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Down and Dirty with Java EE 7
Reza Rahman
Java EE/GlassFish Evangelist
Reza.Rahman@Oracle.com
@reza_rahman
Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Public 2
Program Agenda
Java EE 7
Cargo Tracker
The API Changes + The Code!
Looking Ahead…
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Java EE Past, Present and Future
J2EE 1.3
CMP,
Connector
Architecture
J2EE 1.4
Web
Services
Mgmt,
Deployment,
Async
Connector
Java EE 5
Ease of
Development,
EJB 3, JPA,
JSF, JAXB,
JAX-WS,
StAX, SAAJ
Java EE 6
Pruning,
Extensibility,
Ease of Dev,
JAX-RS
CDI
Validation
Web Profile
Servlet 3,
EJB 3.1 Lite
Java EE 7 JMS 2,
Batch, TX,
Concurrency,
Interceptor
WebSocket JSON
Web Profile JAX-RS 2
JAX-RPC,
CMP/ BMP,
JSR 88
J2EE 1.2
Servlet, JSP,
EJB, JMS,
RMI
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Java EE 7
Connector
1.6
Managed Beans 1.0 EJB 3.2
Servlet 3.1
Portable
Extension
s
JSF 2.2 JAX-RS
2.0
Bean
Valid
ati
on
1.1
JMS 2.0 JPA 2.1
EL 3.0
JTA 1.2
JSP 2.2
Interceptors 1.1 CDI 1.1
Common
Annotations
1.1
Updated Major
Release
New
Concurrency Utilities
(JSR 236)
Batch Applications
(JSR 352)
Java API for JSON
(JSR 353)
Java API for WebSocket
(JSR 356)
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Java EE in Action
http://cargotracker.java.net
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JMS 2
API modernization
– Dependency injection
– Fluent APIs
– Intelligent defaults
– Unchecked exceptions
New features
– Delivery delay, async send
Platform alignment
– MDB activation properties, JMS resource definition
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Java API for WebSocket
High level API for HTML 5 WebSockets
– Full-duplex TCP-like communication on the Web utilizing HTTP
Both client and server-side (Java SE and Java EE)
Both declarative and programmatic
Pluggable and extensible
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Java API for JSON Processing
Low level API to parse, generate, transform, query JSON
– JSON equivalent of JAXP
Object Model and Streaming API
– Similar to DOM and StAX
Binding JSON to Java objects forthcoming
– JSON equivalent of JAXB
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Bean Validation 1.1
Method constraints
– Very useful for JAX-RS and WebSocket
CDI Alignment
– All Bean Validation artifacts now injection capable
EL 3 integration
– More expressive validation messages
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JAX-RS 2
Client API
Message Filters & Entity Interceptors
– Servlet filters and CDI interceptors for JAX-RS
– Common configuration
Asynchronous Processing – Server & Client
Hypermedia support
– Transitional and structural links
Content negotiation
Bean Validation 1.1 integration
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JPA 2.1
Schema generation
Stored procedures
Unsynchronized persistence contexts
Entity Graphs
Entity converters
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JSF 2.2
HTML5 Support
– Pass-through elements and attributes
Managed beans deprecated/CDI alignment
– @ViewScoped for CDI
@FlowScoped
Stateless views
Resource library contracts
View actions
File upload component
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Batch Applications for the Java Platform
API for robust batch processing targeted to Java EE, Java SE
Common architecture
– Operator, repository, job, step, reader-processor-writer pattern
Common features
– Chunking, check-pointing, transactions, retries, exceptions, workflow,
parallelism
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Concurrency Utilities for Java EE
Provides simple, safe API for concurrency in Java EE
Builds on Java SE concurrency
– ManageExecutorService
– ManagedScheduledExecutorService
– ManagedThreadFactory
Relatively low-level API
Important enabler for Java EE ecosystem
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Concurrency Utilities for Java EE
Managed Task Executor
public class TestServlet extends HTTPServlet {
@Resource(name=“concurrent/MyExecutorService”)
ManagedExecutorService executor;
Future future = executor.submit(new MyTask());
class MyTask implements Runnable {
public void run() {
... // Task logic
}
}
}
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Yet More…
JTA 1.2
– @Transactional, @TransactionScoped
EL 3.0
– Standalone API, lambda expressions, collections, operators
Servlet 3.1
– Non-blocking I/O, upgrade to WebSocket, security
CDI 1.1
– Global enablement, @AroundConstruct, @Vetoed
EJB 3.2
– Truncating CMP/BMP
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Java EE 8
JSON-B
JCache
CDI 2
More CDI/EJB alignment
JMS.next()?
Security
Testability
Cloud, PaaS, multitenancy/SaaS
Action-oriented Web framework/HTML 5 alignment?
NoSQL?
Modularity?
http://glassfish.org/survey
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Try it Out!
4.0
http://download.java.net/glassfish/4.0/release/glassfish-4.0.zip
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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
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