// 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);