Snoop: an expressive event specification language for active databases
Data & Knowledge Engineering
Design of Dynamically Reconfigurable Real-Time Software Using Port-Based Objects
IEEE Transactions on Software Engineering
COMPOSE: A System For Composite Specification And Detection
Advanced Database Systems
Two Approaches to Event Definition
DEXA '02 Proceedings of the 13th International Conference on Database and Expert Systems Applications
An event detection algebra for reactive systems
Proceedings of the 4th ACM international conference on Embedded software
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In this article we present how the component triggering in SaveCCM, a component model intended for embedded vehicular systems, can be extended by means of an event algebra. The extension allows components to be triggered by complex event patterns, and not only by clock signals or single external events. Separating the detection of triggering conditions from the definition of the triggered services permits more general components and thus improves component reusability. Providing event detection mechanisms within the component model means that triggering conditions are explicitly available for system analysis at design time. An event algebra is used to define the complex triggering conditions. This algebra has a relatively simple declarative semantics and well documented algebraic properties, which facilitates formal and informal reasoning about the system. The algebra also ensures that detection of triggering conditions can be efficiently implemented with limited resources, which is critical in embedded applications.