diff --git a/snippets/test8.py b/snippets/test8.py
index f9f7391..632a4e3 100644
--- a/snippets/test8.py
+++ b/snippets/test8.py
@@ -5,6 +5,24 @@ import socketserver
 import cmd
 import io
 
+
+
+class AbstractNotificationReceiver(object):
+    def receiveNotification(self, arg):
+        raise NotImplementedError
+
+class NotificationForwarder(object):
+    def __init__(self):
+        self.receivers = []
+
+    def register(self, receiver):
+        self.receivers.append(receiver)
+
+    def notify(self, arg=None):
+        for r in self.receivers:
+            r.receiveNotification(arg)
+
+
 class AbstractModbusDatapoint(object):
     def __init__(self, label, unit, address, count, scanRate):
         self.label = label
@@ -19,8 +37,6 @@ class AbstractModbusDatapoint(object):
         else:
             self.priority = 0
 
-
-
     def __lt__(self, other): return self.priority < other.priority
     def __le__(self, other): return self.priority <= other.priority
     def __eq__(self, other): return self.priority == other.priority
@@ -31,6 +47,7 @@ class AbstractModbusDatapoint(object):
     def __str__(self):
         return "{0}, {1}: {2} {3} {4}".format(self.type, self.label, self.unit, self.address, self.count)
 
+
 class HoldingRegisterDatapoint(AbstractModbusDatapoint):
     def __init__(self, label, unit, address, count, scanRate, publishTopic, subscribeTopic, feedbackTopic):
         super(HoldingRegisterDatapoint, self).__init__(label, unit, address, count, scanRate)
@@ -70,13 +87,14 @@ class HoldingRegisterDatapoint(AbstractModbusDatapoint):
         self.writeRequestValue = value
 
 
-class MqttProcessor(threading.Thread):
+class MqttProcessor(threading.Thread, AbstractNotificationReceiver):
     def __init__(self, registers, queue):
         super(MqttProcessor, self).__init__()
         self.registers = registers
         self.queue = queue
 
-    def registersChanged(self):
+    def receiveNotification(self, arg):
+        print("MqttProcessor:registersChanged")
         pass
         # subscribe and/or unsubscribe according to register changes
 
@@ -97,7 +115,7 @@ class MqttProcessor(threading.Thread):
         # self.put(r)
 
 
-class ScanRateConsideringQueueFeeder(threading.Thread):
+class ScanRateConsideringQueueFeeder(threading.Thread, AbstractNotificationReceiver):
     def __init__(self, registers, queue):
         super(ScanRateConsideringQueueFeeder, self).__init__()
         self.registers = registers
@@ -107,7 +125,8 @@ class ScanRateConsideringQueueFeeder(threading.Thread):
     def getMinimalScanrate(self):
             return min([r.scanRate.total_seconds() for r in self.registers if r.scanRate])
 
-    def registersChanged(self):
+    def receiveNotification(self, arg):
+        print("ScanRateConsideringQueueFeeder:registersChanged")
         self.delay = self.getMinimalScanrate()
 
     def run(self):
@@ -140,7 +159,6 @@ class CommunicationProcessor(threading.Thread):
             r.enqueued = False
 
 
-
 class CmdInterpreter(cmd.Cmd):
     def __init__(self, infile, outfile):
         super(CmdInterpreter, self).__init__(stdin=infile, stdout=outfile)
@@ -149,6 +167,9 @@ class CmdInterpreter(cmd.Cmd):
     def do_test(self, arg):
         self.stdout.write("This is the test response")
 
+    def do_notify(self, arg):
+        nf.notify()
+
     def do_bye(self, arg):
         self.stdout.write("Bye!")
         return True
@@ -156,38 +177,25 @@ class CmdInterpreter(cmd.Cmd):
 
 class CmdHandle(socketserver.StreamRequestHandler):
     def handle(self):
-        print("About to handle cmd session")
         cmd = CmdInterpreter(io.TextIOWrapper(self.rfile), io.TextIOWrapper(self.wfile))
-        cmd.cmdloop()
+        try:
+            cmd.cmdloop()
+        except ConnectionAbortedError as e:
+            print("Cmd handle externally interrupted")
 
-    def finish(self):
-        super(CmdHandle, self).finish()
-        print("END")
 
-class CmdServer(object):
+class CmdServer(threading.Thread):
     def __init__(self, address, port):
+        super(CmdServer, self).__init__()
         self.server = socketserver.ThreadingTCPServer((address, port), CmdHandle)
-        self.serverThread = threading.Thread(target=self.server.serve_forever())
 
     def start(self):
-        self.serverThread.start()
+        self.server.serve_forever()
 
 
 
 
 
-
-#  ModbusRequestDefinition(4, 0x2000, 2, 'F', '(ERR) Unavailable device'),
-#  ModbusRequestDefinition(1, 0x2000, 4, 'F', '(ERR) Wrong register size'),
-#  ModbusRequestDefinition(1, 0x2000, 2, 'F', 'Voltage'),
-#  ModbusRequestDefinition(1, 0x2020, 2, 'F', 'Frequency'),
-#  ModbusRequestDefinition(1, 0x2060, 2, 'F', 'Current'),
-#  ModbusRequestDefinition(3, 0x0004, 2, 'RF', 'Resistance Channel 1'),
-#  ModbusRequestDefinition(3, 0x000C, 2, 'RF', 'Temperature Channel 1'),
-#  ModbusRequestDefinition(3, 0x0014, 2, 'RF', 'Resistance Channel 2'),
-#  ModbusRequestDefinition(3, 0x001C, 2, 'RF', 'Temperature Channel 2'),
-
-
 datapoints = [
     HoldingRegisterDatapoint('Voltage', 1, 0x2000, 2, datetime.timedelta(seconds=10), 'Pub/Voltage', None, None),
     HoldingRegisterDatapoint('Frequency', 1, 0x2020, 2, datetime.timedelta(seconds=10), 'Pub/Frequency', None, None),
@@ -199,17 +207,21 @@ datapoints = [
     HoldingRegisterDatapoint('Relay1', 5, 0x0001, 1, None, None, 'Sub/Relay1', 'Feedback/Relay1')
 ]
 
-
 queue = queue.PriorityQueue()
-
+nf = NotificationForwarder()
 
 
 if __name__ == "__main__":
-    #cp = CommunicationProcessor(queue)
-    #cp.start()
+    cp = CommunicationProcessor(queue)
+    cp.start()
 
-    #qf = ScanRateConsideringQueueFeeder(datapoints, queue)
-    #qf.start()
+    mp = MqttProcessor(datapoints, queue)
+    nf.register(mp)
+    mp.start()
 
-    cs = CmdServer('0.0.0.0',9999)
+    qf = ScanRateConsideringQueueFeeder(datapoints, queue)
+    nf.register(qf)
+    qf.start()
+
+    cs = CmdServer('127.0.0.1',9999)
     cs.start()
\ No newline at end of file