remove acquire() and release() functions and run the threads as deamons for easier cleanups

aman/AMAN.py

@@ -30,6 +30,7 @@ class AMAN:
 
     def __init__(self):
         # default initialization of members
+        configPath = AMAN.findConfigPath()
         self.SystemConfig = None
         self.AircraftPerformance = None
         self.Receiver = None
@@ -37,15 +38,6 @@ class AMAN:
         self.WebUi = None
         self.Workers = []
 
-        # initialize the random number generator
-        random.seed(time.time())
-
-    def __del__(self):
-        self.release()
-
-    def aquire(self):
-        configPath = AMAN.findConfigPath()
-
         # read all system relevant configuration files
         self.SystemConfig = System(os.path.join(configPath, 'System.ini'))
         print('Parsed System.ini')
@@ -58,13 +50,10 @@ class AMAN:
         else:
             print('Parsed PerformanceData.ini. Extracted ' + str(len(self.AircraftPerformance.Aircrafts)) + ' aircrafts')
 
-        self.Weather = Weather()
-        self.Weather.acquire(self.SystemConfig.Weather)
-        self.WebUi = WebUI()
-        self.WebUi.acquire(self.SystemConfig.Server, self)
+        # create the communication syb
+        self.Weather = Weather(self.SystemConfig.Weather)
+        self.Receiver = Euroscope(configPath, self.SystemConfig.Server, self)
 
-        # create the EuroScope receiver
-        self.Receiver = Euroscope()
 
         # find the airport configurations and create the workers
         airportsPath = os.path.join(os.path.join(configPath, 'airports'), '*.ini')
@@ -75,31 +64,13 @@ class AMAN:
             airportConfig = Airport(file, icao)
 
             # initialize the worker thread
-            worker = Worker()
-            worker.acquire(icao, airportConfig, self.Weather, self.AircraftPerformance, self.WebUi, self.Receiver)
+            worker = Worker(icao, airportConfig, self.Weather, self.AircraftPerformance, self.Receiver)
             self.Workers.append(worker)
             print('Started worker for ' + icao)
 
-        # initialize the receiver
-        self.Receiver.acquire(configPath, self.SystemConfig.Server, self)
 
-    def release(self):
-        if None != self.Workers:
-            for worker in self.Workers:
-                worker.release()
-        self.Workers = None
 
-        if None != self.Receiver:
-            self.Receiver.release()
-        self.Receiver = None
-
-        if None != self.Weather:
-            self.Weather.release()
-        self.Weather = None
 
-        if None != self.WebUi:
-            self.WebUi.release()
-        self.WebUi = None
 
     def updateAircraftReport(self, report : AircraftReport_pb2.AircraftReport):
         # find the correct worker for the inbound

aman/com/Euroscope.py

@@ -40,33 +40,13 @@ class ReceiverThread(Thread):
                 else:
                     return
 
-    def threadId(self):
-        if hasattr(self, '_thread_id'):
-            return self._thread_id
-        for id, thread in _active.items():
-            if thread is self:
-                return id
-
-    def stopThread(self):
-        id = self.threadId()
-        res = ctypes.pythonapi.PyThreadState_SetAsyncExc(id, ctypes.py_object(SystemExit))
-        if 1 < res:
-            ctypes.pythonapi.PyThreadState_SetAsyncExc(id, 0)
-
 # @brief Receives and sends messages to EuroScope plugins
 class Euroscope:
-    def __init__(self):
+    def __init__(self, configPath : str, config : Server, aman):
         self.Context = None
         self.ReceiverSocket = None
         self.ReceiverThread = None
         self.NotificationSocket = None
-
-    def __del__(self):
-        self.release()
-
-    # @brief Initializes the ZMQ socket
-    # @param[in] config The server configuration
-    def acquire(self, configPath : str, config : Server, aman):
         self.Context = zmq.Context()
 
         # find the key directories
@@ -97,6 +77,7 @@ class Euroscope:
         self.ReceiverSocket.bind('tcp://' + config.Address + ':' + str(config.PortReceiver))
         self.ReceiverSocket.setsockopt(zmq.SUBSCRIBE, b'')
         self.ReceiverThread = ReceiverThread(self.ReceiverSocket, aman)
+        self.ReceiverThread.setDaemon(True)
         self.ReceiverThread.start()
         print('Listening to tcp://' + config.Address + ':' + str(config.PortReceiver))
 
@@ -108,22 +89,6 @@ class Euroscope:
         self.NotificationSocket.bind('tcp://' + config.Address + ':' + str(config.PortNotification))
         print('Publishing to tcp://' + config.Address + ':' + str(config.PortNotification))
 
-    def release(self):
-        if None != self.ReceiverThread:
-            self.ReceiverThread.stopThread()
-            self.ReceiverThread.join()
-        self.ReceiverThread = None
-
-        if None != self.ReceiverSocket:
-            self.ReceiverSocket.close()
-        self.ReceiverSocket = None
-
-        if None != self.NotificationSocket:
-            self.NotificationSocket.close()
-        self.NotificationSocket = None
-
-        self.Context = None
-
     def sendSequence(self, airport : str, inbounds, weather):
         if None == self.NotificationSocket:
             return

aman/com/Weather.py

@@ -11,15 +11,9 @@ from aman.com.DwdCrawler import DwdCrawler
 import aman.config.Weather
 
 class Weather(Thread):
-    def __init__(self):
+    def __init__(self, config : aman.config.Weather.Weather):
         Thread.__init__(self)
 
-        self.NextUpdate = None
-        self.LastUpdateTried = None
-        self.StopThread = False
-        self.Provider = None
-
-    def acquire(self, config : aman.config.Weather.Weather):
         self.NextUpdate = dt.utcfromtimestamp(int(time.time()))
         self.LastUpdateTried = None
         self.StopThread = False
@@ -31,12 +25,9 @@ class Weather(Thread):
             sys.stderr.write('Invalid or unknown weather-provider defined')
             sys.exit(-1)
 
+        self.setDaemon(True)
         self.start()
 
-    def release(self):
-        self.StopThread = True
-        self.join()
-
     def currentClock():
         clock = dt.utcfromtimestamp(int(time.time())).replace(tzinfo = pytz.UTC)
         return clock

aman/sys/Worker.py

@@ -17,27 +17,13 @@ from aman.types.Inbound import Inbound
 from aman.types.PerformanceData import PerformanceData
 
 class Worker(Thread):
-    def __init__(self):
+    def __init__(self, icao : str, configuration : Airport, weather : Weather,
+                 performance : PerformanceData, euroscope : Euroscope):
         Thread.__init__(self)
         self.StopThread = None
-        self.Icao = None
-        self.Configuration = None
-        self.PerformanceData = None
-        self.UpdateLock = None
-        self.ReportQueue = {}
-        self.WeatherModel = None
-        self.RecedingHorizonControl = None
-        self.WebUi = None
-
-    def __del__(self):
-        self.release()
-
-    def acquire(self, icao : str, configuration : Airport, weather : Weather,
-                performance : PerformanceData, webui : WebUI, euroscope : Euroscope):
-        self.StopThread = None
         self.Icao = icao
         self.Configuration = configuration
-        self.sequencingConfiguration = configuration.DefaultSequencing
+        self.SequencingConfiguration = configuration.DefaultSequencing
         self.PerformanceData = performance
         self.UpdateLock = Lock()
         self.ReportQueue = {}
@@ -68,16 +54,13 @@ class Worker(Thread):
                                 sys.exit(-1)
                         break
 
+        self.setDaemon(True)
         self.start()
 
     def acquireLock(self):
         if None != self.UpdateLock:
             self.UpdateLock.acquire()
 
-    def release(self):
-        self.StopThread = True
-        self.join()
-
     def releaseLock(self):
         if None != self.UpdateLock:
             self.UpdateLock.release()
@@ -107,7 +90,7 @@ class Worker(Thread):
 
                 if 0 != report.distanceToIAF and '' != report.initialApproachFix:
                     inbound = Inbound(report, self.PerformanceData)
-                    Node(inbound, inbound.ReportTime, self.WeatherModel, self.Configuration.GngData, self.sequencingConfiguration)
+                    Node(inbound, inbound.ReportTime, self.WeatherModel, self.Configuration.GngData, self.SequencingConfiguration)
                     if None != inbound.InitialArrivalTime:
                         self.RecedingHorizonControl.updateReport(inbound)
                     else:
@@ -123,13 +106,13 @@ class Worker(Thread):
                 # get the last landing aircrafts per runway before the RHC stage to check for constraints
                 # this is required to handle the overlap between windows
                 preceedingInbounds = {}
-                for runway in self.sequencingConfiguration.ActiveArrivalRunways:
+                for runway in self.SequencingConfiguration.ActiveArrivalRunways:
                     inbound = self.RecedingHorizonControl.lastFixedInboundOnRunway(runway.Runway.Name)
                     if None != inbound:
                         preceedingInbounds[runway.Runway.Name] = inbound
 
                 # configure the ACO run
-                acoConfig = Configuration(constraints = self.sequencingConfiguration, nav = self.Configuration.GngData,
+                acoConfig = Configuration(constraints = self.SequencingConfiguration, nav = self.Configuration.GngData,
                                           earliest = earliestArrivalTime, weather = self.WeatherModel,
                                           preceeding = None if 0 == len(preceedingInbounds) else preceedingInbounds,
                                           ants = 5 * len(relevantInbounds), generations = 5 * len(relevantInbounds))