text: ###############################################################################
  #
  # The MIT License (MIT)
  #
  # Copyright (c) Crossbar.io Technologies GmbH
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  #
  ###############################################################################
  
  from os import environ
  
  from twisted.internet import reactor
  from twisted.internet.defer import inlineCallbacks
  
  from autobahn.wamp.types import SubscribeOptions
  from autobahn.twisted.wamp import ApplicationSession, ApplicationRunner
  
  
  class Component(ApplicationSession):
  
      """
      An application component that subscribes and receives events
      of no payload and of complex payload, and stops after 5 seconds.
      """
  
      @inlineCallbacks
      def onJoin(self, details):
          print("session attached")
  
          self.received = 0
  
          def on_heartbeat(details=None):
              print("heartbeat (publication ID {})".format(details.publication))
  
          yield self.subscribe(
              on_heartbeat, u'com.myapp.heartbeat',
              options=SubscribeOptions(details_arg='details')
          )
  
          def on_topic2(a, b, c=None, d=None):
              print("Got event: {} {} {} {}".format(a, b, c, d))
  
          yield self.subscribe(on_topic2, u'com.myapp.topic2')
  
          reactor.callLater(5, self.leave)
  
      def onDisconnect(self):
          print("disconnected")
          reactor.stop()
  
  
  if __name__ == '__main__':
      import six
      url = environ.get("AUTOBAHN_DEMO_ROUTER", u"ws://127.0.0.1:8080/ws")
      if six.PY2 and type(url) == six.binary_type:
          url = url.decode('utf8')
      realm = u"crossbardemo"
      runner = ApplicationRunner(url, realm)
      runner.run(Component)
  