/* * * Copyright (c) 2007, Sun Microsystems, Inc. * * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *  * Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. *  * Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. *  * Neither the name of Sun Microsystems nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */package socket;import java.io.IOException;import java.io.OutputStream;public class Sender extends Thread {    private OutputStream os;    private String message;    public Sender(OutputStream os) {	this.os = os;	start();    }    public synchronized void send(String msg) {	message = msg;	notify();    }    public synchronized void run() {	while (true) {	    // If no client to deal, wait until one connects	    if (message == null) {		try {		    wait();		} catch (InterruptedException e) {		}	    }	    if (message == null) {		break;	    }	    try {		os.write(message.getBytes());		os.write("\r\n".getBytes());	    } catch (IOException ioe) {		ioe.printStackTrace();	    }	    // Completed client handling, return handler to pool and	    // mark for wait	    message = null;	}    }    public synchronized void stop() {	message = null;	notify();    }}