dengziming created KAFKA-9277: --------------------------------- Summary: move all group state transition rules into their states Key: KAFKA-9277 URL: https://issues.apache.org/jira/browse/KAFKA-9277 Project: Kafka Issue Type: Improvement Reporter: dengziming Assignee: dengziming
Today the `GroupMetadata` maintain a validPreviousStates map of all GroupState: ``` private val validPreviousStates: Map[GroupState, Set[GroupState]] = Map(Dead -> Set(Stable, PreparingRebalance, CompletingRebalance, Empty, Dead), CompletingRebalance -> Set(PreparingRebalance), Stable -> Set(CompletingRebalance), PreparingRebalance -> Set(Stable, CompletingRebalance, Empty), Empty -> Set(PreparingRebalance)) ``` It would be cleaner to move all state transition rules into their states : ``` private[group] sealed trait GroupState { val validPreviousStates: Set[GroupState] } ``` -- This message was sent by Atlassian Jira (v8.3.4#803005)