On 22 Sep 2011, 01:19 pm, a.libran@gmail.com wrote:

I almost gave up choosing twisted until I found this explanation

http://twistedmatrix.com/pipermail/twisted- python/2004-April/007517.html

which basically says a remote_method can return a deferred. In this case, the PB server won't return the result of the Deferred back to the client until the server-side callback fires. The result of the remote_method is then returned to the client, which then triggers client side's deferred callback.

So, I thought one of the following would be helpful:

1) An example showing remote_method returning a deferred

and/or

2) A section named "Server side remote_* methods can be async by returning deferreds" could be added as a 7th item in

http://twistedmatrix.com/documents/current/core/howto/pb-usage.html

.

I spent some quality 30+ hours carefully reading 90% of the

http://twistedmatrix.com/documents/current/core/howto/index.html

and I do not remember picking this subtlety up. (Or you can point me the right place in doc.) (great doc btw.)

Should I submit an improvement ticket for this? I could also make the server side example using Echoer, remote_echo, and deferToThread just so that whoever fixes the ticket can just copy and paste.

It looks like there is actually a ticket for this issue: http://twistedmatrix.com/trac/ticket/2555 with some work invested in resolving it. Anyone care to pick up where the previous developer left off? Jean-Paul