WebService(2)-AXIS高级特性 Handler特性

Handle 特性：假如客户端有一个请求，要记录某一个webservice被调用的次数，如果我们要把这个功能在webservice Object 里面去实现
不仅浸入了原来的程序，而且增加程序的不稳定性。

(1)?server-config.wsdd文件配置如下：
?<deployment xmlns="http://xml.apache.org/axis/wsdd/"
?xmlns:java="http://xml.apache.org/axis/wsdd/providers/java">
?<handler name="URLMapper" type="java:org.apache.axis.handlers.http.URLMapper" />??
?<handler name="wsTestHandler" type="java:cn.com.chenlly.ssh.webservice.axis.WSTestServiceHandle">//自定义一个handle
??? <parameter name="status" value="success"/>??????????????????????????????????????????
?</handler>
?<!-- 自定义服务 -->
?<service name="ws" provider="java:RPC">
?????? <parameter name="className"
?????? value="cn.com.chenlly.ssh.webservice.axis.WSTestServiceImpl"/>
?????? <parameter name="allowedMethods" value="*" />
?????? <parameter name="scope" value="request"/>
?????? <responseFlow>???????????????????? //如果handler配置在responseFlow,那么handler 会在service执行之后执行
??<handler type="wsTestHandler"/>
?????? </responseFlow>
?????? <requestFlow>????????????????????? //如果handler配置在requestFlow,那么handler 会在service执行之前执行
??<handler type="wsTestHandler"/>
?????? </requestFlow>
?</service>

?<transport name="http">
?????? <requestFlow>
?????? <handler type="URLMapper" />
?????? </requestFlow>
?</transport>
?</deployment>

?

(2)?WSTestServiceHandle.java类如下：
?package cn.com.chenlly.ssh.webservice.axis;
?import org.apache.axis.AxisFault;
?import org.apache.axis.MessageContext;
?import org.apache.axis.handlers.BasicHandler;

?/**
?* @Class WSTestServiceHandle.java
?* @Description? Handle类可以在每个webservice 方法被调用之前或者之后做一些事情
?* @Copyright (c) 2010,正辰科技有限公司 All rights reserved.
?* @Author Chenlly?
?* @Version 1.0
?* @Date Apr 19,2010 1:55:13 PM
?*/
?public class WSTestServiceHandle extends BasicHandler {

?private static long COUNT = 0L;

?private int requestCount = 0;

?@Override
?public void invoke(MessageContext arg0) throws AxisFault {
??requestCount++;
??COUNT++;
??String status = (String) this.getOption("status");//拿到配置文件中配置的属性值
??System.out.println(" status is:"+status+",count ="+COUNT+",requestCount = "+requestCount+"");
?}

?}

?//继承BasicHandler
?//MessageContext? AXIS 的上下文，存储AXIS和WebService 的基本信息

(3)?//执行两次WSTestServiceClient 后台结果如下：
?//服务器端：
?status is:success,count =1,requestCount = 1
?webService init.....
?status is:success,count =2,requestCount = 2

?status is:success,count =3,requestCount = 3?webService init.....?status is:success,count =4,requestCount = 4