futures-usage.java

        Future<Config> config = Feeds.getInstance().getConfig();

        Future<Home> homeData = config.flatMap(new Function<Config, Future<Home>>() {
            @Override
            public Future<Home> apply(Config input) {
                return Feeds.getInstance().getHome(input);
            }
        });

        homeData.onSuccess(new Callback<Home>() {
            @Override
            public void onCallback(Home value) {
                long now = System.currentTimeMillis();
                if (now - start < SPLASH_TIME) {
                    new Handler().postDelayed(homeRunner,
                            SPLASH_TIME - (now - start));
                } else {
                    homeRunner.run();
                }
            }
        });