Snoop: an expressive event specification language for active databases
Data & Knowledge Engineering
Time, clocks, and the ordering of events in a distributed system
Communications of the ACM
Composite Events for Active Databases: Semantics, Contexts and Detection
VLDB '94 Proceedings of the 20th International Conference on Very Large Data Bases
Engineering Event-Based Systems with Scopes
ECOOP '02 Proceedings of the 16th European Conference on Object-Oriented Programming
Hermes: A Distributed Event-Based Middleware Architecture
ICDCSW '02 Proceedings of the 22nd International Conference on Distributed Computing Systems
The nesC language: A holistic approach to networked embedded systems
PLDI '03 Proceedings of the ACM SIGPLAN 2003 conference on Programming language design and implementation
Modern concurrency abstractions for C#
ACM Transactions on Programming Languages and Systems (TOPLAS)
Distributed Event-Based Systems
Distributed Event-Based Systems
Type-based publish/subscribe: Concepts and experiences
ACM Transactions on Programming Languages and Systems (TOPLAS)
Specialization of CML message-passing primitives
Proceedings of the 34th annual ACM SIGPLAN-SIGACT symposium on Principles of programming languages
Actors that unify threads and events
COORDINATION'07 Proceedings of the 9th international conference on Coordination models and languages
Polyglot: an extensible compiler framework for Java
CC'03 Proceedings of the 12th international conference on Compiler construction
Implementing joins using extensible pattern matching
COORDINATION'08 Proceedings of the 10th international conference on Coordination models and languages
The essence of data access in Cω: the power is in the dot!
ECOOP'05 Proceedings of the 19th European conference on Object-Oriented Programming
Responders: language support for interactive applications
ECOOP'06 Proceedings of the 20th European conference on Object-Oriented Programming
Designing event-based context transition in context-oriented programming
Proceedings of the 2nd International Workshop on Context-Oriented Programming
Putting events in context: aspects for event-based distributed programming
Proceedings of the tenth international conference on Aspect-oriented software development
Abstracting context in event-based software
Transactions on Aspect-Oriented Software Development IX
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Recent research on Distributed Event-based Systems (DEBS) has focussed on event correlation, which is the task of processing events to identify meaningful patterns of events in the event cloud. In DEBS, software components communicate by generating, disseminating and receiving event notifications, which reify and describe the event. Several parts of an event notification are context-sensitive, depending on where the software component producing the event is deployed, the communication infrastructure available for event dissemination etc. Event contexts may be added during the production of an event (e.g. by the runtime system executing the component) or during dissemination (by a middleware) and play an integral part in event correlation. Examples of contextual information include physical time, logical time, geographical coordinates, information about the source of events, digital signatures, etc. EventJava [7], an extension of Java with advanced support for event correlation, explicitly integrates the notion of event context, thereby allowing a programmer to customize the way in which events are ordered, propagated and correlated with other events. In this paper, we explain why contexts are indispensable to DEBS, present an overview of EventJava and illustrate the use of contexts through programming examples.