Example usage for javax.jms TopicSession createSubscriber

Introduction

In this page you can find the example usage for javax.jms TopicSession createSubscriber.

Prototype

TopicSubscriber createSubscriber(Topic topic) throws JMSException;

Source Link

Document

Creates a nondurable subscriber to the specified topic.

Usage

From source file:org.apache.stratos.adc.topology.mgt.subscriber.TopologySubscriber.java

public static void subscribe(String topicName) {
    Properties initialContextProperties = new Properties();
    TopicSubscriber topicSubscriber = null;
    TopicSession topicSession = null;
    TopicConnection topicConnection = null;
    InitialContext initialContext = null;

    initialContextProperties.put("java.naming.factory.initial",
            "org.wso2.andes.jndi.PropertiesFileInitialContextFactory");

    String mbServerIp = System.getProperty(TopologyConstants.MB_SERVER_IP) == null
            ? TopologyConstants.DEFAULT_MB_SERVER_IP
            : System.getProperty(TopologyConstants.MB_SERVER_IP);

    String connectionString = "amqp://admin:admin@clientID/carbon?brokerlist='tcp://" + mbServerIp
            + "'&reconnect='true'";
    initialContextProperties.put("connectionfactory.qpidConnectionfactory", connectionString);

    try {//w w  w .  java2  s .  co m
        initialContext = new InitialContext(initialContextProperties);
        TopicConnectionFactory topicConnectionFactory = (TopicConnectionFactory) initialContext
                .lookup("qpidConnectionfactory");
        topicConnection = topicConnectionFactory.createTopicConnection();
        topicConnection.start();
        topicSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);

        Topic topic = topicSession.createTopic(topicName);
        topicSubscriber = topicSession.createSubscriber(topic);

        topicSubscriber.setMessageListener(new TopologyListener());

    } catch (Exception e) {
        log.error(e.getMessage(), e);

        try {
            if (topicSubscriber != null) {
                topicSubscriber.close();
            }

            if (topicSession != null) {
                topicSession.close();
            }

            if (topicConnection != null) {
                topicConnection.close();
            }
        } catch (JMSException e1) {
            // ignore
        }

    } finally {
        // start the health checker
        Thread healthChecker = new Thread(new TopicHealthChecker(topicName, topicSubscriber));
        healthChecker.start();
    }
}

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From source file:org.apache.stratos.messaging.broker.subscribe.TopicSubscriber.java

private void createSubscriber(TopicSession topicSession) throws JMSException {
    Topic topic = connector.getTopic();//from  w ww  .j  a va2s .com
    if (topic == null) {
        // if topic doesn't exist, create it.
        topic = topicSession.createTopic(topicName);
    }
    topicSubscriber = topicSession.createSubscriber(topic);
    topicSubscriber.setMessageListener(messageListener);
}

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From source file:org.apache.stratos.messaging.broker.connect.amqp.AmqpTopicSubscriber.java

@Override
public void subscribe() {
    try {//  w w  w .  j ava  2 s  .co m
        TopicSession topicSession = newSession();
        Topic topic = lookupTopic(topicName);
        if (topic == null) {
            // if topic doesn't exist, create it.
            topic = topicSession.createTopic(topicName);
        }
        javax.jms.TopicSubscriber topicSubscriber = topicSession.createSubscriber(topic);
        topicSubscriber.setMessageListener(new javax.jms.MessageListener() {
            @Override
            public void onMessage(Message message) {
                try {
                    String topicName = null, messageText = null;

                    if (message instanceof ActiveMQTextMessage) {
                        ActiveMQTextMessage textMessage = (ActiveMQTextMessage) message;
                        topicName = textMessage.getDestination().getPhysicalName();
                        messageText = textMessage.getText();
                    } else if (message instanceof ActiveMQBytesMessage) {
                        ActiveMQBytesMessage bytesMessage = (ActiveMQBytesMessage) message;
                        topicName = bytesMessage.getDestination().getPhysicalName();
                        messageText = new String(bytesMessage.getContent().data);
                    } else {
                        throw new RuntimeException(
                                String.format("Could not receive message, " + "unknown JMS message type: %s",
                                        message.getClass().getName()));
                    }
                    org.apache.stratos.messaging.domain.Message message_ = new org.apache.stratos.messaging.domain.Message(
                            topicName, messageText);
                    messageListener.messageReceived(message_);
                } catch (Exception e) {
                    String error = "An error occurred when receiving message";
                    log.error(error, e);
                }
            }
        });
    } catch (Exception e) {
        String message = "Could not subscribe to topic: " + topicName;
        log.error(message, e);
        throw new MessagingException(message, e);
    }
}

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From source file:org.apache.stratos.lb.endpoint.subscriber.TopologySubscriber.java

public static void subscribe(String topicName) {
    Properties initialContextProperties = new Properties();
    TopicSubscriber topicSubscriber = null;
    TopicSession topicSession = null;
    TopicConnection topicConnection = null;
    InitialContext initialContext = null;

    initialContextProperties.put("java.naming.factory.initial",
            "org.wso2.andes.jndi.PropertiesFileInitialContextFactory");

    String mbServerUrl = null;/*  w ww . ja va2  s.co  m*/
    if (ConfigHolder.getInstance().getLbConfig() != null) {
        mbServerUrl = ConfigHolder.getInstance().getLbConfig().getLoadBalancerConfig().getMbServerUrl();
    }
    String connectionString = "amqp://admin:admin@clientID/carbon?brokerlist='tcp://"
            + (mbServerUrl == null ? TopologyConstants.DEFAULT_MB_SERVER_URL : mbServerUrl)
            + "'&reconnect='true'";
    initialContextProperties.put("connectionfactory.qpidConnectionfactory", connectionString);

    try {
        initialContext = new InitialContext(initialContextProperties);
        TopicConnectionFactory topicConnectionFactory = (TopicConnectionFactory) initialContext
                .lookup("qpidConnectionfactory");
        topicConnection = topicConnectionFactory.createTopicConnection();
        topicConnection.start();
        topicSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);

        Topic topic = topicSession.createTopic(topicName);
        topicSubscriber = topicSession.createSubscriber(topic);

        topicSubscriber.setMessageListener(new TopologyListener());

    } catch (Exception e) {
        log.error(e.getMessage(), e);

        try {
            if (topicSubscriber != null) {
                topicSubscriber.close();
            }

            if (topicSession != null) {
                topicSession.close();
            }

            if (topicConnection != null) {
                topicConnection.close();
            }
        } catch (JMSException e1) {
            // ignore
        }

    } finally {
        // start the health checker
        Thread healthChecker = new Thread(new TopicHealthChecker(topicName, topicSubscriber));
        healthChecker.start();
    }
}

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From source file:org.openhie.openempi.notification.impl.NotificationServiceImpl.java

public void registerListener(String eventTypeName, MessageHandler handler) {
    if (brokerService == null || !brokerInitialized) {
        log.debug("The broker service is not running in registerListener.");
        return;//from w ww.  j  a v a 2 s .  c  o m
    }

    log.info("Registering handler for event " + eventTypeName);
    if (!isValidHandler(handler)) {
        return;
    }

    Topic topic = topicMap.get(eventTypeName);
    if (topic == null) {
        log.error("Caller attempted to register interest to events of unknown type " + eventTypeName);
        throw new RuntimeException("Unknown event type specified in registration request.");
    }

    if (isListenerRegistered(handler, eventTypeName)) {
        log.warn("Caller attempted to register interest for the same event again.");
        return;
    }
    ConnectionFactory connectionFactory = jmsTemplate.getConnectionFactory();
    try {
        TopicConnection connection = (TopicConnection) connectionFactory.createConnection();
        if (connection.getClientID() == null) {
            connection.setClientID(handler.getClientId());
        }
        log.debug("Connection is of type " + connection);
        TopicSession topicSession = connection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
        TopicSubscriber subscriber = topicSession.createSubscriber(topic);
        MessageListenerImpl listener = new MessageListenerImpl(connection, topicSession, subscriber, handler);
        saveListenerRegistration(listener, eventTypeName);
        subscriber.setMessageListener(listener);
        connection.start();
    } catch (JMSException e) {
        log.error("Failed while setting up a registrant for notification events. Error: " + e, e);
        throw new RuntimeException("Unable to setup registration for event notification: " + e.getMessage());
    }
}

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From source file:org.openmrs.event.EventEngine.java

/**
 * @see Event#subscribe(Destination, EventListener)
 *//*from ww  w  .ja v  a  2s  .c  o  m*/
public void subscribe(Destination destination, final EventListener listenerToRegister) {

    initializeIfNeeded();

    TopicConnection conn;
    Topic topic = (Topic) destination;

    try {
        conn = (TopicConnection) jmsTemplate.getConnectionFactory().createConnection();
        TopicSession session = conn.createTopicSession(false, TopicSession.AUTO_ACKNOWLEDGE);
        TopicSubscriber subscriber = session.createSubscriber(topic);
        subscriber.setMessageListener(new MessageListener() {

            @Override
            public void onMessage(Message message) {
                listenerToRegister.onMessage(message);
            }
        });

        //Check if this is a duplicate and remove it
        String key = topic.getTopicName() + DELIMITER + listenerToRegister.getClass().getName();
        if (subscribers.containsKey(key)) {
            unsubscribe(destination, listenerToRegister);
        }

        subscribers.put(key, subscriber);
        conn.start();

    } catch (JMSException e) {
        // TODO Auto-generated catch block. Do something smarter here.
        e.printStackTrace();
    }

    //      List<EventListener> currentListeners = listeners.get(key);
    //
    //      if (currentListeners == null) {
    //         currentListeners = new ArrayList<EventListener>();
    //         currentListeners.add(listenerToRegister);
    //         listeners.put(key, currentListeners);
    //         if (log.isInfoEnabled())
    //            log.info("subscribed: " + listenerToRegister + " to key: "
    //                  + key);
    //
    //      } else {
    //         // prevent duplicates because of weird spring loading
    //         String listernToRegisterName = listenerToRegister.getClass()
    //               .getName();
    //         Iterator<EventListener> iterator = currentListeners.iterator();
    //         while (iterator.hasNext()) {
    //            EventListener lstnr = iterator.next();
    //            if (lstnr.getClass().getName().equals(listernToRegisterName))
    //               iterator.remove();
    //         }
    //
    //         if (log.isInfoEnabled())
    //            log.info("subscribing: " + listenerToRegister + " to key: "
    //                  + key);
    //
    //         currentListeners.add(listenerToRegister);
    //      }

}

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From source file:com.zotoh.maedr.device.JmsIO.java

private void inizTopic(Context ctx, Object obj) throws Exception {

    TopicConnectionFactory f = (TopicConnectionFactory) obj;
    final JmsIO me = this;
    TopicConnection conn;/*from ww  w . ja v a2 s  .  com*/
    Topic t = (Topic) ctx.lookup(_dest);

    if (!isEmpty(_jmsUser)) {
        conn = f.createTopicConnection(_jmsUser, _jmsPwd);
    } else {
        conn = f.createTopicConnection();
    }

    _conn = conn;

    TopicSession s = conn.createTopicSession(false, Session.CLIENT_ACKNOWLEDGE);
    TopicSubscriber b;

    if (_durable) {
        b = s.createDurableSubscriber(t, GUID.generate());
    } else {
        b = s.createSubscriber(t);
    }

    b.setMessageListener(new MessageListener() {
        public void onMessage(Message msg) {
            me.onMessage(msg);
        }
    });
}

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