Ooo i see, thanks for the reply.
It usually works assynchronously, i even used it like that on NOX and POX,
but i was having a tough time with this. Will include it on the
documentation!
It worked now, will carry on to doing a tutorial *all you need to program
in RYU* now. Thanks for all the help.
On Wed, Aug 7, 2013 at 8:16 PM, FUJITA Tomonori <
[email protected]> wrote:
> On Wed, 7 Aug 2013 14:13:04 -0300
> Tonhão - Antonio Brasolin <[email protected]> wrote:
>
> > Sorry to bother you again, i still can't quite get it to work.
> >
> > I tried to use the method defined there, but the stats always returns
> empty.
> >
> > How i tried:
> > .
> > .
> > .
> > def getPeriodicStats(dp):
> > """show periodic stats on screen
> >
> > :param dp: the datapath from which the stats shall be shown
> > """
> > waiters = {}
> > while True:
> > stats = get_flow_stats(dp, waiters)
> > print stats
>
> The above doesn't work since get_flow_stats works asynchronously. IOW,
> it just sends a request. The response will be delivered later. You
> need to a handler fo catch the response:
>
> https://github.com/osrg/ryu/blob/master/ryu/app/ofctl_rest.py#L243
>
>
> > time.sleep(1)
> > .
> > .
> > .
> >
> > def dp_handler(self, ev):
> > .
> > .
> > .
> > if ev.enter:
> > self.topo.add_node(ev.dp.id)
> > thread.start_new(getPeriodicStats, (ev.dp,))
> >
> >
> > Am i doing something wrong? Also, i'm not sure what is the use for the
> > waiter dictionary.
>
> As I wrote, get_flow_stats works asynchronosuly so when a request is
> sent, its xid is sored in the 'waiter' dictionary. Then the response
> is delivered, you can find the corresponding request.
>
> >
> > On Tue, Aug 6, 2013 at 10:44 PM, FUJITA Tomonori <
> > [email protected]> wrote:
> >
> >> On Tue, 6 Aug 2013 13:31:20 -0300
> >> Tonhão - Antonio Brasolin <[email protected]> wrote:
> >>
> >> > The purpose of this code is to use a lot of resources from ryu without
> >> > doing anything specific, to serve as a reference/example for many
> things.
> >> > We wanted to make a statistic request/reply but are not sure how, can
> you
> >> > help us on that matter?
> >>
> >> The following code would help?
> >>
> >> https://github.com/osrg/ryu/blob/master/ryu/lib/ofctl_v1_0.py
> >>
> >> > After finishing this, we are going to make a tutorial that teaches
> how to
> >> > use the many resources and serve as a reference to what events,
> contexts
> >> > and messages there are and what classes represent each.
> >> >
> >> > Possible advanced topics in the course may include QoS and security,
> for
> >> > which we may create sample applications.
> >>
> >
> >
> >
> > --
> > El Psy Congroo,
> > Antonio Añon Brasolin,
> > Masters Degree Student in Universidade Federal de São Carlos
>
--
El Psy Congroo,
Antonio Añon Brasolin,
Masters Degree Student in Universidade Federal de São Carlos
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