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From Claus Ibsen <claus.ib...@gmail.com>
Subject Re: Loosing headers by using errorHandler and useOriginalMessage() in camel.jms
Date Thu, 30 Sep 2010 04:17:50 GMT
This will be fixed in Camel 3.0 when we work on some internals in Camel.


On Wed, Sep 29, 2010 at 11:00 PM, Christian Mueller
<christian.mueller@gmail.com> wrote:
>
> Hello list,
>
> we are using camel-jms in conjunction with custom headers and the
> useOriginalMessage() definition in our error handler for our exception
> handling. We realized, that we loose all our headers in our dead letter
> channel (using Camel 2.2.0.fuse-02-00). Our configuration looks like this
> one:
>
> errorHandler(
>    deadLetterChannel("jms:queue:dead")
>    .useOriginalMessage());
>
> from("jms:queue:foo")
> .processRef("allwaysThrowExceptionProcessor")
> .to("jms:queue:bar");
>
> We digg this problem down to the DefaultUnitOfWork [1], which doesn't copy
> the headers if the message is a JmsMessage. The documentation says:
> //cannot copy headers with a JmsMessage as the underlying javax.jms.Message
> object goes nuts
>
> Two line above, the java doc also says:
> // TODO: the copy on facade strategy will help us here in the future
> // TODO: optimize to only copy original message if enabled to do so in the
> route
> // special for JmsMessage as it can cause it to loose headers later.
> // This will be resolved when we get the message facade with copy on write
> implemented
>
> I have two questions:
> 1) How we can prevent or work around this (copy the original message into a
> custom header and do not use useOriginalMessage(). And restore the original
> message in the error flow from this custom header)?
> 2) When do you plan to fix this as the java doc suggests?
>
>
> [1]
> http://svn.apache.org/viewvc/camel/trunk/camel-core/src/main/java/org/apache/camel/impl/DefaultUnitOfWork.java?view=markup
>
> Cheers,
> Christian
>
> --
> View this message in context: http://camel.465427.n5.nabble.com/Loosing-headers-by-using-errorHandler-and-useOriginalMessage-in-camel-jms-tp3046234p3046234.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

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