[jermo]

From https://groups.google.com/forum/#!msg/vertx/xgGgQcDeX04/0q8C...

Here are some of the highlights of Vert.x 3:

  * A new and improved core API providing HTTP, SSL, TCP, UDP, DNS, WebSockets, File System, Event Bus, distributed maps, clustered locks, clustered counters and many more features  
  * Introducing Vert.x-Web http://vertx.io/docs/#web - a new toolkit for creating any type of web application from traditional server rendered apps, to modern client rendered apps, real-time apps, REST apps and HTTP micro services.  
  * Pluggable authentication/authorisation with out of the box implementations using JDBC, MongoDB, JWT and Shiro  
  * Pluggable metrics with an out of the box implementation using DropWizard metrics  
  * Database connectivity for MongoDB, Redis and JDBC  
  * Integration with SMTP mail and a JCA adaptor for interop with JavaEE app servers (e.g. WildFly)  
  * RxJava style APIs if you don't like callbacks  
  * Reactive Streams implementation http://www.reactive-streams.org/ for interop with other reactive systems (e.g. Akka)  
  * Introducing Vertx-Unit - a test toolkit for writing async tests  
  * Codegen of Java APIs into idiomatic APIs in other languages - including JavaScript, Ruby and Groovy  
  * Completely embeddable  
  * Simpler classloading model  
  * Docker images and support for Red Hat OpenShift  
  * Faster than ever