streamredirectthread.java

jpda例子文件

/*
 * @(#)StreamRedirectThread.java	1.4 03/01/23
 *
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright (c) 1997-2001 by Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 * 
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear
 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */
package com.sun.tools.example.trace;

import java.io.*;

/**
 * StreamRedirectThread is a thread which copies it's input to
 * it's output and terminates when it completes.
 *
 * @version     @(#) StreamRedirectThread.java 1.4 03/01/23 21:22:26
 * @author Robert Field
 */
class StreamRedirectThread extends Thread {

    private final Reader in;
    private final Writer out;

    private static final int BUFFER_SIZE = 2048;

    /**
     * Set up for copy.
     * @param name  Name of the thread
     * @param in    Stream to copy from
     * @param out   Stream to copy to
     */
    StreamRedirectThread(String name, InputStream in, OutputStream out) {
	super(name);
	this.in = new InputStreamReader(in);
	this.out = new OutputStreamWriter(out);
	setPriority(Thread.MAX_PRIORITY-1);
    }

    /**
     * Copy.
     */
    public void run() {
        try {
	    char[] cbuf = new char[BUFFER_SIZE];
	    int count;
	    while ((count = in.read(cbuf, 0, BUFFER_SIZE)) >= 0) {
		out.write(cbuf, 0, count);
	    }
            out.flush();
	} catch(IOException exc) {
	    System.err.println("Child I/O Transfer - " + exc);
	}
    }
}