[Twisted-Python] Released Ampoule - 0.0.5

[Don Smith]

Hmm, this sounds interesting. I'm wondering about a use case for it. Would
Ampoule be a way to take advantage of multi-core processors?

Thanks,

Don

On Wed, Nov 12, 2008 at 12:09 PM, Valentino Volonghi <dialtone at gmail.com>wrote:

> Ampoule is a process pool implementation written on top of Twisted
> Matrix. Its name comes from the use of AMP as the default
> communication protocol between the pool and all its children.
>
> It's different from other alternative solutions because it provides an
> API very close to that of the Twisted ThreadPool. As an helper
> function it also provides a deferToAMPProcess function that creates
> the ProcessPool and submits jobs to it.
>
> There has been 2 released since the last announce so I'm going
> to report both of them here.
>
> Ampoule 0.0.5 (2008-11-12)
> ==========================
>
> Changes
> --------
>  - Fixed bug #259264, this fix introduces a number of changes in the
>    architecture of the project:
>     1. Removed childReactor argument form the process pool and added
>        a starter argument.
>     2. Introduced the concept of a starter object whose role is to
>        start subprocesses with given parameters. This makes it easier
>        to specify particular parameters (eg. new env variables) to the
>        child processes without needing to override many methods in the
>        pool using closures.
>     3. main.py is completely changed and now provides the ProcessStarter
>        object which is a default implementation of IStarter.
>     4. IStarter interface currently documents only 2 methods:
>             startAMPProcess
>             startPythonProcess
>         in the future it's possible that we will add an additional:
>             startProcess
>         that starts whichever process we want without requiring python,
>         also this might end up with the separation of ProcessPool in at
>         least 2 logical levels: the ProcessPool and a dispatcher that
>         talks with the children, in this way it would be possible to
>         create custom ProcessPools without changing much code or requiring
>         any special requirement on the children.
>
>  - Introduced a callRemote method on the ProcessPool that is basically
>    the same as doWork. Introduced for symmetry between all the RPC
> libraries
>    in Twisted.
>
>  - reactor short name and ampoule child class are now passed as the 2
>    last arguments rather than the first 2. So if you have written any
>    custom bootstrap code be sure to change sys.argv[1] and sys.argv[2]
>    into sys.argv[-2] and sys.argv[-1] respectively.
>
> Ampoule 0.0.4 (2008-11-03)
> ==========================
>
> Changes
> --------
>  - Ampoule parent process and child processes now talk using FDs 3 (in)
>    and 4 (out) in order to avoid problems with libraries that mistakenly
>    send error lines to stdout (yes, I'm looking at you gtk+)
>
>
> --
> Valentino Volonghi aka Dialtone
> Now running MacOS X 10.5
> Home Page: http://www.twisted.it
> http://www.adroll.com
>
>
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