Support for running Rebus.GoogleCloudPubSub against local emulator

rebus-org / Rebus.GoogleCloudPubSub

:bus: Google Cloud Pub Sub transport for Rebus (under development)

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Support for running Rebus.GoogleCloudPubSub against local emulator #6

Closed torangel closed 2 years ago

torangel commented 2 years ago

Made GoogleCloudPubSubTransport respect emulator env variabables if available
Upgraded test project to dotnet6
Instructions on various ways to run tests (emulator and cloud)
Added docker-compose based test setup with no external requirements

Rebus is MIT-licensed. The code submitted in this pull request needs to carry the MIT license too. By leaving this text in, I hereby acknowledge that the code submitted in the pull request has the MIT license and can be merged with the Rebus codebase.

torangel commented 2 years ago

This to address

In all languages except for Java and C#, if you have set PUBSUB_EMULATOR_HOST as described in Setting environment variables, the Pub/Sub client libraries automatically call the API running in the local instance rather than Pub/Sub.

However, C# and Java client libraries require you to modify your code to use the emulator

https://cloud.google.com/pubsub/docs/emulator#accessing_environment_variables

mookid8000 commented 2 years ago

Cool 🙂 let me know when the PR is ready for review

torangel commented 2 years ago

Should be ready now :) Based on learnings from hosting Rebus in GCE I made two more modifications as shown in the last commits:

GOOGLE_APPLICATION__CREDENTIALS is not always injected/available as I first believed, but rather some OIDC "magic" is going on under the hood managed by the Google SDK in our instance - Therefore removed the hard depency/check on the env. variable.
Which in turn makes it difficult to "infer" the projectId from the credential - which might be a bad idea anyways. (https://stackoverflow.com/questions/55960504/how-do-i-get-projectid-from-googlecredentials)

mookid8000 commented 2 years ago

Coool! It's out as Rebus.GoogleCloudPubSub 0.0.6 on Nuget.org now 🙂

Thanks for contributing ❤️