Composite Subscriptions in Content-Based Publish/Subscribe Systems

Distributed publish/subscribe systems are naturally suited for processing events in distributed systems. However, support for expressing patterns about disparate events and algorithms for detecting correlations about these events are still largely unexplored. Inspired from requirements of decentralized, event-driven workflow processing, we design a subscription language for expressing correlations among disparate events. We illustrate the potential of our approach on a workflow management case study. The language is validated and implemented in PADRES, a novel distributed, content-based publish/subscribe system. In this paper we present an overview of PADRES, highlighting some of its novel features, including the composite subscription language, the coordination patterns, the composite event detection algorithms, the rule-based router design, and a detailed case study illustrating the decentralized processing of workflows. Our experimental evaluation shows that rule-based brokers ar...

• Type: Conference
• Year: 2005
• Where: MIDDLEWARE
• Authors: Guoli Li, Hans-Arno Jacobsen
• Keywords: Disparate Events, MIDDLEWARE 2005, Publish/subscribe System, Subscription Language