1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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.
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   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  *
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  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
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  23 
  24 /* @test
  25  * @bug 4313887
  26  * @summary Sanity test for Sun-specific sensitivyt level watch event modifier
  27  * @library ..
  28  * @run main/timeout=330 Basic
  29  */
  30 
  31 import java.nio.file.*;
  32 import static java.nio.file.StandardWatchEventKind.*;
  33 import java.io.OutputStream;
  34 import java.io.IOException;
  35 import java.util.Random;
  36 import java.util.concurrent.TimeUnit;
  37 import com.sun.nio.file.SensitivityWatchEventModifier;
  38 
  39 public class SensitivityModifier {
  40 
  41     static final Random rand = new Random();
  42 
  43     static void register(Path[] dirs, WatchService watcher) throws IOException {
  44         SensitivityWatchEventModifier[] sensitivtives =
  45             SensitivityWatchEventModifier.values();
  46         for (int i=0; i<dirs.length; i++) {
  47             SensitivityWatchEventModifier sensivity =
  48                 sensitivtives[ rand.nextInt(sensitivtives.length) ];
  49             Path dir = dirs[i];
  50             dir.register(watcher, new WatchEvent.Kind<?>[]{ ENTRY_MODIFY }, sensivity);
  51         }
  52     }
  53 
  54     @SuppressWarnings("unchecked")
  55     static void doTest(Path top) throws Exception {
  56         FileSystem fs = top.getFileSystem();
  57         WatchService watcher = fs.newWatchService();
  58 
  59         // create directories and files
  60         int nDirs = 5 + rand.nextInt(20);
  61         int nFiles = 50 + rand.nextInt(50);
  62         Path[] dirs = new Path[nDirs];
  63         Path[] files = new Path[nFiles];
  64         for (int i=0; i<nDirs; i++) {
  65             dirs[i] = Files.createDirectory(top.resolve("dir" + i));
  66         }
  67         for (int i=0; i<nFiles; i++) {
  68             Path dir = dirs[rand.nextInt(nDirs)];
  69             files[i] = Files.createFile(dir.resolve("file" + i));
  70         }
  71 
  72         // register the directories (random sensitivity)
  73         register(dirs, watcher);
  74 
  75         // sleep a bit here to ensure that modification to the first file
  76         // can be detected by polling implementations (ie: last modified time
  77         // may not change otherwise).
  78         try { Thread.sleep(1000); } catch (InterruptedException e) { }
  79 
  80         // modify files and check that events are received
  81         for (int i=0; i<10; i++) {
  82             Path file = files[rand.nextInt(nFiles)];
  83             System.out.println("Modify: " + file);
  84             try (OutputStream out = Files.newOutputStream(file)) {
  85                 out.write(new byte[100]);
  86             }
  87             System.out.println("Waiting for event...");
  88             WatchKey key = watcher.take();
  89             WatchEvent<?> event = key.pollEvents().iterator().next();
  90             if (event.kind() != ENTRY_MODIFY)
  91                 throw new RuntimeException("Unexpected event: " + event);
  92             Path name = ((WatchEvent<Path>)event).context();
  93             if (!name.equals(file.getFileName()))
  94                 throw new RuntimeException("Unexpected context: " + name);
  95             System.out.println("Event OK");
  96 
  97             // drain events (to avoid interference)
  98             do {
  99                 key.reset();
 100                 key = watcher.poll(1, TimeUnit.SECONDS);
 101             } while (key != null);
 102 
 103             // re-register the directories to force changing their sensitivity
 104             // level
 105             register(dirs, watcher);
 106         }
 107 
 108         // done
 109         watcher.close();
 110     }
 111 
 112     public static void main(String[] args) throws Exception {
 113         Path dir = TestUtil.createTemporaryDirectory();
 114         try {
 115             doTest(dir);
 116         } finally {
 117             TestUtil.removeAll(dir);
 118         }
 119     }
 120 }