Dead Letter Channel: add onError with correspondence to onRedelivery
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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
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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