对等网络节点组网器扩展

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

src
 |-main
    |-java
        |-com
            |-xxx
                |-XxxPageHandler.java (实现PageHandler接口)
    |-resources
        |-META-INF
            |-dubbo
                |-org.apache.dubbo.container.page.PageHandler (纯文本文件，内容为：xxx=com.xxx.XxxPageHandler)

package com.xxx;
 
import org.apache.dubbo.container.page.PageHandler;
 
public class XxxPageHandler implements PageHandler {
    public Group lookup(URL url) {
        // ...
    }
}

xxx=com.xxx.XxxPageHandler