Autobahn WAMP-RPC server without Twisted

[Matthias K.]

Is it possible to implement a WAMP-RPC server without the Twisted framework?

If yes - is there any small example?

If no - are the minimal dependencies of Twisted modules documented anywhere?

Many thanks,

Matthias

[Matthias K.]

I forgot to clarify that I want to leverage Autobahn.Python.

Thanks for any advice,

Matthias

[Tobias Oberstein]

Matthias,

Am 16.07.2014 17:33, schrieb 'Matthias K.' via Autobahn:
> Is it possible to implement a WAMP-RPC server without the Twisted framework?

Not sure what "WAMP-RPC server" refers to here.

There are WAMP _application components_ (class ApplicationSession).

You can write those on Twisted or asyncio. Both are supported.

E.g. for the latter, have a look at the examples below this folder

https://github.com/tavendo/AutobahnPython/tree/master/examples/asyncio/wamp/basic

like this one

https://github.com/tavendo/AutobahnPython/blob/master/examples/asyncio/wamp/basic/rpc/arguments/frontend.py

This is where application code resides.

Now, to run a WAMP system, you need a WAMP _router_ - a generic piece
that does not contain application code.

You can use a full featured, packaged router like Crossbar.io. In this
case, all you need is to connect your app component to the router as a
client. Here is an example:

https://github.com/tavendo/AutobahnPython/blob/master/examples/asyncio/wamp/beginner/client.py

Or you can roll your own router using AutobahnPython and the building
blocks included there. And these building blocks are also available for
aswyncio, e.g.

https://github.com/tavendo/AutobahnPython/blob/master/examples/asyncio/wamp/beginner/server.py

Hope this helps,
/Tobias

> If yes - is there any small example?
> If no - are the minimal dependencies of Twisted modules documented anywhere?
>
> Many thanks,
>
> Matthias
>

> --
> You received this message because you are subscribed to the Google
> Groups "Autobahn" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to autobahnws+...@googlegroups.com
> <mailto:autobahnws+...@googlegroups.com>.
> To post to this group, send email to autob...@googlegroups.com
> <mailto:autob...@googlegroups.com>.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/autobahnws/aedbee3c-461f-4050-83f0-3b9e9dee315c%40googlegroups.com
> <https://groups.google.com/d/msgid/autobahnws/aedbee3c-461f-4050-83f0-3b9e9dee315c%40googlegroups.com?utm_medium=email&utm_source=footer>.
> For more options, visit https://groups.google.com/d/optout.

[Matthias K.]

Hello Tobias,

Vielen Dank für Ihre Antwort.

Perhaps something more about my motivation:

We have a desktop application built on Python and .NET.

This application can spawn multiple processes - browser based presentations among them.

To establish interprocess communication I want to leverage Autobahn WAMP-RPC technology.

Since it is an application we distribute I would prefer a server implemented in Python. 

Twisted would considerably increase the size of the installation package so I would like to avoid it.

In your example from https://github.com/tavendo/AutobahnPython/blob/master/examples/asyncio/wamp/beginner/server.py 

Broker from autobahn.wamp.broker is imported.

broker.py does contain line 21: from twisted.internet.defer import maybeDeferred

Is there anything I can do to avoid this import?

Thanks again for any hint,

Matthias

[Tobias Oberstein]

Am 17.07.2014 16:11, schrieb 'Matthias K.' via Autobahn:
> Hello Tobias,
>
> Vielen Dank für Ihre Antwort.
>
> Perhaps something more about my motivation:
> We have a desktop application built on Python and .NET.
> This application can spawn multiple processes - browser based
> presentations among them.
> To establish interprocess communication I want to leverage Autobahn
> WAMP-RPC technology.
> Since it is an application we distribute I would prefer a server
> implemented in Python.
> Twisted would considerably increase the size of the installation package
> so I would like to avoid it.

So you want to embed the router within the application that you distribute?

And the router only connects application components running locally?

>
> In your example from
> https://github.com/tavendo/AutobahnPython/blob/master/examples/asyncio/wamp/beginner/server.py
> <https://github.com/tavendo/AutobahnPython/blob/master/examples/asyncio/wamp/beginner/server.py>
>
> Broker from autobahn.wamp.broker is imported.
> broker.py does contain line 21: from twisted.internet.defer import
> maybeDeferred
> Is there anything I can do to avoid this import?

Yes, please file an issue;)

It seems this regression was introduced with the latest release
(0.8.11). Should work with 0.8.10.

We need to use network framework specific mixins there.

/Tobias

>
> Thanks again for any hint,
>
> Matthias
>

> --
> You received this message because you are subscribed to the Google
> Groups "Autobahn" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to autobahnws+...@googlegroups.com
> <mailto:autobahnws+...@googlegroups.com>.
> To post to this group, send email to autob...@googlegroups.com
> <mailto:autob...@googlegroups.com>.
> To view this discussion on the web visit

> https://groups.google.com/d/msgid/autobahnws/17615a40-2bdb-4925-9abb-eb72828d41e3%40googlegroups.com
> <https://groups.google.com/d/msgid/autobahnws/17615a40-2bdb-4925-9abb-eb72828d41e3%40googlegroups.com?utm_medium=email&utm_source=footer>.

[Matthias K.]

Hello Tobias,

Yes, I want to embed the router but the application components don't have to necessarily run locally.

With version 0.8.10 the "beginner" example runs fine - WAMP ant its implemetation is really cool and useful stuff.

Especially when you consider HTML/JS components.

Some hints:

import trollius as asyncio prevents from asyncio.x import y

For trollius you have to replace yield from ... with yield trollius.From(...)

Thanks again for your help (and the software ...)

Matthias