Event specification in an active object-oriented database

Gehani, Narain; Jagadish, H. V.; Shmueli, Oded

doi:10.1145/130283.130300

Cited by 153 publications

(42 citation statements)

References 9 publications

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“…Much work has been done in active database systems on composite event detection [7,14,15], and a comprehensive study of the semantics of composite events can be found in [24]. Among the work, basic methods such as tree-based approach [7], Petri Nets model [14] and finite automata [15] have been proposed.…”

Section: Related Workmentioning

confidence: 99%

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Spatio-temporal Event Stream Processing in Multimedia Communication Systems

Gao

Yang

Jain

et al. 2010

Lecture Notes in Computer Science

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Emerging multimedia communication environments, such as Environment-to-Environment (E2E) systems, require detecting complex events in environments using multimodal sensory data. Based on these spatio-temporal events, systems select and send data from appropriate sensors. Most existing stream processing systems consider temporal streams of alpha-numeric data and provide efficient approach to deal with queries in these environments. In cases where events are detected in different sensory data types, including audio and video collected at different locations, new approaches need to be developed to represent, combine, and process events to answer queries. In this paper, we present our approach in managing event stream processing to address the needs of a real time E2E system being developed in our laboratory. We introduce the modeling of our problem, and describe in detail the filtering and matching algorithms for querying spatio-temporal event stream. Experimental results demonstrate the efficacy and efficiency of our approach.

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Section: Related Workmentioning

confidence: 99%

“…Among the work, basic methods such as tree-based approach [7], Petri Nets model [14] and finite automata [15] have been proposed. But, as noted in [19], arbitrary tree plans in Snoop [7] may suffer from poor performance; Petri Nets are too complicated to put into practice use; and concurrent relationships are not supported in Ode [15].…”

Section: Related Workmentioning

confidence: 99%

Spatio-temporal Event Stream Processing in Multimedia Communication Systems

Gao

Yang

Jain

et al. 2010

Lecture Notes in Computer Science

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“…In the Ode object database [6], composite events are specified with a regularexpression-like language and detected using finite state automata (FSA). Equivalence between the CE language and regular expressions is shown.…”

Section: Related Workmentioning

confidence: 99%

A Framework for Event Composition in Distributed Systems

Pietzuch

Shand

Bacon

2003

Lecture Notes in Computer Science

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Abstract. For large-scale distributed applications such as internet-wide or ubiquitous systems, event-based communication is an effective messaging mechanism between components. In order to handle the large volume of events in such systems, composite event detection enables application components to express interest in the occurrence of complex patterns of events. In this paper, we introduce a general composite event detection framework that can be added on top of existing middleware architectures -as demonstrated in our implementation over JMS. We argue that the framework is flexible, expressive, and easy to implement. Based on finite state automata extended with a rich time model and support for parameterisation, it provides a decomposable core language for composite event specification, so that composite event detection can be distributed throughout the system. We discuss the issues associated with automatic distribution of composite event expressions. Finally, tests of our composite event system over JMS show reduced bandwidth consumption and a low notification delay for composite events.

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“…The event based paradigm has gathered momentum as witnessed by current efforts in areas including event driven architectures, complex event processing, business process management and modeling, grid computing, web services notifications, event stream processing, and message-oriented middleware [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][21][22][23][24][25][26]. The increasing popularity of event based systems has opened new challenging issues for event based systems.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for Deriving Test Scenarios and Test Cases from Events

Singh¹,

Sabharwal²,

Gupta³

2012

Journal of Information Processing Systems

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Abstract-Safety critical systems, real time systems, and event-based systems have a complex set of events and their own interdependency, which makes them difficult to test ma Safety critic Safety critical systems, real time systems, and event-based systems have a complex set of events and their own interdependency, which makes them difficult to test manually. In order to cut down on costs, save time, and increase reliability, the model based testing approach is the best solution. Such an approach does not require applications or codes prior to generating test cases, so it leads to the early detection of faults, which helps in reducing the development time. Several model-based testing approaches have used different UML models but very few works have been reported to show the generation of test cases that use events. Test cases that use events are an apt choice for these types of systems. However, these works have considered events that happen at a user interface level in a system while other events that happen in a system are not considered. Such works have limited applications in testing the GUI of a system. In this paper, a novel model-based testing approach is presented using business events, state events, and control events that have been captured directly from requirement specifications. The proposed approach documents events in event templates and then builds an event-flow model and a fault model for a system. Test coverage criterion and an algorithm are designed using these models to generate event sequence based test scenarios and test cases. Unlike other event based approaches, our approach is able to detect the proposed faults in a system. A prototype tool is developed to automate and evaluate the applicability of the entire process. Results have shown that the proposed approach and supportive tool is able to successfully derive test scenarios and test cases from the requirement specifications of safety critical systems, real time systems, and event based systems

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Event specification in an active object-oriented database

Cited by 153 publications

References 9 publications

Spatio-temporal Event Stream Processing in Multimedia Communication Systems

Spatio-temporal Event Stream Processing in Multimedia Communication Systems

A Framework for Event Composition in Distributed Systems

A Novel Approach for Deriving Test Scenarios and Test Cases from Events

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