Cemre Mengu created NIFI-9561:
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Summary: Apply (Handlebars) Template Processor
Key: NIFI-9561
URL: https://issues.apache.org/jira/browse/NIFI-9561
Project: Apache NiFi
Issue Type: Wish
Reporter: Cemre Mengu
Attachments: image-2022-01-11-13-50-47-295.png
Recently, I was trying to to create json/xml payloads from attributes to be
used as requests. In most of the cases I had a template request to be filled
with attributes. However, the easies way I could find was to use ReplaceText
multiple times for individual replacements and for a large payload I had a long
line of ReplaceText processors (as shown)
!image-2022-01-11-13-50-47-295.png!
When there isnt a template for request this can be done sub-optimally (I think)
with AttributesToJson or JoltTransform processors (as discussed here
https://stackoverflow.com/questions/50415016/nifi-atttributes-to-json-not-able-to-generate-the-required-json-from-an-attr)
I would like to propose a new processor called ApplyTemplate where the
processor simply applies matching attributes to the provided template string.
In terms of java this will be something like:
Handlebars handlebars = new Handlebars(); Template template =
handlebars.compileInline("Hello \{{this}}!");
System.out.println(template.apply("Handlebars.java")
using [https://github.com/jknack/handlebars.java]
This processor will dramatically simplify most of the tasks and the
implementation is very simple. If this is something you would consider adding
to core, I am ready to provide and work on the PR.
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