Yurttas/PL/OOL/Java/F/07/03/NotifyUtil.java

 1/**
 2 *  Copyright(C) 1998
 3 *  All Rights Reserved. Salih Yurttas, ZCubes, BitsOfCode Software Systems, Inc..
 4 *
 5 *  Permission to use, copy, modify, and distribute this
 6 *  software and its documentation for EDUCATIONAL purposes
 7 *  and without fee is hereby granted provided that this
 8 *  copyright notice appears in all copies.
 9 *
10 *  @date   : January 1, 1998.
11 *  @author : Salih Yurttas.
12 */
13
14
15public class NotifyUtil {
16
17  private boolean value = false;
18
19  private Object valueLock = new Object();
20
21  public void waitToProceed() {
22    System.out.println("Sleeper :  Entering wait to proceed");
23
24    try {
25      synchronized(valueLock) {
26        while(!value)
27          valueLock.wait();
28      }
29    }
30    catch(InterruptedException waitExcept) {
31      System.out.println("Interrupted while waiting");
32    }
33
34    System.out.println("Sleeper :  Exiting wait to proceed");
35  }
36
37  public void proceed() {
38    System.out.println("Waker : Entering proceed");
39
40    synchronized(valueLock) {
41      value=true;
42      valueLock.notify();
43    }
44
45    System.out.println("Waker : Exiting proceed");
46  }
47
48}