Enterprise Edition (Java EE) 6 Overview 2940

8/14/2019 Enterprise Edition (Java EE) 6 Overview 2940

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Java Platform,Enterprise Edition (Java

EE) 6 Overview

Roberto Chinnici

Sun Microsystems, Inc.

2940


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Agenda

> Java EE Platform evolut ion

> Theme and features

> Components (JSRs)

> Timeline> Get involved!

> The Great Web Profile Poll


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Ease of Developm ent Focus

Major Revamp of Programming Model

EJB 3.0 support for POJOs means less to

learn, less to code and less to maintain

New Java Persistence API makes object /

relational mapping cleaner and easier

New and updated W eb Services (JAX-W S 2.0

and JAXB 2.0) simplifies SOA implem entationJavaServer Faces 1.2 facilitates building

W eb 2.0 Applications with AJAX

Annotations often eliminate the need for

deployment descriptors

Supported by NetBeans

5.5 EnterprisePack

Get the SDK:

http://java.sun.com /javaee/downloads/

Java EE 5


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Java EE 5 Implementations


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History of Enterprise Java

May 1998 Dec 1999 Sept 2001 Nov 2003 March 20050

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

JPEProject

J2EE 1.2

Servlet , JSP,EJB, JMSRMI/ IIOP

J2EE 1.3CMP,

ConnectorArchitecture

J2EE 1.4Web Services,

Management,Deployment,Async.

Connector

Java EE 5Ease ofDevelopmentAnnotationsEJB 3.0Persistence API

New andUpdated

Web Services

Robustness

WebServices

EnterpriseJava

Platform

`

Ease ofDevelopment


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Theme for Java EE 6

Rightsizing

=Flexibility, Focus, Simplification


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Rightsizing Explained

> Enable flexibility at development and deployment

> Make it possible to focus on specif ic classes ofapplications

> Simplify by removing rarely used or superseded APIs


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New Java EE 6 Features

> Profiles

> Pruning

> Extensibility

> More ease of development


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Profiles

> Rules defined by the Java EE Platform spec

> Profiles can be

proper subsets

proper supersets overlapping (drop something, add something

else)

> Web Prof ile defined right away

> Other prof iles fol low regular JCP process


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Pruning

> Make some components optional

> Strong signal for all new development work

> Same rules proposed by Java SE

pruned now, optional in next release> Pruning candidates:

JAX- RPC, EJB Entity Beans

JAXR, JSR- 88


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Extensibility

> Embrace open source libraries and frameworks

> Create a level playing field

> Enable simple pluggabili ty of technologies

> Script ing as a f irst- class cit izen


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Ease of Development in the WebTier> Use of annotations across all web APIs

> No edit ing of web.xml required

> Self- registration of third- party libraries

> Simplif ied packaging> JAX- RS for RESTful web services

> Script ing support via extensibili ty


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JAX- RS Sampleimport javax.ws.rs.*;

import org.apache.abdera.model.*;

@Path("activitylog")

@ProduceMime("applicat ion/ atom+ xml")

public class ActivityLog {@GET

public Feed getFeed() {...}

@GET @Path("{id}")

public Entry getEntry(@PathParam("id") String id) {...}

}


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EJB 3.1

> Singletons

> Opt ional local interfaces

> Simplif ied packaging in web apps

> Applicat ion startup/ shutdown events> Calendar- based t imers

> Global JNDI names

> EJB Lite


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EJB 3.1 Sample (1)@Startup

@Singleton

public class SingleBean {

@PostConstruct

public void onStartup() {... applicat ion ini t ialization code goes here ...

}

... more methods to access shared data ...

}


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EJB 3.1 Sample (2)@Stateless

publ ic class TimerBean {

@Schedule(dayOfWeek= Sun)

public void onSunday() {... periodically do some work ...

}

}


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EJB 3.1 Sample (3)@Stateless

publ ic class HelloWorldBean/ * no interface */ {

publ ic String hello(String name) {

return hello, + name;

}}

@EJBHelloWorldBean hello;

hello.hello(David);


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New JSRs in Java EE 6

> EJB 3.1

> JPA 2.0

> Servlet 3.0

> JSF 2.1> JAX- RS 1.0

> WebBeans 1.0

> Java Connector Archi tecture 1.6


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More JSRs We Track

> Bean Validation (JSR- 303)

> Timer API (JSR- 236)

> Work Manager API (JSR- 237)


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Other Components

> Java SE 6 underneath

> Point updates:

JAX- WS 2.2

JSR- 109 1.3 JSP 2.2

> Completed JSRs:

JSR- 196

JAXB 2.2


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Timeline

> June 2007 Expert group formed

> Q3 2008 Public draft

> Q4 2008 Proposed f inal draft

> Q2 2009 Final release


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Participate!

> Early/ publ ic drafts available for many of the specs

> Send feedback

> Cont ribute to the GlassFish implementat ion

> Use TP2, blog about it


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GlassFish V3

> Open source implementat ion of Java EE 6

> Fully modular, extensible

> OSGi R4 based

> Small footpr int , fast startup> Mult ip le containers, including JRuby, Groovy


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Web Profile Options (from my blog)

> Aservlets, JSP, JSTL, EL, JSR- 45, JSR- 250

> B = A +

EJB Lite, JTA, JPA, JSF, WebBeans

> C = Full Platform = B +

JAX- RS, Connectors, JMS, JAF, JavaMail,

JAX- WS, JAXB, JSR- 181, JSR- 109,

JSR- 115, JSR- 196, JSR- 77,

JAX- RPC*, JAXR*, JSR- 88*


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Java.net Poll

> 1. A small set of JSRs

> 2. A larger set of JSRs wi thout JSR or WebBeans

> 3. A larger set of JSRs with JSR and WebBeans

> 4. I'm not interested in Java EE 6 prof iles


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Java.net Poll (Results)

> 1. A small set of JSRs

> 2. A larger set of JSRs without JSR or

WebBeans

> 3. A larger set of JSRs with JSR and WebBeans

> 4. I'm not interested in Java EE 6 prof iles

17%

11.9%

46.7%

24.2%


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Q&A


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Roberto Chinnicihttp:/ / weblogs.java.net/ blog/ robc/

Sun Microsystems, Inc. [email protected]

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Enterprise Edition (Java EE) 6 Overview 2940