This is a relatively simple project just meant as a technology demonstration of a JRuby Rack app published to an HttpService running within an OSGi framework where the Rack handler then uses the OSGi service registry to obtain an ICalculator service to use for handling certain requests.
Currently requires org.jruby.rack.OSGiRackApplicationFactory available from: https://github.com/ajuckel/jruby-rack/tree/osgi.
The ICalculator interface is provided by the net.juckel.jruby.osgi.web bundle, and an implementation is available both via the net.juckel.jruby.osgi.slowcalc and net.juckel.jruby.osgi.fastcalc bundles. These implementations are published via OSGi's Declarative Services mechanism, so simply starting the bundles in a runtime with Declarative Services running should publish the service implementations.
When running the app