Integrating an event pattern mechanism in a status dissemination middleware

GridStat is a QoS-managed publish-subscribe data delivery service designed for the specific needs of delivering real-time operational data for the electric power grid and other critical infrastructures. One of the core mechanisms of GridStat is the condensation function mechanism, which allows application logic, i.e. event patterns, to be performed at the middleware level. The user defines patters using a GUIbased event specification tool, which are then loaded in the middleware. By performing the computation for event patters at the middleware layer both computational and network resources are saved. In addition, it simplifies the task of the distributed application development as the defined event patters can be reused.