SensitivityModifier.java revision 6073:cea72c2bf071 
1/*
2 * Copyright (c) 2008, 2012, 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 4313887
26 * @summary Sanity test for Sun-specific sensitivity level watch event modifier
27 * @library ..
28 * @run main/timeout=240 SensitivityModifier
29 */
30
31import java.nio.file.*;
32import static java.nio.file.StandardWatchEventKinds.*;
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    @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.pollEvents();
100                key.reset();
101                key = watcher.poll(1, TimeUnit.SECONDS);
102            } while (key != null);
103
104            // re-register the directories to force changing their sensitivity
105            // level
106            register(dirs, watcher);
107        }
108
109        // done
110        watcher.close();
111    }
112
113    public static void main(String[] args) throws Exception {
114        Path dir = TestUtil.createTemporaryDirectory();
115        try {
116            doTest(dir);
117        } finally {
118            TestUtil.removeAll(dir);
119        }
120    }
121}
122