Fixed a bug when used consumer_update_listener callback from anothe…

…r subscription in single active consumer mode. (#210)

rstream/consumer.py

@@ -414,6 +414,9 @@ async def _on_consumer_update_query_response(
             Callable[[bool, EventContext], Awaitable[OffsetSpecification]]
         ] = None,
     ) -> None:
+        if frame.subscription_id != subscriber.subscription_id:
+            return
+
         # event the consumer is not active, we need to send a ConsumerUpdateResponse
         # by protocol definition. the offsetType can't be null so we use OffsetTypeNext as default
         if consumer_update_listener is None:

tests/test_consumer.py

@@ -444,6 +444,71 @@ async def consumer_update_listener_with_custom_offset(
         await producer.close()
 
 
+async def test_consume_with_multiple_sac_custom_consumer_update_listener_cb(
+    consumer: Consumer, producer: Producer
+) -> None:
+    stream_name_1 = "stream1"
+    stream_name_2 = "stream2"
+    await producer.create_stream(stream=stream_name_1)
+    await producer.create_stream(stream=stream_name_2)
+    try:
+        # necessary to use send_wait here, because rmq will store every message in separate batch.
+        # In case of use send_batch rstream will filter messages on the client side bypassing some problems.
+        for i in range(10):
+            await producer.send_wait(stream_name_1, AMQPMessage(body=f"{i}".encode()))
+            await producer.send_wait(stream_name_2, AMQPMessage(body=f"{i}".encode()))
+
+        received_offsets_1 = []
+        received_offsets_2 = []
+
+        async def consumer_cb1(message: bytes, message_context: MessageContext) -> None:
+            received_offsets_1.append(message_context.offset)
+
+        async def consumer_cb2(message: bytes, message_context: MessageContext) -> None:
+            received_offsets_2.append(message_context.offset)
+
+        async def consumer_update_listener_with_custom_offset_1(
+            is_active: bool, event_context: EventContext
+        ) -> OffsetSpecification:
+            if is_active:
+                return OffsetSpecification(offset_type=OffsetType.OFFSET, offset=5)
+            return OffsetSpecification(offset_type=OffsetType.FIRST, offset=0)
+
+        async def consumer_update_listener_with_custom_offset_2(
+            is_active: bool, event_context: EventContext
+        ) -> OffsetSpecification:
+            if is_active:
+                return OffsetSpecification(offset_type=OffsetType.OFFSET, offset=7)
+            return OffsetSpecification(offset_type=OffsetType.FIRST, offset=0)
+
+        async with consumer:
+            await consumer.subscribe(
+                stream=stream_name_1,
+                callback=consumer_cb1,
+                properties={"single-active-consumer": "true", "name": "sac_name1"},
+                offset_specification=ConsumerOffsetSpecification(OffsetType.FIRST),
+                consumer_update_listener=consumer_update_listener_with_custom_offset_1,
+            )
+            await consumer.subscribe(
+                stream=stream_name_2,
+                callback=consumer_cb2,
+                properties={"single-active-consumer": "true", "name": "sac_name2"},
+                offset_specification=ConsumerOffsetSpecification(OffsetType.FIRST),
+                consumer_update_listener=consumer_update_listener_with_custom_offset_2,
+            )
+
+            await wait_for(lambda: len(received_offsets_1) >= 1)
+            await wait_for(lambda: len(received_offsets_2) >= 1)
+
+            assert received_offsets_1[0] == 5
+            assert received_offsets_2[0] == 7
+
+    finally:
+        await producer.delete_stream(stream=stream_name_1)
+        await producer.delete_stream(stream=stream_name_2)
+        await producer.close()
+
+
 async def test_consume_superstream_with_sac_all_active(
     super_stream: str,
     super_stream_consumer_for_sac1: SuperStreamConsumer,