Fix link and Future complete

Author: amdelamar

cloudfoundry-example/README.adoc

@@ -1,8 +1,8 @@
 = Vert.x on Cloud Foundry
 
-This demo shows a very simple hello world Vert.x project for link:https://www.cloudfoundry.org/[Cloud Foundry]. It has a simple HTTP server which simply serves the /webroot/index.html.
+This demo shows a very simple hello world Vert.x project for link:https://www.cloudfoundry.org/[Cloud Foundry]. It has a simple HTTP server which simply serves the `/webroot/index.html`.
 
-This demo uses link:http://vertx.io/[Vert.x] and is packed using the official link:https://github.com/cloudfoundry/java-buildpack[CloudFoundry java-buildpack]. The `manifest.yml` specifies the app's memory to be 768MB because any lower and the java-buildpack throws an error that it can't allocate enough heap space. (See)
+This demo uses link:http://vertx.io/[Vert.x] and is packed using the official link:https://github.com/cloudfoundry/java-buildpack[CloudFoundry java-buildpack]. The `manifest.yml` specifies the app's memory to be 768MB because any lower and the java-buildpack throws an error that it can't allocate enough heap space. (See the link:https://www.cloudfoundry.org/certified-platforms/[list of certified platforms]).
 
 The environment variable `PORT` is normally provided by your CloudFoundry service, and therefore can change when being deployed. Otherwise the default port is `8080`.
 

cloudfoundry-example/src/main/java/hello/MainVerticle.java

@@ -34,7 +34,6 @@ public static void main(String[] args) {
 
     @Override
     public void start(Future<Void> startFuture) throws Exception {
-        super.start(startFuture);
 
         // PORT env check
         try {
@@ -56,15 +55,18 @@ public void start(Future<Void> startFuture) throws Exception {
         httpServer.listen(PORT, handler -> {
             if (handler.succeeded()) {
                 logger.info("Listening on port: " + PORT);
+                startFuture.complete();
             } else {
-                logger.error("Failed to bind on port " + PORT + ". Is it being used?");
+                String errorMessage = "Failed to bind on port " + PORT + ". Is it being used?";
+                logger.error(errorMessage);
+                startFuture.fail(errorMessage);
             }
         });
     }
 
     @Override
     public void stop(Future<Void> stopFuture) throws Exception {
-        super.stop(stopFuture);
         logger.info("Stopped listening on port: " + PORT);
+        stopFuture.complete();
     }
 }