loghandler.java

< J2EE应用开发详解>>一书全部的源代码. 本书基于J2EE 1．4平台

package com.j2ee14.ch20;

import java.util.*;
import javax.xml.namespace.QName;
import javax.xml.rpc.handler.soap.SOAPMessageContext;
import javax.xml.rpc.JAXRPCException;
import javax.xml.rpc.handler.*;
import javax.xml.soap.*;
import java.io.*;

/**
 * 用于做访问日志的Handler
 */
public class LogHandler extends GenericHandler {
    
    private QName [] qnames;
    private String fileName;
    
    public void init(HandlerInfo info) {
        qnames = info.getHeaders();

            //获得初始参数
        fileName = (String) info.getHandlerConfig().get("fileName");
        System.out.println("LogHandler: fileName = " + fileName);
    }
    
    /*
     * 这是GenericHandler中的抽象方法，必须实现。.
     */ 
    public QName[] getHeaders() {
        return qnames;
    }
    
     /**
     *处理请求
     */
    public boolean handleRequest(MessageContext msgContext) {
        try {
            
            FileOutputStream fos = new FileOutputStream(fileName, true);            
            PrintWriter writer = new PrintWriter(fos);            
            String remoteIp=(String)msgContext.getProperty("ipAddr");            
            Date date = new Date();           
            String result = "在"+date + ": Web 服务被调用，客户的ip地址是：" + remoteIp + ".";           
            writer.println(result);            
            writer.close();
            
        } catch (Exception e) {
            throw new JAXRPCException(e);
        }

        return true;//返回true，继续处理soap消息            
    }
    
}