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 }