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Date: Fri, 8 Nov 2013 10:20:54 -0700
Message-ID: 
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Subject: Re: ActiveMQ.DLQ
From: Christian Posta <christian.posta@gmail.com>
To: "users@activemq.apache.org" <users@activemq.apache.org>
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Well, it would be the same as a user-queue... ie.. if something tries
to send to the DLQ, it will be auto-created. So for example, when the
broker checks for expiring messages upon dispatch, if it finds any it
will send them to the DLQ... if that queue, "ActiveMQ.DLQ" is not
already in the system (it's not on a fresh broker install, for
example), then it will be auto-created just like a user queue is.

On Fri, Nov 8, 2013 at 9:26 AM,  <barry.barnett@wellsfargo.com> wrote:
> After reading the wiki, I see the following:
>
> This means that a client can create a new Queue or Topic dynamically eith=
er by
> calling createQueue() or createTopic() on a JMS Session
> creating an instance of ActiveMQTopic or ActiveMQQueue and possibly regis=
tering them in JNDI
>
> This still isn't telling me how ActiveMQ knows when to create the ActiveM=
Q.DLQ.  Are you saying that the client would have to dynamically create it,=
 or again, is it something at the server side system config that's telling =
it to create a DLQ if messages cant be delivered, expired, etc?
>
> Regards,
>
> Barry Barnett
> WMQ Enterprise Services & Solutions
>
>
> -----Original Message-----
> From: Christian Posta [mailto:christian.posta@gmail.com]
> Sent: Friday, November 08, 2013 9:57 AM
> To: users@activemq.apache.org
> Subject: Re: ActiveMQ.DLQ
>
> Nope :)
>
> http://activemq.apache.org/how-do-i-create-new-destinations.html
>
> But it's completely configurable.. ie, you can specify whether destinatio=
ns should be auto-created.. or you can use security to lockdown people from=
 creating destinations on demand... lots of ways to do it, but by default t=
he destinations are auto-created as described in the wiki above.
>
> If you want to have destinations created when the broker starts up, you c=
ould do something like this in the activemq.xml file:
>
>  <broker xmlns=3D"http://activemq.apache.org/schema/core">
>
>     <destinations>
>
>       <queue physicalName=3D"FOO.BAR" />
>
>       <topic physicalName=3D"SOME.TOPIC" />
>
>     </destinations>
>
>   </broker>
>
>
> but it's not necessary....
>
> On Fri, Nov 8, 2013 at 5:58 AM,  <barry.barnett@wellsfargo.com> wrote:
>> Thank you.  But doesn't it have to be in some configuration file somewhe=
re so that the broker knows how to create it when it's needed?  I don't see=
 it in the activemq.xml file.
>>
>> Regards,
>>
>> Barry Barnett
>> WMQ Enterprise Services & Solutions
>>
>>
>>
>> -----Original Message-----
>> From: Christian Posta [mailto:christian.posta@gmail.com]
>> Sent: Thursday, November 07, 2013 3:00 PM
>> To: users@activemq.apache.org
>> Subject: Re: ActiveMQ.DLQ
>>
>> Barry,
>>
>> ActiveMQ by default auto-creates destinations as it needs/requires them.=
 You don't have to define the DLQ explicitly. If a message goes to the Acti=
veMQ.DLQ, or if a consumer listens to the ActiveMQ.DLQ queue, then the brok=
er will create it.
>>
>> You can set up queues ahead of time if you'd like, but it's not necessar=
y.
>>
>>
>>
>> On Thu, Nov 7, 2013 at 11:17 AM,  <barry.barnett@wellsfargo.com> wrote:
>>> It is my understanding that expired messages are stored on the ActiveMQ=
.DLQ queue.  When I start the ActiveMQ broker, I do not see the DLQ defined=
.  If this is where the expired messages go to, wouldn't it be a default qu=
eue for the default configuration?  If not, then do I need to define it usi=
ng that exact name?  What other attributes would I define the queue with?
>>>
>>> I don't see this queue in my activemq.xml file or any config file out o=
f the box...
>>>
>>>
>>> Regards,
>>>
>>> Barry Barnett
>>> WMQ Enterprise Services & Solutions
>>> W
>>>
>>>
>>>
>>
>>
>>
>> --
>> Christian Posta
>> http://www.christianposta.com/blog
>> twitter: @christianposta
>
>
>
> --
> Christian Posta
> http://www.christianposta.com/blog
> twitter: @christianposta


--=20
Christian Posta
http://www.christianposta.com/blog
twitter: @christianposta