The quick answer is 5 :)
You're absolutely correct in looking for listen(), but you're looking
in the wrong place.
The dev_appserver runs the BaseHTTPServer from the Python standard
library. The BaseHTTPServer from the stdlib runs the
SocketServer.TCPServer from the SocketServer in the stdlib. And... it
looks like the TCPServer defaults to a listen backlog of 5 :)
(see BaseHTTPServer.py and SocketServer.py in your Python distribution
for all the gritty details, along with google/appengine/tools/
dev_appserver.py in your App Engine SDK kit)
On Apr 6, 7:10 pm, Khai <khaitd...@gmail.com> wrote:
> This is regarding the development server (dev_appserver.py or SDK). I
> am inquiring on this because I am developing an opensocial application
> which makes three asynchronous requests, but one of them fail
> (randomly). I know that the development server is single-threaded.
> I've started another discussion on how to run the development server
> as a mod_python script (but haven't got enough discussion yet).
>
> I am a novice python user. I've look python documentation on socket
> programming. It uses the listen(). I've look up the manual page for
> listen() with "man 2 listen", and it signature is:
>
> int listen(int sockfd, int backlog);
>
> I've grep the development SDK source for 'listen(' but did not find
> it. I am confused. Is the listen() system call being used at all? I
> am running dev_appserver.py on Linux. Please guide me in the right
> direction.
>
> Thanks
> Khai
>
> On Apr 4, 4:40 pm, Tim Hoffman <zutes...@gmail.com> wrote:
>
>
>
> > Hi
>
> > You really need to read up on the architecture of App Engine, remember
> > app engine is a long way from the server. It is not a server like
> > apache in it's own right.
>
> > As far you and your application is concerned there is no such thing,
> > Any pending connections will be handled in googles infrastructure and
> > is more than likely going to end up with a new instance starting up.
>
> > What would you hope to learn from such a thing if it was available and
> > what could
> > you do with the knowledge.
>
> > Rgds
>
> > Tim
>
> > On Apr 5, 5:18 am,Khai<khaitd...@gmail.com> wrote:
>
> > > With Apache we can configure the maximum length of the queue of
> > > pending connections using it's ListenBackLog directive
> > > (http://httpd.apache.org/docs/2.0/mod/mpm_common.html#listenbacklog).
>
> > > Can anyone with knowledge of the SDK internals please let me know the
> > > default maximum length of the queue of pending connections (this
> > > would save me some time from having to dig through the source code)?
> > > Can we make this a configurable command-line option?
>
> > > Any responses would be appreciated.
>
> > > Thanks
> > >Khai
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