2014/1/23 YAMAMOTO Takashi <[email protected]>

> hi,
>
> i meant
>     send_request
>         req.q = hub.Queue()
>         send_event
>         return req.q.get()
>
>     reply_to_request
>         req.q.put(rep)
>

To be sure, it is simpler.

RyuApp#send_reply() became unnecessary when I tried. May we remove this? I
checked that it was not used directly in ryu internal. But this is used by
the user's application or I am worried. I would like to hear your opinion.
IMHO, it is a rare case.


>
> YAMAMOTO Takashi
>
> > manage the pair of a request/reply
> >
> > Signed-off-by: Satoshi Kobayashi <[email protected]>
> > ---
> > Changes v1 -> v2:
> >   - stop using uuid
> >   - refactoring
> >
> >  ryu/base/app_manager.py |   17 ++++++++++++++---
> >  ryu/controller/event.py |    1 +
> >  2 files changed, 15 insertions(+), 3 deletions(-)
> >
> > diff --git a/ryu/base/app_manager.py b/ryu/base/app_manager.py
> > index ebf2196..dddf56f 100644
> > --- a/ryu/base/app_manager.py
> > +++ b/ryu/base/app_manager.py
> > @@ -67,7 +67,7 @@ class RyuApp(object):
> >          self.observers = {}     # ev_cls -> observer-name -> states:set
> >          self.threads = []
> >          self.events = hub.Queue(128)
> > -        self.replies = hub.Queue()
> > +        self.replies = {}  # request:EventRequestBase ->
> reply-queue:hub.Queue
> >          self.logger = logging.getLogger(self.name)
> >
> >          # prevent accidental creation of instances of this class
> outside RyuApp
> > @@ -123,14 +123,24 @@ class RyuApp(object):
> >
> >      def send_reply(self, rep):
> >          assert isinstance(rep, EventReplyBase)
> > -        SERVICE_BRICKS[rep.dst].replies.put(rep)
> > +        # take the application that the reply should be sent
> > +        rep_dst_app = SERVICE_BRICKS[rep.dst]
> > +        reply_q = rep_dst_app.replies[rep.request]
> > +        # send the response
> > +        reply_q.put(rep)
> > +        # cleanup
> > +        del rep_dst_app.replies[rep.request]
> >
> >      def send_request(self, req):
> >          assert isinstance(req, EventRequestBase)
> >          req.sync = True
> > +        # prepare for receiving the reply
> > +        reply_q = hub.Queue()
> > +        self.replies[req] = reply_q
> > +        # send the request
> >          self.send_event(req.dst, req)
> >          # going to sleep for the reply
> > -        return self.replies.get()
> > +        return reply_q.get()
> >
> >      def _event_loop(self):
> >          while self.is_active or not self.events.empty():
> > @@ -161,6 +171,7 @@ class RyuApp(object):
> >
> >      def reply_to_request(self, req, rep):
> >          rep.dst = req.src
> > +        rep.request = req
> >          if req.sync:
> >              self.send_reply(rep)
> >          else:
> > diff --git a/ryu/controller/event.py b/ryu/controller/event.py
> > index 8191710..a2e24e2 100644
> > --- a/ryu/controller/event.py
> > +++ b/ryu/controller/event.py
> > @@ -31,4 +31,5 @@ class EventRequestBase(EventBase):
> >  class EventReplyBase(EventBase):
> >      def __init__(self, dst):
> >          super(EventReplyBase, self).__init__()
> > +        self.request = None
> >          self.dst = dst
> > --
> > 1.7.1
> >
> >
> >
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