A fun example of using the Vert.x Event Bus to bridge the audience's mobile phone browser to the server and then to a dashboard. Allows for multi-user Finger Painting. Make sure index.html and dashboard.html are pointing at localhost:8080 and not some other URL that I might have been experimenting with.
mvn clean compile package
java -jar target/vertx-paint-1.0-SNAPSHOT.jar
Browser #1: http://localhost:8080
Browser #2: http://localhost:8080/dashboard.html