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Subject: RE: spring DeadLetterChannel redelivery config
Date: Mon, 7 Jul 2008 16:01:09 +0200
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Thread-Topic: spring DeadLetterChannel redelivery config
Thread-Index: AcjgJ1iBlz6Cg7nfTDSP8rcfQ88+3gAElQ3Q
From: "Claus Ibsen" <ci@silverbullet.dk>
To: <camel-user@activemq.apache.org>
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Hi

Can you try running it outside ActiveMQ eg from camel:run. To see that =
it works. Then we can identify the problem with ActiveMQ later.

I have added a unit test to camel-spring that works with your =
configuration.
It gets the DeadLetterChannel that is configured as a spring bean and =
uses the redelivery prorperties as well.



Med venlig hilsen
=20
Claus Ibsen
......................................
Silverbullet
Skovsg=E5rdsv=E6nget 21
8362 H=F8rning
Tlf. +45 2962 7576
Web: www.silverbullet.dk

-----Original Message-----
From: vguna [mailto:grave@gmx.de]=20
Sent: 7. juli 2008 13:49
To: camel-user@activemq.apache.org
Subject: RE: spring DeadLetterChannel redelivery config


Hi again.

I recently encountered that the redeliveryPolicy still doesn't work as
expected. Basically it does the redelivery - but with default settings =
as it
seems.

Tried this configuration in activemq.xml with camel 1.4 snapshot:

    <camelContext id=3D"camel"
xmlns=3D"http://activemq.apache.org/camel/schema/spring">

        <route errorHandlerRef=3D"deadLetterErrorHandler">
                <from uri=3D"activemq:NEW" />
        </route>
    </camelContext>

<bean id=3D"deadLetterErrorHandler"
class=3D"org.apache.camel.builder.DeadLetterChannelBuilder">
    <property name=3D"redeliveryPolicy" ref=3D"redeliveryPolicyConfig"/>
</bean>

<bean id=3D"redeliveryPolicyConfig"
class=3D"org.apache.camel.processor.RedeliveryPolicy">
    <property name=3D"maximumRedeliveries" value=3D"3"/>
    <property name=3D"initialRedeliveryDelay" value=3D"10000"/>
    <property name=3D"useExponentialBackOff" value=3D"true"/>
    <property name=3D"backOffMultiplier" value=3D"2" />
</bean>

Redelivery takes place in 30 seconds with a retry count of 5 instead of =
the
values configured. This might be because the errorHandlerRef on route =
isn't
evaluated at all. If I change this to foobar, it doesn't complain about =
it
on startup.

So what I'm doing wrong?

Regards,
Veit




Claus Ibsen wrote:
>=20
> Hi
>=20
> Thanks a lot for sharing this. Handy for others as well.
> There could be an issue with the initial delay vs. repated delay.
>=20
> Do you mind creating a JIRA ticket for this - then its not forgotten.
> Would be nice with a special delay for the first redelivery and then
> another setting for the repeated delay.=20
>=20
>=20
> Med venlig hilsen
> =20
> Claus Ibsen
> ......................................
> Silverbullet
> Skovsg=E5rdsv=E6nget 21
> 8362 H=F8rning
> Tlf. +45 2962 7576
> Web: www.silverbullet.dk
>=20
> -----Original Message-----
> From: vguna [mailto:grave@gmx.de]=20
> Sent: 7. juli 2008 11:17
> To: camel-user@activemq.apache.org
> Subject: Re: spring DeadLetterChannel redelivery config
>=20
>=20
> Hi James.
>=20
> Thanks for the reply. It seems to work now. For all, who asking =
themselves
> how a xml configuration for this will look like, here's an example:
>=20
>     <camelContext id=3D"camel"
> xmlns=3D"http://activemq.apache.org/camel/schema/spring">
>=20
>         <route errorHandlerRef=3D"deadLetterErrorHandler">
>                 <from uri=3D"activemq:NEW" />
>         </route>
>=20
>     </camelContext>
>=20
> <bean id=3D"deadLetterErrorHandler"
> class=3D"org.apache.camel.builder.DeadLetterChannelBuilder">
>     <property name=3D"redeliveryPolicy" =
ref=3D"redeliveryPolicyConfig"/>
> </bean>
>=20
> <bean id=3D"redeliveryPolicyConfig"
> class=3D"org.apache.camel.processor.RedeliveryPolicy">
>     <property name=3D"maximumRedeliveries" value=3D"4"/>
>     <property name=3D"initialRedeliveryDelay" value=3D"30000"/>
>     <property name=3D"useExponentialBackOff" value=3D"true"/>
> </bean>
>=20
>=20
> Still one problem left. When an error occurs, a redelivery is executed
> immediately - without the specified delay. After
> that, the redeliveryDelay is used correctly.Is this by design? Would =
be
> nice, if one could configure a "redeliveryDelay" and a
> "initialRedliveryDelay". Or just simply use the delay on the first
> redelivery attempt, too.
>=20
> Regards,
> Veit
>=20
>=20
>=20
>=20
>=20
> James.Strachan wrote:
>>=20
>> I've recently fixed this...
>>=20
>> https://issues.apache.org/activemq/browse/CAMEL-662
>>=20
>> so you can now specify an errorHandlerRef on a <camelContext> a
>> <route> or <pipeline> element to refer to a spring bean which could =
be
>> a DeadLetterChannelBuilder or a TransactionalErrorHandlerBuilder etc.
>>=20
>> i.e. you can define the errror handler as a normal spring bean now
>>=20
>> 2008/3/7 Marc Giger <gigerstyle@gmx.ch>:
>>> Hi,
>>>
>>> I'm trying to configure the DeadLetterChannel with spring.
>>> Unfortunately without success. No matter where I declare the
>>> <onException>, camel tries to redeliver the message 5 times in the =
case
>>> of an exception.
>>>
>>> How must the following configuration be modified so that camel just
>>> tries to deliver once?
>>>
>>> <camelContext id=3D"camel"
>>> xmlns=3D"http://activemq.apache.org/camel/schema/spring">
>>> <route>
>>>            <from uri=3D"cxf:bean:routerEndpoint"/>
>>>            <onException> <!-- no effect -->
>>>                <redeliveryPolicy>
>>>                    <maximumRedeliveries>0</maximumRedeliveries>
>>>                </redeliveryPolicy>
>>>            </onException>
>>>            <process ref=3D"decryptProcessor">
>>>                <onException> <!-- no effect -->
>>>                    <redeliveryPolicy>
>>>                        <maximumRedeliveries>0</maximumRedeliveries>
>>>                    </redeliveryPolicy>
>>>                </onException>
>>>            </process>
>>>            <choice>
>>>                <when>
>>>                    <methodCall bean=3D"endpointSelector"
>>> method=3D"matches"/> <to
>>> uri=3D"cxf:bean:serviceEndpoint?dataFormat=3DMESSAGE"/> </when>
>>>                <otherwise>
>>>                    <to
>>> uri=3D"cxf:bean:localEndpoint"/> </otherwise>
>>>            </choice>
>>>        </route>
>>>    </camelContext>
>>>
>>> Thanks a lot!
>>>
>>> Cheers,
>>>
>>> Marc
>>>
>>=20
>>=20
>>=20
>> --=20
>> James
>> -------
>> http://macstrac.blogspot.com/
>>=20
>> Open Source Integration
>> http://open.iona.com
>>=20
>>=20
>=20
> --=20
> View this message in context:
> =
http://www.nabble.com/spring-DeadLetterChannel-redelivery-config-tp159065=
61s22882p18312842.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>=20
>=20
>=20

--=20
View this message in context: =
http://www.nabble.com/spring-DeadLetterChannel-redelivery-config-tp159065=
61s22882p18314952.html
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