SensitivityModifier.java revision 893:f06f30b29f36 
1/*
2 * Copyright 2008-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 */
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
31import java.nio.file.*;
32import static java.nio.file.StandardWatchEventKind.*;
33import java.io.OutputStream;
34import java.io.IOException;
35import java.util.Random;
36import java.util.concurrent.TimeUnit;
37import com.sun.nio.file.SensitivityWatchEventModifier;
38
39public 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    static void doTest(Path top) throws Exception {
55        FileSystem fs = top.getFileSystem();
56        WatchService watcher = fs.newWatchService();
57
58        // create directories and files
59        int nDirs = 5 + rand.nextInt(20);
60        int nFiles = 50 + rand.nextInt(50);
61        Path[] dirs = new Path[nDirs];
62        Path[] files = new Path[nFiles];
63        for (int i=0; i<nDirs; i++) {
64            dirs[i] = top.resolve("dir" + i).createDirectory();
65        }
66        for (int i=0; i<nFiles; i++) {
67            Path dir = dirs[rand.nextInt(nDirs)];
68            files[i] = dir.resolve("file" + i).createFile();
69        }
70
71        // register the directories (random sensitivity)
72        register(dirs, watcher);
73
74        // sleep a bit here to ensure that modification to the first file
75        // can be detected by polling implementations (ie: last modified time
76        // may not change otherwise).
77        try { Thread.sleep(1000); } catch (InterruptedException e) { }
78
79        // modify files and check that events are received
80        for (int i=0; i<10; i++) {
81            Path file = files[rand.nextInt(nFiles)];
82            System.out.println("Modify: " + file);
83            OutputStream out = file.newOutputStream();
84            try {
85                out.write(new byte[100]);
86            } finally {
87                out.close();
88            }
89            System.out.println("Waiting for event...");
90            WatchKey key = watcher.take();
91            WatchEvent<?> event = key.pollEvents().iterator().next();
92            if (event.kind() != ENTRY_MODIFY)
93                throw new RuntimeException("Unexpected event: " + event);
94            Path name = ((WatchEvent<Path>)event).context();
95            if (!name.equals(file.getName()))
96                throw new RuntimeException("Unexpected context: " + name);
97            System.out.println("Event OK");
98
99            // drain events (to avoid interference)
100            do {
101                key.reset();
102                key = watcher.poll(1, TimeUnit.SECONDS);
103            } while (key != null);
104
105            // re-register the directories to force changing their sensitivity
106            // level
107            register(dirs, watcher);
108        }
109
110        // done
111        watcher.close();
112    }
113
114    public static void main(String[] args) throws Exception {
115        Path dir = TestUtil.createTemporaryDirectory();
116        try {
117            doTest(dir);
118        } finally {
119            TestUtil.removeAll(dir);
120        }
121    }
122}
123