TheDoctor.java

public void test() throws TheDoctorException {
  long currentTimeMillis = System.currentTimeMillis();

  long lastTimeInMillis = getLastKnownTimestamp(currentTimeMillis);
  long tamperedTimeInMillis = getTamperedTimestamp(currentTimeMillis);
  // logger.debug("Last time: " + lastTimeInMillis + "; tampered time: " + tamperedTimeInMillis);

  if (currentTimeMillis < lastTimeInMillis - TIME_OFFSET
          || tamperedTimeInMillis < lastTimeInMillis - TIME_OFFSET) {
      block(tamperedTimeInMillis, lastTimeInMillis);
      // logger.warn("Somebody played with system time.");
      // logger.warn("It is now: " + currentTimeMillis);
      // logger.warn("Was last time: " + lastTimeInMillis);
      // logger.warn("And once it was: " + tamperedTimeInMillis);
      throw new TheDoctorException("I'm the Doctor. "
              + "I'm a Time Lord. "
              + "I'm from the planet Gallifrey in the constellation of Kasterborous. "
              + "I am 903 years old and I'm the man who's gonna save your lives, and all six billion people on the planet below. "
              + "You got a problem with that?"
              + "\nIt is now: " + currentTimeMillis
              + "\nWas last time: " + lastTimeInMillis
              + "\nAnd once it was: " + tamperedTimeInMillis);
  } else {
      block(null, currentTimeMillis);
  }
}