Dependency Injection in Java EE 6 - Part 1

Dependency Injection in Java EE 6 - Part 1

This series of articles introduces Contexts and Dependency Injection for Java EE (CDI), a key part of the soon to be finalized Java EE 6 platform. Standardized via JSR 299, CDI is the de-facto API for comprehensive next-generation type-safe dependency injection for Java EE. Led by Gavin King, JSR 299 aims to synthesize the best-of-breed dependency injection features from solutions like Seam, Guice and Spring while adding many useful innovations of its own.

In this first article of the series, we are going to take a high-level look at CDI, see how it fits with Java EE overall and discuss basic dependency management as well as scoping. In the course of this series, we will cover features like component naming, stereotypes, producers, disposers, decorators, interceptors, events, the CDI API for portable extensions and many more. We will also talk about how CDI aligns with Seam, Spring as well as Guice and augment the discussion with some implementation details using CanDI, C

This series of articles introduces Contexts and Dependency Injection for Java EE (CDI), a key part of the soon to be finalized Java EE 6 platform. Standardized via JSR 299, CDI is the de-facto API for comprehensive next-generation type-safe dependency injection for Java EE. Led by Gavin King, JSR 299 aims to synthesize the best-of-breed dependency injection features from solutions like Seam, Guice and Spring while adding many useful innovations of its own.

In this first article of the series, we are going to take a high-level look at CDI, see how it fits with Java EE overall and discuss basic dependency management as well as scoping. In the course of this series, we will cover features like component naming, stereotypes, producers, disposers, decorators, interceptors, events, the CDI API for portable extensions and many more. We will also talk about how CDI aligns with Seam, Spring as well as Guice and augment the discussion with some implementation details using CanDI, Caucho's independent implementation of JSR 299 included in the Resin application server.

aucho's independent implementation of JSR 299 included in the Resin application server.

continue ... Dependency Injection in Java EE 6

An update on Java Persistence API 2.0

The Java™ Persistence API (JPA) was first introduced in Java Platform Enterprise Edition (Java EE) 5 as part of the Enterprise JavaBean™ (EJB) 3.0 family of specifications Since that time, JPA 1.0 has proven to be a very popular persistence framework. Even though this first specification was very complete and functional, there is always room for improvement. The next iteration of the JPA specification (JPA 2.0) is currently under development via JSR 317.

The JPA expert group is working hard to finalize the JPA 2.0 specification. Public Final Draft #2 of the specification was recently made available, and the final JPA 2.0 specification is planned to be available by November 16, 2009.

A single Comment Line column cannot do justice to all the new features in the JPA 2.0 specification. Instead, brief introductions will be made via this article followed by information to help you go experience these features firsthand via Apache’s OpenJPA project.

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How TDD and Pairing Increase Production

"Test-driven Development" and "Pair Programming" are two of the most widely known of agile practices, yet are still largely not being practiced by many agile teams. Often, people will cite being "too busy" to adopt such practices as TDD and pairing; in essence, implying that striving for high code quality will reduce productivity. Mike Hill explains how this logic is seriously flawed.

Mike tells us, essentially, that one must "go better" if they want to "go faster"