JmsTemplate not browsing queue correctly

Question

I am always getting empty list. I have messages on queues which have not been consumed. I am passing the correct queue name.

List<TextMessage> messages = jmsTemplate.browse(destinationQueueName, (session, browser) -> {
    Enumeration<?> browserEnumeration = browser.getEnumeration();
    List<TextMessage> messageList = new ArrayList<TextMessage>();
    while (browserEnumeration.hasMoreElements()) {
        messageList.add((TextMessage) browserEnumeration.nextElement());
    }
    
    return messageList;
});

Is it possible there's something _other than_ a `TextMessage` on the queue? If so, your code would break. — Justin Bertram, Mar 17 '22 at 14:41
@JustinBertram because i am sending json string to the queue.No other app is reading the queue — hello world, Mar 17 '22 at 15:02
@JustinBertram This is the code i am using to send message to queue `jmsTemplate.convertAndSend(destQueue, message);` message is a string. — hello world, Mar 17 '22 at 15:03
If the code is running without any error, you are either reading wrong q or the q is empty. Essentiality configuration error. — Talijanac, Mar 31 '22 at 11:24

score 0 · Answer 1 · answered Jul 04 '23 at 13:21

I can confirm the code in question is correct. I used the code successfully in Kotlin to count the number of messages in dead letter queue of an Azure service bus.

var messageCount = 0
serviceBusDeadLetterQueueJmsTemplate.browse("${destination}/\$deadletterqueue") { _, queueBrowser ->
    val browserEnumeration = queueBrowser.enumeration
    while (browserEnumeration.hasMoreElements()) {
        browserEnumeration.nextElement()
        messageCount++
    }
}
return messageCount

To find out what is wrong it can help to place a breakpoint inside the callback .

JmsTemplate not browsing queue correctly

1 Answers1

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