Hi,
On 2015年08月26日 12:41, muzixing.com wrote:
> Hi, all.
> If I want to get some data from other module of app, what should I do?
>
> I know we can use CONTEXT to get the app as a service, and then we can
> get the data in that app. But, the logic of these two app is not about
> producer and consumer.
> The second method to get this data is using API. So, I have to build
> some API just like topology' API. However , I notice that Switches in
> topology just return the new data, if I want to write something into that
> data, it won't change the real data.
> Obviously, use import just can get the static defined data of using
> methods, we can't get the data of an alive object.
>
> So, what I need is a method to share the data between tow apps.
How about using app_manager.lookup_service_brick('Name of your RyuApp') method?
You can get a RyuApp instance by the name of your RyuApp.
e.g.)
$ git diff
diff --git a/ryu/app/simple_switch_13.py b/ryu/app/simple_switch_13.py
index 3e7c598..a0c69a8 100644
--- a/ryu/app/simple_switch_13.py
+++ b/ryu/app/simple_switch_13.py
@@ -32,6 +32,8 @@ class SimpleSwitch13(app_manager.RyuApp):
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
def switch_features_handler(self, ev):
+ ofctl_rest_RyuApp = app_manager.lookup_service_brick('RestStatsApi')
+ self.logger.info('ofctl_rest=%s', ofctl_rest_RyuApp)
datapath = ev.msg.datapath
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
$
$ ryu-manager ryu.app.ofctl_rest ryu.app.simple_switch_13
loading app ryu.app.ofctl_rest
loading app ryu.app.simple_switch_13
loading app ryu.controller.ofp_handler
instantiating app None of DPSet
creating context dpset
creating context wsgi
instantiating app ryu.app.ofctl_rest of RestStatsApi
instantiating app ryu.app.simple_switch_13 of SimpleSwitch13
instantiating app ryu.controller.ofp_handler of OFPHandler
(6472) wsgi starting up on http://0.0.0.0:8080/
ofctl_rest=<ryu.app.ofctl_rest.RestStatsApi object at 0x7fe164a34d50>
Please comfirm that RyuApp is already instantiated when you call
lookup_service_brick() method.
Thanks,
Iwase
>
> Thank you for your time.
> ------------------
> Distance 李呈
>
> _____________________________________________________
> School of Information and Communication Engineering
> Beijing University of Posts and Telecommunications
> Beijing 100876, PR China
>
> 北京邮电大学·信息与通信工程学院·通信工程
> _____________________________________________________
> Mobile Phone:
> (+86) 151-1698-3550 Beijing
> E-mail:
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> [email protected]
> Homepage:
> http://www.muzixing.com
>
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