Guozhang Wang created KAFKA-1617:
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Summary: Move Metadata Cache to TopicManager and handling of
Offset Request to LogManager
Key: KAFKA-1617
URL: https://issues.apache.org/jira/browse/KAFKA-1617
Project: Kafka
Issue Type: Bug
Reporter: Guozhang Wang
Fix For: 0.9.0
This is a follow-up of KAFKA-1583. In order to make Kafka APIs a pure stateless
layer that just forwards different requests to the corresponding managers,
there are still two tasks left:
1. Move the metadata cache at KafkaApis to a separate manager, maybe called
TopicManager, which will be responsible for a) handle topic metadata request,
b) handle topic metadata update request by talking to replica manager if
necessary.
2. Move the handling logic of offset request to the LogManager, which should
contain all the information necessary to handle this request.
Finally, the KafkaApis class should be stateless, meaning no inner variables
and no start()/shutdown() functions needed.
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