netty-tomcat-sample/rpc-client-v3/src/main/java/cn/hhj/balance/AbstractLoadBalance.java

package cn.hhj.balance;

import java.util.List;

public abstract class AbstractLoadBalance implements LoadBalanceStrategy {
    @Override
    public String selectHost(List<String> repos) {
        // repos可能为空， 可能只有一个。
        if(repos==null||repos.size()==0){
            return null;
        }
        if(repos.size()==1){
            return repos.get(0);
        }
        return doSelect(repos);
    }

    protected abstract String doSelect(List<String> repos);

}