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From akuhtz <andreas.ku...@siemens.com>
Subject Re: Are durable topic subscriptions destroyed?
Date Mon, 09 Mar 2009 09:13:18 GMT

Spring Issue created: http://jira.springframework.org/browse/SPR-5552


Claus Ibsen-2 wrote:
> 
> On Thu, Mar 5, 2009 at 12:33 PM, akuhtz <andreas.kuhtz@siemens.com> wrote:
>>
>> There is currently no code to unsubscribe a durable subscriber as Camel
>> uses
>> the XXMessageListenerContainer classes from the spring framework and
>> inside
>> the spring code there is no unsubscribe code. I solved this yesterday by
>> making a copy of the (in my case) SimpleMessageListenerContainer and
>> added
>> the unsubscribe code to the doShutdown() method (I couldn't just extend
>> from
>> SimpleMessageListenerContainer and overwrite doShutdown() because the
>> consumers are private and no protected access method exists, and between
>> close the consumers and close the session there is (unfortunately) no
>> callback where the unsubcribe could be executed.
>>
>> If you find another solution without copying the class please let me know
>> :-)
> You could consider creating a ticket at Spring about this issue to
> allow easier subclassing of the SimpleMessageListenerContainer, or
> callbacks so we can do the unsubscribe there. Would be good to get in
> Spring 3.0.
> 
> 
>>
>>
>> Claus Ibsen-2 wrote:
>>>
>>> On Thu, Mar 5, 2009 at 3:38 AM, ariekenb <aaron.j.riekenberg@lmco.com>
>>> wrote:
>>>>
>>>> If I create a durable topic subscription using the jms or activemq
>>>> components
>>>> (for example
>>>> activemq:topic:myTopic?clientId=client1&durableSubscriptionName=subscription1),
>>>> does camel ever cause the durable subscription to be destroyed?  In
>>>> other
>>>> words will camel ever cause session.unsubscribe to be called?  I'm
>>>> working
>>>> in a situation where I'm implementing failover of a durable
>>>> subscription
>>>> on
>>>> different machines using camel and I want to be sure the durable
>>>> subscription does not get destroyed when the camel context is
>>>> destroyed.
>>>> Just out of curiosity, I'm also wondering how/if one can indicate he
>>>> wants
>>>> the durable subscription to be destroyed when the camel context is
>>>> destroyed.
>>> Not to my knowledge. But I would advice you to double check the source
>>> code of camel-jms
>>> to see if there is any code that would call unsubscribe. Usually such
>>> code would be in doStop or stop methods.
>>>
>>> James Strachan who wrote the camel-jms component would be in a better
>>> position to clarify this.
>>>
>>> With your findings we should update the wiki, so please report back.
>>>
>>>
>>>>
>>>> As an aside there is a small bug on this web page describing durable
>>>> subscriptions (http://camel.apache.org/jms.html).  The first paragraph
>>>> under
>>>> "Notes" states "If you wish to use durable topic subscriptions, you
>>>> need
>>>> to
>>>> specify both clientId and durableSubscriberName."
>>>>  durableSubscriberName
>>>> does not work.  The table below has the correct property:
>>>> durableSubscriptionName.
>>> Thanks for spotting this. Fixed the typo.
>>>
>>>
>>>> --
>>>> View this message in context:
>>>> http://www.nabble.com/Are-durable-topic-subscriptions-destroyed--tp22344211p22344211.html
>>>> Sent from the Camel - Users (activemq) mailing list archive at
>>>> Nabble.com.
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> Claus Ibsen
>>> Apache Camel Committer
>>>
>>> Open Source Integration: http://fusesource.com
>>> Blog: http://davsclaus.blogspot.com/
>>>
>>>
>>
>> --
>> View this message in context:
>> http://www.nabble.com/Are-durable-topic-subscriptions-destroyed--tp22344211p22349650.html
>> Sent from the Camel - Users (activemq) mailing list archive at
>> Nabble.com.
>>
>>
> 
> 
> 
> -- 
> Claus Ibsen
> Apache Camel Committer
> 
> Open Source Integration: http://fusesource.com
> Blog: http://davsclaus.blogspot.com/
> 
> 

-- 
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Sent from the Camel - Users (activemq) mailing list archive at Nabble.com.


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