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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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22 */
23
24/* @test
25 * @bug 4313887 6838333
26 * @summary Sanity test for JDK-specific FILE_TREE watch event modifier
27 * @library ..
28 * @modules jdk.unsupported
29 */
30
31import java.nio.file.*;
32import static java.nio.file.StandardWatchEventKinds.*;
33import java.io.IOException;
34import java.io.OutputStream;
35import java.util.*;
36import java.util.concurrent.*;
37import static com.sun.nio.file.ExtendedWatchEventModifier.*;
38
39public class FileTreeModifier {
40
41    static void checkExpectedEvent(WatchService watcher,
42                                   WatchEvent.Kind<?> expectedType,
43                                   Object expectedContext)
44    {
45        WatchKey key;
46        try {
47            key = watcher.take();
48        } catch (InterruptedException x) {
49            // should not happen
50            throw new RuntimeException(x);
51        }
52        WatchEvent<?> event = key.pollEvents().iterator().next();
53        System.out.format("Event: type=%s, count=%d, context=%s\n",
54            event.kind(), event.count(), event.context());
55        if (event.kind() != expectedType)
56            throw new RuntimeException("unexpected event");
57        if (!expectedContext.equals(event.context()))
58            throw new RuntimeException("unexpected context");
59    }
60
61    static void doTest(Path top) throws IOException {
62        FileSystem fs = top.getFileSystem();
63        WatchService watcher = fs.newWatchService();
64
65        // create directories
66        Path subdir = Files.createDirectories(top.resolve("a").resolve("b").resolve("c"));
67
68        // Test ENTRY_CREATE with FILE_TREE modifier.
69
70        WatchKey key = top.register(watcher,
71            new WatchEvent.Kind<?>[]{ ENTRY_CREATE }, FILE_TREE);
72
73        // create file in a/b/c and check we get create event
74        Path file = Files.createFile(subdir.resolve("foo"));
75        checkExpectedEvent(watcher, ENTRY_CREATE, top.relativize(file));
76        key.reset();
77
78        // Test ENTRY_DELETE with FILE_TREE modifier.
79
80        WatchKey k = top.register(watcher,
81            new WatchEvent.Kind<?>[]{ ENTRY_DELETE }, FILE_TREE);
82        if (k != key)
83            throw new RuntimeException("Existing key not returned");
84
85        // delete a/b/c/foo and check we get delete event
86        Files.delete(file);
87        checkExpectedEvent(watcher, ENTRY_DELETE, top.relativize(file));
88        key.reset();
89
90        // Test changing registration to ENTRY_CREATE without modifier
91
92        k = top.register(watcher, new WatchEvent.Kind<?>[]{ ENTRY_CREATE });
93        if (k != key)
94            throw new RuntimeException("Existing key not returned");
95
96        // create a/b/c/foo
97        Files.createFile(file);
98
99        // check that key is not queued
100        WatchKey nextKey;
101        try {
102            nextKey = watcher.poll(3, TimeUnit.SECONDS);
103        } catch (InterruptedException e) {
104            throw new RuntimeException();
105        }
106        if (nextKey != null)
107            throw new RuntimeException("WatchKey not expected to be polled");
108
109        // create bar and check we get create event
110        file = Files.createFile(top.resolve("bar"));
111        checkExpectedEvent(watcher, ENTRY_CREATE, top.relativize(file));
112        key.reset();
113
114        // Test changing registration to <all> with FILE_TREE modifier
115
116        k = top.register(watcher,
117            new WatchEvent.Kind<?>[]{ ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY },
118            FILE_TREE);
119        if (k != key)
120            throw new RuntimeException("Existing key not returned");
121
122        // modify bar and check we get modify event
123        try (OutputStream out = Files.newOutputStream(file)) {
124            out.write("Double shot expresso please".getBytes("UTF-8"));
125        }
126        checkExpectedEvent(watcher, ENTRY_MODIFY, top.relativize(file));
127        key.reset();
128    }
129
130
131    public static void main(String[] args) throws IOException {
132        if (!System.getProperty("os.name").startsWith("Windows")) {
133            System.out.println("This is Windows-only test at this time!");
134            return;
135        }
136
137        Path dir = TestUtil.createTemporaryDirectory();
138        try {
139            doTest(dir);
140        } finally {
141            TestUtil.removeAll(dir);
142        }
143    }
144}
145