A plug-in framework can be used in an integration system to extend business process management functionality. A plug-in manager, which can be part of an integration process engine, is used to support configuration, design, and run-time management of the plug-ins. A plug-in API is used to provide support for configuration, design, and run-time interactions between the process engine and a deployed plug-in. The plug-in API can consist of components such as session beans, run-time management classes, and packages.This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures, and the claims.