1. Java Web Application Framework
Apache Wicket
Java Web Application Framework

2. What is Wicket? Web Application Framework
Component-Component-based Framework
Wicket 1.4 is Java 1.5+ compliant

3. Where does Wicket fit?

4. Request / Response
JSP Request / Response

5. Model 2 (MVC)
Struts, Spring MVC, Stripes

6. Advantages of R/R Rendering views is generally quite fast
Development can leverage existing tag libraries
Recruiting developers may be easier
Modern implementations have good support for DI and IoC frameworks

7. Disadvantages of R/R Controller implementations must explicitly
consider multiple concurrent users and threads
Controllers generally work literally in terms ofHTTP requests and responses
Controllers often explicitly manage state
Not strictly Object Oriented
The programming model is skewed

8. The Impedance Mismatch
The Programming Model
Programming in Java - do we regularly focus on how the JVM manages object instances and variables?
Generally, website development requires an
understanding of the HTTP protocol.
IE: manually managing state within and across requests forces front end handlers to be protocol specific.

9. What if ... ? What if we considered a page ... a Page?
What if we considered a button ... a Button?
And upon clicking a button, handled an onClick event?
What if web-development resembled Swing or event-driven development?
What kind of framework could possibly enable this?!

10. Enter ... Wicket Component-based framework
Instead of creating a controller, servlet or action
class ... create a Page
Place components on said Page and define how
each component reacts to user input
•Build the Page in Java to manage HTML page
elements ... not the other way around

11. Web App Config
web.xml

12. Wicket Config
WicketApplication.java

13. General Structure Layout the element hierarchy Style the elements
Markup (HTML’s Role)
Code (Java’s Role)
Properties Files

14. Hello World
Markup
Java

15. Result

16. Forms (HTML)
Markup

17. Forms (Java)
Java

18. Component Family

19. Advantages POJO-centric Avoid overuse of XML configuration files
Fully solve back button problem
Easy to create bookmarkable pages
Reusability
Easy to integrate with Java security
Compatible with any ordinary HTML editor

20. Wicket Resources Wicket Links http://wicket.apache.org/
Wicket Books
Wicket in Action (Manning)
Pro Wicket (Apress)