Example usage for javax.jms QueueBrowser getEnumeration

Introduction

In this page you can find the example usage for javax.jms QueueBrowser getEnumeration.

Prototype


Enumeration getEnumeration() throws JMSException;

Source Link

Document

Gets an enumeration for browsing the current queue messages in the order they would be received.

Usage

From source file:org.logicblaze.lingo.jms.JmsClient.java

public Message peek() throws JMSException {
    QueueBrowser browser = createBrowser();
    try {//  w ww  . jav  a2s  .c  o m
        Enumeration iter = browser.getEnumeration();
        if (iter.hasMoreElements()) {
            return (Message) iter.nextElement();
        }
        return null;
    } finally {
        try {
            browser.close();
        } catch (JMSException e) {
            onBrowserCloseException(e);
            return null;
        }
    }
}

From source file:org.symplify.runtime.jms.JMSContextImpl.java

public Message peek(Channel channel) throws Exception {
    Message ret = null;//from   w  w  w .  ja  va  2  s  . c o m
    javax.jms.Queue queue = getQueue(channel);

    if (queue != null) {
        javax.jms.QueueBrowser browser = m_session.createBrowser(queue);

        if (browser.getEnumeration().hasMoreElements()) {
            javax.jms.Message m = (javax.jms.Message) browser.getEnumeration().nextElement();

            if (m instanceof javax.jms.ObjectMessage) {
                ret = (Message) ((javax.jms.ObjectMessage) m).getObject();
            }
        }

        browser.close();

    } else {
        throw new Exception("Unable to find queue for channel");
    }

    if (logger.isDebugEnabled()) {
        logger.debug("Peek on channel " + channel + " = " + ret);
    }

    return (ret);
}

From source file:tools.ConsumerTool.java

public void runQueueBrowser(Session session, Queue queue) throws JMSException, InterruptedException {
    QueueBrowser browser = null;
    if (selector != null) {
        browser = session.createBrowser(queue, selector);
    } else {/*w  w w .j  av a2  s .c  o  m*/
        browser = session.createBrowser(queue);
    }

    Enumeration messages = browser.getEnumeration();
    int perConsumerReceivedMessages = 0;
    while (perConsumerReceivedMessages < numMessages) {
        if (messages != null) {
            while (messages.hasMoreElements()) {
                Message message = (Message) messages.nextElement();
                if (message != null) {
                    perConsumerReceivedMessages++;
                    handleMessage(session, message, perConsumerReceivedMessages);
                }
            }
        }
        Thread.sleep(receiveTimeoutMS);
        messages = browser.getEnumeration();
    }
    browser.close();

}