~$> whoami. Ioan Marius Curelariu SDE at Website Analytics Amazon Development Center Romania

Transcription

1 MVC on the WEB

2 ~$> whoami Ioan Marius Curelariu SDE at Website Analytics Amazon Development Center Romania

3

4 The Server Side Story

5 The Server Side Story Elastic Beanstalk

6 The Spring Framework First described in 2002, in Expert One-on-One J2EE Design and Development book, by Rod Johnson. Spring Container Spring Container Spring Container

7 Spring Modules AOP Object Relational Mapping Data Access Objects Web Context MVC Core

8 Model View Controller Sees View Updates User Model Uses Controller Manipulates

9 Spring MVC Architecture 1. Request Dispatcher Servlet Handler Mapping Model and View View Resolver Controller Application Logic Application Data View

10 TodoMVC Data Model Todo Todos

11 TodoSpringMVC Data Model Todo Todos Users User

12 TodoSpringMVC Data Model TodosManager Todos UsersManager User

13 Spring MVC Architecture 1. Request Dispatcher Servlet Handler Mapping Model and View View Resolver Controller Application Logic Application Data View

14 DispatcherServlet In /WEB-INF/web.xml <servlet> <servlet-name>appservlet</servlet-name> <servlet-class> org.springframework.web.servlet.dispatcherservlet </servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name> appservlet </servlet-name> <url-pattern>/*</url-pattern> </servlet-mapping>

15 ContextLoaderListener In /WEB-INF/web.xml <context-param> <param-name> contextconfiglocation </param-name> <param-value> /WEB-INF/spring/root-context.xml </param-value> </context-param> <listener> <listener-class> org.springframework.web.context.contextloaderlistener </listener-class> </listener>

16 Essential Configuration Declare the controllers and other components (appservlet-context.xml) <bean class="org.springframework.beans.factory.config.propertyplaceholder Configurer"> <property name="locations"> <value>classpath:todospringmvc.properties</value> </property> </bean> <context:component-scan base-package= com.amazon.todo.web />

17 Essential Configuration Resolve JSP Views <bean name= viewresolver class= org.springframework.web.servlet.view.internalresourceview Resolver > <property name= prefix value= /WEB-INF/views /> <property name= suffix value=.jsp /> </bean>

18 Essential Configuration Handle annotation-driven request mappings <mvc:annotation-driven/>

19 Spring MVC Architecture 1. Request Dispatcher Servlet Handler Mapping Model and View View Resolver Controller Application Logic Application Data View

20 SpringMVC Controller Configured using Simple JavaBeans Multiple handler mappings

21 @Controller public class HomeController = "username") public String getusername(principal user) { return user.getname(); = "/", method = RequestMethod.GET) public String home(locale locale, Model model) { DateFormat dateformat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale); String formatteddate = dateformat.format(new Date()); model.addattribute("servertime", formatteddate ); return "home"; } }

22 /register ) public class RegistrationController = RequestMethod.POST) public String registeruser(todouser todouser) { } return redirect:/ = RequestMethod.POST) public String register(todouser todouser) { } return register = /validateusername") String suggestusername(@requestparam String username) { } } return username;

23 = "/todos", produces = "application/json") public class TodosController value = "/{todoitemid}", method = RequestMethod.PUT, consumes = "application/json" public TodoItem altertodo(@pathvariable String TodoItem todoitem) { } }

24 Spring MVC Parameters & Return types Parameters can be HttpServletRequest / HttpServletResponse / HttpSession WebRequest InputStream / Return types can be ModelAndView / Model / Map View Object String (logical view name) Void

25 SpringMVC Views Integrates with many existing technologies Out of the box support for JSP & JSTL

26 JSON Spring MVC Views

27 Negotiating Content Request ContentNegociatingViewResolver

28 Other Spring MVC Features Exception Handling Localization Support Theme Handling Multipart (file upload) support Asynchronous Request Processing Testability

29 What we have done

30 Hosting...

31 First Beanstalk Application

32 Basic Application Informations

33 Application Environment Details

34 Application Configuration Details

35 Amazon RDS Instance Configuration

36 Configuration Summary

37 Application Console

38 Deploying a New Version

39 Thank you!...