try {
    final Path lock = Files.write(PATH_TO_FILE_IN_A_CONSTANT, "Executing Job", StandardOpenOption.CREATE, StandardOpenOption.WRITE);

    final RandomAccessFile raf = new RandomAccessFile(lock.toFile(), "r");
    FileLock fl = new FileInputStream(raf.getFD()).getChannel().lock(0, Long.MAX_VALUE, true);
} catch (final IOException e) {
    LOGGER.error("Error while trying to write file. ERROR: " + e.getMessage(), e);

    Runtime.getRuntime().exit(-1);
}