1 /*
   2  * Copyright (c) 2009, 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 /* @test
  25    @bug 6713352
  26    @summary Deadlock in JFileChooser with synchronized custom FileSystemView
  27    @author Pavel Porvatov
  28    @run main bug6713352
  29 */
  30 
  31 import sun.awt.shell.ShellFolder;
  32 
  33 import javax.swing.*;
  34 import javax.swing.filechooser.FileSystemView;
  35 import java.io.File;
  36 import java.io.FileNotFoundException;
  37 import java.io.IOException;
  38 
  39 public class bug6713352 {
  40     public static void main(String[] args) throws Exception {
  41         SwingUtilities.invokeAndWait(new Runnable() {
  42             public void run() {
  43                 String tempDir = System.getProperty("java.io.tmpdir");
  44 
  45                 if (tempDir == null || !new File(tempDir).isDirectory()) {
  46                     tempDir = System.getProperty("user.home");
  47                 }
  48 
  49                 MyFileSystemView systemView = new MyFileSystemView();
  50 
  51                 synchronized (systemView) { // Get SystemView lock
  52                     new JFileChooser(systemView);
  53 
  54                     // Wait a little bit. BasicDirectoryModel will lock Invoker and stop on
  55                     // the bug6713352.MyFileSystemView.getFiles() method
  56                     try {
  57                         Thread.sleep(5000);
  58                     } catch (InterruptedException e) {
  59                         throw new RuntimeException(e);
  60                     }
  61 
  62                     try {
  63                         System.out.println("Try to get Invokers lock");
  64 
  65                         ShellFolder.getShellFolder(new File(tempDir)).listFiles(true);
  66                     } catch (FileNotFoundException e) {
  67                         throw new RuntimeException(e);
  68                     }
  69                 }
  70 
  71                 // To avoid RejectedExecutionException in BasicDirectoryModel wait a second
  72                 try {
  73                     Thread.sleep(1000);
  74                 } catch (InterruptedException e) {
  75                     throw new RuntimeException(e);
  76                 }
  77             }
  78         });
  79     }
  80 
  81     private static class MyFileSystemView extends FileSystemView {
  82 
  83         public File createNewFolder(File containingDir) throws IOException {
  84             return null;
  85         }
  86 
  87         public File[] getFiles(File dir, boolean useFileHiding) {
  88             System.out.println("getFiles start");
  89 
  90             File[] result;
  91 
  92             synchronized (this) {
  93                 result = super.getFiles(dir, useFileHiding);
  94             }
  95 
  96             System.out.println("getFiles finished");
  97 
  98             return result;
  99         }
 100 
 101         public synchronized Boolean isTraversable(File f) {
 102             return super.isTraversable(f);
 103         }
 104     }
 105 }