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Message from discussion Using greenlets in 2 separate threads
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Viatcheslav Gachkaylo  
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 More options Nov 1 2012, 7:13 am
From: Viatcheslav Gachkaylo <vgachka...@crystalnix.com>
Date: Thu, 1 Nov 2012 18:12:49 +0600
Local: Thurs, Nov 1 2012 8:12 am
Subject: Re: [gevent] Using greenlets in 2 separate threads
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Hello, AM

In the end I decided to use multiprocessing to launch 2 separate processes with Pipe communication.

Thanks for your answer,
Viatcheslav Gachkaylo
Crystalnix

On Oct 31, 2012, at 10:01 PM, AM wrote:

> On 10/30/2012 11:25 PM, Viatcheslav Gachkaylo wrote:
>> Hello,

>> I need to run 2 servers communicating with each other in a single process. One uses gevent event loop, the other one uses tornado.
>> Now I run the 2nd server in a separate threading.Thread. However I wish to use greenlets in the code of this second server. Will this cause any troubles?
>> What is a simple yet effective alternative in this situation? How hard it is to make tornado use gevent and unite the servers' run loops together?
>> I don't think dividing into 2 different processes with a proper communication between them is an appropriate solution.

>> The first server is gevent.wsgi.WSGIServer, the second one is https://github.com/thisismedium/python-xmpp-server/

>> --
>> Thank you,
>> Viatcheslav Gachkaylo
>> Crystalnix

> Hi Vitaly.

> If you want to run two servers in the same process, simply start the servers using start (not serve_forever) and wait on the two greenlet objects you get back. You will have to take care that when one of them terminates the other one terminates too, or else you may end up with only one server running.

> Re: tornado, it uses its own event loop based around the same apis that gevent uses but at a much lower level. In theory you might be able to make it work with greenlets, but you may end up recreating gevent :)

> I am wondering why two processes are not a good model?

> HTH
> AM


 
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