GitHub user HeartSaVioR opened a pull request:
https://github.com/apache/storm/pull/1663
STORM-2072 Add map, flatMap with different outputs (T->V) in Trident
* Introduce overloading methods of map and flatMap
* Now users can specify new output fields which replace origin fields
* Introduce OperationMapFunction and OperationFlatMapFunction
* which also extends Operation
* Trident will automatically determine this and handle properly
Also updated example code and docs page.
This change is needed for optimizing Storm SQL on Trident mode to have
minimized steps.
I'll work on optimization on top of this and submit that as well.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/HeartSaVioR/storm STORM-2072
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/storm/pull/1663.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1663
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commit 07c5cef073c4dc58770c8ccf19cb7a0b8d6ca333
Author: Jungtaek Lim <[email protected]>
Date: 2016-08-31T04:16:46Z
STORM-2072 Add map, flatMap with different outputs (T->V) in Trident
* Introduce overloading methods of map and flatMap
* Now users can specify new output fields which replace origin fields
* Introduce OperationMapFunction and OperationFlatMapFunction
* which also extends Operation
* Trident will automatically determine this and handle properly
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