Hello,
In our application, we have factored out some common behaviour in a direct:
route called synchronously by other routes
This sub-route needs to handle exception by first making retries ; and
then, when retry are exhausted, by returning **to the caller route** a
default intermediary response.
Playing around with onException directive on this direct sub-route, I did
not succeed to achieve the last part :
* the retries do work correctly ( with required redelivery policy
directive : maximumRedeliveries in particular )
* when retries are exhausted the custom exception policy is correctly
executed : it marks the exception as "handled" and set the body on the
exchange with the default intermediary response
* BUT the processing of the exchange completely ends after that : the
parent route didn't continue its processing based on this intermediary
response
* and in the ends the caller of the main route receives an intermediary
response, which is not in the format it expects.
I know there is doTry/doCatch directives, which would allow to return a
default response without involing errorHandler, but we can't use them here
as we also do need the redelivery behaviour of the default error handler.
Digging a little into the camel source code, I understand that this
behaviour is caused by the fact that both routes (main route / sub-route)
are sharing the same Exchange when using direct: endpoint,
and that in this case, the error handler of the sub-route flags the
Exchange has errorHandlerHandled which caused BOTH routes to stop their
processing.
I didn't succeed to find reference material on this specific behaviour on
direct endpoint.
It seems to me to be a fairly reasonable requirement though.
Is it possible to achieve what we need here ?
Thanks in advance for your advices
Regards,
Fabien Arrault
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