网络处理器DefaultRequestProcessor具体代码

原创

用户7365393

修改于 2021-09-26 17:24:25

3330

修改于 2021-09-26 17:24:25

Broker发出路由注册的心跳包之后，NameServer会根据心跳包中的requestCode进行处理。NameServer的默认网络处理器是DefaultRequestProcessor,具体代码如下：

public RemotingCommand processRequest(ChannelHandlerContext ctx,
        RemotingCommand request) throws RemotingCommandException {
    if (ctx != null) {
        log.debug("receive request, {} {} {}",
                  request.getCode(),
                  RemotingHelper.parseChannelRemoteAddr(ctx.channel()),
                  request);
    }
    switch (request.getCode()) {
        ......
        //，如果是RequestCode.REGISTER_BROKER，进行broker注册
        case RequestCode.REGISTER_BROKER:
            Version brokerVersion = MQVersion.value2Version(request.getVersion());
            if (brokerVersion.ordinal() >= MQVersion.Version.V3_0_11.ordinal()) {
                return this.registerBrokerWithFilterServer(ctx, request);
            } else {
                return this.registerBroker(ctx, request);
            }
        ......
        default:
            break;
    }
    return null;
}

判断requestCode，如果是RequestCode.REGISTER_BROKER，那么确定业务处理逻辑是注册Broker。根据Broker版本号选择不同的方法，我们已V3_0_11以上为例，调用registerBrokerWithFilterServer方法进行注册主要步骤分为三步：