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MAEXO - Integrating OSGi and Java Management Extensions
Last year I've been working on a customer project which aimed to create a modular integration platform using ServiceMix, Camel and ActiveMQ. We used an OSGi container (Equinox) in conjunction with Spring Dynamic Modules as deployment and service infrastructure. One important requirement was manageability of the platform at runtime using a JMX console. All of our components allowed this by offering MBeans - except the OSGi container. Doing some research revealed that there already exist projects addressing this issue but none of them could really satisfy our needs: a small set of dependencies and MBean implementations which can be used with generic JMX consoles like JConsole or VisualVM.
Driven by personal interest on the technologies a project called MAEXO - Management Extensions for OSGi has been initiated. It is licensed under Apache Software License 2.0 and now available in version 1.0.0 from Google Code (see link below).
The main parts are the infrastructure to publish MBeans within an OSGi container and MBeans for entities and services of the OSGi Core specification. As a side effect a programming model is offered to easily make OSGi based applications manageable using JMX: the simple rule is to publish MBeans as an OSGi service. MAEXO has only one external dependency to a logging framework (SLF4j) which means that there's not much effort in getting all up and running. The distribution contains some samples which provide a first impression of all that within a few minutes.
A final note: MAEXO currently is a "proprietary" solution and not related to RFC 139 (JMX Control of OSGi, part of the future OSGi service platform specification 4.2). As both address the same problem MAEXO will probably become an implementation of that standard.
You can find more information on the MAEXO web site http://code.google.com/p/maexo. If you're interested give it a try, feedback is highly appreciated.
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Reza Rahman continues to explore the features of the proposed JSR 299, Contexts and Dependency Injection for Java EE (CDI). When approved, it promises to be a key feature of Java EE 6.
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Ted Neward is an independent consultant specializing in high-scale enterprise systems, and an authority in Java and .NET technologies. He is the author and co-author of several books, including Effective Enterprise Java. At TheServerSide Java Symposium in March, he will be presenting sessions on pragmatic architecture, ECMAScript and Scala.
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Ari Zilka, CTO of Terracotta, Inc., talks about the new features in Terracotta 3.1, announced during JavaOne and available now.
(June 15, Tech Talk)
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In this Tech Talk, David Geary teaches you: The basics of Google Web Toolkit; How to implement Ajax-enabled applications in Java; Internationalization; Hooking into the browser history mechanism; Remote procedure calls.
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Gil demonstrates how new, aggressive uses of already abundant compute capacity by common applications offer competitive value for application designers.
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