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Re: Distributed FIFO queues?

by john_oshea (Priest)
on Aug 21, 2007 at 10:42 UTC ( #634048=note: print w/replies, xml ) Need Help??


in reply to Distributed FIFO queues?

A bit of a late reply, but you may find xmlBlaster worth a look - it seems to be in the rough ballpark, speed-wise (672 messages/s in 'acknowledge each message' mode, a couple of thousand/s in bulk mode) and has bindings for multiple languages ("PHP, Perl, Python, C, C++, C#, Visual Basic.net, Flash, J2ME, Java client samples are delivered in the xmlBlaster distribution.").

I've no idea how good it may prove - it's in my "could come in handy at some point" list - hope that helps.

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[ambrus]: what push_write thing? I don't think you need that. that's implemented generically by AnyEvent::Handle
[Corion]: ambrus: Yeah, that's what I think as well. But you give me an idea, maybe I should start with implementing the timer, as that should be far simpler and with fewer edge-cases/nasty interaction than the file watcher
[ambrus]: You only provide the watcher part that tells when the handle is readable or writable, not the actual writing and reading.
[Corion]: ambrus: Hmmm. It makes sense that AnyEvent would implement the push_write itself, but I think I don't have a good idea of where the boundary between AnyEvent and the underlying event system lies... Implementing the timer should give me a better idea
[ambrus]: Corion: push_write is in the higher level abstraction of AnyEvent::Handle, not in the watcher
[Corion]: ambrus: Hmm - rereading Prima::File, that merrily coincides with what Prima does - it tells you "you can read", and you're supposed to read from the fh yourself. I thought it called you with the data already read, which would've been harder to integrate
[ambrus]: you just need an io watcher, created by &AnyEvent::Impl:: Whatever::io(...)
[Corion]: So after talking it through with you even while I'm still not entirely clear on where AE ends and my implementation begins, I think I understand that I only need to implement some smaller parts for each functionality I want to support.
[Corion]: Yeah... and you might even be able to mix and match additional functionality if you have additional async suppliers, like from a separate thread
[ambrus]: You hvae to be careful with the timer, because apparently Prima::Timer insists on being periodic, wheras AnyEvent::Impl:: Whatever::timer should give a one-shot timer watcher

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