question Re: Nifi: Context Parameter usage in Support Questions

Nifi: Context Parameter usage

Absolute_Z — Thu, 12 Jan 2023 18:14:41 GMT

Hello

I'm trying to implement an automation process to instanciate a nifi cluster and I have a problem with Context Parameters.

Using the nifi REST API with curl commands (or python scripts), I have found how to create a context parameter, how to populate it with parameters, how to bound it to a process group, but I do not find how to unbind it from a processor group (like if I want to reset the "Process Group Parameter Context" of the processor group configuration window scrolling menu to "No parameter context")

I meen it is possible (it is possible using the GUI)

Does anyone have any idea how to do this.
Thanks

Best regards,
Absolute Z

Re: Nifi: Context Parameter usage

MattWho — Thu, 12 Jan 2023 20:52:22 GMT

@Absolute_Z
You can use the NiFi rest-api to set the parameter context on a NiFi Process Group (PG) back to "No Parameter Context".

Example:

curl 'http://<nifi hostname>:<nifi port>/nifi-api/process-groups/<PG UUID>' -X 'PUT' -H 'Content-Type: application/json' --data-raw '{"revision":{"clientId":"a723bd7b-0185-1000-efb1-be534ab7a455","version":1},"disconnectedNodeAcknowledged":false,"component":{"id":"<PG UUID>","name":"<PG name>","comments":"","parameterContext":{"id":null},"flowfileConcurrency":"UNBOUNDED","flowfileOutboundPolicy":"STREAM_WHEN_AVAILABLE","defaultFlowFileExpiration":"0 sec","defaultBackPressureObjectThreshold":"10000","defaultBackPressureDataSizeThreshold":"1 GB"}}'

You'll notice in the data passed I have "parameterContext":{"id":null} which will clear all set parameter contexts on the specified Process Group.

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Thank you,

Matt

Re: Nifi: Context Parameter usage

Absolute_Z — Thu, 19 Jan 2023 15:35:33 GMT

Hello,
Thank you Matt for your quick response (and sorry for my late response).

It work perfectly.

Best Regards