Hello Iwase,
thank you for taking the time to reply.
Yes, correct. I was hoping to be able to interact with the running my_app
application ($ryu-manager my_app.py) from another Python script. E.g. be able
to instantiate the class of the running app and make calls to functions
residing there.
I will try out the method you described below. Thank you.
Mvh,
Frode
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On 26 February 2018 1:23 AM, Iwase Yusuke <iwase.yusu...@gmail.com> wrote:
>
>
> Hi Frode,
>
> You mean "how to or is it possible to get an instance of a running Ryu
>
> application from another Python process?", right?
>
> Hmmm... as far as I know, it is very difficult...
>
> If "to get an instance from another Ryu application", you can use the API of
>
> "ryu.base.app_manager" module.
>
> $ cat my_app.py
>
> from ryu.base import app_manager
>
> app\_manager.require\_app('ryu.app.simple\_switch\_13')
>
> class MyApp(app_manager.RyuApp):
>
> def init(self, \*args, \*\*kwargs):
>
> super(MyApp, self).init(args, kwargs)
>
> self.simple\_switch = app\_manager.lookup\_service\_brick('SimpleSwitch13')
>
> self.logger.info(' app %s', self.simple_switch)
>
> $
>
> $ ryu-manager my_app.py
>
> loading app my_app.py
>
> loading app ryu.app.simple\_switch\_13
>
> loading app ryu.controller.ofp_handler
>
> instantiating app ryu.app.simple\_switch\_13 of SimpleSwitch13
>
> instantiating app my_app.py of MyApp
>
> \*\*\* app <ryu.app.simple\_switch\_13.SimpleSwitch13 object at
> 0x7f484c990898>
>
> instantiating app ryu.controller.ofp_handler of OFPHandler
>
> ...(snip)...
>
> In this case, please confirm that application which you want is already
>
> instantiated before calling "app\_manager.lookup\_service_brick()",
>
> If you need to get it from another Python process, I guess it is required to
>
> interrupt "ryu-manager" process like debugger...
>
> Thanks,
>
> Iwase
>
> On 2018年02月23日 16:50, Frode via Ryu-devel wrote:
>
> > Hello,
> >
> > first off kudos for this cool, and free, controller software. Second, I
> > wanted
> >
> > to ask you guys how I can instantiate an app which have been sent to
> > ryu-manager
> >
> > upon start?
> >
> > e.g. if I run
> >
> > $ ryu-manager simple\_switch\_13.py
> >
> > How can I then instantiate "class SimpleSwitch13(app_manager.RyuApp):" from
> > for
> >
> > example the interpreter or another python script when Ryu is running?
> >
> > Kind regards,
> >
> > Frode
> >
> > Check out the vibrant tech community on one of the world's most
> >
> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> >
> > Ryu-devel mailing list
> >
> > Ryu-devel@lists.sourceforge.net
> >
> > https://lists.sourceforge.net/lists/listinfo/ryu-devel
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