Distributed events in active database systems: Letting the genie out of the bottle

Koschel, Arne; Lockemann, Peter C.

doi:10.1016/s0169-023x(97)00054-2

Cited by 27 publications

(6 citation statements)

References 20 publications

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“…One step beyond this go approaches concerning ECA rule processing in distributed environments. In (Koschel et al, 1998) active functionality was extended into an ECA rule service for CORBAbased distributed, environments. Actually this approach is one initial step in our direction.…”

Section: Our Approachmentioning

confidence: 99%

Towards a Semantic Definition for a Cloud based Event Notification Service

Schaaf¹,

Grivas²,

Koschel³

2013

Proceedings of the 3rd International Conference on Cloud Computing and Services Science

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We propose an Activity Service as a component in cloud computing. As a particular novelty we base this Activity Service on the well-defined and proven semantics of Active Database Management Systems (ADBMS) to overcome the challenges of developing portable cloud based event processing applications. As contribution of this paper we provide the first steps of the adaption of the ADBMS semantics to the distributed and highly dynamic environment of the cloud.

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Section: Our Approachmentioning

confidence: 99%

Towards a Semantic Definition for a Cloud based Event Notification Service

Schaaf¹,

Grivas²,

Koschel³

2013

Proceedings of the 3rd International Conference on Cloud Computing and Services Science

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“…Unbundling active databases consists in decoupling the active part from active DBMSs [47]. Various projects like C 2 offein [48], FRAMBOISE [49], and NODS [50] have followed this approach. However, they did not address adequately the characteristics of distributed systems, for example, the lack of a central clock and the impossibility to establish a total order.…”

Section: (Re)active Functionalitymentioning

confidence: 99%

Event Handling for the Universal Enterprise

2005

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Current trends in the global economy are leading to inter-enterprise interactions and to new business models that depend on the timely notification of events and the reaction to them. In this paper we present a distributed reactive middleware that supports the proactive notification of events in heterogeneous environments. The infrastructure consists of a publish/subscribe notification mechanism and a reactive functionality. We represent events that may originate from heterogeneous sources together with their ontology-based context metadata to make them self-describing beyond the boundaries of the event source. We introduce the notion of concept-based addressing to publish/subscribe systems. Concept-based addressing allows us to express subscriptions to events according to different contexts than those of the published events and yet match them successfully. By using ontologies and context definitions consistently for events, notifications, subscriptions and reactions we provide the necessary support for event handling in global enterprises.

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“…Active rules currently exist in commercial database systems in the form of triggers [16]. More recently, active rules have proven useful for controlling activities in centralized and distributed workflow systems [17,18,19,20,21] and for supporting event-based, application integration in distributed environments [22,23,24,25,26]. Our own research has investigated the use of active rules, known as Integration Rules (IRules), for developing a declarative event-based approach to component integration [27,28,29,30].…”

Section: Introductionmentioning

confidence: 99%

A concurrent rule scheduling algorithm for active rules

Jin

Urban

Dietrich

2007

Data & Knowledge Engineering

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The use of rules in a distributed environment creates new challenges for the development of active rule execution models. In particular, since a single event can trigger multiple rules that execute over distributed sources of data, it is important to make use of concurrent rule execution whenever possible. This paper presents the details of the Integration Rule Scheduling (IRS) algorithm. Integration rules are active database rules that are used for component integration in a distributed environment. The IRS algorithm identifies rule conflicts for multiple rules triggered by the same event by analyzing the read and write sets of each rule. A unique aspect of the algorithm is that the conflict analysis includes the effects of nested rule execution that occurs as a result of using an execution model with an immediate coupling mode. The algorithm therefore identifies conflicts that may occur as a result of the concurrent execution of different rule triggering sequences. The rules are then formed into a priority graph, defining the order in which rules triggered by the same event should be processed. Rules with the same priority can be executed concurrently. The IRS algorithm guarantees confluence in the final state of the rule execution. The IRS algorithm is applicable for rule scheduling in both distributed and centralized rule execution environments.

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Distributed events in active database systems: Letting the genie out of the bottle

Cited by 27 publications

References 20 publications

Towards a Semantic Definition for a Cloud based Event Notification Service

Towards a Semantic Definition for a Cloud based Event Notification Service

Event Handling for the Universal Enterprise

A concurrent rule scheduling algorithm for active rules

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