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https://issues.apache.org/jira/browse/CAMEL-4978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13214561#comment-13214561
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Claus Ibsen commented on CAMEL-4978:
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We cannot change the DSL / API in Camel 2.x as too many users depend upon it
being stable.
For Camel 3.0 we can consider tithing the API a bit to make it more clear in
some areas.
> Dead Letter Channel: add onError with correspondence to onRedelivery
> --------------------------------------------------------------------
>
> Key: CAMEL-4978
> URL: https://issues.apache.org/jira/browse/CAMEL-4978
> Project: Camel
> Issue Type: Improvement
> Components: camel-core
> Affects Versions: Future
> Reporter: Andrey Kazantsev
> Priority: Minor
> Labels: features
>
> When an error occurs there can be situation when some actions should be
> performed before next redelivery attempt. These actions can be custom logging
> (in case of Dead Letter Channel we don't have control on logger name and
> format), creating incident request in internal company system, etc.
> Current version of Dead Letter Channel provides support for specifying
> processor which is called when next redelivery attempt is performed. However,
> if delay between attempts is long, this can be too late.
> I think we can implement support for specifying processor which will be
> called when error occurs, e.g., onError property. Then this processor with
> information from provided Exchange can take appropriate actions. For example,
> it can save this message for further investigation, while Dead Letter Channel
> will keep going on redelivering it.
> If this feature is worth to be implemented, I can prepare a patch. I
> implemented a work-around in my current project using onRedelivery, but I
> don't like it because of latency in redelivery interval.
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