Porting great infrastructure to OSGi often means solving complex classloading problems. This article is dedicated to the frameworks that face the hardest issues in this area: those that do dynamic code generation. Incidentally these are also the coolest frameworks: AOP wrappers, ORM mappers, and service proxy generators are just a few examples.
Sonatype, the professional services company that sponsors the development of many key Maven committers, has announced that they will build Maven 3 atop the Guice Dependency Injection (DI) container instead of the Plexus DI container employed for Maven 1 and 2. Backwards compatability will be ensured using a shim to support Plexus.
Dependency Injection has become a much more accepted and accessible approach in recent years, driven by many factors including increased popularity in SOA, TDD, and many other factors. With this has come increased usage of Dependency Injection frameworks. Bob Martin advises, with examples, applying a decoupling approach between your application code and your Dependency Injection framework.
Sitebricks is a new web application development framework from Google that is built on top of Google Guice, and focuses on early error detection, low-footprint code, and fast development. InfoQ had a Q&A with the creator and Google Wave Core Engineer Dhanji Prasanna.
Earlier this year, Google and SpringSource announced that they were co-operating on a standard set of annotations to be used for dependency injection which were proposed via JSR-330. These annotations didn't line up with those proposed for JSR-299, which generated controversy that has now been resolved, with JSR-299 adopting the JSR-330 annotations and both moving forward to be part of Java EE 6.
Guice, a lightweight Java dependency injection framework created by Google, recently released version 2.0. InfoQ spoke with Google Developer Team member Jesse Wilson to learn more about this release and what capabilities it adds to Guice.
Dependency Injection by Dhanji R. Prasanna is a book that tries to explore the DI idiom in detail, and present techniques in Spring and Guice. Dhanji is a Google software engineer who works on Google Wave and also contributes to Guice, MVEL, and other open source projects.
Effective Java, Second Edition by Joshua Bloch is an updated version of the classic first edition, which was the winner of a 2001 Jolt Award. This edition has been updated to discuss Java 6 language features including generics, enums, annotations, autoboxing, the for-each loop, varargs, and concurrency utilities. InfoQ asked Bloch several questions about the areas that the new edition covers.
Dependency Injection has been around for a while, and many teams are refactoring their applications to use DI. But it can be a struggle. In this article, Paul Hammant explains the route to take to move an existing application from a nest-of-singletons design to a full fledged DI design.
