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Last Build Date: Wed, 23 Aug 2017 12:18:44 +0000

 



OSGi Declarative Services – Configuration Binding

Tue, 01 Aug 2017 09:55:49 +0000

As explained in OSGi Components – Simply Simple – Part II when using Declarative Services (DS) you get support for configurations stored in a Configuration Admin service for free. At runtime especially when checking the status of the system – or looking for misconfigurations, there is always the question how to find out if a component is […]

The post OSGi Declarative Services – Configuration Binding appeared first on A Matter of Unimportance.




New OSGi Configuration Features in R7

Mon, 17 Jul 2017 14:59:25 +0000

The specification groups of the OSGi Alliance are currently in the process of finalizing the work for the upcoming OSGi R7 release. The major part of the specification work is done. This post explains some new functionality around OSGi configurations. Let’s start with a very brief introduction. Configuration Admin One of the most used but […]

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Http Whiteboard – Simply Simple – Part III

Fri, 07 Oct 2016 13:59:47 +0000

This is the next part in the series about the OSGi http whiteboard. In my last post I explained how to create an own application servlet context and how to register web components with this context. Bundle Resources Doing as outlined in that post, resource handling (the get resource methods on the servlet context) might […]

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Http Whiteboard – Simply Simple – Part II

Tue, 13 Sep 2016 21:43:16 +0000

Developing web components with OSGi can be very simple if you’re using the OSGi Http Whiteboard Specification (see OSGi Compendium Chapter 140). For example the Apache Felix Http Implementation supports this standard. Building your own Application With traditional web application development, you usually package your application into its own web application archive (war file) and […]

The post Http Whiteboard – Simply Simple – Part II appeared first on A Matter of Unimportance.




Building OSGi Bundles with Apache Maven

Fri, 20 May 2016 15:42:00 +0000

It seems that still today some developers think that creating an OSGi bundle is complicated – in contrast to simply creating a jar. Well, an OSGi bundle is a jar. The factor which distinguishes the two is that an OSGi bundle has additional manifest entries. Adding those using the right tooling is really simple. The […]

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Migrating from the Apache Felix SCR Annotations to the OSGi Declarative Services Annotations

Sat, 07 May 2016 00:18:02 +0000

The Java annotations of the Apache Felix SCR Plugin were one of the first options to use annotations to create the descriptors for OSGi Declarative Services components and OSGi metatype descriptions for the configuration of such components. With the OSGi R6 release from 2015, the annotations of the OSGi specifications provide the same functionality and go […]

The post Migrating from the Apache Felix SCR Annotations to the OSGi Declarative Services Annotations appeared first on A Matter of Unimportance.




Example OSGi Web Application

Mon, 25 Apr 2016 00:29:14 +0000

In some of my OSGi talks I use the “Guessing Game” as the next great web application to conquer the world. It’s a web app that generates a random number and let’s you guess it, telling you whether you made it, are too high or too low. You can find the latest sample code on github. […]

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Http Whiteboard – Simply Simple – Part I

Mon, 25 Apr 2016 00:15:49 +0000

Developing web components with OSGi can be very simple if you’re using the OSGi Http Whiteboard Specification (see OSGi Compendium Chapter 140). For example the Apache Felix Http Implementation supports this standard. In this part of the tutorial we start pretty simple and just look at how to develop a servlet and register it as […]

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OSGi Components – Simply Simple – Part III

Fri, 27 Nov 2015 13:40:49 +0000

In the previous two parts (Part I and Part II) you learned how to use Declarative Services to develop your own components and services for OSGi. The topics included: Creating components Component lifecycle Component configuration Using services through references Providing services In this part we’ll cover another interesting topic: Metatype Generation The metatype specification (OSGi Compendium Chapter […]

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OSGi Components – Simply Simple – Part II

Mon, 31 Aug 2015 09:23:09 +0000

In part I I motivated that developing OSGi components is plain and simple by Declarative Services and the provided annotations. We learned how to create a component, add lifecycle methods and reference services. If you haven’t read the first part yet, make sure to go there first. Usually a component takes some configuration. So let’s […]

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