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 }