The situation manager component of amit – Active middleware technology

Abstract

Reactive applications are applications that include a substantial processing that is triggered by events. This paper describes an application development tool that resolves a major problem in this area: the gap that exists between events that are reported by various channels, and the reactive situations that are the cases to which the system should react. These situations are composition of events or other situations (e.g. “when at least four events of the same type occurred”) or content filtering on events (e.g. “only events that relates to IBM stocks”) or both (“when at least four purchases of more than 50,000 shares have been performed on IBM stocks in a single week”). The paper describes the generic application development tool that is being developed within Amit (active middleware technologies) project in HRL, describes its language and features and demonstrate some of its capabilities using examples.