/** @param workTokDir Token directory (common for multiple nodes). */
    private void cleanupResources(File workTokDir) {
      RandomAccessFile lockFile = null;

      FileLock lock = null;

      try {
        lockFile = new RandomAccessFile(new File(workTokDir, LOCK_FILE_NAME), "rw");

        lock = lockFile.getChannel().lock();

        if (lock != null) processTokenDirectory(workTokDir);
        else if (log.isDebugEnabled())
          log.debug(
              "Token directory is being processed concurrently: " + workTokDir.getAbsolutePath());
      } catch (OverlappingFileLockException ignored) {
        if (log.isDebugEnabled())
          log.debug(
              "Token directory is being processed concurrently: " + workTokDir.getAbsolutePath());
      } catch (FileLockInterruptionException ignored) {
        Thread.currentThread().interrupt();
      } catch (IOException e) {
        U.error(log, "Failed to process directory: " + workTokDir.getAbsolutePath(), e);
      } finally {
        U.releaseQuiet(lock);
        U.closeQuiet(lockFile);
      }
    }
예제 #2
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  /**
   * Decode file charset.
   *
   * @param f File to process.
   * @return File charset.
   * @throws IOException in case of error.
   */
  public static Charset decode(File f) throws IOException {
    SortedMap<String, Charset> charsets = Charset.availableCharsets();

    String[] firstCharsets = {
      Charset.defaultCharset().name(), "US-ASCII", "UTF-8", "UTF-16BE", "UTF-16LE"
    };

    Collection<Charset> orderedCharsets = U.newLinkedHashSet(charsets.size());

    for (String c : firstCharsets)
      if (charsets.containsKey(c)) orderedCharsets.add(charsets.get(c));

    orderedCharsets.addAll(charsets.values());

    try (RandomAccessFile raf = new RandomAccessFile(f, "r")) {
      FileChannel ch = raf.getChannel();

      ByteBuffer buf = ByteBuffer.allocate(4096);

      ch.read(buf);

      buf.flip();

      for (Charset charset : orderedCharsets) {
        CharsetDecoder decoder = charset.newDecoder();

        decoder.reset();

        try {
          decoder.decode(buf);

          return charset;
        } catch (CharacterCodingException ignored) {
        }
      }
    }

    return Charset.defaultCharset();
  }