[Twisted-Python] How does Twisted handle multiple request at the same time ?

[abhishek unnikrishnan]

thank you Laurens Van Houtven.  This was helpful and i am moving onto
json-rpc for my projcet


On Thu, May 23, 2013 at 2:03 PM, Laurens Van Houtven <_ at lvh.io> wrote:

> On Thu, May 23, 2013 at 9:46 AM, abhishek unnikrishnan <
> thecreator232 at gmail.com> wrote:
>
>> hi guys
>>
>
> Hi Abhishek!
>
>
>> i'm new to twisted and asynchronous programming . i have created a rpc
>> server using twisted and xmlrpc packages . i wanted to know what will
>> happen if two or more clients give an rpc call at the same time. how will
>> the server handle this situation.
>>
>
> The tricky part is in the "at the same time". Twisted's reactor thread
> only does one thing at a time, and that's okay: both connections get
> accepted and some data gets read from them (and eventually written to
> them). The important part is that you do these things non-blockingly (or,
> synonymously, asynchronously): it's okay to only do one thing at a time as
> long as each thing you do takes very little time. The second connection
> doesn't have to wait long before the connection gets opened and data gets
> read, because the operations that happen before it don't take long.
>
> This pattern repeats throughout asynchronous programming: it's okay to
> only decode one bit of JSON at a time, as long as doing that doesn't take a
> long time (i.e. block), preventing anything else from happening in the
> immediate future.
>
> Does that clarify things?
>
> and also wanted to know is there a way for the server to call the client
>> in an rpc scenario .
>>
>
> That depends on your RPC protocol. Many allow this (often called peer to
> peer), many are explicitly client-server and only allow one-way calls. Even
> protocols that do support full-duplex communication don't necessarily have
> clients that can take method calls very often.
>
> AMP, my personal favorite, explicitly supports two-way RPC. It comes with
> twisted, and you can read about it here: http://amp-protocol.net/
>
> Alternatively, I think JSON-RPC is full-duplex too.
>
>
> cheers
> lvh
>
> _______________________________________________
> Twisted-Python mailing list
> Twisted-Python at twistedmatrix.com
> http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: </pipermail/twisted-python/attachments/20130523/a6cc6fe3/attachment.html>