Sprint Portlet MVC Seminar
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This seminar provides an introduction to Portlet development using the Spring MVC framework. Topics include: quick introductions to Spring and JSR 168 Portlets, setting up a Portlet development environment, an overview of the Spring MVC API, and then a series of sample applications that cover specific topics like Handler Mappings, Controllers, Interceptors, Form Controllers, File Uploads and the new Annotation-based Mappings introduced in Spring 2.5. Sample code is available at: http://www.ja-sig.org/wiki/x/CACDAQ
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Sprint Portlet MVC Seminar
- 6. Diagram from Java ™ Portlet Specification, Version 2.0
- 10. Diagram from Java ™ Portlet Specification, Version 2.0
- 16. Diagram from Spring Framework Reference Documentation
- 18. Diagram from Spring Framework Reference Documentation
- 24. Dispatcher (Servlet/Portlet) Request Handler Mapping View Resolver Response Controller View ModelAndView Map (Model) viewName
- 35. portlet.xml <portlet> <portlet-name>example</portlet-name> <portlet-class> o rg.springframework.web.portlet.DispatcherPortlet </portlet-class> <init-param> <name> contextConfigLocation </name> <value> /WEB-INF/context/example-portlet.xml </value> </init-param> <supports> <mime-type>text/html</mime-type> <portlet-mode>view</portlet-mode> <portlet-mode>edit</portlet-mode> <portlet-mode>help</portlet-mode> </supports> <portlet-info> <title>Example Portlet</title> </portlet-info> </portlet>
- 50. Annotation-Based HandlerMapping <context:annotation-config/> <bean class="org.springframework.web.portlet.mvc. annotation.DefaultAnnotationHandlerMapping"/> <bean class=" org.sample.MyView Controller"/> <bean class="org.sample.MyEditController"/> <bean class="org.sample.MyHelpController"/>
- 52. PortletModeHandlerMapping <bean id="portletModeHandlerMapping" class="org.springframework.web.portlet.handler. PortletModeHandlerMapping"> <property name="portletModeMap"> <map> <entry key="view" value-ref="viewController"/> <entry key="edit" value-ref="editController"/> <entry key="help" value-ref="helpController"/> </map> </property> </bean> <bean id="viewController" class="ViewController"/> ...
- 54. PortletModeParameterHandlerMapping <bean id="handlerMapping" class="…PortletModeParameterHandlerMapping"> <property name="portletModeParameterMap"> <map> <entry key="view"> <map> <entry key="add" value-ref="addHandler"/> <entry key="remove" value-ref="removeHandler"/> </map> </entry> <entry key="edit"> <map> <entry key="prefs” value-ref="prefsHandler"/> </map> </entry> </map> </property> </bean>
- 60. Annotation-Based Controller Beans <context:annotation-config/> <bean class="org.springframework.web.portlet.mvc. annotation.DefaultAnnotationHandlerMapping"/> <bean class="org.sample.MyViewController"/> <bean class="org.sample.MyEditController"/> <bean class="org.sample.MyHelpController"/>
- 62. Annotation-Based Controller Examples @Controller @RequestMapping("VIEW") @SessionAttributes("item") public class MyViewController { @RequestMapping public String listItems(Model model) { model.addAttribute("items", this.itemService.getAllItems()); return "itemList"; } @RequestMapping(params="action=view") public String viewPet( @RequestParam("item") int itemId, Model model) { model.addAttribute("item", this.itemService.getItem(itemId)); return "itemDetails"; } ...
- 63. Annotation-Based Controller Examples ... @ModelAttribute("dateFormat") protected String dateFormat(PortletPreferences prefs) { return preferences.getValue("dateFormat", itemService.DEFAULT_DATE_FORMAT); } @InitBinder public void initBinder(PortletRequestDataBinder binder, PortletPreferences preferences) { String format = preferences.getValue("dateFormat", ItemService.DEFAULT_DATE_FORMAT); SimpleDateFormat dateFormat = new SimpleDateFormat(formatString); binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true)); } ...
- 67. The Controller Interface public interface Controller { ModelAndView handleRenderRequest ( RenderRequest request, RenderResponse response) throws Exception; void handleActionRequest ( ActionRequest request, ActionResponse response) throws Exception; }
- 78. HandlerInterceptor Interface public interface HandlerInterceptor { boolean preHandleAction ( ActionRequest request, ActionResponse response, Object handler) throws Exception; void afterActionCompletion ( ActionRequest request, ActionResponse response, Object handler, Exception ex) throws Exception; boolean preHandleRender ( RenderRequest request, RenderResponse response, Object handler) throws Exception; void postHandleRender ( RenderRequest request, RenderResponse response, Object handler, ModelAndView modelAndView) throws Exception; void afterRenderCompletion ( RenderRequest request, RenderResponse response, Object handler, Exception ex) throws Exception; }
- 80. Configuring Interceptors <context:annotation-config/> <bean id="parameterMappingInterceptor" class="org.springframework.web.portlet.handler. ParameterMappingInterceptor" /> <bean class="org.springframework.web.portlet.mvc. annotation.DefaultAnnotationHandlerMapping"> <property name="interceptors"> <bean class="org.springframework.web.portlet.handler. ParameterMappingInterceptor"/> </property> </bean>
- 81. Configuring Interceptors <bean id="parameterMappingInterceptor" class="org.springframework.web.portlet.handler. ParameterMappingInterceptor" /> <bean id="portletModeParameterHandlerMapping" class="org.springframework.web.portlet.handler. PortletModeParameterHandlerMapping"> <property name="interceptors"> <list> <ref bean="parameterMappingInterceptor"/> </list> </property> <property name="portletModeParameterMap"> ... </property> </bean>
- 92. Portlet 2.0 Examples @ActionMapping(”delete”) public void deleteItem(...) { ... } @EventMapping(”reload”) public void reloadData(...) { ... } @RenderMapping("maximized", params="action=search") public String displaySearch(...) { ... } @ResourceMapping(”picklist”) public ModelAndView pickList (...) {...}
- 100. Questions & Answers John A. Lewis Chief Software Architect Unicon, Inc. [email_address] www.unicon.net