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From sparky2708 <da...@columbia.edu>
Subject Re: ActiveMQ onMessage() callback not async
Date Mon, 30 Jul 2007 12:10:00 GMT

I wonder if this has something to do with ACKs for messages processed?


Ladlestein wrote:
> 
> If you look at the javadocs for 
> http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/jms/MessageListener.html
> MessageListener , you'll see that the Session backing your listener won't
> call onMessage while a previous onMessage invocation has yet to return. 
> I'm puzzled why they even need to say that, though, because a 
> http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/jms/Session.html
> Session  is a single-threaded context.  If you want concurrent message
> processing, you will need multiple threads; using multiple Sessions might
> be the way to go.  Someone else with more expertise here could say more.
> 
> 
> sparky2708 wrote:
>> 
>> I am finding that when I receive messages in my java client that I can
>> only process one request at a time. It seems like the method:
>> onMessage(Message arg) from MessageListener interface doesn't get called
>> asynchronously. Do I need to start a thread in this method to get the
>> async behavior that I am looking for or am I missing some option when I
>> subscribe?
>> 
> 
> 

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