Java Magazine - January/February 2012

Cloud/Java EE
Looking Ahead to Java EE 7
Get educated about Java EE 7 JSRs.
ARUN GUP TA

With the release of Java EE 7 scheduled for the second half of 2012, projected JSRs are all up and running. The Java EE 7 release, which will reflect the evolving needs of the industry as it moves into the cloud, is date driven: anything not ready will be deferred to Java EE 8.

Here is an update and summary of the key features of different specifications in the Java EE 7 platform.

■ ■ Possible inclusion of JAX-RS 2.0 in the Web Profile, revised JMS 2.0 API

■ ■ Technology refresh for several existing technologies and possible inclusion of Concurrency Utilities for Java EE (JSR-236) and JCache (JSR-107)

■ ■ Status:

■ ■ Approved by the JCP

■ ■ Spec leads: Linda DeMichiel, Bill Shannon (Oracle)

■ ■ Project page

■ ■ Mailing list archive, jsr342-expert@javaee-spec . java.net, users@javaee- spec.java.net

■ ■ Project page

■ ■ Mailing list archive, jsr338- experts@jpa-spec.java.net, users@jpa-sepc.java.net

Java Servlet 3. 1 Specification
(JSR-340)

■ ■ Optimize the PaaS model for Web applications

■ ■ Multitenancy for security, session, and resources

■ ■ Asynchronous IO based on NIO2

■ ■ Simplified asynchronous Servlets

■ ■ Utilize Java EE concurrency utilities

■ ■ Enable support for WebSockets ■ ■ Status:

■ ■ Approved by the JCP

■ ■ Spec leads: Shing-Wai Chan, Rajiv Mordani (Oracle)

■ ■ Project page

■ ■ Mailing list archive, jsr340- experts@servlet-spec.java .net, users@servlet-spec . java.net

JAVA IN ACTION ABOUT US

blog

PHOTOGRAPH BY MARGOT HARTFORD

Java EE 7 Specification (JSR-342)

■ ■ Main theme: to easily run applications on private or public clouds

■ ■ The platform will define an application metadata descriptor to describe the PaaS execution environment such as multitenancy, resources sharing, quality of service, and dependencies between applications

■ ■ Embrace latest standards like HTML5, WebSocket, and JSON and have a standards-based API for each one of them

■ ■ Remove inconsistencies between Managed Beans, EJBs, Servlets, JSF, CDI, and JAX-RS

Java Persistence 2. 1 (JSR-338)

■ ■ Support for multitenancy

■ ■ Support for stored procedures and vendor function

■ ■ Update and Delete Criteria queries

■ ■ Support for schema generation

■ ■ Persistence Context synchronization

■ ■ CDI injection into listeners

■ ■ Status:

■ ■ Approved by the JCP

■ ■ Spec lead: Linda DeMichiel (Oracle)

JAX-RS 2.0: The Java API for
RESTful Web Services (JSR-339)

■ ■ Client API—low level using
builder pattern and possibly a
higher level on top of that
■ ■ Hypermedia—easily create and
process links associated with
resources
■ ■ Form or Query parameter vali-
dation using Bean validation
■ ■ Closer integration with @Inject
■ ■ Server-side asynchronous
request processing