I’m going to be spending some time over the next couple of weeks learning about OSGi – there is an application at work that we want to try and make more modular. In particular, we’d like to be able to share the back tier with more front end clients. The more conventional modularisation techniques, such as EJBs, have been tried and didn’t work fairly well. Simply creating more deployments is prohibitive, due to hardward And before someone asks “why not just stick a web service on it and share that way” – some of the front end clients will be those web services. To cut a long story short, one of the options we want to check out is OSGi.
The only problem is that there isn’t much in the way written up on the web about writing OSGi components – at least not without invoking magic tools (e.g. Maven plugins) that don’t work on any version of any tool developed six months later. Which is odd, because OSGi, as a spec, doesn’t look that hard to write too. So, I thought I’d write up a series describing the initial investigative spikes, starting as close to the metal as possible and working up.
Continue reading “OSGi Diaries – A short series”