1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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 
  30 import java.nio.file.*;
  31 import static java.nio.file.StandardWatchEventKind.*;
  32 import java.io.IOException;
  33 import java.io.OutputStream;
  34 import java.util.*;
  35 import java.util.concurrent.*;
  36 import static com.sun.nio.file.ExtendedWatchEventModifier.*;
  37 
  38 public 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 }