daemon: Use a set to store broker handlers.

daemon/core/broker.py

@@ -54,7 +54,7 @@ class CoreBroker(ConfigurableManager):
         # list of node numbers that are PhysicalNode nodes
         self.phys = []
         # allows for other message handlers to process API messages (e.g. EMANE)
-        self.handlers = ()
+        self.handlers = set()
         # dict with tunnel key to tunnel device mapping
         self.tunnels = {}
         self.dorecvloop = False

daemon/core/emane/emane.py

@@ -67,7 +67,7 @@ class Emane(ConfigurableManager):
         self.logversion()
         # model for global EMANE configuration options
         self.emane_config = EmaneGlobalModel(session, None, self.verbose)
-        session.broker.handlers += (self.handledistributed, )
+        session.broker.handlers.add(self.handledistributed)
         self.loadmodels()
         self.service = None
 

daemon/core/mobility.py

@@ -33,7 +33,7 @@ class MobilityManager(ConfigurableManager):
         # dummy node objects for tracking position of nodes on other servers
         self.phys = {}
         self.physnets = {}
-        self.session.broker.handlers += (self.physnodehandlelink, )
+        self.session.broker.handlers.add(self.physnodehandlelink)
         self.register()
 
     def startup(self, nodenums=None):

daemon/core/sdt.py

@@ -50,7 +50,7 @@ class Sdt(object):
         # node information for remote nodes not in session._objs
         # local nodes also appear here since their obj may not exist yet
         self.remotes = {}
-        session.broker.handlers += (self.handledistributed, )
+        session.broker.handlers.add(self.handledistributed)
         
     def is_enabled(self):
         ''' Check for 'enablesdt' session option. Return False by default if

daemon/core/session.py

@@ -1132,7 +1132,7 @@ class SessionConfig(ConfigurableManager, Configurable):
 
     def __init__(self, session):
         ConfigurableManager.__init__(self, session)
-        session.broker.handlers += (self.handledistributed, )
+        session.broker.handlers.add(self.handledistributed)
         self.reset()
 
     def reset(self):