Stuff

main.py

@@ -1,5 +1,7 @@
+import sys
 import threading
 
+from colony.core.logger.logging import get_logger
 from colony.core.network.core import Network
 from colony.core.dispatcher import Dispatcher
 from colony.core.roles.manager import RoleManager
@@ -12,6 +14,7 @@ from colony.settings import configuration
 
 
 def main():
+    logger = get_logger("main")
     state_manager = StateManager()
 
     if 'Unit' not in state_manager.get(StateManager.Data.Roles):
@@ -26,9 +29,17 @@ def main():
         state_manager=state_manager,
     )
 
-    threads = []
+    role_manager.initialize_roles()
 
     listener = Listener(dispatcher=dispatcher)
+    try:
+        listener.bind()
+    except OSError as e:
+        logger.error(f"Cannot listen on {listener.host}:{listener.port}: {e}")
+        sys.exit(1)
+
+    threads = []
+
     t = threading.Thread(
         target=listener.start,
         daemon=True,
@@ -46,7 +57,6 @@ def main():
     t.start()
     threads.append(t)
 
-    role_manager.initialize_roles()
     role_manager.start_all()
 
     for t in threads: