I’m not exactly sure what you mean here. Do you mean that you need to keep a total count of your workers? Or that each worker needs to keep an independent counter of something?
No, I mean the spawned process will do something, but only accepts more work if it is doing less than a number a things. Like a queue, if the queue of the process work exceeds certain amount, it should reject the request. And I need to keep count of the length of the queue.
The mailbox queue length is my counter.
So my options are:
- Use an agent with a registry
- Use only the registry
And now that I’m writing this, I could use Process.info(pid, :message_queue_len) before sending a message with work to the process. But then I’m not really sure how to test the genserver to see if it accepts more message after a limit. If I send unexpected messages, the test logs:
received unexpected message in handle_info/2: which is not nice
