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 DEFAULT_EXCHANGER = "header";
    public static final String DEFAULT_TRANSPORTER = "netty";
    public static final String DEFAULT_REMOTING_SERVER = "netty";
    public static final String DEFAULT_REMOTING_CLIENT = "netty";
    public static final String DEFAULT_REMOTING_CODEC = "dubbo";
    public static final String DEFAULT_REMOTING_SERIALIZATION = "hessian2";
    public static final String DEFAULT_HTTP_SERVER = "servlet";
    public static final String DEFAULT_HTTP_CLIENT = "jdk";
    public static final String DEFAULT_HTTP_SERIALIZATION = "json";
    public static final String DEFAULT_CHARSET = "UTF-8";
    public static final int DEFAULT_WEIGHT = 100;
    public static final int DEFAULT_FORKS = 2;
    public static final String DEFAULT_THREAD_NAME = "Dubbo";
    public static final int DEFAULT_CORE_THREADS = 0;
    public static final int DEFAULT_THREADS = 200;
    public static final boolean DEFAULT_KEEP_ALIVE = true;
    public static final int DEFAULT_QUEUES = 0;
    public static final int DEFAULT_ALIVE = 60 * 1000;
    /**
     * By default, a consumer JVM instance and a provider JVM instance share a long TCP connection (except when connections are set),
     * which can set the number of long TCP connections shared to avoid the bottleneck of sharing a single long TCP connection.
     */
    public static final String DEFAULT_SHARE_CONNECTIONS = "1";
    public static final String SHARE_CONNECTIONS_KEY = "shareconnections";
    public static final int DEFAULT_ACCEPTS = 0;
    public static final int DEFAULT_IDLE_TIMEOUT = 600 * 1000;
    public static final int DEFAULT_HEARTBEAT = 60 * 1000;
    public static final int DEFAULT_TIMEOUT = 1000;
    public static final int DEFAULT_CONNECT_TIMEOUT = 3000;
    /**