How to register a workflow with constructor parameters?

Community Support
1

Hi,

I can’t seem to find examples of where a workflow has a constructor with parameters in Java. I have a case where I need to pass in some parameters. There are two places:

  1. Where you register the workflow
  2. Where you create the workflow via newWorkflowStub

In both cases how would you pass in the constructor parameters.

Thanks,
Derek

2

It is not supported as workflow constructor parameters can easily break workflow code determinism.

What are the parameters you are trying to pass to the workflow?

3

In my workflow, I have an activity that will publish some data to a datastore. However, when testing in dev environment (local), I want to disable this activity since it is only need to staging/prod. In this case, I want to be able to pass in a configuration or some sort of flag that will tell what environment it is.

4

I would rather mock the activity to be noop instead of changing the workflow logic.

5

This wouldn’t be in a unit test. How would you mock out the activity in the code?

6

You either register a different activity implementation with the worker based on config or let the activity implementation behave differently based on config. Passing config to an activity implementation object is fully supported.

7

If you still want to affect the workflow execution based on config then load the config through an activity or a SideEffect.