no need for shared instances here

openwebrx.py

@@ -7,7 +7,7 @@ from owrx.feature import FeatureDetector
 from owrx.source import SdrService, ClientRegistry
 from socketserver import ThreadingMixIn
 from owrx.sdrhu import SdrHuUpdater
-from owrx.service import ServiceManager
+from owrx.service import Services
 
 import logging
 
@@ -48,7 +48,7 @@ Author contact info:    Andras Retzler, HA7ILM <randras@sdr.hu>
         updater = SdrHuUpdater()
         updater.start()
 
-    ServiceManager.getSharedInstance().start()
+    Services.start()
 
     server = ThreadedHttpServer(("0.0.0.0", pm.getPropertyValue("web_port")), RequestHandler)
     server.serve_forever()

owrx/service.py

@@ -205,16 +205,9 @@ class AprsHandler(object):
         pass
 
 
-class ServiceManager(object):
-    sharedInstance = None
-
+class Services(object):
     @staticmethod
-    def getSharedInstance():
-        if ServiceManager.sharedInstance is None:
-            ServiceManager.sharedInstance = ServiceManager()
-        return ServiceManager.sharedInstance
-
-    def start(self):
+    def start():
         if not PropertyManager.getSharedInstance()["services_enabled"]:
             return
         for source in SdrService.getSources().values():