How to await for an approval for a workflow that might arrive indefinitely in the future

Community Support
1

I have a workflow will sometimes wait for an approval from a user before proceeding. This approval can occur at a point indefinitely in the future.

My concern is that this will cause a hanging thread in my program, I don’t want resource on my server to be consumed while I wait for an approval or a message from a signal channel.

After reading all the documentation, it is unclear to me if functions like .Receive() or .ReceiveAsync() will block the thread, consuming resource, or will put the workflow to sleep and just restart it when a signal is received.

I have some code that looks like this, should I be using a timer, sleep or workflow.Await() to ensure this thread doesn’t hang while it waits for channels?

for {
		var completed bool
		ok := completionChannel.ReceiveAsync(&completed)
		if !ok {
			if len(executionDAG.queuedRevisionNodes) == 0 {
				break
			}
		}
	}
2

Workflow executions that hold the threads are going to be evicted from your worker cache eventually, so executions blocked on temporal apis technically do not consume your worker resources