[rabbitmq-discuss] Using BlockingConnection in Pika

Joshua Braegger rckclmbr at gmail.com
Tue Jul 5 23:54:17 BST 2011

Perfect, that will work great.  Thanks a lot Gavin and Jason.


On Tue, Jul 5, 2011 at 3:19 PM, Gavin M. Roy <gmr at myyearbook.com> wrote:

> On Tue, Jul 5, 2011 at 5:04 PM, Joshua Braegger <rckclmbr at gmail.com>
> wrote:
> > Thanks, Jason.
> > I bring this up because of this comment
> > --
> http://tonyg.github.com/pika/connecting.html#adapters-blocking-connection-blockingconnection
> > "Warning BlockingConnection is provided for legacy and learning purposes
> > only and it is not recommended that you use it for a production
> > application."
> > The latest git documentation also still has this warning
> > (
> https://github.com/pika/pika/blob/master/pika/adapters/base_connection.py)
> > "adapters.blocking_connection.BlockingConnection: Enables blocking,
> >
> >   synchronous operation on top of library for simple uses. This is not
> >   recommended and is included for legacy reasons only."
> >
> > So my question is, why isn't this recommended for production use?
> In essence, you can but the main issue is it's a synchronous "hack" on
> top of an asynchronous stack using an asynchronous protocol. I am
> working on a revamped method of handling the blocking but it's taking
> a bit longer than I'd like.
> The best way to think of the BlockingConnection adapter is as a layer
> on top of the existing client that implements blocking behaviors.
> Every other adapter plugs into the driver.
> At the time I wrote that it was deprecated, I wasn't planning on
> keeping it long term. My impression of it and how to handle it has
> changed over time. Here's where I was in March:
> http://gavinroy.com/the-future-of-pika.
> I'd say you're fine using it if it works for you. I find that it's
> good for publishing a lot of messages quickly. If you're going to use
> it as a consumer, you're better off just doing the minimal work of
> using the asynchronous methods because you'll be working with the
> asynchronous callback in the blocking connection anyway. I'll be
> supporting bug fixes in the 0.9 tree but my focus on Pika and heart is
> in a cleaner implementation.
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