Building Web Apps with Spring 3.0 – Meeting notes

This presentation and notes are from the May 2009 Java User group meeting in Twin Cities. You can view the details and download the code from http://www.intertech.com/UserGroups/JUGPresentation.aspx?TopicID=135 It was an excellent presentation. Bob has discussed about new cool features in Spring 3 and how it simplifies the Spring MVC development. These presentation slides are created by him and all rights lies with him.

• DispatcherServlet is the central servlet handling requests
• See slide 7. The request handling takes place in the following order
  1. HTTP Request is first handled by Dispatcher Servlet
  2. DispatcherServlet refers HandlerMapping find the controller which will handle the request
  3. DispatcherServlet sends the request to the Controller. Controller returns view and/or model.
  4. DispatcherServlet refers to ViewResolver to determine the view page based on logical view name
  5. View is rendered
• Controller hierarchy is deprecated in Spring 3.Just annotation is enough. No need to implement life-cycle methods
• Flexible method arguments. Flexible return types.
• Annotations like
  @RequestParam
  @ModelAttribute
  @RequestMapping
  @SessionAttribute
  @InitBinder
  and WebBindingInitializer
• Convention verses configuration
• ControllerClassNameHandlerMapping
• Model and ModelMap
• Rest Support

  Stateless, cacheable, scalable, communication protocol
  HTTP Methods – GET, POST, PUT(Idempotent), DELETE(Idempotent), HEAD, OPTIONS

• Spring 3.0 has REST support

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Beginning Groovy and Grails

In the last session on April 13, 2009 on Jazz and Rational Team Concert at TCJUG , I have won the book Beginning Groovy and Grails: From Novice to Professional (Beginning from Novice to Professional) in the lucky draw.

This is happening second time in the row that I have attended JUG meeting with Groovy message. In my last meeting the topic of discussion itself was groovy and this time around, it is the book. The message is loud and clear. Looks like everyone has started taking Groovy seriously. People consider it as gen-next Java language. After all, Groovy is not something which poises itself to compete with Java language. In fact it builds itself over the Java language. You run groovy programs on JVM. While relieving developers of many of the pains which comes with java, groovy provides many powerful features, missing and long sought in Java.
Having said that, I am still a doubtful thomas, when it comes to new technology. To build a secure, scalable, robust application, I would not put my bets on Grails. At least for now.

By the way the presentation slides for Jazz are not there yet on TCJUG website. Check http://jazz.net/ for more details.
Jazz is also a wonderful framework address the concerns of the entire life-cycle of project development. From requirement analysis to design and development; from testing to maintenance; from project management to project change management; it is built on the vision to provide one -stop- shop for all the needs.
Rational Team Concert is the product built on Jazz framework. The speaker has demonstrated many cool features of RTC. It integrates IDE, testing environment, team collaboration, version and cofiguration management, quality management in the other words absolutely every tool we use daily during the software lifecycle. It integrates all these tools at one place. PM will have the clear and accurate picture what is going on with the status and updates of each and every developer, tester will now what fixes developers are working on etc etc. Worth checking out. As far as I remember, the speaker said that this product is relatively new but it has achieved record sales in its category in IBM.