Wicket Live on Stage
A Wicket case study

Agenda
• Why Wicket?
• What is Vocus?
• Wicket in Action

Topicus
• ASP/SAAS provider
• healthcare
• education
• finance
• insurance

Topicus Gifkikker

ket
ic
hy W
W

Web 2002
• Struts
• JSPs
• OJB

Web 2003
• Maverick
• Velocity
• Baritus
• Hibernate

Parnassys

Parnassys: searching

Parnassys: attendance

Problems with MVC
• 1 change requires N files to be modified
(for large values of N)
• high learning curve
• back button
• procedural programming
• little to no reuse
• complex UI neigh impossible

Web 2005
• Wicket
• Hibernate 3!
• Java 5
• Start of Vocus

Vocus
• Student information system
• Secondary/High school
• SaaS solution
• Fully web based

Functionality
• Registration
• Funding
• Results/Exams
• Student guidance
• Attendance

Wicket usage
• Started with 1.1
• Moved along with 1.2
• Backports from 1.3 into custom 1.2 branch
• Currently migrating to 1.3

DEMO

Student information at a glance
(data has been scrambled)

Entering grades from home
(data has been scrambled)

Wicket’s TreeTable in action
(data has been scrambled)

Chart 2
300000
#Requests
225000
150000
75000
0
2007-09-12 2007-09-18 2007-09-24 2007-09-30 2007-10-06 2007-10-12 2007-10-18 2007-10-24 2007-10-30 2007-11-05 2007-11-11 2007-11-17 2007-11-23 2007-11-29
>300 users

Keeping your server
alive
• request logger
• serialization check
• use a profiler
• pick the right GC
• run on JDK 6 (mustang)

function ClickZoekresultaten(url) {
if($('SRP_SearchResultsPanel').style.display=='none') {
new Ajax.Updater(
'SRP_SearchResultsPanel',
url,
{
asynchronous : true,
method : 'get',
onComplete : function() {
Effect.SlideDown('SRP_SearchResultsPanel',
{duration : 0.5});
Behaviour.apply();
}
}
);
} else {
Effect.SlideUp('SRP_SearchResultsPanel',
{duration : 0.5});
}
}

add(new AttributeModifier(\"onclick\", true, new Model()
{
@Override
public Object getObject(Component component)
{
return \"ClickZoekresultaten('\" + component.urlFor(ILinkListener.INTERFACE)
+ \"'); return false;\";
}
}));
public void onClick()
{
Panel panel = (Panel) getParent().get(\"resultaten\");
showResultaten();
ComponentRequestTarget target = new ComponentRequestTarget(panel);
WebRequestCycle cycle = (WebRequestCycle) RequestCycle.get();
// zet de contenttype op xml om UTF-8 goed voor elkaar te krijgen
WebResponse response = (WebResponse) cycle.getResponse();
response.setContentType(\"text/xml\");
response.setLastModifiedTime(Time.START_OF_UNIX_TIME);
response.setHeader(\"Cache-control\", \"no-cache, must-revalidate\");
cycle.setRequestTarget(target);
}

Questions?

BEER!