Have You Seen Java EE Lately?

Have You Seen Java EE
Lately?
Reza Rahman
Java EE/GlassFish Evangelist
reza.rahman@oracle.com
@reza_rahman

Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Public2
Program Agenda
 Java EE Overview
 Cargo Tracker
 API Overview + Demo
 The Ecosystem
 Looking Ahead

Java EE Past, Present, & Future
J2EE 1.3
CMP,
JCA
J2EE 1.4
Web
Services
,
Mgmt,
Deplymn
t
Java EE 5
Ease of
Use,
EJB 3,
JPA, JSF,
JAXB,
JAX-WS
Java EE 6
Pruning,
Ease of
Use,
JAX-RS,
CDI,
Bean-
Validation
Web
Profile
Servlet 3,
EJB 3.1
Lite
Java EE 7
JMS 2,
Batch, TX,
Concurr,
Web-
Sockets,
JSON
Web Profile
JAX-RS 2
J2EE 1.2
Servlet,
JSP, EJB,
JMS, RMI

J2EE 1.3
CMP,
JCA
J2EE 1.4
Web
Services
,
Mgmt,
Deplymn
t
Java EE 5
Ease of
Use,
EJB 3,
JPA, JSF,
JAXB,
JAX-WS
Java EE 6
Pruning,
Ease of
Use,
JAX-RS,
CDI,
Bean-
Validation
Web
Profile
Servlet 3,
EJB 3.1
Lite
Java EE 7
JMS 2,
Batch, TX,
Concurr,
Web-
Sockets,
JSON
Web Profile
JAX-RS 2
J2EE 1.2
Servlet,
JSP, EJB,
JMS, RMI

Java EE Today

Java EE Today
Core Principles
 Open vendor neutral technical standard
 Stable core for a strong ecosystem
 Fully integrated runtime, intelligent defaults and convention-over-
configuration
 Non-redundant APIs with specialized roles
 Minimalism, simplicity and productivity
 Java centric – strong static typing, strongly Object Oriented,
focused on “blue collar” developers, strongly backwards
compatible

Java EE Today
What it is Not
 No XML hell
 No configuration hell
 No jar/dependency hell
 No feature bloat
 No snake-oil/hypeware
 No bloated deployments
 No lock-in

Java EE 7
EJB 3EJB 3
ServletServlet
JSFJSF JAX-RSJAX-RS
JMSJMS CDICDI
JPAJPA
UpdatedMajor
Release
New
Batch
Applications
Batch
Applications
JavaMailJavaMail
JAX-WSJAX-WS
BeanValidationBeanValidation
Java API for
JSON
Java API for
JSON
Java API for
WebSocket
Java API for
WebSocket
JTAJTAJCAJCAJACCJACC JASPICJASPIC
JAXBJAXB
Unchanged

Java EE Demo Application
http://cargotracker.java.net

JSF
 True MVC, component oriented, productive
 Facelets for view
– XHTML
– Templating
– Composite components
 Data, event binding to CDI via EL
 Validation, conversion, navigation, flow
 Supports AJAX, HTML 5
 Strong plug-in ecosystem
– PrimeFaces, RichFaces, ADF Faces, many others

JSF API
 Facelets tags
– <ui:composition>, <ui:define>, <ui:insert>,
<ui:component>, <ui:repeat>
 HTML tags
– <h:form>, <h:inputText>, <h:selectOneMenu>,
<h:commandButton>, <h:commandLink>, <h:panelGrid>
 Core tags
– <f:convert...>, <f:validat...>, <f:ajax>
 Event/data binding to CDI via EL
– <h:inputText … value=“#{hello.name}” …>
 CDI Scopes
– @ViewScoped, @FlowScoped

CDI
 Next generation type-safe dependency management
 Large number of component scopes
 Interceptors/decorators
 Type-safe events
 Portable extensions API to integrate third-party tools and
frameworks cleanly to Java EE
– DeltaSpike, Forge, Agorava, MyBatis-CDI, PicketLink, many more
 Improving testability
– Arquillian

CDI API
 Basic dependency injection
– @Inject, @Qualifier, @Stereotype, @Alternative,
@Named, @Produces, @Disposes
 Context management
– @RequestScoped, @SessionScoped, @ConversationScoped,
@ApplicationScoped, @Scope (@FlowScoped, @ViewScoped,
@TransactionScoped)
 Lightweight events
– Event, @Observes
 Interceptors/decorators
– @Interceptor, @InterceptorBinding, @AroundInvoke,
@Decorator, @Delegate
 Portable extensions SPI

EJB 3
 Enterprise service components
– Thread-safe, transactional, bandwidth-throttled, monitored
 Just POJOs + annotations
 Component types
– @Stateless, @Stateful, @Singleton, @MessageDriven
 Services
– @TransactionAttribute (JTA/CDI @Transactional),
@RolesAllowed, @RunAs, @Asynchronous, @Schedule,
@Lock, @Remote

JPA
 ORM mapping/domain modeling
 CRUD EntityManager API
 Rich query capabilities
– JPQL
– Criteria Queries
– Native Queries
– Stored procedures
 Caching
 Small plug-in ecosystem
– QueryDSL, DeltaSpike Query Module, Spring Data/CDI

JPA API
 Domain modeling
– @Entity, @Embeddable, @OneToOne, @OneToMany,
@ManyToOne, @ManyToMany, @ElementCollection, @Id
 Relational mapping
– @Table, @Column, @JoinColumn, @JoinTable, @Basic,
@Lob, @Temporal, @Enumerated, @Cacheable
 CRUD API
– EntityManager, Query, CriteriaQuery,
@PersistenceContext, @NamedQuery, @NamedNativeQuery,
@NamedStoredProcedureQuery

Bean Validation
 Declarative constraint management across application layers
 Constraint
– Restriction on a bean, field, property, method parameter, return value
– Not null, between 10 and 45, valid email, etc
– @Max, @Min, @Size, @NotNull, @Pattern, @Future, @Past
– Custom constraints
– Evaluated automatically
 Integrated with JSF, JPA, CDI, JAX-RS

JMS 2
 Reliable asynchronous messaging API for Java
 Point-to-point (queues), publish-subscribe (topic)
 Small, powerful API
– Message, Destination, Queue, Topic,
ConnectionFactory, Connection, Session,
MessageProducer, MessageConsumer, JMSContext,
JMSProducer, JMSConsumer, MessageListener,
@JMSConnectionFactory
 Message types
– TextMessage, ObjectMessage, BytesMessage,
MapMessage, StreamMessage

JAX-RS 2
 REST development API for Java
 Server and client
 Annotation based
– @Path, @GET, @POST, @PUT, @DELETE, @PathParam,
@QueryParam, @Produces, @Consumes
 Pluggable and extensible
– Providers, filters, interceptors

Java API for WebSocket
 High level declarative API for WebSocket
 Both client and server-side
 Small, powerful API
– @ServerEndpoint, @OnOpen, @OnClose, @OnMessage,
@OnError, Session, Remote
 Pluggable and extensible
– Encoders, decoders, sub-protocols

Java EE Platforms
GlassFishJava EE 7
Java EE 6
TomEE

Java EE Ecosystem

Java EE 8 Community Survey
https://java.net/downloads/javaee-spec/JavaEE8_Community_Survey_Results.pdf
https://blogs.oracle.com/ldemichiel/entry/results_from_the_java_ee

Java EE 8 Possibilities
 Web Standards/HTML5 Alignment
– HTTP2, SSE, JSON-B, JSON-P, action-oriented web framework,
hypermedia
 Cloud
– Simple security providers, REST management/monitoring
 CDI Alignment
– CDI 2, EJB services outside EJB, EJB pruning
 Enterprise
– JCache, Configuration, JMS
 Java SE 8 alignment

Adopt-a-JSR for Java EE 8
 Grassroots participation to shape Java EE
 Launched in Java EE 7 time-frame, key community element for
Java EE 8
– 30 Java user groups participating!
http://glassfish.org/adoptajsr

Resources
 Java EE Tutorials
– http://docs.oracle.com/javaee/7/tutorial/doc/home.htm
 Digging Deeper
– http://docs.oracle.com/javaee/7/firstcup/doc/home.htm
– https://glassfish.java.net/hol/
– https://java.net/projects/cargotracker/
 Java EE 7 Transparent Expert Groups
– http://javaee-spec.java.net
 Java EE 7 Reference Implementation
– http://glassfish.org
 The Aquarium
– http://blogs.oracle.com/theaquarium

Have You Seen Java EE Lately?

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Editor's Notes