ApacheCon EU 2014

In the last few years, OSGi has become ""the"" module system for Java - but is OSGi just for gurus, or are mere mortals actually able to use it?
The simple tutorial RESTful server application presented in this talk aims to demonstrate that the average Java developer can actually use OSGi, and greatly benefit from it. It is built from scratch based on a set of standard and custom OSGi services, in a simple and understandable way.
Taking advantage of a number of build plugins and runtime tools provided by the Apache Felix and Apache Sling projects allows us to write little code in our example application, while exposing the advantages of an OSGi-based architecture in a simple and convincing way.

Our challenge was to track the location 200k people at a large festival using custom made wristbands, on a tight budget and preferably with only open source software. In this presentation we will briefly outline the overall system architecture, and subsequently focus on the software stack used to make this work. In essence, we need the versatility of cloud computing, but in a ""camping-style data centre"" We will show how Apache Felix, an OSGi runtime, provides the necessary mix of dynamism and efficiency to pull this off.