The document summarizes the author's journey learning JavaScript and the evolution of JavaScript as a serious programming language. It discusses the author's initial denial and fear of JavaScript, but then growing curiosity. It outlines quotes from early critics of JavaScript becoming more positive over time. It also introduces concepts like single page applications, Nashorn (JavaScript runtime on the JVM), and Project Avatar (Oracle's effort to bring Node.js capabilities to the JVM).

1. Best Friends?
jonas.bandi@gmail.com Twitter: @jbandi

2. <Experimental
Code>

3. D
Jonas Bandi
5 Years ago I had no
clue about JavaScript
Today JavaScript pays my bills

4. My Journey into JavaScript Land

5. I went through the five
stages of grief.

6. Denial

8. Fear

9. Repulsion

10. Curiosity

13. Most of the people writing in JavaScript are not programmers.
They lack the training and discipline to write good programs.
- Douglas Crockford, 2001
The ecosystem around JavaScript as a serious application
platform continues to evolve.
- ThoughtWorks Technology Radar, January 2014
A very large group of developers still thinks of JavaScript as a
joke.
- Davy Brion, 2011
We strongly suggest to adopt JavaScript as a first class language.
- ThoughtWorks Technology Radar, 2011
Through 2014, improved JavaScript performance will begin to
push HTML5 and the browser as a mainstream enterprise
application development environment.
- Gartner, October 2013

14. Two Worlds?

15. Any application that can be written in
JavaScript, will eventually be written
in JavaScript.
- Atwood’s Law, 2007

16. We are slaves to JavaScript because
people have simply started to accept
its weirdness and flaws, much like a
Stockholm Syndrome phenomenon.
- Chris Richardson, 2013

17. Best Friends

18. JavaScript is the Language of the Web.
Another software technology will come
along and kill off the web. That judgement
day will arrive very soon.
-Forrester Research in 2000
The Web has won!

19. HTML 5
HTML5 explained:
• Html is the structure
• CSS is the colour and
style
• JavaScript is everything
else
Scott Hanselman:Angle Brackets, Curly Braces http://channel9.msdn.com/Events/Build/2012/3-027

20. SPA Architecture
View
Model
Controller
Services
ClientServer
clear boundary
"object model"
• Rich client
programming model in
the browser
• Clear separation of
concern between
client and server

21. JAVA EE

22. JAVA EE

23. JAVA EE 8: MVC (JSR 371)
http://www.oracle.com/technetwork/articles/java/mvc-2280472.html
JSFToday
MVC in Java EE 8

24. DEMO: Debugging
Seamless debugging between client and server with IntelliJ

25. Nashorn

26. JAVA SHIPS WITH JAVASCRIPT
• Since Java SE 6, the JDK contains a JavaScript
runtime.
• In the JRE: Mozilla Rhino (JSR-223 or proprietary API)
• In the JDK: jrunscript
• Java 8 contains Nashorn
• A completely rewritten JavaScript runtime on the JVM
• Supports ECMAScript 5 and will support ECMAScript 6

27. DEMO: JJS
System scripting
Scripting Java
Scripting a Java FX application

28. Demo:
Embedding Nashorn
Basic constructs: ScriptEngine, Invocable, Compilable
A simple DSL realized in JavaScript
Shared validation logic between client and server

29. Sharing Logic between
Client and Server
View
Controller
Client
Server
Business Logic "Code
Repository"
Model

30. Project Avatar

32. Clients(
Event(Loop(
(single(
thread,(non(
blocking)(
delegate(long(
running(jobs(
&(IO(
callback(
request(
Workers(

33. Bower

34. AVATAR.JS
https://avatar-js.java.net/
Avatar.js is a project to bring the node programming model,APIs and
module ecosystem to the Java platform,

35. DEMO: avatar.js
Running a node web-app with avatar.js
Running a grunt build with avatar.js

36. PROJECT AVATAR
https://avatar.java.net/
A JavaScript service layer on top of JavaEE and a client JS framework
based on Java EL.

39. STATE OF PROJECT AVATAR
• Announced by Oracle on
JavaOne 2013
• Only available for Glassfish
• Nothing happened after March
2014
• Does not run on latest releases of
Glassfish/Java (at least on my machine)

40. AVATAR 2.0
• Oracle announced Avatar 2.0 on JavaOne 2014
• No Java EE application server needed
• Runs in its own JVM, startable from commandline
• No Client-Side Framework
• Parallel event loops in several threads
• Communication over message bus or shared state
• A JavaScript Model Store API for persistence (based on EclipseLink)
• Generally: Less Java EE more Node.js

41. STATE OF PROJECT AVATAR 2.0
• Announced by Oracle
beginning October
• Not available yet
• No code on avatar.java.net
• No release
• Very similar to vert.x (vertx.io/)

42. PROJECT AVATAR
unfortunately no demo...

43. Thank you for your attention.
Discussions?