Hello YAMAMOTO,
I use instantiate method from AppManager to "install" an app (like apache
karaf)
you can see my code here(line 83):
https://github.com/TakeshiTseng/ryu/blob/dynamic_loader/ryu/cmd/ryu_dynamic_loader.py#L83
and I use instantiate method in line 106
Yi
2015-04-13 15:58 GMT+08:00 YAMAMOTO Takashi <[email protected]>:
> _CONTEXT is an old mechanism which we want to get rid of eventually.
> can you be a little more specific about your requirements?
>
> YAMAMOTO Takashi
>
> > Hi
> >
> > I am working on dynamic application loader for ryu, base on ryu-manager.
> >
> > I tried App_manager.instantiate(app_class) and it works
> >
> > However, if the _CONTEXT in app is not empty, it raised 'KeyError'
> >
> > The reason is that instantiate method in app manager does not create
> > context instance from app class
> >
> > If we want to use instantiate method in AppManager with new context, we
> > need to create context before we call "_instantiate" method.
> >
> >
> >>From 2eaace91ee70e489ca51f240615b1744c024d1be Mon Sep 17 00:00:00 2001
> > From: Takeshi <[email protected]>
> > Date: Sat, 11 Apr 2015 22:14:02 +0800
> > Subject: [PATCH 4/4] add "fix context not exist problem while using
> > AppManager.instantiate
> >
> > Signed-off-by: Takeshi <[email protected]>
> > ---
> > ryu/base/app_manager.py | 16 ++++++++++++++++
> > 1 file changed, 16 insertions(+)
> >
> > diff --git a/ryu/base/app_manager.py b/ryu/base/app_manager.py
> > index f0137ea..fe055b0 100644
> > --- a/ryu/base/app_manager.py
> > +++ b/ryu/base/app_manager.py
> > @@ -418,6 +418,17 @@ class AppManager(object):
> > self.contexts[key] = context
> > return self.contexts
> >
> > + def add_context(self, key, context_cls):
> > + if issubclass(context_cls, RyuApp):
> > + # hack for dpset
> > + context = self._instantiate(None, context_cls)
> > +
> > + else:
> > + context = context_cls()
> > + LOG.info('creating context %s', key)
> > + assert key not in self.contexts
> > + self.contexts[key] = context
> > +
> > def _update_bricks(self):
> > for i in SERVICE_BRICKS.values():
> > for _k, m in inspect.getmembers(i, inspect.ismethod):
> > @@ -469,6 +480,11 @@ class AppManager(object):
> > return app
> >
> > def instantiate(self, cls, *args, **kwargs):
> > + # create context for new application
> > + for key, context_cls in cls.context_iteritems():
> > + self.add_context(key, context_cls)
> > +
> > + kwargs.update(self.contexts)
> > app = self._instantiate(None, cls, *args, **kwargs)
> > self._update_bricks()
> > self._report_brick(app.name, app)
> > --
> > 2.3.2 (Apple Git-55)
> >
> >
> >
> >
> > -----
> > Yi Tseng (Takeshi)
> > Taiwan National Chiao Tung University
> > Department of Computer Science
> >
> > -----
>
--
-----
Yi Tseng (a.k.a Takeshi)
Taiwan National Chiao Tung University
Department of Computer Science
-----
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