Integrating Wicket with Java EE 6
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Apache Wicket is constantly growing in popularity throughout all kinds of projects. However Wicket doesn't come out of the box with a built-in Java EE support. Integration to CDI is missing and the same is valid for Bean Validation support for example. This session demonstrates how you can user CDI, Conversations and Bean Validation together with Apache Wicket. The first part of the talk will consist of a small slide-driven theoretical part whereas the second part will consist of a coding session that demonstrates hands-on how to hook everything together.
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Integrating Wicket with Java EE 6
- 1. Wicket + JEE 6 Michael Plöd Senacor Technologies AG
- 2. Agenda • Brief Wicket Intro • Standard Wicket - Spring App • Integrating Wicket and EJB with CDI • Integrating Wicket and Bean Validation • Coding Example
- 3. Quickstart mvn archetype:create -DarchetypeGroupId=org.apache.wicket -DarchetypeArtifactId= wicket-archetype-quickstart -DarchetypeVersion=1.4.13 -DgroupId=com.senacor -DartifactId=wicket-example
- 4. WebApplication.java wicket HomePage.java - HomePage.html example web.xml
- 5. web.xml configures Application
- 6. <web-app ... > <display-name>wicket-example</display-name> <filter> <filter-name>wicket.wicket-example</filter-name> <filter-class>org.apache.wicket.protocol.http.WicketFilter</filter-class> <init-param> <param-name>applicationClassName</param-name> <param-value>com.senacor.WicketApplication</param-value> </init-param> </filter> <filter-mapping> <filter-name>wicket.wicket-example</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
- 7. Application is responsible for bootstrapping
- 8. package com.senacor; import org.apache.wicket.protocol.http.WebApplication; public class WicketApplication extends WebApplication { public WicketApplication() {} public Class<HomePage> getHomePage() { return HomePage.class; } }
- 10. WebApplication.java wicket HomePage.java - HomePage.html example web.xml
- 11. WebApplication.java wicket HomePage.java - HomePage.html example web.xml
- 12. Page defines the Java part
- 13. HTML defines the markup part
- 14. public class HomePage extends WebPage { public HomePage(final PageParameters parameters) { add(new Label("message", "If you see this message wicket is properly configured and running")); } } <html xmlns:wicket= "http://wicket.apache.org/dtds.data/wicket-xhtml1.4-strict.dtd" > <head> <title>Wicket Quickstart Archetype Homepage</title> </head> <body> <strong>Wicket Quickstart Archetype Homepage</strong> <br/><br/> <span wicket:id="message">message will be here</span> </body> </html>
- 15. <span wicket:id="message">message will be here</span> add(new Label("message", "If you see this message wicket is properly configured and running"));
- 16. Spring JEE <span wicket:id="message">message will be here</span> add(new Label("message", "If you see this message wicket is properly configured and running"));
- 17. Typical Wicket Wicket - Spring @SpringBean Application <Service> Spring Bean @Autowired <Repository> Spring Bean
- 18. public class HomePage extends WebPage { @SpringBean private PersonService personService; private class PersonListModel extends LoadableDetachableModel<List<Person>> { @Override protected List<Person> load() { return personService.listPersons(); } } public HomePage(final PageParameters parameters) { ... final PropertyListView<Person> list = new PropertyListView<Person>("persons", new PersonListModel()) { ... } }; ...
- 19. JSF Typical Java EE 6 @ManagedBean + Application @EJB / Inject <Service> EJB 3.1 @Inject / @EJB <DAO> EJB 3.1 / JPA
- 20. JSF
- 21. Wicket Wicket + ? Java EE6 <Service> EJB 3.1 @Inject / @EJB <DAO> EJB 3.1 + JPA
- 22. Component wiring with CDI Weld / Seam Wicket Module
- 24. package com.senacor; import org.apache.wicket.protocol.http.WebApplication; public class WicketApplication extends WeldApplication { public WicketApplication() {} public Class<HomePage> getHomePage() { return HomePage.class; } }
- 25. public class HomePage extends WebPage { @Inject private PersonService personService; private class PersonListModel extends LoadableDetachableModel<List<Person>> { @Override protected List<Person> load() { return personService.listPersons(); } } public HomePage(final PageParameters parameters) { ... final PropertyListView<Person> list = new PropertyListView<Person>("persons", new PersonListModel()) { ... } }; ...
- 26. „Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the universe trying to build bigger and better idiots. So far, the universe is winning.“ -- Robert Cringely --
- 27. Model Validation with Wicket
- 28. Validate Validation Conversion mandatory of Back to input Validation screen of onSubmit Update EventHandler model
- 29. Validate Validation Conversion mandatory of Back to input Validation screen of onSubmit Update EventHandler model
- 30. form.add(new TextField("firstname").setRequired(true)); form.add(new TextField("email") .setRequired(true) .add(EmailAddressValidator.getInstance())); form.add(new TextField("age") .add(NumberValidator.minimum(18))); form.add(new TextField("username") .add(StringValidator.lengthBetween(6, 10))); form.add(new TextField("username") .add(new PatternValidator("[a-zA-Z0-9]*")) .add(StringValidator.lengthBetween(6, 10)));
- 31. No support for Model Bean Validation Validation in Wicket 1.4 with Wicket
- 32. JSR-303 Wicket Validator from Zenika http://code.google.com/p/wicket-jsr303-validators/ http://blog.zenika.com/index.php?post/ 2010/02/24/Wicket-JSR-303-Validators
- 33. public class Person { @NotNull private String firstname; @NotNull @EMail private String email; ... } form.setModel(new CompoundPropertyModel(new Person())); form.add(new TextField("firstname")); form.add(new TextField("email")); form.add(new TextField("age")); form.add(new TextField("password")); form.add(new TextField("username")); form.add(new JSR303FormValidator());
- 34. Live Coding example https://github.com/mploed/wicketjee6-example
- 35. Further Reading Wicket In Action Martijn Dashorst, Eelco Hillenius Manning Wicket Roland Förther, Olaf Siefart, Carl-Eric Menzel dpunkt Verlag
- 36. Thank You! Michael Plöd Senacor Technologies AG
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