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

1. USE WICKET TESTER

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 public void labelContainsHelloWorld() { WicketTester tester = new WicketTester(); }

HELLOWORLD TEST @Test public void labelContainsHelloWorld() { WicketTester tester = new WicketTester(); tester.startPage(HelloWorld.class); }

HELLOWORLD TEST @Test public void labelContainsHelloWorld() { WicketTester tester = new WicketTester(); tester.startPage(HelloWorld.class); tester.assertLabel(quot;messagequot;, quot;Hello, World!quot;); }

LINK TEST @Test public void countingLinkClickTest() { }

LINK TEST @Test public void countingLinkClickTest() { WicketTester tester = new WicketTester(); }

LINK TEST @Test public void countingLinkClickTest() { WicketTester tester = new WicketTester(); tester.startPage(LinkCounter.class); }

LINK TEST @Test public void countingLinkClickTest() { WicketTester tester = new WicketTester(); tester.startPage(LinkCounter.class); tester.assertModelValue(quot;labelquot;, 0); }

LINK TEST @Test public void countingLinkClickTest() { WicketTester tester = new WicketTester(); tester.startPage(LinkCounter.class); tester.assertModelValue(quot;labelquot;, 0); tester.clickLink(quot;linkquot;); }

LINK TEST @Test public void countingLinkClickTest() { WicketTester tester = new WicketTester(); tester.startPage(LinkCounter.class); tester.assertModelValue(quot;labelquot;, 0); tester.clickLink(quot;linkquot;); tester.assertModelValue(quot;labelquot;, 1); }

NAVIGATION TEST @Test public void navigateToSecondPage() { }

NAVIGATION TEST @Test public void navigateToSecondPage() { WicketTester tester = new WicketTester(); tester.startPage(new FirstPage()); }

NAVIGATION TEST @Test public void navigateToSecondPage() { WicketTester tester = new WicketTester(); tester.startPage(new FirstPage()); tester.clickLink(quot;linkquot;); }

NAVIGATION TEST @Test public void navigateToSecondPage() { WicketTester tester = new WicketTester(); tester.startPage(new FirstPage()); tester.clickLink(quot;linkquot;); tester.assertRenderedPage(SecondPage.class); }

2. PAGE CHECK

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...

3. ENTITY CHECKER

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); } } } }

WICKET SERIALIZER CHECK 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); }

WICKET SERIALIZER CHECK 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 ... }

WICKET SERIALIZER CHECK 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

4. MARKUP VALIDATOR

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

5. REQUESTLOGGER

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

REQUEST LOST PARSER

6. RABID MONITORING

NABAZTAG • Availability of production applications • Performance of production applications • Hudson builds • Issue tracker

THANK YOU!

Keep your Wicket application in production

by Martijn Dashorst on Mar 25, 2009

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