Rework whole package structure (improved dependency handling)

lib/tfw/main/__init__.py

@@ -1,3 +1,4 @@
 from .tfw_connector import TFWUplinkConnector, TFWConnector
 from .event_handler_factory import EventHandlerFactory
 from .signal_handling import setup_signal_handlers
+from .tfw_server import TFWServer

lib/tfw/main/event_handler_factory.py

@@ -1,4 +1,4 @@
-from tfw.event_handlers import EventHandlerFactoryBase
+from tfw.internals.event_handling import EventHandlerFactoryBase
 
 from .tfw_connector import TFWConnector
 

lib/tfw/main/signal_handling.py

@@ -1,6 +1,6 @@
 from signal import signal, SIGTERM, SIGINT
 
-from tfw.event_handlers import EventHandler
+from tfw.internals.event_handling import EventHandler
 
 
 def setup_signal_handlers():

lib/tfw/main/tfw_connector.py

@@ -1,4 +1,4 @@
-from tfw.networking import ServerConnector, ServerUplinkConnector
+from tfw.internals.networking import ServerConnector, ServerUplinkConnector
 from tfw.config import TFWENV
 
 

lib/tfw/main/tfw_server.py

@@ -0,0 +1,31 @@
+import logging
+
+from tornado.web import Application
+
+from tfw.internals.networking import EventHandlerConnector
+from tfw.internals.server import ZMQWebSocketRouter
+from tfw.config import TFWENV
+
+
+LOG = logging.getLogger(__name__)
+
+
+class TFWServer:
+    """
+    This class handles the proxying of messages between the frontend and event handers.
+    It proxies messages from the "/ws" route to all event handlers subscribed to a ZMQ
+    SUB socket.
+    """
+    def __init__(self):
+        self._event_handler_connector = EventHandlerConnector(
+            downlink_bind_addr=f'tcp://*:{TFWENV.PULL_PORT}',
+            uplink_bind_addr=f'tcp://*:{TFWENV.PUB_PORT}'
+        )
+        self.application = Application([(
+            r'/ws', ZMQWebSocketRouter, {
+                'event_handler_connector': self._event_handler_connector,
+            }
+        )])
+
+    def listen(self):
+        self.application.listen(TFWENV.WEB_PORT)