sclass FixedRateTimer extends java.util.Timer implements AutoCloseable {

  *() { this(false); }

  *(bool daemon) { this(defaultTimerName(), daemon); }

  *(S name) { this(name, false); }

  *(S name, bool daemon) {

    super(name, daemon);

    _registerTimer(this);

  }

  L<Entry> entries = synchroList();

  srecord noeq Entry(TimerTask task, long firstTime, long period) {}

  // Note: not all methods overridden; only use these ones

  public void scheduleAtFixedRate(TimerTask task, long delay, long period) {

    entries.add(new Entry(task, now()+delay, period));

    super.scheduleAtFixedRate(task, delay, period);

  }

  public void cancel() {

    entries.clear();

    super.cancel();

  }

  public int purge() {

    entries.clear();

    ret super.purge();

  }

  FixedRateTimer changeRate(int newPeriod) {

    O r = ((SmartTimerTask) first(entries).task).r;

    cancel();

    ret doEvery(newPeriod, r);

  }

  close { cancel(); }

}