activemq-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From beaker <beaker...@freenet.de>
Subject Re: Detect consumers?
Date Mon, 19 May 2008 10:46:49 GMT

Here is my file. I basically took some examples from the example server
mentioned above ... a have one client connected to it that sends messages
and another client that receives them. 

Then I out the third one just for teseting purposes, that should tell me if
there are any consumers. But there's nothing coming in.

Cheers, beaker




rajdavies wrote:
> 
> Can you post your entire code - preferably as a junit test case  
> attached to a jira ?
> 
> 
> cheers,
> 
> Rob
> 
> http://open.iona.com/products/enterprise-activemq
> http://rajdavies.blogspot.com/
> 
> 
> On 19 May 2008, at 07:22, beaker wrote:
> 
>>
>> Hello,
>>
>> I tried the Advisory Topics, but somehow I can not manage to get any
>> advisory messages...
>>
>> I have tested this with a small test server I have found here:
>> http://coenraets.org/blog/2007/01/flex-test-drive-server-for-java-developers-tomcat-based/
>>
>> This is a piece of code where I tried to set up a consumer for the  
>> advisory
>> messages:
>>
>>            ActiveMQDestination topic = (ActiveMQDestination)
>> context.lookup("ChatTopic");
>>
>>            Destination advisoryDestination =
>> AdvisorySupport.getConsumerAdvisoryTopic(topic);
>>
>>            MessageConsumer consumer =
>> session.createConsumer(advisoryDestination);
>>
>> Then I tried to connect some consumers to the topic "ChatTopic", but  
>> I never
>> get an advisory message. Can you tell me what is wrong? Is there  
>> maybe some
>> kind of example or tutorial on how to do this?
>>
>> Cheers,
>> beaker
>>
>>
>> James.Strachan wrote:
>>>
>>> 2008/5/8 beaker <beaker222@freenet.de>:
>>>>
>>>> Hello,
>>>>
>>>> is it possible for a producer to detect, if there are any  
>>>> consumers on
>>>> the
>>>> topic/queue he is sending?
>>>
>>> Yes - you can use advisories...
>>> http://activemq.apache.org/advisory-message.html
>>>
>>> e.g. try using the ConsumerEventSource helper class...
>>> http://activemq.apache.org/maven/activemq-core/apidocs/org/apache/activemq/advisory/ConsumerEventSource.html
>>>
>>>> I want the producer to only send out messages, if there is someone
>>>> listening
>>>> for them.
>>>
>>> We could maybe enhance the JMS client so that it can avoid sending
>>> messages to topics which have no consumers (i.e. to reduce the cost  
>>> of
>>> marshalling the message on the wire and sending it to the broker and
>>> the broker consuming it).
>>>
>>> -- 
>>> James
>>> -------
>>> http://macstrac.blogspot.com/
>>>
>>> Open Source Integration
>>> http://open.iona.com
>>>
>>>
>>
>> -- 
>> View this message in context:
>> http://www.nabble.com/Detect-consumers--tp17126905s2354p17311984.html
>> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>>
> 
> 
> 
> 
> 
> 
> 
> 
http://www.nabble.com/file/p17316562/ConsumerWatcher.java
ConsumerWatcher.java 
-- 
View this message in context: http://www.nabble.com/Detect-consumers--tp17126905s2354p17316562.html
Sent from the ActiveMQ - User mailing list archive at Nabble.com.


Mime
View raw message