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33 lines
1.1 KiB
Python
33 lines
1.1 KiB
Python
import logging
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from comment_service.models.proto import user_pb2
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from comment_service.events.base_consumer import EventConsumer
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class UserEventConsumer(EventConsumer):
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"""Consumer class responsible for 'user' events.
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Attributes:
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CONSUMER_TOPIC: The topic to consume events from.
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CONSUMER_EVENT_TYPE (user_pb2.UserEvent): Kafka messages are serialised to this type.
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_db_repo (CommentDBRepository): The repository interface for modifying data.
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_consumer (aiokafka.AIOKafkaConsumer): The underlying Kafka instance.
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"""
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CONSUMER_TOPIC = "user"
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CONSUMER_EVENT_TYPE = user_pb2.UserEvent
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async def _process_event(self, event: user_pb2.UserEvent) -> None:
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"""Process a recieved event.
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In response to a User deleted event, delete any comments
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created by that user.
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Args:
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event (user_pb2.UserEvent): The decoded protobuf message.
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"""
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if event.type == "deleted":
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assert event.data.id != ""
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await self._db_repo.delete_user_comments(event.data.id)
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logging.info("succesfully processed UserEvent (type: 'deleted')") |