Github user gene-telligent commented on the issue:
https://github.com/apache/nifi/pull/1482
@fmaritato Hey frank! First of all, thank you so much for getting the ball
started on the GCP processors -- I didn't mean for this to seem like a snub; I
just had some spare time and pretty much did a 1:1 copy of the AWS processors
(or at least their design principles). The biggest thing was adding those
credential controllers, since it seems like that's the most appropriate pattern
for dealing with credentials.
I've made the changes to allow for Project ID being dynamic. And
unfortunately yes, for the time being, if you're using separate credentials for
different GCP processors, you'll need separate credential services. That being
said, if you're primarily using Application Default credentials, you can apply
those to multiple processors without a problem.
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