Load Balance Extension

<dubbo:protocol loadbalance="xxx" />
<!-- Default value settings, when <dubbo:protocol> does not configure loadbalance, this configuration is used -->
<dubbo:provider loadbalance="xxx" />

src
 |-main
    |-java
        |-com
            |-xxx
                |-XxxLoadBalance.java (implements LoadBalance interface)
    |-resources
        |-META-INF
            |-dubbo
                |-org.apache.dubbo.rpc.cluster.LoadBalance (plain text file, content: xxx=com.xxx.XxxLoadBalance)

package com.xxx;
 
import org.apache.dubbo.rpc.cluster.LoadBalance;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.Invocation;
import org.apache.dubbo.rpc.RpcException; 
 
public class XxxLoadBalance implements LoadBalance {
    public <T> Invoker<T> select(List<Invoker<T>> invokers, Invocation invocation) throws RpcException {
        // ...
    }
}

xxx=com.xxx.XxxLoadBalance