Annotation-Based Spring Portlet MVC
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The document discusses annotation-based Spring Portlet MVC as presented by John A. Lewis at the Jasig 2010 conference. It outlines the structure and functionality of Spring MVC, highlighting the use of annotations for simplifying controller logic and integrating support for Portlet 2.0 features. It provides specific examples of how to implement controllers using annotations like @Controller and @RequestMapping, along with details about setting up the development environment.
Annotation-Based Spring Portlet MVC
- 1. Annotation-Based Spring Portlet MVC John A. Lewis Chief Software Architect Unicon, Inc. Jasig 2010 Conference 8 March 2010 © Copyright Unicon, Inc., 2010. Some rights reserved. This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/us/
- 2. Spring MVC Flexible and Lightweight
- 4. Implements Classic MVC Pattern Model Information to be presented
- 5. Contract between Controller and View View User interface definition
- 6. Used to render the Model for display Controller Handles the request and assembles the Model
- 7. Delegates to service layer for business logic
- 8. Dispatcher (Servlet/Portlet) Request Handler Mapping View Resolver Response Controller View ModelAndView Map (Model) viewName
- 9. Sample Portlet Application Things we need to do: Get development environment installed
- 10. Setup Pluto as a Server in Eclipse & start it
- 12. Create Maven task to build & deploy
- 13. Build & deploy the sample application
- 14. Verify that it works in Pluto http://localhost:8080/pluto/portal Explore the web.xml and portlet.xml files
- 15. Annotation-Based Controllers Where to put the logic
- 16. Annotation-Based Controllers New in Spring Framework 2.5!
- 17. Eliminates need for complex HandlerMapping configuration to deal with navigation via Portlet Modes and Request Parameters
- 18. Allows related logic to be combined into a single Controller class
- 19. Will replace the entire Controller hierarchy – most capability already supported
- 20. 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"/>
- 21. Spring MVC Controller Annotations @Controller – class stereotype for controller classes so they can be found and mapped
- 22. @SessionAttributes – list model attributes to be stored in the session (command object)
- 23. @RequestMapping – class/method mapping to requests (mode, parameters, etc.)
- 24. @RequestParam – bind method params to request params
- 25. @ModelAttribute – bind method params or return values to model attributes
- 26. @InitBinder – method to setup binder for putting form submission into command obj
- 27. 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"; } ...
- 28. 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)); } ...
- 29. Annotation-Based Controller Sample src/main/java/ sample/portlet/MyBooksController.java
- 31. Portlet 2.0 (JSR 286) Support The next generation portlet framework
- 32. Major Changes in Portlet 2.0 Portlet Events (New lifecycle phase!)
- 33. Resource Serving (New lifecycle phase!)
- 35. Portlet Filters
- 36. Caching Changes Lots of other minor changes...
- 37. Portlet 2.0 In Spring 3.0 Support for new features of Portlet 2.0 included as part of Spring 3.0
- 38. Spring 3.0 released 16 Dec 2009
- 39. Primary need is support for four phases: ActionRequest / ActionResponse
- 40. EventRequest / EventResponse (new!)
- 42. ResourceRequest / ResourceResponse (new!)
- 43. Annotations for Portlet 2.0 Support @ActionMapping Elements: name, params @EventMapping Elements: name, qname, params @RenderMapping Elements: windowState, params @ResourceMapping Elements: id, params
- 44. 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 (...) {...}
- 45. Questions & Answers John A. Lewis Chief Software Architect Unicon, Inc. [email_address] www.unicon.net