动态代理扩展

<dubbo:protocol proxy="xxx" />
<!-- 缺省值配置，当<dubbo:protocol>没有配置proxy属性时，使用此配置 -->
<dubbo:provider proxy="xxx" />

src
 |-main
    |-java
        |-com
            |-xxx
                |-XxxProxyFactory.java (实现ProxyFactory接口)
    |-resources
        |-META-INF
            |-dubbo
                |-org.apache.dubbo.rpc.ProxyFactory (纯文本文件，内容为：xxx=com.xxx.XxxProxyFactory)

package com.xxx;
 
import org.apache.dubbo.rpc.ProxyFactory;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.RpcException;
 
 
public class XxxProxyFactory implements ProxyFactory {
    public <T> T getProxy(Invoker<T> invoker) throws RpcException {
        // ...
    }
    public <T> Invoker<T> getInvoker(T proxy, Class<T> type, URL url) throws RpcException {
        // ...
    }
}

xxx=com.xxx.XxxProxyFactory