Nacos 源码分析02 注册-CFANZ编程社区

Nacos提供了服务注册的API接口，客户端只需要向该接口发送请求，即可实现服务注册

NacosServiceRegistryAutoConfiguration 负责自动装配

Nacos 源码分析02 注册_ide

核心实现如下

@Override
public void register(Registration registration) {
    // 判断serviceId是否为空，也就是spring.application.name不能为空
    if (StringUtils.isEmpty(registration.getServiceId())) {
        log.warn("No service to register for nacos client...");
        return;
    }
    // 获取Nacos的命名服务，其实就是注册中心服务
    NamingService namingService = namingService();
    // 获取 serviceId 和 Group
    String serviceId = registration.getServiceId();
    String group = nacosDiscoveryProperties.getGroup();
    // 封装服务实例的基本信息，如 cluster-name、是否为临时实例、权重、IP、端口等
    Instance instance = getNacosInstanceFromRegistration(registration);

    try {
        // 开始注册服务
        namingService.registerInstance(serviceId, group, instance);
        log.info("nacos registry, {} {} {}:{} register finished", group, serviceId,
                 instance.getIp(), instance.getPort());
    }
    catch (Exception e) {
        if (nacosDiscoveryProperties.isFailFast()) {
            log.error("nacos registry, {} register failed...{},", serviceId,
                      registration.toString(), e);
            rethrowRuntimeException(e);
        }
        else {
            log.warn("Failfast is false. {} register failed...{},", serviceId,
                     registration.toString(), e);
        }
    }
}

NacosNamingService 提供服务注册和订阅能力

@Override
    public void registerInstance(String serviceName, String groupName, Instance instance) throws NacosException {
        NamingUtils.checkInstanceIsLegal(instance);
        clientProxy.registerService(serviceName, groupName, instance);
    }