FileTreeModifier.java revision 1319:5208d0c90d73 
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 6838333
26 * @summary Sanity test for Sun-specific FILE_TREE watch event modifier
27 * @library ..
28 */
29
30import java.nio.file.*;
31import static java.nio.file.StandardWatchEventKind.*;
32import java.io.IOException;
33import java.io.OutputStream;
34import java.util.*;
35import java.util.concurrent.*;
36import static com.sun.nio.file.ExtendedWatchEventModifier.*;
37
38public class FileTreeModifier {
39
40    static void checkExpectedEvent(WatchService watcher,
41                                   WatchEvent.Kind<?> expectedType,
42                                   Object expectedContext)
43    {
44        WatchKey key;
45        try {
46            key = watcher.take();
47        } catch (InterruptedException x) {
48            // should not happen
49            throw new RuntimeException(x);
50        }
51        WatchEvent<?> event = key.pollEvents().iterator().next();
52        System.out.format("Event: type=%s, count=%d, context=%s\n",
53            event.kind(), event.count(), event.context());
54        if (event.kind() != expectedType)
55            throw new RuntimeException("unexpected event");
56        if (!expectedContext.equals(event.context()))
57            throw new RuntimeException("unexpected context");
58    }
59
60    static void doTest(Path top) throws IOException {
61        FileSystem fs = top.getFileSystem();
62        WatchService watcher = fs.newWatchService();
63
64        // create directories
65        Path subdir = top
66           .resolve("a").createDirectory()
67           .resolve("b").createDirectory()
68           .resolve("c").createDirectory();
69
70        // Test ENTRY_CREATE with FILE_TREE modifier.
71
72        WatchKey key = top.register(watcher,
73            new WatchEvent.Kind<?>[]{ ENTRY_CREATE }, FILE_TREE);
74
75        // create file in a/b/c and check we get create event
76        Path file = subdir.resolve("foo").createFile();
77        checkExpectedEvent(watcher, ENTRY_CREATE, top.relativize(file));
78        key.reset();
79
80        // Test ENTRY_DELETE with FILE_TREE modifier.
81
82        WatchKey k = top.register(watcher,
83            new WatchEvent.Kind<?>[]{ ENTRY_DELETE }, FILE_TREE);
84        if (k != key)
85            throw new RuntimeException("Existing key not returned");
86
87        // delete a/b/c/foo and check we get delete event
88        file.delete();
89        checkExpectedEvent(watcher, ENTRY_DELETE, top.relativize(file));
90        key.reset();
91
92        // Test changing registration to ENTRY_CREATE without modifier
93
94        k = top.register(watcher, new WatchEvent.Kind<?>[]{ ENTRY_CREATE });
95        if (k != key)
96            throw new RuntimeException("Existing key not returned");
97
98        // create a/b/c/foo
99        file.createFile();
100
101        // check that key is not queued
102        try {
103            k = watcher.poll(3, TimeUnit.SECONDS);
104        } catch (InterruptedException e) {
105            throw new RuntimeException();
106        }
107        if (k != null)
108            throw new RuntimeException("WatchKey not expected to be polled");
109
110        // create bar and check we get create event
111        file = top.resolve("bar").createFile();
112        checkExpectedEvent(watcher, ENTRY_CREATE, top.relativize(file));
113        key.reset();
114
115        // Test changing registration to <all> with FILE_TREE modifier
116
117        k = top.register(watcher,
118            new WatchEvent.Kind<?>[]{ ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY },
119            FILE_TREE);
120        if (k != key)
121            throw new RuntimeException("Existing key not returned");
122
123        // modify bar and check we get modify event
124        OutputStream out = file.newOutputStream();
125        try {
126            out.write("Double shot expresso please".getBytes("UTF-8"));
127        } finally {
128            out.close();
129        }
130        checkExpectedEvent(watcher, ENTRY_MODIFY, top.relativize(file));
131        key.reset();
132    }
133
134
135    public static void main(String[] args) throws IOException {
136        if (!System.getProperty("os.name").startsWith("Windows")) {
137            System.out.println("This is Windows-only test at this time!");
138            return;
139        }
140
141        Path dir = TestUtil.createTemporaryDirectory();
142        try {
143            doTest(dir);
144        } finally {
145            TestUtil.removeAll(dir);
146        }
147    }
148}
149