A publish/subscribe CORBA persistent state service prototype

Abstract

An important class of information dissemination applications requires 1:n communication and access to persistent datastores. CORBA’s new Persistent State Service combined with messaging capabilities offer the possibility of efficiently realizing information brokers between data sources and CORBA clients. In this paper we present a prototype implementation of the PSS that exploits the reliable multicast capabilities of an existing middleware platform. This publish/subscribe architecture makes it possible to implement an efficient update propagation mechanism and snooping caches as a generic service for information dissemination applications. The implementation is presented in some detail and implications of the design are discussed. We illustrate the use of a publish/subscribe PSS by applying it to an auction scenario.