Blocking behaviour

[jarodriguez-itsoft]

First of all, congrats on the library, finally a library which address fairness ;)

I have reviewed the documentation and I miss a very helpful -and needed in my specific case- feature: being able to perform a blocking ask.

If I'm not wrong, if there is no quota left, the ask function inmediately returns an error with the root cause.
Instead of returning and error, I propose an additional option to the ask function to block until there is another available slot for the requester.
In another rate limiting libraries, an additional setting allows to set a limit on how many simultaneous blocked requests can be waiting, and default to deny requests if that limit is reached and a new request is made.

At the end this behaviour is equivalent to allow reserving slots in advance.

[g-andrade]

First of all, congrats on the library, finally a library which address fairness ;)

Thank you!

I propose an additional option to the ask function to block until there is another available slot for the requester.

It's an interesting feature, and it had occurred to me in the past. Perhaps sbroker could be used to broker requests between the category process and the consumers.

I'll leave this issue open as a reminder.