Apache Sling as an OSGi powered REST middleware
7Apache Sling is an innovative web framework built on top of the Java Content Repository (JCR), that uses OSGi for its component model and fosters RESTful application design.
Apache Sling is designed as a set of loosely coupled OSGi bundles aggregated into a single jar or war launcher. Extensibility is internally achieved by using OSGi services. Even though Sling was initially designed for JSR-283 content repositories, building on top of the OSGi service registry allows plugging in multiple data sources - resource providers in Sling parlance.
In this talk we will showcase the usage of OSGi extension points in Apache Sling which allows usage of multiple resource providers, from simple filesystem-based providers to complex ones like MongoDB or Cassandra. Running all providers at the same time allows Apache Sling to be used as a REST-based middleware for multiple data sources.
Robert Munteanu