// Create the vert.x executor for callbacks to run on the vert.x event loop
        VertxExecutor executor = new VertxExecutor(vertx);
        when = WhenFactory.createFor(() -> executor);

        whenVertx = new DefaultWhenVertx(vertx, when);
        whenEventBus = new DefaultWhenEventBus(vertx, when);
        whenHttpClient = new DefaultWhenHttpClient(vertx, when);

whenVertx.deployVerticle("com.englishtown.vertx.TestVerticle")
    .then(deploymentID -> {
        // On success
        return null;
    })
    .otherwise(t -> {
        // On fail
        return null;
    });

List<Promise<String>> promises = new ArrayList<>();

promises.add(vertxWhen.deployVerticle("com.englishtown.vertx.TestVerticle1"));
promises.add(vertxWhen.deployVerticle("com.englishtown.vertx.TestVerticle2"));

when.all(promises)
    .then(deploymentIDs -> {
        // Handle success
        return null;
    })
    .otherwise(t -> {
        // Handle failure
        return null;
    });

List<Promise<Message<JsonObject>>> promises = new ArrayList<>();

promises.add(whenEventBus.<JsonObject>send("et.vertx.eb.1", new JsonObject().putString("message", "hello")));
promises.add(whenEventBus.<JsonObject>send("et.vertx.eb.2", new JsonObject().putString("message", "world")));

when.all(promises).then(
        replies -> {
            // On success
            return null;
        },
        t -> {
            // On fail
            return null;
        });

List<Promise<HttpClientResponse>> promises = new ArrayList<>();

promises.add(whenHttpClient.requestAbs(HttpMethod.GET, "http://test.englishtown.com/test1", new RequestOptions()));
promises.add(whenHttpClient.requestAbs(HttpMethod.POST, "http://test.englishtown.com/test2", new RequestOptions()));

when.all(promises).then(
        responses -> {
            // On success
            return null;
        },
        t -> {
            // On fail
            return null;
        }
);

RequestOptions options = new RequestOptions().setPauseResponse(true);
whenHttpClient.requestAbs(HttpMethod.GET, "http://localhost:8081/test", options)
    .then(response -> {
        return whenHttpClient.body(response);
    })
    .then(body -> {
        // Do something with the body
        return null;
    })
    .otherwise(t ->
        // On fail
        return null;
    });