Engine as singleton. #43 #44

modules/core/engine.py

@@ -44,6 +44,7 @@ class Engine():
     """
     The Engine.
     """
+    instance = None
     engine_time_offset = 0.0
 
     logger = None
@@ -68,6 +69,9 @@ class Engine():
         Args:
             config (AuraConfig):    The configuration
         """
+        if Engine.instance:
+            raise Exception("Engine is already running!")
+        Engine.instance = self
         self.config = config
         self.plugins = dict()
         self.logger = logging.getLogger("AuraEngine")        
@@ -178,6 +182,14 @@ class Engine():
         return SU.timestamp() + Engine.engine_time_offset
 
 
+    @staticmethod
+    def get_instance():
+        """
+        Returns the one and only engine.
+        """
+        return Engine.instance
+
+
     def terminate(self):
         """
         Terminates the engine and all related processes.