MVC 1.0 /JSR 371, presented at JavaLand 2015

1. MVC
1.0
JavaLand
March
2015
David
Delabassee
@delabassee
Oracle
Copyright
©
2014,
Oracle
and/or
its
affiliates.
All
rights
reserved.
1

2. Copyright
©
2015,
Oracle
and/or
its
affiliates.
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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

4. Copyright
©
2015,
Oracle
and/or
its
affiliates.
All
rights
reserved.
Agenda
Context
MVC
1.0
JSR
Conclusion
1
2
3
4

5. Copyright
©
2015,
Oracle
and/or
its
affiliates.
All
rights
reserved.
Agenda
Context
MVC
1.0
JSR
Conclusion
1
2
3
5

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

7. Copyright
©
2015,
Oracle
and/or
its
affiliates.
All
rights
reserved.
Java
EE
8
Cloud
Mobile
HTTP/2
SECURITY
Reactive
Programming
User
Experience
7

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

9. Copyright
©
2015,
Oracle
and/or
its
affiliates.
All
rights
reserved. 9

10. Copyright
©
2015,
Oracle
and/or
its
affiliates.
All
rights
reserved.
Community-­‐Prioritized
Features
10
http://glassfish.org/survey

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.
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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

15. Copyright
©
2015,
Oracle
and/or
its
affiliates.
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rights
reserved.
Different
styles
of
MVC
• Component-­‐based
MVC
• Action-­‐based
MVC
• Others
15

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

19. Copyright
©
2015,
Oracle
and/or
its
affiliates.
All
rights
reserved.
Agenda
Context
MVC
1.0
JSR
Conclusion
1
2
3
19

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

27. Copyright
©
2015,
Oracle
and/or
its
affiliates.
All
rights
reserved.
Model
• “Refers
to
the
data”
• 2
types
– javax.mvc.Models
interface
– CDI
@Named
bean
(recommended)
27

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.

35. Copyright
©
2015,
Oracle
and/or
its
affiliates.
All
rights
reserved.
Agenda
Context
MVC
1.0
JSR
Conclusion
1
2
3
35

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

41. Copyright
©
2015,
Oracle
and/or
its
affiliates.
All
rights
reserved.
Danke!
41

42. Copyright
©
2015,
Oracle
and/or
its
affiliates.
All
rights
reserved. 42