Re: Question about asyncio and blocking operations

From	"Frank Millman" <frank@chagford.com>
Newsgroups	comp.lang.python
Subject	Re: Question about asyncio and blocking operations
Date	2016-01-28 11:13 +0200
Message-ID	<mailman.45.1453972447.2338.python-list@python.org> (permalink)
References	(2 earlier) <CALwzidk-RBkB-vi6CgcEeoFHQrsoTFvqX9MqzDD=rnY5bOCRUg@mail.gmail.com> <n8aln3$fah$1@ger.gmane.org> <CALwzidn6TvN9W-2qnn2JYvJu8NHzn499nPtfjn9OHjdDcebVbA@mail.gmail.com> <CALwzidmmUeL3Sq9o6ZgKYM3-V22HCshG03wQqsXvhh6xy1otgQ@mail.gmail.com> <CALwzidkr-fT6S6wH2caNaxyQvUdAw=x7XDqkqOfNRrwzwnjvOQ@mail.gmail.com>

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"Ian Kelly"  wrote in message 
news:CALwzidkr-fT6S6wH2caNaxyQvUdAw=x7XDqkqOfNRrwzwnjvOQ@mail.gmail.com...
>
> On Wed, Jan 27, 2016 at 10:14 AM, Ian Kelly <ian.g.kelly@gmail.com> wrote:
> > Unfortunately this doesn't actually work at present.
> > EventLoop.run_in_executor swallows the StopIteration exception and
> > just returns None, which I assume is a bug.
>
> http://bugs.python.org/issue26221
>

Thanks for that. Fascinating discussion between you and GvR.

Reading it gave me an idea.

Run the database handler in a separate thread. Use a queue.Queue to send 
requests to the handler. Use an asyncio.Queue to send results back to the 
caller, which can call 'await q.get()'.

I ran a quick test and it seems to work. What do you think?

Frank

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Re: Question about asyncio and blocking operations "Frank Millman" <frank@chagford.com> - 2016-01-28 11:13 +0200

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