Resuming workflows - how?

[thomasdv]

Hi there,

I'm playing with workflows (using nodes basically as wrappers for specialized chat agents) and I'm having trouble understanding the proper way to handle workflow resumption. The documentation is not very clear on this subject.

As far as I understand it, everytime I receive a message from user, I need to initialize the workflow using:

$workflow = new Workflow (
    new FilePersistence("/path/to/directory/"),
    $threadId // or any other workflow ID
);

And then:

• New workflows should be started using $workflow->run($freshlyCreatedState)
• Interrupted workflows should be resumed using $workflow->resume($responseToInterruption)

However, I can't find a simple way to determine whether the current workflow (with a specific ID) is currently in an interrupted state or if it's a fresh workflow that needs to be started from scratch.

Am I missing something? Thanks!

[ilvalerione]

HI @thomasdv, I don't clearly understand the problem. After collecting the external feedback you need to call the resume method, otherwise the workflow is simply starting. It's on your application to submit the interruption feedback.

[thomasdv]

Hi @ilvalerione, thanks, could do that. The app would have to know wheter it is responding to interruption or not.

My thinking was:

• receive message from user
• check if there is a saved state for a given workflowId (file exists)
• if so resume() with message, otherwise create state and run()

Would make things a bit easier.

[ilvalerione]

I don't know what you are trying to implement, but you should know if the user message is a feedback for an interrupted workflow, or it's just the first interaction. I'm assuming that first running and resuming are two distinct application flows, but again, I don't know your use case.