1 /* 2 * Copyright (c) 2001, 2017, 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 * @test 26 * @bug 4421190 27 * @summary Tests that Image I/O statics may be referenced properly from 28 * multiple AppContexts, as would be the case for multiple Applets in a 29 * single VM. Each AppContext should get its own copy of the registry 30 * and the caching parameters in the ImageIO class. 31 * @modules java.desktop/sun.awt 32 */ 33 34 import java.io.File; 35 import java.io.IOException; 36 37 import javax.imageio.ImageIO; 38 import javax.imageio.spi.IIORegistry; 39 40 import sun.awt.SunToolkit; 41 42 class TestThread extends Thread { 43 44 IIORegistry registry; 45 boolean useCache; 46 File cacheDirectory; 47 boolean cacheSettingsOK = false; 48 String threadName; 49 50 boolean gotCrosstalk = false; 51 52 public TestThread(ThreadGroup tg, 53 boolean useCache, File cacheDirectory, 54 String threadName) { 55 super(tg, threadName); 56 this.useCache = useCache; 57 this.cacheDirectory = cacheDirectory; 58 this.threadName = threadName; 59 } 60 61 public void run() { 62 // System.out.println("Thread " + threadName + " in thread group " + 63 // getThreadGroup().getName()); 64 65 // Create a new AppContext as though we were an applet 66 SunToolkit.createNewAppContext(); 67 68 // Get default registry and store reference 69 this.registry = IIORegistry.getDefaultInstance(); 70 71 for (int i = 0; i < 10; i++) { 72 // System.out.println(threadName + 73 // ": setting cache parameters to " + 74 // useCache + ", " + cacheDirectory); 75 ImageIO.setUseCache(useCache); 76 ImageIO.setCacheDirectory(cacheDirectory); 77 78 try { 79 sleep(1000L); 80 } catch (InterruptedException e) { 81 } 82 83 // System.out.println(threadName + ": reading cache parameters"); 84 boolean newUseCache = ImageIO.getUseCache(); 85 File newCacheDirectory = ImageIO.getCacheDirectory(); 86 if (newUseCache != useCache || 87 newCacheDirectory != cacheDirectory) { 88 // System.out.println(threadName + ": got " + 89 // newUseCache + ", " + 90 // newCacheDirectory); 91 // System.out.println(threadName + ": crosstalk encountered!"); 92 gotCrosstalk = true; 93 } 94 } 95 } 96 97 public IIORegistry getRegistry() { 98 return registry; 99 } 100 101 public boolean gotCrosstalk() { 102 return gotCrosstalk; 103 } 104 } 105 106 public class AppContextTest { 107 108 public AppContextTest() { 109 ThreadGroup tg0 = new ThreadGroup("ThreadGroup0"); 110 ThreadGroup tg1 = new ThreadGroup("ThreadGroup1"); 111 112 TestThread t0 = 113 new TestThread(tg0, false, null, "TestThread 0"); 114 TestThread t1 = 115 new TestThread(tg1, true, new File("."), "TestThread 1"); 116 117 t0.start(); 118 t1.start(); 119 120 try { 121 t0.join(); 122 } catch (InterruptedException ie0) { 123 } 124 try { 125 t1.join(); 126 } catch (InterruptedException ie1) { 127 } 128 129 if (t0.gotCrosstalk() || t1.gotCrosstalk()) { 130 throw new RuntimeException("ImageIO methods had crosstalk!"); 131 } 132 133 if (t0.getRegistry() == t1.getRegistry()) { 134 throw new RuntimeException("ThreadGroups had same IIORegistry!"); 135 } 136 } 137 138 public static void main(String[] args) throws IOException { 139 new AppContextTest(); 140 } 141 }