Feature request: rate limited queue

[rjack]

Hi,

when using web services usually we must respect some rate limits.

Examples:

• max 10000 hits per day
• no more than 5 hits per minute
• minimum 500ms between hits
• ...

It would be nice to have a queue that is configurable with these rules, then one would just add jobs being sure that the web service's limits will be respected.

Does it smake sense?
Is this something that would be nice to have in async or it would be better implemented in a separate module?

Cheers,
Giacomo

[peritus]

if (condition_met) {
  q.push(task(req));
} else {
  tell_user_we_are_sorry(req);
}

should do the trick, or am I missing something ?

[brianmaissy]

I suggest this be closed

[caolan]

For simple cases there's the throttle function in underscore.js, but for actual production use accessing an API having the async module keep track of API calls in memory wouldn't scale to multiple processes, so I think it would be limited in application. I don't think we should look to include this in async at the moment.