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Modular Java: Static Modularity

Modularity is an important aspect of large Java systems. Build scripts and projects are often split up into modules in order to improve the build, but this is rarely taken into account at runtime. This second part of the Modular Java series discusses static modularity, the creation of bundles, how to install them into an OSGi engine and how to set up (versioned) dependencies between bundles.

Alex Blewitt
on Oct 24, 2009
Modular Java: What Is It?

Over the last few years, modularity for Java has been an active discussion topic. From the (now defunct) JSR 277 to the recognition of JSR 291 and the ongoing JSR 294, modularity is seen as a necessary step in Java's evolution. Even future JVM-based languages like Scala are considering modularity. So, what does modularity mean, and why should you care?

Alex Blewitt
on Sep 23, 2009
Service Dynamics: the lazy man's way

This article describes "the hardest topic in OSGi, how to deal with service dynamics," based on personal experience. Two factors, concurrency and direct service references, make the problem "fiendishly hard." An import and an export policy should form a comprehensive doctrine for dealing with service dynamics and the article explores two export policies with their corresponding doctrines.

Todor Boev
on Jul 29, 2009
Why Do We Need Distributed OSGi?

Recently, an early release draft of a Distributed OSGi requirements and design document has been published, long with a reference implementation as part of Apache CXF. In a new article, Eric Newcomer writes about the current status of distributed OSGi and explains the reasons for standardizing it in the first place, and its significance to the OSGi specification and community.

Eric Newcomer
on Feb 23, 2009
Java 7 Module System Concerns

Java module systems has received a lot of attention lately. One reason for that was the controversy regarding JSR-277 which partially duplicated OSGi. Another was the plans for Java 7. In this article Lukas Krecan gives us a round-up of the current solutions and presents his concern on upcoming solutions like project Project Jigsaw and JSR-294.

Lukas Krecan
on Jan 28, 2009
Development

Domain Driven Design and Development In Practice

In this article, Srini Penchikala discusses Domain Driven Design and Development from a practical stand-point. The article looks at architectural and design guidelines and best practices that can be used in a DDD project. It also talks about the impact of various design concerns like Persistence, Caching, Transaction Management, Security, Code Generation etc in domain model implementation effort.

Srini Penchikala
on Jun 12, 2008
Eric Newcomer on the future of OSGi

Eric Newcomer, co-chair of the OSGi Enterprise work group, talks about the evolution of OSGi and it's relationship to SOA and ESB. He discusses how he thinks OSGi will evolve over the coming years and whether or not it makes sense for Sun to adopt OSGi as the container model of choice."

Mark Little
on Jul 13, 2007
Java

An Update on Spring 2.0 Final

Spring 2.0 was initially supposed to come out in June/July, why the delay? InfoQ interviewed the Spring team - based on massive community feedback, the team has chosen to delay the launch to Sept 26th in order work on asynchronous JMS capabilities, JPA, the new JSP form tag library, OSGi integration, documentation, and backwards compatibility.

Floyd Marinescu
on Sep 05, 2006