GitHub user YolandaMDavis opened a pull request:
https://github.com/apache/nifi/pull/564
NIFI-2020 - Enhance JoltTransformJSON processor to support custom transforms
This is the initial commit to enhance the JoltTransformJSON processor by
providing the ability to support custom transformations via drop in
jars/libraries.
The below describes the rules behind this enhancement:
**Case #1 â Custom Transform Selected**
In this case if the Custom option of Transform DSL is selected then 1) a
Custom Transform Class Name should be entered and 2) one or more module paths
should be provided. The Custom Transform Class Name should be a **fully
qualified classname** (e.g. eu.zacheusz.jolt.date.Dater). The Module Path can
take a comma delimited list of directory locations or one or more jar files.
Once these fields are populated the Advanced view will support validation and
saving of the specification. **A user can switch between transformation types
in the UI but not custom class names & module paths.**
**Case #2 â Chain Transformation Selected with Custom Transformations
embedded**
In this case if a user wants to use one or more transforms (that include
custom transformations) in their specification then the Chainr spec option can
be used with one or more module path provides. **In this case the Custom
Transform Class Name property is not required and would be ignored (since one
or more custom transformations could be invoked in the spec).** As in Case #1
the Advanced view will support validation and saving of specification if the
required fields are populated for this case.
To aid in testing, the Jolt Date custom transformation project can be used:
[](https://github.com/zacheusz/jolt-date)
A jar file can be built from this project and used for testing
Also a readme file with example specification for jolt-date is attached
along with snapshots of configuration setup and execution.
[README.txt](https://github.com/apache/nifi/files/329176/README.txt)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/YolandaMDavis/nifi NIFI-2020-master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/nifi/pull/564.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 #564
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commit 6daa9df25490f5f07b23293e752e947394af42e7
Author: Yolanda M. Davis <[email protected]>
Date: 2016-06-23T02:26:16Z
NIFI-2020 - initial commit for custom transformation support
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