How to send Autobahn/Twisted WAMP message from outside of protocol?

Question

I am following the basic wamp pubsub examples in the github code:

This example publishes messages from within the class:

class Component(ApplicationS         


        

Answer 1

Upon your app session joining the WAMP realm, it sets a reference to itself on the app session factory:

class MyAppComponent(ApplicationSession):

   ... snip

   def onJoin(self, details):
      if not self.factory._myAppSession:
         self.factory._myAppSession = self

You then can access this session from elsewhere in your code, e.g.

   @inlineCallbacks
   def pub():
      counter = 0  
      while True:
         ## here we can access the app session that was created ..
         ##
         if session_factory._myAppSession:
            session_factory._myAppSession.publish('com.myapp.topic123', counter)
            print("published event", counter)
         else:
            print("no session")
         counter += 1
         yield sleep(1)

   pub()