The present invention concerns a method and system for enabling a server application to be executed in the same Java Virtual Machine (VM) as a client application using direct Java method calls without the need for remote communications protocol processing of the method calls. This is achieved by providing an application program interface (API) that exposes objects comprising the server application program to the client application program, whereby a client application method call is reduced by the interface to a Plain Old Java Objects (POJO) method call.