Example usage for javax.jms TopicSession unsubscribe

Introduction

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

Prototype

void unsubscribe(String name) throws JMSException;

Source Link

Document

Unsubscribes a durable subscription that has been created by a client.

Usage

From source file:org.wso2.carbon.appfactory.eventing.jms.TopicPublisher.java

public void publishMessage(Event event) throws AppFactoryEventException {
    Properties properties = new Properties();
    properties.put(Context.INITIAL_CONTEXT_FACTORY, QPID_ICF);
    properties.put(CF_NAME_PREFIX + CF_NAME, Util.getTCPConnectionURL());
    properties.put(CarbonConstants.REQUEST_BASE_CONTEXT, "true");
    try {//from  w  w  w .  j  a v  a 2 s .com
        ctx = new InitialContext(properties);
        connFactory = (TopicConnectionFactory) ctx.lookup(CF_NAME);
    } catch (NamingException e) {
        throw new AppFactoryEventException("Failed to initialize InitialContext.", e);
    }

    TopicConnection topicConnection = null;
    TopicSession topicSession = null;
    try {
        topicConnection = connFactory.createTopicConnection();
        topicSession = topicConnection.createTopicSession(false, TopicSession.AUTO_ACKNOWLEDGE);
        // Send message
        String tenantDomain = CarbonContext.getThreadLocalCarbonContext().getTenantDomain();
        Topic topic = topicSession.createTopic(event.getTarget());

        //Until MB supports 'Dynamic Topics' we have to create a subscription, therefore forcing Message broker to
        // create the topic.
        String defaultSubscriptionId = tenantDomain + "/" + DEFAULT_SUBSCRIPTION + UUID.randomUUID();
        topicSubscriber = topicSession.createDurableSubscriber(topic, defaultSubscriptionId);
        // We are unsubscribing from the Topic as soon as
        topicSession.unsubscribe(defaultSubscriptionId);

        // create the message to send
        MapMessage mapMessage = topicSession.createMapMessage();
        mapMessage.setString(MESSAGE_TITLE, event.getMessageTitle());
        mapMessage.setString(MESSAGE_BODY, event.getMessageBody());
        javax.jms.TopicPublisher topicPublisher = topicSession.createPublisher(topic);
        topicConnection.start();
        topicPublisher.publish(mapMessage);
        if (log.isDebugEnabled()) {
            log.debug("Message with Id:" + mapMessage.getJMSMessageID() + ", with title:"
                    + event.getMessageTitle() + " was successfully published.");
        }

    } catch (JMSException e) {
        log.error("Failed to publish message due to " + e.getMessage(), e);
        throw new AppFactoryEventException("Failed to publish message due to " + e.getMessage(), e);
    } finally {
        if (topicSubscriber != null) {
            try {
                topicSubscriber.close();
            } catch (JMSException e) {
                log.error("Failed to close default topic subscriber", e);
            }
        }
        if (topicSession != null) {
            try {
                topicSession.close();
            } catch (JMSException e) {
                log.error("Failed to close topic session", e);
            }
        }
        if (topicConnection != null) {
            try {
                topicConnection.close();
            } catch (JMSException e) {
                log.error("Failed to close topic connection", e);
            }
        }
    }
}

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