Hi,
I replaced send_event with send_event_to_observers and now I no longer see
the EVENT LOST, but the function North_CrossDomainTrafficRequestEvent()
that is supposed to run when it receives the event is still not running,
because I don't see the print message. The code for that is :
@set_ev_cls(Custom_event.North_CrossDomainTrafficRequestEvent)
def _handle_cross_domain_traffic_request(self,ev):
print ("Handling Cross Domain Traffic Request") # this
message should be printed if the event was received properly
Thank you,
Yiwen
On Thu, Jan 26, 2017 at 2:27 AM, Iwase Yusuke <iwase.yusu...@gmail.com>
wrote:
> Hi,
>
> How about using "send_event_to_observers" instead?
> https://github.com/iwaseyusuke/ryu/blob/master/
> ryu/base/app_manager.py#L305-L326
>
> If you want to use "send_event", the first argument must be the name
> of RyuApp which is observing the given event.
> OTOH, "send_event_to_observers" will detects all RyuApp which are
> observing the given event.
>
> Thanks,
> Iwase
>
>
> On 2017年01月26日 13:28, Yiwen Shen wrote:
> > Hi,
> >
> > I'm trying to start my Ryu system by sending an event from one app to
> another, but it keeps saying EVENT LOST when I use --verbose. I understand
> from another thread that we need to wait a bit for the event pipeline to
> open, so I put hub.sleep(5) but the problem persists.
> >
> > My original code was:
> >
> > /def start(self):/
> > / super(Initialization,self).start()
> > new_north_traffic_request_ev = Custom_event.North_
> CrossDomainTrafficRequestEvent()/
> > / hub.sleep(5)/
> > / self.send_event('Test', new_north_traffic_request_ev)/
> >
> > and inside North_CrossDomainTrafficRequestEvent(), I have a print
> statement to see if the event was triggered by the sent event but it's not
> since we have EVENT LOST.
> > (Specifically it says EVENT LOST Initialization->Test North_
> CrossDomainTrafficRequestEvent).
> >
> > I have also tried separating start into a separate function for the
> event, and spawning a thread for that event, not sure if that helps, but I
> still get EVENT LOST:
> > /
> > /
> > / def _north_request_event(self):/
> > / hub.sleep(5)/
> > / new_north_traffic_request_ev = Custom_event.North_
> CrossDomainTrafficRequestEvent()/
> > / self.send_event('Test', new_north_traffic_request_ev)/
> > /
> > /
> > / def start(self):/
> > / super(Initialization,self).start()/
> > / self.threads.append(hub.spawn(self._north_request_event))/
> >
> > Thank you,
> > Yiwen
> >
> >
> > ------------------------------------------------------------
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> >
> >
> >
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> >
>
--
*Yiwen Shen*
PhD Candidate at Lightwave Research Laboratory
<http://lightwave.ee.columbia.edu/>
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