@Inject注解

    @Inject
    public ApplicationInfoManager(EurekaInstanceConfig config, InstanceInfo instanceInfo, OptionalArgs optionalArgs) {
        this.config = config;
        this.instanceInfo = instanceInfo;
        this.listeners = new ConcurrentHashMap<String, StatusChangeListener>();
        if (optionalArgs != null) {
            this.instanceStatusMapper = optionalArgs.getInstanceStatusMapper();
        } else {
            this.instanceStatusMapper = NO_OP_MAPPER;
        }

        // Hack to allow for getInstance() to use the DI‘d ApplicationInfoManager
        instance = this;
    }