OSGi (Equinox) at the UK's Biggest Science Project, by Matthew Gerring

We run data acquisition at the UK's biggest science project using Java. This year we completed a migration of around three million lines of code in our Java servers to OSGi running with Equinox and declarative services. This is the story of how we did it, the pitfalls and real world examples of what happened. We will cover why it was decided to modernize the server, how OSGi allowed a single product to be made out of multiple ones, how Spring and OSGi can be made to interact efficiently, the importance of no dependency bundles with OSGi, getting cardinality right, problems when services become hundreds (not tens) and mixing TDD with OSGi.