Can Zeebe DMN Worker be watching the dmn-repo folder?

Camunda 8 Topics Discussion & Questions
1

Hello,

I’m wondering if there is a setup for the Zeebe DMN Worker to be watching the dmn-repo folder in case new files have been added.

For now, I have to restart the worker every time a new DMN file is added to the dmn-repo to get it scanned, etc.

Any suggestions?
Thank you,

2

Hi @Helmet ,

this should work. The worker scan the directory if it doesn’t know a requested decision.

Instead of watching the directory, it scan the directory when it processes a job and the decision is not parsed yet.

Please check if this works as expected.

Best regards,
Philipp

3

Thank you @philipp.ossler for your feedback.

I tried these use cases, and below is the outcome:

  1. Start the Zeebe DMN Worker, Upload a new file => the scan is not triggered
  2. Start the Zeebe DMN Worker, Upload an already existing file, but with a slight change in the content (like adding a new comment to the decision table) => the scan is not triggered

According to the tests I conducted, the dmn-repo directory is scanned only when the Zeebe DMN Worker starts. It is never scanned again all along the app lifecycle.

4

That is only partially true. Yes, the worker doesn’t scan the directory again periodically.

But it scans the directory if it should evaluate a decision that was not present when it scanned the directory the last time (i.e. on startup).

So, the worker will not see if a DMN is updated in the directory.

If you need this feature then please create a feature request in the worker repository. :+1:
I’m also happy about contributions in form of a PR :rocket:

2 Likes
6