MVC 1.0 - Now Even Better!

MVC 1.0, as specified by JSR 371, may not be targeted for the upcoming Java EE 8 release, but the specification is still going on as a standalone specification. It is already possible to use the technology in a Java EE 7 environment and as Java EE 8 and 9 evolves, MVC 1.0 will be kept aligned to take advantage of the features provided by the platform.

This session will go through the fundamentals of this specification and explain the core concepts. We will show lots of code samples showing how to use the framework to build MVC 1.0 applications. There will even be a demo of tooling support available and tips’n’tricks on how to extend the framework.

After this session you will have everything you need to get started using the technology to quickly build secure, flexible, localized MVC Web applications.

Transcript

1. @ivar_grimstad Devnexus 2017 - #JSR371 MVC 1.0 - by Example Ivar Grimstad Principal Consultant, Cybercom Sweden
2. @ivar_grimstad Devnexus 2017 - #JSR371 @ivar_grimstad https://github.com/ivargrimstad https://www.linkedin.com/in/ivargrimstad http://lanyrd.com/profile/ivargrimstad/
3. @ivar_grimstad Devnexus 2017 - #JSR371 JSR 371 Status MVC 1.0 Demo and Samples
4. @ivar_grimstad Devnexus 2017 - #JSR371 JSR 371 Status
5. @ivar_grimstad Devnexus 2017 - #JSR371
6. @ivar_grimstad Devnexus 2017 - #JSR371
7. @ivar_grimstad Devnexus 2017 - #JSR371
8. @ivar_grimstad Devnexus 2017 - #JSR371
9. @ivar_grimstad Devnexus 2017 - #JSR371 @Controller to the Community !
10. @ivar_grimstad Devnexus 2017 - #JSR371 January 2017 Transfer
 Ballot August 2014 First Proposal September 2014 Approved by JCP Executive Committee September 2014 Expert Group starts discussions March 2015 EDR 1 October 2016 October 2015 EDR 2 JavaOne Past Activities
11. @ivar_grimstad Devnexus 2017 - #JSR371 Current Activities Transfer approved by the Executive Committee
 Thanks! Finalize Transfer
 Oracle Legal is working on the final details New Infrastructure Setup
 Started Licensing
 Investigating
12. @ivar_grimstad Devnexus 2017 - #JSR371 Future Activities Formally move infrastructure from java.net 
 Bring in Christian Kaltepoth as co spec-lead
 Revise the Schedule
 Adopt-a-JSR

13. @ivar_grimstad Devnexus 2017 - #JSR371 Infrastructure Move
14. @ivar_grimstad Devnexus 2017 - #JSR371 Infrastructure Setup Changes Code
 java.net -> GitHub (https://github.com/mvc-spec) Issue Tracker
 java.net -> GitHub (https://github.com/mvc-spec/mvc-spec/issues) Mailing Lists
 java.net -> Google Groups (jsr371-users@googlegroups.com) Web Site
 java.net -> GitHub Pages (http://www.mvc-spec.org/)
15. @ivar_grimstad Devnexus 2017 - #JSR371 Adopt-a-JSR
16. @ivar_grimstad Devnexus 2017 - #JSR371 Write Code! Blog Tweet Give us Feedback Create a Logotype
17. @ivar_grimstad Devnexus 2017 - #JSR371 Upcoming MVC 1.0 Talks DEVNEXUS (http://devnexus.com/)
 Atlanta, USA - February 22-24 jDays (http://www.jdays.se/)
 Gothenburg, Sweden - Mars 7-8 JavaLand (https://www.javaland.eu/)
 Brühl, Germany - Mars 28-30 Developer Week (http://www.developer-week.de/)
 Nürnberg, Germany - June 26-29
18. @ivar_grimstad Devnexus 2017 - #JSR371 MVC 1.0
19. @ivar_grimstad Devnexus 2017 - #JSR371 Action-based MVC
20. @ivar_grimstad Devnexus 2017 - #JSR371 Controller Model View Request Update Update
21. @ivar_grimstad Devnexus 2017 - #JSR371 Controller Model View Request Update Update
22. @ivar_grimstad Devnexus 2017 - #JSR371 Controller Model View Request Update Update
23. @ivar_grimstad Devnexus 2017 - #JSR371 Comparable Frameworks Spring MVC around since 2005 “Real World” since 2008 (Spring 2.5 onward) today’s leader in Action-Land Struts 2 around since 2004 (WebWork 2) “Real World” since 2007 (Struts 2.0.9 onward) still widely adopted UPDATE !!
24. @ivar_grimstad Devnexus 2017 - #JSR371 Existing Java EE Technologies
25. @ivar_grimstad Devnexus 2017 - #JSR371 Key Decisions
26. @ivar_grimstad Devnexus 2017 - #JSR371 Key Decisions
27. @ivar_grimstad Devnexus 2017 - #JSR371 Build MVC 1.0 on top of JAX-RS
28. @ivar_grimstad Devnexus 2017 - #JSR371 Controllers
29. @ivar_grimstad Devnexus 2017 - #JSR371 Controller public class HelloController { }
30. @ivar_grimstad Devnexus 2017 - #JSR371 Controller @Path(“hello”) public class HelloController { }
31. @ivar_grimstad Devnexus 2017 - #JSR371 Controller @Controller @Path(“hello”) public class HelloController { }
32. @ivar_grimstad Devnexus 2017 - #JSR371 Views
33. @ivar_grimstad Devnexus 2017 - #JSR371 View @Controller @Path(“hello”) public class HelloController { }
34. @ivar_grimstad Devnexus 2017 - #JSR371 View @Controller @Path(“hello”) public class HelloController { @GET public String hello() { return “hello.jsp”; } }
35. @ivar_grimstad Devnexus 2017 - #JSR371 View @Controller @Path(“hello”) public class HelloController { @GET public Viewable hello() { return new Viewable(“hello.jsp”); } }
36. @ivar_grimstad Devnexus 2017 - #JSR371 View @Controller @Path(“hello”) public class HelloController { @GET public Response hello() { return Response.status(OK).entity(“hello.jsp”).build(); } }
37. @ivar_grimstad Devnexus 2017 - #JSR371 View @Controller @Path(“hello”) public class HelloController { @View(“hello.jsp”) @GET public void hello() { } }
38. @ivar_grimstad Devnexus 2017 - #JSR371 View @View(“hello.jsp”) @Controller @Path(“hello”) public class HelloController { @GET public void hello() { } }
39. @ivar_grimstad Devnexus 2017 - #JSR371 Models
40. @ivar_grimstad Devnexus 2017 - #JSR371 Model @Named(“greeting”) @RequestScoped public class Greeting { private String message; public void setMessage(String message) { this.message = message; } public void getMessage() { return message; } }
41. @ivar_grimstad Devnexus 2017 - #JSR371 Model @View(“hello.jsp”) @Controller @Path(“hello”) public class HelloController { @GET public void hello() { } }
42. @ivar_grimstad Devnexus 2017 - #JSR371 Model @View(“hello.jsp”) @Controller @Path(“hello”) public class HelloController { @Inject private Greeting greeting; @GET public void hello() { greeting.setMessage(“Hello Atlanta!”); } }
43. @ivar_grimstad Devnexus 2017 - #JSR371 Model <%@page contentType=“text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <title>MVC 1.0 Hello Demo</title> </head> <body> <h1>Hello ${greeting.message}</h1> </body> </html>
44. @ivar_grimstad Devnexus 2017 - #JSR371 Model @View(“hello.jsp”) @Controller @Path(“hello”) public class HelloController { @GET public void hello() { } }
45. @ivar_grimstad Devnexus 2017 - #JSR371 Model @View(“hello.jsp”) @Controller @Path(“hello”) public class HelloController { @Inject private Models model; @GET public void hello() { model.put(“message”, “Hello Atlanta!”); } }
46. @ivar_grimstad Devnexus 2017 - #JSR371 Model <%@page contentType=“text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <title>MVC 1.0 Hello Demo</title> </head> <body> <h1>Hello ${message}</h1> </body> </html>
47. @ivar_grimstad Devnexus 2017 - #JSR371 Validation
48. @ivar_grimstad Devnexus 2017 - #JSR371 @Controller @Path("form") public class FormController { @POST public Response formPost(@Valid @BeanParam FormDataBean f) { return Response.status(OK).entity(“data.jsp”).build(); } } Validation ConstraintValidationException @Min, @NotNull etc.
49. @ivar_grimstad Devnexus 2017 - #JSR371 Validation public class FormViolationMapper implements ExceptionMapper<ConstraintViolationException> { public Response toResponse(ConstraintViolationException e) { Set<ConstraintViolation<?>> s= e.getConstraintViolations(); // process violations ... return Response.status(BAD_REQUEST) .entity(“error.jsp”).build(); } }
50. @ivar_grimstad Devnexus 2017 - #JSR371 @Controller @Path("form") public class FormController { @Inject private BindingResult br; @POST public Response formPost(@Valid @BeanParam FormDataBean f) { if (br.isFailed()) { return Response.status(BAD_REQUEST) .entity(“error.jsp”).build(); } return Response.status(OK).entity(“data.jsp”).build(); } } Validation Allows for MVC Error Handling
51. @ivar_grimstad Devnexus 2017 - #JSR371 BindingResult
52. @ivar_grimstad Devnexus 2017 - #JSR371 View Engines
53. @ivar_grimstad Devnexus 2017 - #JSR371 Bring Your Own View Engine
54. @ivar_grimstad Devnexus 2017 - #JSR371 ViewEngine public interface ViewEngine { boolean supports(String view); void processView(ViewEngineContext context) throws ViewEngineException; }
55. @ivar_grimstad Devnexus 2017 - #JSR371 View Engine Conflicts @Priority(OUTRAGEOSLY_HIGH)
 @ApplicationScoped
 public class FreemarkerViewEngine extends ViewEngineBase { … }
56. @ivar_grimstad Devnexus 2017 - #JSR371 Events
57. @ivar_grimstad Devnexus 2017 - #JSR371 Controller Model View Request BeforeControllerEvent AfterControllerEvent BeforeProcessViewEvent AfterProcessViewEvent ControllerRedirectEvent
58. @ivar_grimstad Devnexus 2017 - #JSR371 Events Example @ApplicationScoped public class EventObserver { void onBeforeController(@Observes BeforeControllerEvent e) { println("URI: " + e.getUriInfo().getRequestURI()); } void onAfterController(@Observes AfterControllerEvent e) { println("Controller: " + e.getResourceInfo().getResourceMethod()); } }
59. @ivar_grimstad Devnexus 2017 - #JSR371 Security
60. @ivar_grimstad Devnexus 2017 - #JSR371 Cross Site Request Forgery @Controller @Path(“csrf”) public class HelloController { @CsrfValid @POST public Response post(@FormParam(“greeting") String greet { } }
61. @ivar_grimstad Devnexus 2017 - #JSR371 Cross Site Request Forgery <%@page contentType=“text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <title>MVC 1.0 Hello Demo</title> </head> <body> <form action="csrf" method="post" accept-charset="utf-8"> <input type="submit" value="Click here"/> <input type="hidden" name="${mvc.csrf.name}" value="${mvc.csrf.token}"/> </form> </body> </html>
62. @ivar_grimstad Devnexus 2017 - #JSR371 Scopes
63. @ivar_grimstad Devnexus 2017 - #JSR371 Model ReservationCtl Update confirmation reservation OK Browser POST
64. @ivar_grimstad Devnexus 2017 - #JSR371 Model ReservationCtl Access Update ConfirmationCtl GET confirmation reservation OK Redirect Browser POST
65. @ivar_grimstad Devnexus 2017 - #JSR371 @RedirectScoped @Named(“greeting”) @RedirectScoped public class Greeting { private String message; public void setMessage(String message) { this.message = message; } public void getMessage() { return message; } }
66. @ivar_grimstad Devnexus 2017 - #JSR371 @Controller public class HelloController { @Inject private Greeting greeting; @POST @Path(“from”) public String hello() { greeting.setMessage(“Hello Atlanta!”); return “redirect:/to“; } } @RedirectScoped @RedirectScoped @RequestScoped
67. @ivar_grimstad Devnexus 2017 - #JSR371 @Controller public class HelloController { @Inject private Greeting greeting; @POST @Path(“to”) public String hello() { return “here.jsp“; } } @RedirectScoped Same Bean
68. @ivar_grimstad Devnexus 2017 - #JSR371 Internationalization
69. @ivar_grimstad Devnexus 2017 - #JSR371 Controller @Controller @Path(“hello”) public class HelloController { @Inject private MvcContext mvc; @GET public String get() { Locale locale = mvc.getLocale(); } }
70. @ivar_grimstad Devnexus 2017 - #JSR371 Tool Support
71. @ivar_grimstad Devnexus 2017 - #JSR371 JPA Modeler jpamodeler.github.io Gaurav Gupta @jGauravGupta
72. @ivar_grimstad Devnexus 2017 - #JSR371 Tired of slides?
73. @ivar_grimstad Devnexus 2017 - #JSR371 Show me the CODE !
74. @ivar_grimstad Devnexus 2017 - #JSR371 Summary
75. @ivar_grimstad Devnexus 2017 - #JSR371 Action-based MVC
76. @ivar_grimstad Devnexus 2017 - #JSR371 Existing Java EE Technologies
77. @ivar_grimstad Devnexus 2017 - #JSR371 Build MVC 1.0 on top of JAX-RS
78. @ivar_grimstad Devnexus 2017 - #JSR371 Project Page https://www.mvc-spec.org GitHub https://github.com/mvc-spec Reference Implementation https://ozark.java.net
79. @ivar_grimstad Devnexus 2017 - #JSR371 Samples https://github.com/ivargrimstad/mvc-samples Blog http://www.agilejava.eu/
80. @ivar_grimstad Devnexus 2017 - #JSR371 cybercom.com