How to send an exception or other "error" response from an Activity to its Workflow #164
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For anyone else with a similar question: I haven't been able to find a way to allow an exception to be thrown from an Activity and caught in a Workflow. I now return an object from the Activity, and the object has a property called |
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Nevermind. I can't return an exception (even as a property of an object) because of issues serializing the exception. I am still looking for a good solution here. |
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@travisaustin You could transform the exception to a plain object like this: |
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@travisaustin Have you taken a look at https://laravel-workflow.com/docs/failures-and-recovery#handling-exceptions the only way to get an exception to throw from an activity is for it to run out of tries. This isn't currently supported for child workflows, only activities. I'll do some research into adding that. |
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This comment was VERY helpful. My trouble all boils down to the fact that you can't throw an exception from an activity that's within a child workflow. Thanks for identifying the issue. I saw the documentation about Sagas and couldn't replicate the code because I was triggering the exception from an activity in a child workflow. |
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For sake of example, let's say we have a Workflow
UserRegistration. That workflow triggers a child workflowGetOrCreateRemoteUser, and that child workflow has a few activities to interact with a remote API.In the event that the remote API returns an error, I want to pass that error back to the
UserRegistrationworkflow to be handled.What's the best way for the Activity, started from a ChildWorkflow inside a Workflow, can send an exception or other "error" response back to the Workflow?
I tried throwing an Exception in the Activity. By default, an exception causes the Activity to retry forever (with backoff). If I set
$triesor$maxExceptionsto 1 on the Activity class, throwing an exception causes the Activity to fail, but I can't seem to configure anything in the workflow to intercept the exception.I have considered using a special return variable in the activity, but it's starting to get convoluted (lots of checks for success after each step in the Workflow).
What's the best way to throw an Exception (or similar) in an Activity and have it bubble all the way back to the parent Workflow?
Thanks!
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