Keep your Wicket application in production

Get your application
in production...

...and keep your
weekends free
Martijn Dashorst
Topicus

6 WAYS TO KEEP YOUR JOB
OUT OF YOUR WEEKEND

WICKETTESTER

• Test components directly, or their markup

• Runs tests without starting server

• Ajax testing (server side)

• Runs in IDE, ant, maven builds

• Achieves high code coverage

HELLOWORLD TEST
@Test
public void labelContainsHelloWorld() {
}

HELLOWORLD TEST
@Test
WicketTester tester = new WicketTester();
}

HELLOWORLD TEST
@Test
tester.startPage(HelloWorld.class);
}

HELLOWORLD TEST
@Test
tester.startPage(HelloWorld.class);
tester.assertLabel(quot;messagequot;, quot;Hello, World!quot;);
}

LINK TEST
@Test
public void countingLinkClickTest() {
}

LINK TEST
@Test
}

LINK TEST
@Test
tester.startPage(LinkCounter.class);
}

LINK TEST
@Test
tester.assertModelValue(quot;labelquot;, 0);
}

LINK TEST
@Test
tester.clickLink(quot;linkquot;);
}

LINK TEST
@Test
}

NAVIGATION TEST
@Test
public void navigateToSecondPage() {
}

NAVIGATION TEST
@Test
tester.startPage(new FirstPage());
}

NAVIGATION TEST
@Test
}

NAVIGATION TEST
@Test
tester.assertRenderedPage(SecondPage.class);
}

PAGES IN EDUARTE

• Pages must have @PageInfo annotation

• Policy ﬁle must contain existing pages

• All secure pages must be in the policy ﬁle

PAGE INFO ANNOTATION
@PageInfo(
title = quot;Intake stap 1 van 4quot;,
menu = {quot;Deelnemer > intakequot;}
)
public class IntakePersonalia extends IntakeWizardPage
{
...
}

Our build fails for any
of these problems...

Storing Hibernate entities in
your pages is bad...

...mkay

WICKET SERIALIZABLE
CHECKER

• Runs when page is serialized

• Tries to ﬁnd non-serializable objects attached to page

• Helpful stacktraces

EXAMPLE STACKTRACE

Unable to serialize class: nl.topicus.project.entities.personen.Persoon
Field hierarchy is:
2 [class=nl.topicus.project.SomePage, path=2]
nl.topicus.project.entities.personen.Persoon
nl.topicus.project.SomePage.persoon <----- Entity

WICKET SERIALIZER CHECK
public class TopicusRequestCycle extends WebRequestCycle {
public void onEndRequest() {
Page requestPage = getRequest().getPage();
testDetachedObjects(requestPage);

if (getRequestTarget() instanceof IPageRequestTarget) {
Page responsePage = getRequestTarget().getPage();
if (responsePage != requestPage) {
testDetachedObjects(responsePage);
}
}
}
}

if (page == null || page.isErrorPage()) {
return;
}

try {
checker = new EntityAndSerializableChecker(
new NotSerializableException());
checker.writeObject(page);
} catch (Exception e) {
log.error(quot;Couldn't serialize: quot; + page + quot;, error: quot; + ex);
}

private void check(Object obj) {
Class cls = obj.getClass();
nameStack.add(simpleName);
traceStack.add(new TraceSlot(obj, ﬁeldDescription));

if (!(obj instanceof Serializable) && (!Proxy.isProxyClass(cls)))
{
throw new WicketNotSerializableException(/* ... */);
}
... complicated stuff ...
}

if (!(obj instanceof Serializable) && (!Proxy.isProxyClass(cls))) {
throw new WicketNotSerializableException(/* .. */)
.toString(), exception);
}
if (obj instanceof IdObject) {
Serializable id = ((IdObject) obj).getIdAsSerializable();
if (id != null && !(id instanceof Long && ((Long) id) <= 0)) {
throw new WicketContainsEntityException(/* ... */);
}
}

... complicated stuff ...

To ensure developers
have to ﬁx it immediately...

...an Ajax callback checks for these
errors and renders an ErrorPage

VALID MARKUP...

• Nobody cares about valid markup

• XHTML is dead

INVALID MARKUP...

do care
• Browsers

• Subtle differences between browser DOM handling

• Ajax becomes a pain

WICKET STUFF HTML
VALIDATOR

• http://github.com/dashorst/wicket-stuff-markup-validator

• Based on: http://tuckey.org/validation

ADD DEPENDENCY TO POM
<dependency>
<groupId>org.wicketstuff</groupId>
<artifactId>htmlvalidator</artifactId>
<version>1.0</version>
<scope>test</scope>
</dependency>

ADD FILTER TO WEBAPP
public class MyApplication extends WebApplication {
// ...

@Override
protected void init() {
// only enable the markup ﬁlter in DEVELOPMENT mode
if(DEVELOPMENT.equals(getConﬁgurationType())) {
getRequestCycleSettings()
.addResponseFilter(new HtmlValidationResponseFilter());
}
}
}

DEFINE PROPER DOCTYPE
<!DOCTYPE html PUBLIC quot;-//W3C//DTD XHTML 1.0 Transitional//EN
quot;http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtdquot;>
<html xmlns=quot;http://www.w3.org/1999/xhtmlquot;>
<head>
<title>Foo</title>
</head>
<body>
</body>
</html>

... AND ENDURE THE HORRORS
OF VALID MARKUP

REQUEST LOGGER

• HTTPD logs are (mostly) useless for Wicket applications

• POST /vocus/app?wicket:interface=:4:lijst::IBehaviorListener...

• GET /vocus/app?wicket:interface=:1084::

• RequestLogger provides decoded information:

• Page, Listener, RequestTarget, SessionID, etc.

14:00:19 time=101,
event=Interface[
target:DefaultMenuLink(menu:personalia:dropitem
page: nl.topicus.gui.student.ToonPersonaliaPage(4)
interface: ILinkListener:onLinkClicked],
response=PageRequest[
nl.topicus.gui.student.ToonLeerlingRelatiesPage(6)]
sessioninfo=[
sessionId=D574D35FF49C047E4F290FE
clientInfo=ClientProperties{
remoteAddress=192.0.2.50,
browserVersionMajor=7,
browserInternetExplorer=true},
organization=Demo School
username=administrator],
sessionstart=Fri Dec 14 13:59:14 CET 2008,
requests=14,
totaltime=3314

NABAZTAG

• Availability of production applications

• Performance of production applications

• Hudson builds

• Issue tracker

Keep your Wicket application in production

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