[semanticLinking] added log messages

src/data-hub/semantic-linking-microservice/app/messaging/MessageHandler.py

@@ -54,15 +54,21 @@ class MessageHandler:
         
         layers = [Layer.from_business_logic_dict(row) for row in json.loads(response.text)]
 
+        LOGGER.info(f"Received {len(layers)} layers")
+
         # update local DB, insert each layer that does not already exists
         for layer in layers:
             print(f"Add layer to DB: {layer.to_serializable_dict(for_db=True)}")
             self._repository.delete_layer(layer)
             self._repository.add_layer(layer)
         
+        if len(layers)==0:
+            LOGGER.error(f"no schema information found")
+
         return layers
 
     def handle_new_trace(self, content: Dict):
+        LOGGER.info("new trace!")
         if "use_case" not in content or "id" not in content or "properties" not in content or "table" not in content:
             LOGGER.error(f"Missing fields in trace, required fields: (use_case, id, properties, table), given fields: ({content.keys()})")
             return
@@ -82,6 +88,7 @@ class MessageHandler:
             LOGGER.warning(f"No layers available for '{use_case}'.'{table}', ignoring trace.")
             return
 
+        LOGGER.info(f"{len(layers)} layers available")
         nodes = []
         
         for layer in layers:
@@ -97,7 +104,12 @@ class MessageHandler:
             nodes.append(node)
         
         if len(nodes) > 0:
+            LOGGER.info(f"{len(layers)} layers available")
             self._repository.add_layer_nodes(nodes)
+        else:
+            LOGGER.error(f"did NOT add nodes...")
+        
+        LOGGER.info("done")
 
     def handle_new_traces_available(self):
         # get all traces and call the Processor