[jira] [Created] (CAMEL-6420) Custom context id for MDC logging

["Marco Zapletal (JIRA)" <ji...@apache.org>]

Marco Zapletal created CAMEL-6420:
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             Summary: Custom context id for MDC logging
                 Key: CAMEL-6420
                 URL: https://issues.apache.org/jira/browse/CAMEL-6420
             Project: Camel
          Issue Type: Wish
          Components: camel-core
            Reporter: Marco Zapletal
            Priority: Minor


The Camel MDC feature is really great. However, we would like to use our own context id (i.e., a Camel header) instead of the ones available out of the box. So far as I have seen, there are no configuration options to do so. In addition, subclassing MDCUnitOfWork is also not the appropriate way to go...
I have searched the mailing list and there have been similar requests in the past

http://camel.465427.n5.nabble.com/custom-MDC-property-td4750999.html
http://camel.465427.n5.nabble.com/custom-MDCUnitOfWork-td5730107.html

In principle, I would see two ways to go to realize such a feature:

- When configuring (activating) MDC logging on the context, there may be an additional option to define an expression, which is evaluated by the MDCUnitOfWork
- The definition of a "quasi-standard" Camel header for user defined correlation - i.e., to define a reserved header key (similar to correlationId or messageId) that can be leveraged by Camel users to set their own correlation values - maybe such a header would also be usable for other use cases as well? Users can then configure MDC logging to use this header as context id. 

I am happy to hear the thoughts of the Camel community

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