dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/loadbalance/
ConsistentHashLoadBalance.java
![image](https://user-images.githubusercontent.com/30815149/55045041-740f4980-5077-11e9-8b6c-7a2b18b0d58e.png)
我看其他地方都是用Constants进行替换，这里是不是可以使用Constants类里的属性进行替换
public static final String DUBBO = "dubbo";
    public static final String PROVIDER = "provider";
    public static final String CONSUMER = "consumer";
    public static final String REGISTER = "register";
    public static final String UNREGISTER = "unregister";
    public static final String SUBSCRIBE = "subscribe";
    public static final String UNSUBSCRIBE = "unsubscribe";
    public static final String CATEGORY_KEY = "category";
    public static final String PROVIDERS_CATEGORY = "providers";
    public static final String CONSUMERS_CATEGORY = "consumers";
    public static final String ROUTERS_CATEGORY = "routers";
    public static final String DYNAMIC_ROUTERS_CATEGORY = "dynamicrouters";
    public static final String CONFIGURATORS_CATEGORY = "configurators";
    public static final String DYNAMIC_CONFIGURATORS_CATEGORY = "dynamicconfigurators";
    public static final String APP_DYNAMIC_CONFIGURATORS_CATEGORY = "appdynamicconfigurators";
    public static final String CONFIGURATORS_SUFFIX = ".configurators";
    public static final String ROUTERS_SUFFIX = ".routers";
    public static final String CONFIG_CLUSTER_KEY = "config.cluster";