feat/#63 - fix the send_command and add unit tests

amqp/service/amq_service.py

@@ -128,7 +128,10 @@ class AMQService:
                 swarm_id=self.amq_configuration.amq_adapter.swarm_task_id,
                 **kwargs,
             )
-            result: Future = self.amq_data_message_handler.send_rpc(route, message)
+            result: Future = asyncio.run_coroutine_threadsafe(
+                self.amq_data_message_handler.send_rpc(route, message),
+                loop=self.backpressure_handler.loop,
+            )
             self.set_outstanding_future(message, result)
             return result
 
@@ -138,6 +141,28 @@ class AMQService:
         )
         return result
 
+    def command(self, service_name: str, fq_method_name: str, **kwargs) -> bool:
+        """
+        Send a unidirectional Command message to the AMQ service.
+        :param service_name: The service name to receive the RPC message.
+        :param fq_method_name: The fully qualified method name to execute the RPC message.
+        :param kwargs: Additional keyword arguments to be passed to the RPC method.
+        :return: A Future that resolves when the RPC response is received.
+        """
+        route: Optional[AMQRoute] = self.router.find_route_by_service(service_name)
+        if route is not None:
+            message: DataMessage = self.data_message_factory.create_rpc_message(
+                fq_method_name=fq_method_name,
+                swarm_id=self.amq_configuration.amq_adapter.swarm_task_id,
+                **kwargs,
+            )
+            asyncio.run_coroutine_threadsafe(
+                self.amq_data_message_handler.send_command(route, message),
+                loop=self.backpressure_handler.loop,
+            )
+            return True
+        return False
+
     def get_unique_instance_id(self) -> int:
         """
         Provides cluster-wide unique instance ID for this AMQ service instance.