WebLogic Event Server: A Lightweight, Modular Application Server for Event Processing

This paper describes WebLogic Event Server (WL EvS), an application server designed for hosting event-driven applications that require low latency and deterministic behavior. WL EvS is based on a modular architecture in which both server components and applications are represented as modules. The application programming model supports applications that are a mixture of reusable Java components and EPL (Event Processing Language), a query language that extends SQL with stream processing capabilities. WL EvS applications are meta-data driven, in that application behavior can be changed without recompilation or redeploying an application. The paper also presents the results of a benchmark performance study. The results show that the approach used by WL EvS can handle extremely high volumes of events while providing deterministic latency.