1 /* 2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @summary This is a utility for coordinating the flow of events on different 26 threads. 27 * @summary com.apple.junit.utils 28 */ 29 package test.java.awt.regtesthelpers; 30 31 public class Waypoint { 32 33 static final String MSG = "Waypoint timed out"; 34 // Wait up to five seconds for our clear() to be called 35 static final int TIMEOUT = 5000; 36 boolean clear = false; 37 38 public Waypoint() { 39 40 } 41 42 // 43 // Pause for either TIMEOUT millis or until clear() is called 44 // 45 synchronized public void requireClear() throws RuntimeException { 46 requireClear(MSG, TIMEOUT); 47 } 48 49 synchronized public void requireClear(long timeout) 50 throws RuntimeException { 51 requireClear(MSG, timeout); 52 } 53 54 synchronized public void requireClear(String timeOutMsg) 55 throws RuntimeException { 56 requireClear(timeOutMsg, TIMEOUT); 57 } 58 59 synchronized public void requireClear(String timeOutMsg, long timeout) 60 throws RuntimeException { 61 long endtime = System.currentTimeMillis() + timeout; 62 try { 63 while (isClear() == false) { 64 if (System.currentTimeMillis() < endtime) { 65 wait(200); 66 } else { 67 break; 68 } 69 } 70 71 if (!isClear()) { 72 throw new RuntimeException(timeOutMsg); 73 } 74 } catch (InterruptedException ix) { 75 } 76 } 77 78 // 79 // Called when it is valid to procede past the waypoint 80 // 81 synchronized public void clear() { 82 clear = true; 83 notify(); 84 } 85 86 // 87 // Should be checked after a call to requireClear() to make 88 // sure that we did not time out. 89 // 90 synchronized public boolean isClear() { 91 return clear; 92 } 93 94 synchronized public boolean isValid() { 95 return clear; 96 } 97 98 // 99 // For re-use of a waypoint. Be careful. 100 // 101 synchronized public void reset() { 102 clear = false; 103 } 104 105 }