIC_BOLT = "JMS_TOPIC_BOLT";
	public static final String JMS_TOPIC_SPOUT = "JMS_TOPIC_SPOUT";
	public static final String ANOTHER_BOLT = "ANOTHER_BOLT";

	@SuppressWarnings("serial")
	public static void main(String[] args) throws Exception {

		// JMS Queue Provider
		JmsProvider jmsQueueProvider = new SpringJmsProvider(
				"jms-activemq.xml", "jmsConnectionFactory",
				"notificationQueue");
		
		// JMS Topic provider
		JmsProvider jmsTopicProvider = new SpringJmsProvider(
				"jms-activemq.xml", "jmsConnectionFactory",
				"notificationTopic");

		// JMS Producer
		JmsTupleProducer producer = new JsonTupleProducer();

		// JMS Queue Spout
		JmsSpout queueSpout = new JmsSpout();
		queueSpout.setJmsProvider(jmsQueueProvider);
		queueSpout.setJmsTupleProducer(producer);
		queueSpout.setJmsAcknowledgeMode(Session.CLIENT_ACKNOWLEDGE);
		queueSpout.setDistributed(true); // allow multiple instances

		TopologyBuilder builder = new TopologyBuilder();
		
		// spout with 5 parallel instances
		builder.setSpout(JMS_QUEUE_SPOUT, queueSpout, 5);

		// intermediate bolt, subscribes to jms spout, anchors on tuples, and auto-acks
		builder.setBolt(INTERMEDIATE_BOLT,
				new GenericBolt("INTERMEDIATE_BOLT", true, true, new Fields("json")), 3).shuffleGrouping(
				JMS_QUEUE_SPOUT);

		// bolt that subscribes to the intermediate bolt, and auto-acks
		// messages.
		builder.setBolt(FINAL_BOLT, new GenericBolt("FINAL_BOLT", true, true), 3).shuffleGrouping(
				INTERMEDIATE_BOLT);
		
		// bolt that subscribes to the intermediate bolt, and publishes to a JMS Topic		
		JmsBolt jmsBolt = new JmsBolt();
		jmsBolt.setJmsProvider(jmsTopicProvider);
		
		// anonymous message producer just calls toString() on the tuple to create a jms message
		jmsBolt.setJmsMessageProducer(new JmsMessageProducer() {
			@Override
			public Message toMessage(Session session, Tuple input) throws JMSException{
				System.out.println("Sending JMS Message:" + input.toString());
				TextMessage tm = session.createTextMessage(input.toString());
				return tm;
			}
		});
		
		builder.setBolt(JMS_TOPIC_BOLT, jmsBolt).shuffleGrouping(INTERMEDIATE_BOLT);
		
		// JMS Topic spout
		JmsSpout topicSpout = new JmsSpout();
		topicSpout.setJmsProvider(jmsTopicProvider);
		topicSpout.setJmsTupleProducer(producer);
		topicSpout.setJmsAcknowledgeMode(Session.CLIENT_ACKNOWLEDGE);
		topicSpout.setDistributed(false);
		
		builder.setSpout(JMS_TOPIC_SPOUT, topicSpout);
		
		builder.setBolt(ANOTHER_BOLT, new GenericBolt("ANOTHER_BOLT", true, true), 1).shuffleGrouping(
				JMS_TOPIC_SPOUT);

		Config conf = new Config();

		if (args.length > 0) {
			conf.setNumWorkers(3);

			StormSubmitter.submitTopology(args[0], conf,
					builder.createTopology());
		} else {

			conf.setDebug(true);

			LocalCluster cluster = new LocalCluster();
			cluster.submitTopology("storm-jms-example", conf, builder.createTopology());
			Utils.sleep(60000);
			cluster.killTopology("storm-jms-example");
			cluster.shutdown();
		}
	}

}