Method proxyTo

future-java/src/main/java/io/trane/future/Promise.java:780–797

(final Promise<T> p)

  }

  @Override
  public final void proxyTo(final Promise<T> p) {
    if (p.isDefined())
      throw new IllegalStateException("Cannot call proxyTo on an already satisfied Promise.");

    final Responder<T> r = new Responder<T>() {
      @Override
      public final void onException(final Throwable ex) {
        p.setException(ex);
      }

      @Override
      public final void onValue(final T value) {
        p.setValue(value);
      }
    };
    respond(r);
  }

  private static final class WithinPromise<T> extends Promise<T> implements Responder<T>, Runnable {