Example usage for javax.jms QueueReceiver receiveNoWait

Introduction

In this page you can find the example usage for javax.jms QueueReceiver receiveNoWait.

Prototype

Message receiveNoWait() throws JMSException;

Source Link

Document

Receives the next message if one is immediately available.

Usage

From source file:org.apache.stratos.status.monitor.agent.clients.service.CEPServerClient.java

private static void executeService() throws SQLException {
    int serviceID = MySQLConnectionInitializer.getServiceID(StatusMonitorConstants.CEP);
    AuthConfigBean authConfigBean = StatusMonitorConfigurationBuilder.getAuthConfigBean();

    String userName = authConfigBean.getUserName();
    tcpUserName = userName.replace('@', '!');

    //check whether login success
    if (ServiceLoginClient.loginChecker(StatusMonitorConstants.CEP_HOST, serviceID)) {

        Properties properties = new Properties();
        properties.put(Context.INITIAL_CONTEXT_FACTORY, StatusMonitorAgentConstants.QPID_ICF);
        properties.put(StatusMonitorAgentConstants.CF_NAME_PREFIX + StatusMonitorAgentConstants.CF_NAME,
                getTCPConnectionURL(tcpUserName, authConfigBean.getPassword()));

        InitialContext ctx;/*w ww. ja  va2s. c  om*/
        try {
            ctx = new InitialContext(properties);

            // Lookup connection factory
            QueueConnectionFactory connFactory = (QueueConnectionFactory) ctx
                    .lookup(StatusMonitorAgentConstants.CF_NAME);
            QueueConnection queueConnection = connFactory.createQueueConnection();
            queueConnection.start();
            QueueSession queueSession = queueConnection.createQueueSession(false,
                    QueueSession.AUTO_ACKNOWLEDGE);

            // Send message
            Queue queue = queueSession.createQueue(
                    StatusMonitorAgentConstants.QUEUE_NAME_CEP + ";{create:always, node:{durable: True}}");

            // create the message to send
            TextMessage textMessage = queueSession.createTextMessage("Test Message Hello");
            javax.jms.QueueSender queueSender = queueSession.createSender(queue);
            queueSender.setTimeToLive(100000000);

            QueueReceiver queueReceiver = queueSession.createReceiver(queue);
            queueSender.send(textMessage);

            TextMessage message = (TextMessage) queueReceiver.receiveNoWait();
            if (log.isDebugEnabled()) {
                log.debug("Message in the execute() of CEPServer Client: " + message.getText());
            }
            if (message.getText().equals("Test Message Hello")) {
                MySQLConnector.insertStats(serviceID, true);
                MySQLConnector.insertState(serviceID, true, "");
            } else {
                MySQLConnector.insertStats(serviceID, false);
                MySQLConnector.insertState(serviceID, false, "Send or retrieve messages failed");
            }
            queueSender.close();
            queueSession.close();
            queueConnection.close();

        } catch (JMSException e) {
            MySQLConnector.insertStats(serviceID, false);
            MySQLConnector.insertState(serviceID, false, e.getMessage());
            String msg = "JMS Exception in inserting stats into the DB for the CEPServerClient";
            log.warn(msg, e);
        } catch (NamingException e) {
            MySQLConnector.insertStats(serviceID, false);
            MySQLConnector.insertState(serviceID, false, e.getMessage());
            String msg = "Naming Exception in inserting stats into the DB for the CEPServerClient";
            log.warn(msg, e);
        }
    }
}

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From source file:org.apache.stratos.status.monitor.agent.clients.service.MessageBrokerServiceClient.java

private static void executeService() throws SQLException {
    int serviceID = MySQLConnectionInitializer.getServiceID(StatusMonitorConstants.MESSAGING);
    AuthConfigBean authConfigBean = StatusMonitorConfigurationBuilder.getAuthConfigBean();

    String userName = authConfigBean.getUserName();
    tcpUserName = userName.replace('@', '!');

    //check whether login success
    if (ServiceLoginClient.loginChecker(StatusMonitorConstants.MESSAGING_HOST, serviceID)) {

        Properties properties = new Properties();
        properties.put(Context.INITIAL_CONTEXT_FACTORY, StatusMonitorAgentConstants.QPID_ICF);
        properties.put(StatusMonitorAgentConstants.CF_NAME_PREFIX + StatusMonitorAgentConstants.CF_NAME,
                getTCPConnectionURL(tcpUserName, authConfigBean.getPassword()));

        if (log.isDebugEnabled()) {
            log.debug("getTCPConnectionURL(username,password) = "
                    + getTCPConnectionURL(tcpUserName, authConfigBean.getPassword()));
        }/*  www  . ja  va  2s.c  om*/
        try {
            InitialContext ctx = new InitialContext(properties);
            // Lookup connection factory
            QueueConnectionFactory connFactory = (QueueConnectionFactory) ctx
                    .lookup(StatusMonitorAgentConstants.CF_NAME);
            QueueConnection queueConnection = connFactory.createQueueConnection();
            queueConnection.start();
            QueueSession queueSession = queueConnection.createQueueSession(false,
                    QueueSession.AUTO_ACKNOWLEDGE);

            // Send message
            Queue queue = queueSession.createQueue(
                    StatusMonitorAgentConstants.QUEUE_NAME_MB + ";{create:always, node:{durable: True}}");

            // create the message to send
            TextMessage textMessage = queueSession.createTextMessage("Test Message Hello");
            javax.jms.QueueSender queueSender = queueSession.createSender(queue);
            queueSender.setTimeToLive(100000000);

            QueueReceiver queueReceiver = queueSession.createReceiver(queue);
            queueSender.send(textMessage);

            TextMessage message = (TextMessage) queueReceiver.receiveNoWait();

            if (message.getText().equals("Test Message Hello")) {
                MySQLConnector.insertStats(serviceID, true);
                MySQLConnector.insertState(serviceID, true, "");
            } else {
                MySQLConnector.insertStats(serviceID, false);
                MySQLConnector.insertState(serviceID, false, "Send and retrieve messages failed");
            }
            queueSender.close();
            queueSession.close();
            queueConnection.close();

        } catch (JMSException e) {
            MySQLConnector.insertStats(serviceID, false);
            MySQLConnector.insertState(serviceID, false, e.getMessage());
            String msg = "Exception in executing the client - "
                    + "Status Monitor Agent for MessageBrokerServiceClient";
            log.warn(msg, e);

        } catch (NamingException e) {
            MySQLConnector.insertStats(serviceID, false);
            MySQLConnector.insertState(serviceID, false, e.getMessage());
            String msg = "Naming exception in executing the client - "
                    + "Status Monitor agent for MessageBrokerServiceClient";
            log.warn(msg, e);
        }
    }
}

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