redefined the API to avoid GC issues during the destruction of the AMAN and its children

aman/com/Euroscope.py

@@ -53,9 +53,18 @@ class ReceiverThread(Thread):
 
 # @brief Receives and sends messages to EuroScope plugins
 class Euroscope:
+    def __init__(self):
+        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 __init__(self, configPath : str, config : Server, aman):
+    def acquire(self, configPath : str, config : Server, aman):
         self.context = zmq.Context()
 
         # find the key directories
@@ -97,8 +106,16 @@ class Euroscope:
         self.notificationSocket.bind('tcp://' + config.Address + ':' + str(config.PortNotification))
         print('Publishing to tcp://' + config.Address + ':' + str(config.PortNotification))
 
-    def __del__(self):
-        self.receiverThread.stopThread()
-        self.receiverThread.join()
-        self.receiverSocket.close()
-        self.notificationSocket.close()
+    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