Method within

future-java/src/main/java/io/trane/future/Promise.java:836–845

(final Duration timeout, final ScheduledExecutorService scheduler,
      final Throwable exception)

  }

  @Override
  public final Future<T> within(final Duration timeout, final ScheduledExecutorService scheduler,
      final Throwable exception) {
    if (timeout.toMillis() == Long.MAX_VALUE)
      return this;

    final WithinPromise<T> p = new WithinPromise<>(this, timeout, scheduler, exception);
    respond(p);
    return p;
  }

  protected String toStringPrefix() {
    return "Promise";