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Junping Du commented on YARN-2030: ---------------------------------- [~decster], I think He Jian was reviewing your patch. [~jianhe], I know you are quite busy on Hadoop Summit recently. Do you mind to review this patch again after that or you want me to review it? > Use StateMachine to simplify handleStoreEvent() in RMStateStore > --------------------------------------------------------------- > > Key: YARN-2030 > URL: https://issues.apache.org/jira/browse/YARN-2030 > Project: Hadoop YARN > Issue Type: Improvement > Reporter: Junping Du > Assignee: Binglin Chang > Attachments: YARN-2030.v1.patch, YARN-2030.v2.patch > > > Now the logic to handle different store events in handleStoreEvent() is as > following: > {code} > if (event.getType().equals(RMStateStoreEventType.STORE_APP) > || event.getType().equals(RMStateStoreEventType.UPDATE_APP)) { > ... > if (event.getType().equals(RMStateStoreEventType.STORE_APP)) { > ... > } else { > ... > } > ... > try { > if (event.getType().equals(RMStateStoreEventType.STORE_APP)) { > ... > } else { > ... > } > } > ... > } else if (event.getType().equals(RMStateStoreEventType.STORE_APP_ATTEMPT) > || event.getType().equals(RMStateStoreEventType.UPDATE_APP_ATTEMPT)) { > ... > if (event.getType().equals(RMStateStoreEventType.STORE_APP_ATTEMPT)) { > ... > } else { > ... > } > ... > if (event.getType().equals(RMStateStoreEventType.STORE_APP_ATTEMPT)) { > ... > } else { > ... > } > } > ... > } else if (event.getType().equals(RMStateStoreEventType.REMOVE_APP)) { > ... > } else { > ... > } > } > {code} > This is not only confuse people but also led to mistake easily. We may > leverage state machine to simply this even no state transitions. -- This message was sent by Atlassian JIRA (v6.2#6252)