FileTreeModifier.java revision 3471:236e3f2d0a6b 
1/*
2 * Copyright (c) 2008, 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 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 = Files.createDirectories(top.resolve("a").resolve("b").resolve("c"));
66
67        // Test ENTRY_CREATE with FILE_TREE modifier.
68
69        WatchKey key = top.register(watcher,
70            new WatchEvent.Kind<?>[]{ ENTRY_CREATE }, FILE_TREE);
71
72        // create file in a/b/c and check we get create event
73        Path file = Files.createFile(subdir.resolve("foo"));
74        checkExpectedEvent(watcher, ENTRY_CREATE, top.relativize(file));
75        key.reset();
76
77        // Test ENTRY_DELETE with FILE_TREE modifier.
78
79        WatchKey k = top.register(watcher,
80            new WatchEvent.Kind<?>[]{ ENTRY_DELETE }, FILE_TREE);
81        if (k != key)
82            throw new RuntimeException("Existing key not returned");
83
84        // delete a/b/c/foo and check we get delete event
85        Files.delete(file);
86        checkExpectedEvent(watcher, ENTRY_DELETE, top.relativize(file));
87        key.reset();
88
89        // Test changing registration to ENTRY_CREATE without modifier
90
91        k = top.register(watcher, new WatchEvent.Kind<?>[]{ ENTRY_CREATE });
92        if (k != key)
93            throw new RuntimeException("Existing key not returned");
94
95        // create a/b/c/foo
96        Files.createFile(file);
97
98        // check that key is not queued
99        WatchKey nextKey;
100        try {
101            nextKey = watcher.poll(3, TimeUnit.SECONDS);
102        } catch (InterruptedException e) {
103            throw new RuntimeException();
104        }
105        if (nextKey != null)
106            throw new RuntimeException("WatchKey not expected to be polled");
107
108        // create bar and check we get create event
109        file = Files.createFile(top.resolve("bar"));
110        checkExpectedEvent(watcher, ENTRY_CREATE, top.relativize(file));
111        key.reset();
112
113        // Test changing registration to <all> with FILE_TREE modifier
114
115        k = top.register(watcher,
116            new WatchEvent.Kind<?>[]{ ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY },
117            FILE_TREE);
118        if (k != key)
119            throw new RuntimeException("Existing key not returned");
120
121        // modify bar and check we get modify event
122        try (OutputStream out = Files.newOutputStream(file)) {
123            out.write("Double shot expresso please".getBytes("UTF-8"));
124        }
125        checkExpectedEvent(watcher, ENTRY_MODIFY, top.relativize(file));
126        key.reset();
127    }
128
129
130    public static void main(String[] args) throws IOException {
131        if (!System.getProperty("os.name").startsWith("Windows")) {
132            System.out.println("This is Windows-only test at this time!");
133            return;
134        }
135
136        Path dir = TestUtil.createTemporaryDirectory();
137        try {
138            doTest(dir);
139        } finally {
140            TestUtil.removeAll(dir);
141        }
142    }
143}
144