monitoredoutputstream.java

来自「非常有影响的 j道 论 坛 源码 国外很有明的专家编写的 ....对java爱好」· Java 代码 · 共 69 行

/* Licence:
*   Use this however/wherever you like, just don't blame me if it breaks anything.
*
* Credit:
*   If you're nice, you'll leave this bit:
*
*   Class by Pierre-Alexandre Losson -- http://www.telio.be/blog
*   email : [e-mail]
*/
/*
*  Changed for Part 2, by Ken Cochrane
*  http://KenCochrane.net , http://CampRate.com , http://PopcornMonsters.com
*/
package com.jdon.jivejdon.presentation.servlet.upload.strutsplugin;

import org.apache.log4j.Logger;

import java.io.OutputStream;
import java.io.IOException;

/**
 * Created by IntelliJ IDEA.
 *
 */
public class MonitoredOutputStream extends OutputStream
{
    Logger log = Logger.getLogger(this.getClass());
    private OutputStream target;
    private OutputStreamListener listener;

    public MonitoredOutputStream(OutputStream target, OutputStreamListener listener)
    {
        log.debug("inside MonitoredOutputStream constructor ");
        this.target = target;
        this.listener = listener;
        this.listener.start();
        log.debug("leaving MonitoredOutputStream contructor ");
    }

    public void write(byte b[], int off, int len) throws IOException
    {
        target.write(b,off,len);
        listener.bytesRead(len - off);
    }

    public void write(byte b[]) throws IOException
    {
        target.write(b);
        listener.bytesRead(b.length);
    }

    public void write(int b) throws IOException
    {
        target.write(b);
        listener.bytesRead(1);
    }

    public void close() throws IOException
    {
        target.close();
        listener.done();
    }

    public void flush() throws IOException
    {
        target.flush();
    }
}