[GitHub] [skywalking-python] sonatype-lift[bot] commented on a diff in pull request #224: Allow RabbitMQ BlockingChannel.basic_consume() to link with outgoing spans

[GitBox <gi...@apache.org>]

sonatype-lift[bot] commented on code in PR #224:
URL: https://github.com/apache/skywalking-python/pull/224#discussion_r923443038


##########
skywalking/plugins/sw_rabbitmq.py:
##########
@@ -73,8 +74,32 @@ def _sw_basic_publish(this, exchange,
 
 
 def _sw__on_deliver_func(__on_deliver):
+    from pika.adapters.blocking_connection import BlockingChannel
+
     def _sw__on_deliver(this, method_frame, header_frame, body):
         peer = f'{this.connection.params.host}:{this.connection.params.port}'
+        consumer_tag = method_frame.method.consumer_tag
+
+        # The following is a special case for one type of channel to allow any exit spans to be linked properly to the
+        # incoming segment. Otherwise, if we create the span here the span ends before any oser callbacks are called and
+        # so any new spans will not be linked to the incoming message.
+
+        defer_span = False
+
+        try:  # future-proofing if object structure changes
+            if consumer_tag not in this._cancelled and consumer_tag in this._consumers:
+                consumer = this._consumers[consumer_tag]
+
+                if isinstance(consumer.__self__, BlockingChannel):
+                    method_frame.method._sw_peer = peer
+                    defer_span = True
+
+        except Exception:

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