[jira] [Closed] (AMQ-4793) issue with messageSelector

["Timothy Bish (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMQ-4793?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Timothy Bish closed AMQ-4793.
-----------------------------

    Resolution: Not A Problem

This is working as designed.  Calling receiveNoWait you always have to deal with not getting a message, there's no guarantee here, which is kind of the point of the method, try but don't wait if one isn't immediately available.  It takes some time for the broker to dispatch a message to the client, so in your simple example code its quite likely you won't get a message on the first try.  It's better to do a timed receive call so that you give the broker some time to dispatch to the client. 

> issue with messageSelector
> --------------------------
>
>                 Key: AMQ-4793
>                 URL: https://issues.apache.org/jira/browse/AMQ-4793
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>            Reporter: ritesh
>
> Having issue with message selector.
> Message is already there in queue (I can confirm with activeMQ browser app). 
> Create consumer with messageSelector and do consumer.receiveNoWait() always receive NULL message.
> Have only three message in queue.
> code sample...
> try
>            {
>             
>             ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616");
>             Connection connection= connectionFactory.createConnection();
>             connection.start();
>             Session session= connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
>             Destination queueDestination = session.createQueue("TestQueue");
>              //using activeMq browser app i can see message is there with JMSCorrelationID=12345 
>              String messageSelector= "JMSCorrelationID = '12345'";
>              MessageConsumer consumer= session.createConsumer(queueDestination,messageSelector);
>              Message message= consumer.receiveNoWait();
>              if(message==null)
>              {
>                  // always return null message
>                  //log message not found
>              }
>                
>            }
>            catch (Exception e)
>            {
>            }
> But, if do this it’s works …
> For(int i=0; i< 7; i++)
> {
> 	Thread.sleep(100);
> message= consumer.receiveNoWait();	
> 	If(message!=null)
> 		Break;
> }
> please help me what am i doing wrong?



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