Adding custom mapper for json processing exception

[himank]

Custom exception mapper to return bad request instead of returning 500.

[xvrl]

missing newline

[himank]

I'll add it thanks

[himank]

Updated the pull request with customizing JsonMappingException instead of JsonProcessingException as the former one is more appropriate for problems related to mapping content. Before/After output is below.

https://gist.github.com/himank/2bf076ab0b3b5c93c038

[fjy]

Thanks for the contrib @himank. Will try to review shortly

[himank]

@fjy Thanks :)

[himank]

@fjy If you get chance could you please review it, Thanks in advance.

[drcrallen]

other places use "error" lower case

[drcrallen]

also should probably be exception.getMessage() == null ? "unknown json mapping exception" : exception.getMessage() or similar

[drcrallen]

👍 after minor comments

[drcrallen]

Thanks for the contrib @himank . Could you please fill out the CLA at http://druid.io/community/cla.html ?

[himank]

@drcrallen Thanks for the review, updated as per your comments. Please review when you get chance :)

[fjy]

👍

[fjy]

@himank do you mind following the steps here? https://groups.google.com/forum/#!topic/druid-development/1Zs3Vd9LHCQ so your contribution will be counted :)