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MQSeries.net Forum Index » IBM MQ Java / JMS » blocked get.

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asiufy
PostPosted: Mon Sep 10, 2001 7:59 am    Post subject: Reply with quote

Newbie

Joined: 09 Sep 2001
Posts: 5

Hi.

I need to write a Java daemon that listens to a queue for incoming messages.

I have set my getMessageOptions like this:


gmo.options = MQC.MQGMO_WAIT;
gmo.waitInterval = MQC.MQWI_UNLIMITED;


and still I can't get it to block and wait for new messages... Should I wrap the get() call in an endless loop?


Thank you!
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bduncan
PostPosted: Mon Sep 10, 2001 12:22 pm    Post subject: Reply with quote

Padawan

Joined: 11 Apr 2001
Posts: 1554
Location: Silicon Valley

When you say it isn't "blocking" does this mean that it eventually times out and returns a 2033 reason (no messages available)?
Or when you refer to "blocking" do you mean to make it such that other applications can't get from the same queue? If that's the case then you simply need to open the queue for exclusive getting in order to block other applications...
Regardless, if it is dropping out of the MQGET call after some period of time, have the application print out the CompCode and Reason values that the MQGET returns. This will help greatly with figuring out what is going on...


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kolban
PostPosted: Mon Sep 17, 2001 2:48 pm    Post subject: Reply with quote

Grand Master

Joined: 22 May 2001
Posts: 1072
Location: Fort Worth, TX, USA

Make sure that you use the MQQueue overloaded method get() with the MQGetMessageOptions object passed as a reference.
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