Google App Engine (GAE) is a popular PaaS offering. Where its scalable and reliable environment is hidden behind a custom API. This makes GAE apps hard to port over to other non-GAE environments. But what if one could implement such similar environment? And you could simply move your GAE application’s .war file to this new environment and it would just work? After all, at the end it’s all about the API, plus scalable and reliable services. JBoss CapeDwarf project aims at making this a reality. This presentation will provide a glimpse into what it takes to implement something as GAE, ranging from runtime integration with JBoss Application Server, actual services implementation to last but not least, automated heavy testing.