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From "Timothy Bish (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-3977) receiveNoWait returns NULL when attempting to receive message from Virtual Topic
Date Thu, 16 Aug 2012 13:13:38 GMT

    [ https://issues.apache.org/jira/browse/AMQ-3977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13435949#comment-13435949
] 

Timothy Bish commented on AMQ-3977:
-----------------------------------

There's no round-tripping to the broker unless you have prefetch set to zero.  The client
just checks its local prefetch buffer and if a message is there its returned if not it returns
null.  Depending on what prefetch you have set you can test this out by calling a Thread.sleep
before doing a receiveNoWait and you should see similar behavior to the timed receive call
you were doing.  I still don't see an issue here, please provide a test case if you think
there's a problem.  
                
> receiveNoWait returns NULL when attempting to receive message from Virtual Topic
> --------------------------------------------------------------------------------
>
>                 Key: AMQ-3977
>                 URL: https://issues.apache.org/jira/browse/AMQ-3977
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.6.0
>         Environment: Windows
>            Reporter: badams
>
> Here are my steps that I performed:
> 1) Create Virtual Topic "VirtualTopic.Orders"
> 2) Create consumer "Consumer.A.VirtualTopic.Orders"
> 3) Publish persistent message to VirtualTopic.Orders (I see my message enqueued on my
Queue)
> 4) Attempt to synchronously read the message using the receiveNoWait() method. This returns
null.
> My current work around is using receive(timeout) method. This adds wasted time on my
server and should be fixed.

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