51 lines
1.5 KiB
Java
51 lines
1.5 KiB
Java
// files/TreeWatcher.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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import java.io.IOException;
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import java.nio.file.*;
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import static java.nio.file.StandardWatchEventKinds.*;
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import java.util.concurrent.*;
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public class TreeWatcher {
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static void watchDir(Path dir) {
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try {
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WatchService watcher =
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FileSystems.getDefault().newWatchService();
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dir.register(watcher, ENTRY_DELETE);
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Executors.newSingleThreadExecutor().submit(() -> {
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try {
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WatchKey key = watcher.take();
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for(WatchEvent evt : key.pollEvents()) {
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System.out.println(
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"evt.context(): " + evt.context() +
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"\nevt.count(): " + evt.count() +
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"\nevt.kind(): " + evt.kind());
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System.exit(0);
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}
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} catch(InterruptedException e) {
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return;
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}
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});
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} catch(IOException e) {
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throw new RuntimeException(e);
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}
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}
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public static void
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main(String[] args) throws Exception {
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Directories.refreshTestDir();
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Directories.populateTestDir();
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Files.walk(Paths.get("test"))
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.filter(Files::isDirectory)
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.forEach(TreeWatcher::watchDir);
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PathWatcher.delTxtFiles();
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}
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}
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/* Output:
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deleting test\bag\foo\bar\baz\File.txt
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evt.context(): File.txt
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evt.count(): 1
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evt.kind(): ENTRY_DELETE
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deleting test\bar\baz\bag\foo\File.txt
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*/
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