public class RouteInfoManager {
    private static final InternalLogger log = InternalLoggerFactory.getLogger(LoggerName.NAMESRV_LOGGER_NAME);
    //Broker存活的時間周期，默認120秒
    private final static long DEFAULT_BROKER_CHANNEL_EXPIRED_TIME = 1000 * 60 * 2;
    private final ReadWriteLock lock = new ReentrantReadWriteLock();
    //保存Topic和隊列的路由信息
    private final Map<String/* topic */, Map<String, QueueData>> topicQueueTable;
    //Broker名字和Broker信息的對應(yīng)信息
    private final Map<String/* brokerName */, BrokerData> brokerAddrTable;
    //集群和Broker的對應(yīng)關(guān)系
    private final Map<String/* clusterName */, Set<String/* brokerName */>> clusterAddrTable;
    //在線的Broker地址和Broker信息的對應(yīng)關(guān)系
    private final Map<BrokerAddrInfo/* brokerAddr */, BrokerLiveInfo> brokerLiveTable;
    //過濾服務(wù)器消息
    private final Map<BrokerAddrInfo/* brokerAddr */, List<String>/* Filter Server */> filterServerTable;
    private final Map<String/* topic */, Map<String/*brokerName*/, TopicQueueMappingInfo>> topicQueueMappingInfoTable;
    private final BatchUnRegisterService unRegisterService;
    private final NamesrvController namesrvController;
    private final NamesrvConfig namesrvConfig;

switch (request.getCode()) {
    case RequestCode.PUT_KV_CONFIG:
        return this.putKVConfig(ctx, request);
    case RequestCode.GET_KV_CONFIG:
        return this.getKVConfig(ctx, request);
    case RequestCode.DELETE_KV_CONFIG:
        return this.deleteKVConfig(ctx, request);
    case RequestCode.QUERY_DATA_VERSION:
        return this.queryBrokerTopicConfig(ctx, request);
    case RequestCode.REGISTER_BROKER:
        //Broker注冊自身信息到Namesrv
        return this.registerBroker(ctx, request);
    case RequestCode.UNREGISTER_BROKER:
        //Broker取消注冊自身信息到Namesrv
        return this.unregisterBroker(ctx, request);
    case RequestCode.BROKER_HEARTBEAT:
        return this.brokerHeartbeat(ctx, request);
    case RequestCode.GET_BROKER_MEMBER_GROUP:
        return this.getBrokerMemberGroup(ctx, request);
    case RequestCode.GET_BROKER_CLUSTER_INFO:
        return this.getBrokerClusterInfo(ctx, request);
    case RequestCode.WIPE_WRITE_PERM_OF_BROKER:
        return this.wipeWritePermOfBroker(ctx, request);
    case RequestCode.ADD_WRITE_PERM_OF_BROKER:
        return this.addWritePermOfBroker(ctx, request);
    case RequestCode.GET_ALL_TOPIC_LIST_FROM_NAMESERVER:
        return this.getAllTopicListFromNameserver(ctx, request);
    case RequestCode.DELETE_TOPIC_IN_NAMESRV:
        return this.deleteTopicInNamesrv(ctx, request);
    case RequestCode.REGISTER_TOPIC_IN_NAMESRV:
        return this.registerTopicToNamesrv(ctx, request);
    case RequestCode.GET_KVLIST_BY_NAMESPACE:
        return this.getKVListByNamespace(ctx, request);
    case RequestCode.GET_TOPICS_BY_CLUSTER:
        return this.getTopicsByCluster(ctx, request);
    case RequestCode.GET_SYSTEM_TOPIC_LIST_FROM_NS:
        return this.getSystemTopicListFromNs(ctx, request);
    case RequestCode.GET_UNIT_TOPIC_LIST:
        return this.getUnitTopicList(ctx, request);
    case RequestCode.GET_HAS_UNIT_SUB_TOPIC_LIST:
        return this.getHasUnitSubTopicList(ctx, request);
    case RequestCode.GET_HAS_UNIT_SUB_UNUNIT_TOPIC_LIST:
        return this.getHasUnitSubUnUnitTopicList(ctx, request);
    case RequestCode.UPDATE_NAMESRV_CONFIG:
        return this.updateConfig(ctx, request);
    case RequestCode.GET_NAMESRV_CONFIG:
        return this.getConfig(ctx, request);
    case RequestCode.GET_CLIENT_CONFIG:
        return this.getClientConfigs(ctx, request);
    default:
        String error = " request type " + request.getCode() + " not supported";
        return RemotingCommand.createResponseCommand(RemotingSysResponseCode.REQUEST_CODE_NOT_SUPPORTED, error);
}