Use fresh messaging instances for each event handler

src/event_handlers/event_handler_base.py

@@ -1,9 +1,11 @@
 import json
 
+from messaging import Messaging
+
 
 class EventHandlerBase:
-    def __init__(self, messaging, anchor):
-        self.messaging = messaging
+    def __init__(self, anchor):
+        self.messaging = Messaging()
         self.anchor = anchor
         self.messaging.subscribe(self.anchor)
         self.subscriptions = {self.anchor}

src/event_handlers/event_handler_main.py

@@ -85,10 +85,10 @@ class LoginHandler(EventHandlerBase):
 
 if __name__ == '__main__':
     messaging = Messaging()
-    anchor_a = ChangeCaseHandler(messaging, 'anchor_a')
-    anchor_b = Rot13Handler(messaging, 'anchor_b')
-    anchor_c = ReverseHandler(messaging, 'anchor_c')
-    anchor_webide = SourceCodeEventHandler(messaging, 'anchor_webide', 'login_component.py', 'login')
-    anchor_terminado = TerminadoEventHandler(messaging, 'anchor_terminado', 'terminado')
+    anchor_a = ChangeCaseHandler('anchor_a')
+    anchor_b = Rot13Handler('anchor_b')
+    anchor_c = ReverseHandler('anchor_c')
+    anchor_webide = SourceCodeEventHandler('anchor_webide', 'login_component.py', 'login')
+    anchor_terminado = TerminadoEventHandler('anchor_terminado', 'terminado')
     IOLoop.instance().start()
 

src/event_handlers/source_code_event_handler.py

@@ -9,8 +9,8 @@ from event_handler_base import EventHandlerBase
 
 
 class SourceCodeEventHandler(EventHandlerBase, SupervisorMixin):
-    def __init__(self, messaging, anchor, filename, process_name=None):
-        super().__init__(messaging, anchor)
+    def __init__(self, anchor, filename, process_name=None):
+        super().__init__(anchor)
         self.working_directory = LOGIN_APP_DIR
         self.filename = filename
         self.language = map_file_extension_to_language(filename)

src/event_handlers/stateful_event_handler.py

@@ -4,8 +4,8 @@ from event_handler_base import EventHandlerBase
 
 
 class StatefulEventHandler(EventHandlerBase):
-    def __init__(self, messaging, anchor, event_handler_function):
-        super().__init__(messaging, anchor)
+    def __init__(self, anchor, event_handler_function):
+        super().__init__(anchor)
         self.event_handler_function = event_handler_function
         self.generator = None
         self.subscribe('reset')

src/event_handlers/terminado_event_handler.py

@@ -9,8 +9,8 @@ from config import TERMINADO_DIR
 
 
 class TerminadoEventHandler(EventHandlerBase, SupervisorMixin):
-    def __init__(self, messaging, anchor, process_name):
-        super().__init__(messaging, anchor)
+    def __init__(self, anchor, process_name):
+        super().__init__(anchor)
         self.working_directory = TERMINADO_DIR
         self.process_name = process_name
         self.setup_terminado_server()