MVC 1.0 / JSR 371

2. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. The following is intended to outline our g eneral product direction. It is intended for i nformation purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle. Safe Harbor Statement 2

3. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Lorem ipsum dolor sit amet, MVC, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua, Action-‐Based MVC. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. JSR 371 duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Ozark excepteur sint occaecat cupidatat non proident. My Own Statement 3

6. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Java EE 7 ENTERPRISE EDITION • Batch • Concurrency • Simplified JMS • More annotated POJOs • Less boilerplate code • Cohesive integrated platform DEVELOPER PRODUCTIVITY • WebSockets • JSON • Servlet 3.1 NIO • REST MEETING   ENTERPRISE DEMANDS Java EE 7 6

8. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Java EE 8 Community Survey Should Java EE provide support for MVC alongside JSF? Is there any one de-‐facto standard technology in this space to which we should look for inspiration? 8

11. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. What is MVC? • Pattern used to implement a User Interface • Consists of 3 major components – Model – View – Controller • Each of the components has a distinct responsibility 11

12. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. The M(odel) • Interim state you want to keep when you are building an UI • Examples – Who is logged in – What are they trying to buy – What page are they on in a multi page flow 12

13. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. The V(iew) • What your user interacts with – In a web application that would be the web page or web pages • your JSP page • your CSS styles • your JavaScript – In a thick client scenario it would be the entire UI – In an embedded scenario it could be the touch screen, hardware buttons etc. 13

14. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. The C(ontroller) • Work horse of the pattern: – Executes the business logic • Run a credit card transaction – Updates the model • Mark the transaction as successful in the model object – Ask the view to render itself • Shows the transaction was successful 14

16. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Component-‐based MVC • A specific style of MVC made popular by component frameworks • Controller provided by the framework • Examples – JavaServer Faces – Wicket – Tapestry – Seam (discontinued) – Apache Click (retired) 16

17. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Action-‐based MVC • Controller(s) defined by the application • Examples – Struts 1 (end of life), Struts 2 – Spring MVC • No standard Java EE implementation – Good news we are creating one! – Targeted for inclusion in Java EE 8 17

18. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Action-‐based MVC – Manual request parameter processing – No view kept around – Request centric – Developer responsible for all HTML / JS – Limited support for re-‐usable behavior – No automatic input conversion – No automatic input validation Component-‐based MVC – Automatic request parameter processing – View kept around – Page centric – Components handle HTML / JS – Component implement re-‐usable behavior – Automatic input conversion – Automatic input validation Compare and contrast 18

20. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Model-‐View-‐Controller (MVC 1.0) Specification • “Action-‐based” MVC 1.0 JSR • Why? – UI landscape is not one size fits all – Java EE 8 Community Survey – Talking to our customers, etc. • EG formed – Oracle, RedHat, innoQ, IBM, Caelum, LifeRay, and 6 individuals members • You can contribute too! JSR 371 20

21. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Model-‐View-‐Controller (MVC 1.0) Specification • Ozark – https://ozark.java.net • Open Source – git://java.net/ozark~sources – https://github.com/spericas/ozark Reference Implementation 21

22. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. MVC 1.0 • Action-‐based MVC • Glues together key Java EE technologies – Model : CDI, Bean Validation, JPA – View : Facelets, JSP, more? – Controller : Invent new technology Vs. Leverage existing technologies 22 Principles

23. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Controller • Combine data models and views to produce web application pages @Path("hello") public class HelloController { @GET @Controller public String hello() { return "hello.jsp"; } } 23

24. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Controller • Class/method decorated with @Controller @Path(“hello") @Controller public class HelloController { @GET @View(“hello.jsp") public void hello() { } } 24

25. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Controller @Path(“hello") @Controller public class HelloController { @GET public Viewable hello() { return new Viewable("hello.jsp"); } } 25

26. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Controller … @GET @Controller public Response getById(@PathParam("id") String id) { if (id.length() == 0) { return Response.status(Response.Status.BAD_REQUEST) .entity(“error.jsp") .build(); } } 26

28. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Model @Named(“greeting”) @RequestScoped public class Greeting { private String message; public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } } 28

29. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Model @Path(“hello”) public class HelloController { @Inject private Models models; @GET @Controller public String hello() { models.set(“greeting”, new Greeting(“Hi JavaLand”)); return “hello.jsp”; } } 29

30. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. View • Define the structure of the output • Can refer to model(s) • Rendered by a View Engine – JSP – Facelets • Not accessible as static resources – /WEB-‐INF/views/ 30

31. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. View <%@ page contentType=“text/html;charset=UTF-8” language=“java” %> <html> <head> <title>Hello</title> </head> <body> <p>Hello ${user.name}</p> </body> </html> 31

32. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. View Engine • CDI based extension mechanism • javax.mvc.engine.ViewEngine interface boolean supports(String view); void processView(ViewEngineContext context) throws ViewEngineException; • Ozark – JSP & Facelets – FreeMarker, Velocity, Thymeleaf, Mustache & Handlebars 32

33. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Miscellaneous • Bootstrap – javax.ws.rs.core.Application • Validation • Exception Mapping Providers • @Produces • CDI Events • Tooling 33

34. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Demos? 34 Lorem ipsum dolor sit amet, Intial consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua, Ozark Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Velit duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. milestone build excepteur sint occaecat cupidatat non proident.

36. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Conclusion • Doing MVC now is not a bad idea, because we are: – Leveraging CDI, JAX-‐RS, Facelets, BV – More? Servlet 4.0’s ServerPush – Delivering an easy migration path if you are using JSPs • Offers more choices • New annotations – @Controller – @View 36

37. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Java EE 8 • Java EE 8 Platform (JSR 366) • CDI 2.0 (JSR 365) • JSON Binding 1.0 (JSR 367) • JMS 2.1 (JSR 368) • Java Servlet 4.0 (JSR 369) • JAX-‐RS 2.1 (JSR 370) • MVC 1.0 (JSR 371) • JSF 2.3 (JSR 372) • Java EE Management 2.0 (JSR 373) • JSON-‐P 1.1 (JSR 374) • Java EE Security 1.0 (JSR 375) So far….. 37

38. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Roadmap • Q3 2014 Expert Group formed • Q1 2015 Early Draft • Q3 2015 Public Review • Q1 2016 Proposed Final Draft • Q3 2016 Final Release 38

39. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Contribute! • Join the JCP • “Adopt-‐A-‐JSR” – http://glassfish.java.net/adoptajsr • Get involved – Join MVC users mailing list – Tweet, blog, socialize to raise awareness about MVC 1.0 – Test MVC SNAPSHOT and milestone builds (https://ozark.java.net) – Fill issues! 39

40. Copyright © 2015, Oracle and/or its affiliates. All rights reserved. Links • MVC specification – http://mvc-‐spec.java.net, users@mvc-‐spec.java.net • MVC implementation – http://ozark.java.net, users@ozark.java.net • Spec leads – Santiago (@spericas) – Manfred (@mnriem, http://mvc.zeef.com/manfred.riem ) • The Aquarium Blog – https://blogs.oracle.com/theaquarium/ 40

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