Hi,
On 2015年01月29日 06:11, Marlon Olaya wrote:
> Hi, I'm triying to get the a flow stat, and i wanna use get_flow_stats(dp,
> waiters) from ryu//lib/ofctl_v1_0.py and I use this function for that:
>
> def statusReq(self, datapath):
> stats =[]
> waiters = {}
> stats= ofctl.get_flow_stats(dp=datapath,waiters=waiters)
> print "Stats of a flow"
> print stats
> return
>
> Im not sure if the code is right, but I get this result when I run the app:
>
> Stats of a flow
> {'14118357615532992': []}
>
> Can you help me to understad how to use this function correctly please?
Requires implementation of the "Stats Reply handler".
Please refer to the following code.
https://github.com/osrg/ryu/blob/master/ryu/app/ofctl_rest.py#L689-L725
(ofctl_rest.py is an application that uses the ofctl_v1_*.py)
> Also im not sure about the parameter "waiters" in the definition of the
> function, what's the meaning of it?
"waiters" has a list of xid of StatsReply waiting in each dpid.
Structure of "waiters" are as follows.
{dpid: {xid: (<ryu.lib.hub.Event object>, msgs)}, dpid: {xid: ....}
Therefore, the value of each xid will be removed in the following timing.
* When StatsReply received
https://github.com/osrg/ryu/blob/master/ryu/app/ofctl_rest.py#L724
* When StatsReply timeout
https://github.com/osrg/ryu/blob/master/ryu/lib/ofctl_v1_0.py#L252-L254
>
> Regards.
> Marlon Olaya
>
>
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