kafkaserver_startup.png
KafkaRequestHandler
RequestChannel::receiveRequest
来poll到新的request交给KafkaApis
处理;request.requestId match {
case RequestKeys.ProduceKey => handleProducerRequest(request)
case RequestKeys.FetchKey => handleFetchRequest(request)
case RequestKeys.OffsetsKey => handleOffsetRequest(request)
case RequestKeys.MetadataKey => handleTopicMetadataRequest(request)
case RequestKeys.LeaderAndIsrKey => handleLeaderAndIsrRequest(request)
case RequestKeys.StopReplicaKey => handleStopReplicaRequest(request)
case RequestKeys.UpdateMetadataKey => handleUpdateMetadataRequest(request)
case RequestKeys.ControlledShutdownKey => handleControlledShutdownRequest(request)
case RequestKeys.OffsetCommitKey => handleOffsetCommitRequest(request)
case RequestKeys.OffsetFetchKey => handleOffsetFetchRequest(request)
case RequestKeys.GroupCoordinatorKey => handleGroupCoordinatorRequest(request)
case RequestKeys.JoinGroupKey => handleJoinGroupRequest(request)
case RequestKeys.HeartbeatKey => handleHeartbeatRequest(request)
case RequestKeys.LeaveGroupKey => handleLeaveGroupRequest(request)
case RequestKeys.SyncGroupKey => handleSyncGroupRequest(request)
case RequestKeys.DescribeGroupsKey => handleDescribeGroupRequest(request)
case RequestKeys.ListGroupsKey => handleListGroupsRequest(request)
case requestId => throw new KafkaException("Unknown api code " + requestId
kafkaapis.png