callback on reserve

[Iain C Docherty]

I want to communicate to a websocket server (written in Perl) also via a beanstalk queue. However if I use the blocking reserve command then it will not respond to web-socket calls.

I could poll the reserve queue periodically but this is not ideal.

Ideally I would like to implement a callback, but all my searching (both in Google and in this group) brings up nothing.

Any suggestions on how to implement this cleanly?

Kind Regards

Iain

[Scott Wiersdorf]

I think the only option you have is reserve-with-timeout, but you can set the timeout to be 0s so that it won't block your event loop (I don't know if reserve-with-timeout accepts fractional seconds—try it). You may have to handle the "TIMED_OUT" or "DEADLINE_SOON" responses, so be sure to check for those (depending on what client you're using).

Scott

[Nigel Gregoire]

Hello!

I'm not sure what event loop you're using, but you could try
https://metacpan.org/pod/AnyEvent::Beanstalk .

Sample code: http://pastebitch.com/HeQF?perl

That said, we have some event loops at work using reserve-with-timeout
with a timeout of zero, and that's worked fine for us.

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Nigel

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[Iain C Docherty]

Thank you both for those suggestions.

As is often the case, having posted the question, the answer almost immediately is found!

The solution in this case (which I took time to verify) is to use the Perl module AnyEvent::Beanstalk

Kind Regards

Iain