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Posted to users@camel.apache.org by Raster3 <cr...@yahoo.co.in> on 2010/01/31 16:28:20 UTC
Dead Letter Queue
Hi,
I was looking at this http://camel.apache.org/dead-letter-channel.html
Previously I have worked with JMS dead letter / error queues using weblogic.
In Weblogic an error queue is something one configures and associates with a
queue using the weblogic console or using JMX . Depending on the
configuration after a time period or number of retries the message is moved
to the dead letter queue.
Can you please elaborate on what exactly is the value add of camel in this
context.
R
--
View this message in context: http://old.nabble.com/Dead-Letter-Queue-tp27393562p27393562.html
Sent from the Camel - Users mailing list archive at Nabble.com.
Re: Dead Letter Queue
Posted by Willem Jiang <wi...@gmail.com>.
Oh, so do you need to use Camel to implement EIP[1].
If not, can you tell me why do you consider to take a look at camel?
[1] http://camel.apache.org/eip.html
Willem
Raster3 wrote:
> Thanks.
> I am just trying to understand.
> If my dead letter queue is just a jms queue and i dont use the camel error
> handler does camel give any other value add?
>
> R
>
>
>
> willem.jiang wrote:
>> Hi,
>>
>> First Camel dead letter channel is a generate channel. You can not only
>> store the message into a dead letter queue, but also any other Camel
>> endpoints(such as sead, direct or file).
>>
>> Second, Camel dead letter channel has some advance features which are
>> inherited from error handler[1], you can user the try... catch and
>> onwhen, onException to deal with different error message.
>>
>> [1]http://camel.apache.org/error-handler.html
>>
>> Willem
>>
>>
>> Raster3 wrote:
>>> Hi,
>>>
>>> I was looking at this http://camel.apache.org/dead-letter-channel.html
>>> Previously I have worked with JMS dead letter / error queues using
>>> weblogic.
>>>
>>> In Weblogic an error queue is something one configures and associates
>>> with a
>>> queue using the weblogic console or using JMX . Depending on the
>>> configuration after a time period or number of retries the message is
>>> moved
>>> to the dead letter queue.
>>>
>>> Can you please elaborate on what exactly is the value add of camel in
>>> this
>>> context.
>>>
>>> R
>>
>>
>
Re: Dead Letter Queue
Posted by Raster3 <cr...@yahoo.co.in>.
I am also curious how the camel event notifier is implemented.
Would be easy for a topic.
For queues does it use a jms message listener or the jms quebrowsing apis?
Thanks.
Claus Ibsen-2 wrote:
>
> On Mon, Feb 1, 2010 at 9:58 AM, Raster3 <cr...@yahoo.co.in> wrote:
>>
>> Thanks.
>> For monitoring the dead letter queues we have a application.
>> My motivation here is to learn camel and I am trying to get my
>> perspective
>> correct.
>> So far I have set up the sample camel examples and understood some of
>> them.
>>
>
>> Rearding what you mentioned- Does camel have anything to offer for
>> monitoring the dead letter queues?
>>
>
> Camel is a integration kit. You need monitoring tooling for such thing.
> Your organization may very well already use some sort of monitoring
> tooling which can be configured to keep an eye on DLQs in Camel or as
> it may already do in your WebLogic JMS.
>
> Camel offers notifications (EventNotifier) which can be configured to
> fire when a message is moved into DLQ.
>
> And you can always do some custom processing when a message is moved
> to DLQ to alert or whatever that a message was moved to the DLQ.
>
>
>>
>>
>> Claus Ibsen-2 wrote:
>>>
>>> On Mon, Feb 1, 2010 at 4:33 AM, Raster3 <cr...@yahoo.co.in> wrote:
>>>>
>>>> Thanks.
>>>> I am just trying to understand.
>>>> If my dead letter queue is just a jms queue and i dont use the camel
>>>> error
>>>> handler does camel give any other value add?
>>>>
>>>
>>> The DL queue in the JMS broker is for *JMS only* where as Camel DL is
>>> for all kind of messages.
>>> For example you can use it for file based messages as well.
>>>
>>> If all you need is JMS then I suggest to stick to what the JMS broker
>>> offers for error handling. You are already familiar with that and how
>>> to use it.
>>> And I assume you have procedures for how to monitor it and handle
>>> those failed messages when something goes wrong.
>>>
>>>
>>>
>>>> R
>>>>
>>>>
>>>>
>>>> willem.jiang wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> First Camel dead letter channel is a generate channel. You can not
>>>>> only
>>>>> store the message into a dead letter queue, but also any other Camel
>>>>> endpoints(such as sead, direct or file).
>>>>>
>>>>> Second, Camel dead letter channel has some advance features which are
>>>>> inherited from error handler[1], you can user the try... catch and
>>>>> onwhen, onException to deal with different error message.
>>>>>
>>>>> [1]http://camel.apache.org/error-handler.html
>>>>>
>>>>> Willem
>>>>>
>>>>>
>>>>> Raster3 wrote:
>>>>>> Hi,
>>>>>>
>>>>>> I was looking at this
>>>>>> http://camel.apache.org/dead-letter-channel.html
>>>>>> Previously I have worked with JMS dead letter / error queues using
>>>>>> weblogic.
>>>>>>
>>>>>> In Weblogic an error queue is something one configures and associates
>>>>>> with a
>>>>>> queue using the weblogic console or using JMX . Depending on the
>>>>>> configuration after a time period or number of retries the message is
>>>>>> moved
>>>>>> to the dead letter queue.
>>>>>>
>>>>>> Can you please elaborate on what exactly is the value add of camel in
>>>>>> this
>>>>>> context.
>>>>>>
>>>>>> R
>>>>>
>>>>>
>>>>>
>>>>
>>>> --
>>>> View this message in context:
>>>> http://old.nabble.com/Dead-Letter-Queue-tp27393562p27399328.html
>>>> Sent from the Camel - Users mailing list archive at Nabble.com.
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> Claus Ibsen
>>> Apache Camel Committer
>>>
>>> Author of Camel in Action: http://www.manning.com/ibsen/
>>> Open Source Integration: http://fusesource.com
>>> Blog: http://davsclaus.blogspot.com/
>>> Twitter: http://twitter.com/davsclaus
>>>
>>>
>>
>> --
>> View this message in context:
>> http://old.nabble.com/Dead-Letter-Queue-tp27393562p27401261.html
>> Sent from the Camel - Users mailing list archive at Nabble.com.
>>
>>
>
>
>
> --
> Claus Ibsen
> Apache Camel Committer
>
> Author of Camel in Action: http://www.manning.com/ibsen/
> Open Source Integration: http://fusesource.com
> Blog: http://davsclaus.blogspot.com/
> Twitter: http://twitter.com/davsclaus
>
>
--
View this message in context: http://old.nabble.com/Dead-Letter-Queue-tp27393562p27403034.html
Sent from the Camel - Users mailing list archive at Nabble.com.
Re: Dead Letter Queue
Posted by Raster3 <cr...@yahoo.co.in>.
That sounds good.
I would like to try out this. Will get back soon on this.
Thanks.
Claus Ibsen-2 wrote:
>
> On Mon, Feb 1, 2010 at 9:58 AM, Raster3 <cr...@yahoo.co.in> wrote:
>>
>> Thanks.
>> For monitoring the dead letter queues we have a application.
>> My motivation here is to learn camel and I am trying to get my
>> perspective
>> correct.
>> So far I have set up the sample camel examples and understood some of
>> them.
>>
>
>> Rearding what you mentioned- Does camel have anything to offer for
>> monitoring the dead letter queues?
>>
>
> Camel is a integration kit. You need monitoring tooling for such thing.
> Your organization may very well already use some sort of monitoring
> tooling which can be configured to keep an eye on DLQs in Camel or as
> it may already do in your WebLogic JMS.
>
> Camel offers notifications (EventNotifier) which can be configured to
> fire when a message is moved into DLQ.
>
> And you can always do some custom processing when a message is moved
> to DLQ to alert or whatever that a message was moved to the DLQ.
>
>
>>
>>
>> Claus Ibsen-2 wrote:
>>>
>>> On Mon, Feb 1, 2010 at 4:33 AM, Raster3 <cr...@yahoo.co.in> wrote:
>>>>
>>>> Thanks.
>>>> I am just trying to understand.
>>>> If my dead letter queue is just a jms queue and i dont use the camel
>>>> error
>>>> handler does camel give any other value add?
>>>>
>>>
>>> The DL queue in the JMS broker is for *JMS only* where as Camel DL is
>>> for all kind of messages.
>>> For example you can use it for file based messages as well.
>>>
>>> If all you need is JMS then I suggest to stick to what the JMS broker
>>> offers for error handling. You are already familiar with that and how
>>> to use it.
>>> And I assume you have procedures for how to monitor it and handle
>>> those failed messages when something goes wrong.
>>>
>>>
>>>
>>>> R
>>>>
>>>>
>>>>
>>>> willem.jiang wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> First Camel dead letter channel is a generate channel. You can not
>>>>> only
>>>>> store the message into a dead letter queue, but also any other Camel
>>>>> endpoints(such as sead, direct or file).
>>>>>
>>>>> Second, Camel dead letter channel has some advance features which are
>>>>> inherited from error handler[1], you can user the try... catch and
>>>>> onwhen, onException to deal with different error message.
>>>>>
>>>>> [1]http://camel.apache.org/error-handler.html
>>>>>
>>>>> Willem
>>>>>
>>>>>
>>>>> Raster3 wrote:
>>>>>> Hi,
>>>>>>
>>>>>> I was looking at this
>>>>>> http://camel.apache.org/dead-letter-channel.html
>>>>>> Previously I have worked with JMS dead letter / error queues using
>>>>>> weblogic.
>>>>>>
>>>>>> In Weblogic an error queue is something one configures and associates
>>>>>> with a
>>>>>> queue using the weblogic console or using JMX . Depending on the
>>>>>> configuration after a time period or number of retries the message is
>>>>>> moved
>>>>>> to the dead letter queue.
>>>>>>
>>>>>> Can you please elaborate on what exactly is the value add of camel in
>>>>>> this
>>>>>> context.
>>>>>>
>>>>>> R
>>>>>
>>>>>
>>>>>
>>>>
>>>> --
>>>> View this message in context:
>>>> http://old.nabble.com/Dead-Letter-Queue-tp27393562p27399328.html
>>>> Sent from the Camel - Users mailing list archive at Nabble.com.
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> Claus Ibsen
>>> Apache Camel Committer
>>>
>>> Author of Camel in Action: http://www.manning.com/ibsen/
>>> Open Source Integration: http://fusesource.com
>>> Blog: http://davsclaus.blogspot.com/
>>> Twitter: http://twitter.com/davsclaus
>>>
>>>
>>
>> --
>> View this message in context:
>> http://old.nabble.com/Dead-Letter-Queue-tp27393562p27401261.html
>> Sent from the Camel - Users mailing list archive at Nabble.com.
>>
>>
>
>
>
> --
> Claus Ibsen
> Apache Camel Committer
>
> Author of Camel in Action: http://www.manning.com/ibsen/
> Open Source Integration: http://fusesource.com
> Blog: http://davsclaus.blogspot.com/
> Twitter: http://twitter.com/davsclaus
>
>
--
View this message in context: http://old.nabble.com/Dead-Letter-Queue-tp27393562p27402035.html
Sent from the Camel - Users mailing list archive at Nabble.com.
Re: Dead Letter Queue
Posted by Claus Ibsen <cl...@gmail.com>.
On Mon, Feb 1, 2010 at 9:58 AM, Raster3 <cr...@yahoo.co.in> wrote:
>
> Thanks.
> For monitoring the dead letter queues we have a application.
> My motivation here is to learn camel and I am trying to get my perspective
> correct.
> So far I have set up the sample camel examples and understood some of them.
>
> Rearding what you mentioned- Does camel have anything to offer for
> monitoring the dead letter queues?
>
Camel is a integration kit. You need monitoring tooling for such thing.
Your organization may very well already use some sort of monitoring
tooling which can be configured to keep an eye on DLQs in Camel or as
it may already do in your WebLogic JMS.
Camel offers notifications (EventNotifier) which can be configured to
fire when a message is moved into DLQ.
And you can always do some custom processing when a message is moved
to DLQ to alert or whatever that a message was moved to the DLQ.
>
>
> Claus Ibsen-2 wrote:
>>
>> On Mon, Feb 1, 2010 at 4:33 AM, Raster3 <cr...@yahoo.co.in> wrote:
>>>
>>> Thanks.
>>> I am just trying to understand.
>>> If my dead letter queue is just a jms queue and i dont use the camel
>>> error
>>> handler does camel give any other value add?
>>>
>>
>> The DL queue in the JMS broker is for *JMS only* where as Camel DL is
>> for all kind of messages.
>> For example you can use it for file based messages as well.
>>
>> If all you need is JMS then I suggest to stick to what the JMS broker
>> offers for error handling. You are already familiar with that and how
>> to use it.
>> And I assume you have procedures for how to monitor it and handle
>> those failed messages when something goes wrong.
>>
>>
>>
>>> R
>>>
>>>
>>>
>>> willem.jiang wrote:
>>>>
>>>> Hi,
>>>>
>>>> First Camel dead letter channel is a generate channel. You can not only
>>>> store the message into a dead letter queue, but also any other Camel
>>>> endpoints(such as sead, direct or file).
>>>>
>>>> Second, Camel dead letter channel has some advance features which are
>>>> inherited from error handler[1], you can user the try... catch and
>>>> onwhen, onException to deal with different error message.
>>>>
>>>> [1]http://camel.apache.org/error-handler.html
>>>>
>>>> Willem
>>>>
>>>>
>>>> Raster3 wrote:
>>>>> Hi,
>>>>>
>>>>> I was looking at this http://camel.apache.org/dead-letter-channel.html
>>>>> Previously I have worked with JMS dead letter / error queues using
>>>>> weblogic.
>>>>>
>>>>> In Weblogic an error queue is something one configures and associates
>>>>> with a
>>>>> queue using the weblogic console or using JMX . Depending on the
>>>>> configuration after a time period or number of retries the message is
>>>>> moved
>>>>> to the dead letter queue.
>>>>>
>>>>> Can you please elaborate on what exactly is the value add of camel in
>>>>> this
>>>>> context.
>>>>>
>>>>> R
>>>>
>>>>
>>>>
>>>
>>> --
>>> View this message in context:
>>> http://old.nabble.com/Dead-Letter-Queue-tp27393562p27399328.html
>>> Sent from the Camel - Users mailing list archive at Nabble.com.
>>>
>>>
>>
>>
>>
>> --
>> Claus Ibsen
>> Apache Camel Committer
>>
>> Author of Camel in Action: http://www.manning.com/ibsen/
>> Open Source Integration: http://fusesource.com
>> Blog: http://davsclaus.blogspot.com/
>> Twitter: http://twitter.com/davsclaus
>>
>>
>
> --
> View this message in context: http://old.nabble.com/Dead-Letter-Queue-tp27393562p27401261.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>
>
--
Claus Ibsen
Apache Camel Committer
Author of Camel in Action: http://www.manning.com/ibsen/
Open Source Integration: http://fusesource.com
Blog: http://davsclaus.blogspot.com/
Twitter: http://twitter.com/davsclaus
Re: Dead Letter Queue
Posted by Raster3 <cr...@yahoo.co.in>.
Thanks.
For monitoring the dead letter queues we have a application.
My motivation here is to learn camel and I am trying to get my perspective
correct.
So far I have set up the sample camel examples and understood some of them.
Rearding what you mentioned- Does camel have anything to offer for
monitoring the dead letter queues?
Claus Ibsen-2 wrote:
>
> On Mon, Feb 1, 2010 at 4:33 AM, Raster3 <cr...@yahoo.co.in> wrote:
>>
>> Thanks.
>> I am just trying to understand.
>> If my dead letter queue is just a jms queue and i dont use the camel
>> error
>> handler does camel give any other value add?
>>
>
> The DL queue in the JMS broker is for *JMS only* where as Camel DL is
> for all kind of messages.
> For example you can use it for file based messages as well.
>
> If all you need is JMS then I suggest to stick to what the JMS broker
> offers for error handling. You are already familiar with that and how
> to use it.
> And I assume you have procedures for how to monitor it and handle
> those failed messages when something goes wrong.
>
>
>
>> R
>>
>>
>>
>> willem.jiang wrote:
>>>
>>> Hi,
>>>
>>> First Camel dead letter channel is a generate channel. You can not only
>>> store the message into a dead letter queue, but also any other Camel
>>> endpoints(such as sead, direct or file).
>>>
>>> Second, Camel dead letter channel has some advance features which are
>>> inherited from error handler[1], you can user the try... catch and
>>> onwhen, onException to deal with different error message.
>>>
>>> [1]http://camel.apache.org/error-handler.html
>>>
>>> Willem
>>>
>>>
>>> Raster3 wrote:
>>>> Hi,
>>>>
>>>> I was looking at this http://camel.apache.org/dead-letter-channel.html
>>>> Previously I have worked with JMS dead letter / error queues using
>>>> weblogic.
>>>>
>>>> In Weblogic an error queue is something one configures and associates
>>>> with a
>>>> queue using the weblogic console or using JMX . Depending on the
>>>> configuration after a time period or number of retries the message is
>>>> moved
>>>> to the dead letter queue.
>>>>
>>>> Can you please elaborate on what exactly is the value add of camel in
>>>> this
>>>> context.
>>>>
>>>> R
>>>
>>>
>>>
>>
>> --
>> View this message in context:
>> http://old.nabble.com/Dead-Letter-Queue-tp27393562p27399328.html
>> Sent from the Camel - Users mailing list archive at Nabble.com.
>>
>>
>
>
>
> --
> Claus Ibsen
> Apache Camel Committer
>
> Author of Camel in Action: http://www.manning.com/ibsen/
> Open Source Integration: http://fusesource.com
> Blog: http://davsclaus.blogspot.com/
> Twitter: http://twitter.com/davsclaus
>
>
--
View this message in context: http://old.nabble.com/Dead-Letter-Queue-tp27393562p27401261.html
Sent from the Camel - Users mailing list archive at Nabble.com.
Re: Dead Letter Queue
Posted by Claus Ibsen <cl...@gmail.com>.
On Mon, Feb 1, 2010 at 4:33 AM, Raster3 <cr...@yahoo.co.in> wrote:
>
> Thanks.
> I am just trying to understand.
> If my dead letter queue is just a jms queue and i dont use the camel error
> handler does camel give any other value add?
>
The DL queue in the JMS broker is for *JMS only* where as Camel DL is
for all kind of messages.
For example you can use it for file based messages as well.
If all you need is JMS then I suggest to stick to what the JMS broker
offers for error handling. You are already familiar with that and how
to use it.
And I assume you have procedures for how to monitor it and handle
those failed messages when something goes wrong.
> R
>
>
>
> willem.jiang wrote:
>>
>> Hi,
>>
>> First Camel dead letter channel is a generate channel. You can not only
>> store the message into a dead letter queue, but also any other Camel
>> endpoints(such as sead, direct or file).
>>
>> Second, Camel dead letter channel has some advance features which are
>> inherited from error handler[1], you can user the try... catch and
>> onwhen, onException to deal with different error message.
>>
>> [1]http://camel.apache.org/error-handler.html
>>
>> Willem
>>
>>
>> Raster3 wrote:
>>> Hi,
>>>
>>> I was looking at this http://camel.apache.org/dead-letter-channel.html
>>> Previously I have worked with JMS dead letter / error queues using
>>> weblogic.
>>>
>>> In Weblogic an error queue is something one configures and associates
>>> with a
>>> queue using the weblogic console or using JMX . Depending on the
>>> configuration after a time period or number of retries the message is
>>> moved
>>> to the dead letter queue.
>>>
>>> Can you please elaborate on what exactly is the value add of camel in
>>> this
>>> context.
>>>
>>> R
>>
>>
>>
>
> --
> View this message in context: http://old.nabble.com/Dead-Letter-Queue-tp27393562p27399328.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>
>
--
Claus Ibsen
Apache Camel Committer
Author of Camel in Action: http://www.manning.com/ibsen/
Open Source Integration: http://fusesource.com
Blog: http://davsclaus.blogspot.com/
Twitter: http://twitter.com/davsclaus
Re: Dead Letter Queue
Posted by Raster3 <cr...@yahoo.co.in>.
Thanks.
I am just trying to understand.
If my dead letter queue is just a jms queue and i dont use the camel error
handler does camel give any other value add?
R
willem.jiang wrote:
>
> Hi,
>
> First Camel dead letter channel is a generate channel. You can not only
> store the message into a dead letter queue, but also any other Camel
> endpoints(such as sead, direct or file).
>
> Second, Camel dead letter channel has some advance features which are
> inherited from error handler[1], you can user the try... catch and
> onwhen, onException to deal with different error message.
>
> [1]http://camel.apache.org/error-handler.html
>
> Willem
>
>
> Raster3 wrote:
>> Hi,
>>
>> I was looking at this http://camel.apache.org/dead-letter-channel.html
>> Previously I have worked with JMS dead letter / error queues using
>> weblogic.
>>
>> In Weblogic an error queue is something one configures and associates
>> with a
>> queue using the weblogic console or using JMX . Depending on the
>> configuration after a time period or number of retries the message is
>> moved
>> to the dead letter queue.
>>
>> Can you please elaborate on what exactly is the value add of camel in
>> this
>> context.
>>
>> R
>
>
>
--
View this message in context: http://old.nabble.com/Dead-Letter-Queue-tp27393562p27399328.html
Sent from the Camel - Users mailing list archive at Nabble.com.
Re: Dead Letter Queue
Posted by Willem Jiang <wi...@gmail.com>.
Hi,
First Camel dead letter channel is a generate channel. You can not only
store the message into a dead letter queue, but also any other Camel
endpoints(such as sead, direct or file).
Second, Camel dead letter channel has some advance features which are
inherited from error handler[1], you can user the try... catch and
onwhen, onException to deal with different error message.
[1]http://camel.apache.org/error-handler.html
Willem
Raster3 wrote:
> Hi,
>
> I was looking at this http://camel.apache.org/dead-letter-channel.html
> Previously I have worked with JMS dead letter / error queues using weblogic.
>
> In Weblogic an error queue is something one configures and associates with a
> queue using the weblogic console or using JMX . Depending on the
> configuration after a time period or number of retries the message is moved
> to the dead letter queue.
>
> Can you please elaborate on what exactly is the value add of camel in this
> context.
>
> R