Event-based activation and deactivation of subscription...

Details Event-based activation and deactivation of subscription... Event-based activation and deactivation of subscription...

2007-11-30

2011-12-20

Ho, Andy (Department: 2194)

Electrical computers and digital processing systems: interprogra

Event handling or event notification

C719S313000

Reexamination Certificate

active

08082554

ABSTRACT:
The present invention provides methods, apparatus and computer programs for event-based control of subscription matching in a publish/subscribe communications environment. Activation and/or deactivation events are associated with subscriptions at a publish/subscribe broker and are used to control when a subscription is active. The broker is responsive to temporally-unpredictable events, such as receipt of a published message on a predefined activation topic, to activate subscription matching for messages that are subsequently received or which have been received earlier and retained at the broker. Conventional subscription matching can be avoided for a registered subscription while that subscription is inactive, and subscribers are not required to explicitly and repeatedly subscribe and unsubscribe.

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Wang, et al., “Adaptive Real-Time Publish-Subscribe Messaging for Distributed Monitoring Systems”, IEEE International Workshop on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications, pp. 412-417 (Ukraine, Sep. 8-10, 2003).
Wang, et al., “Adaptive Real-Time Publish-Subscribe Service Model for Mobile Communications Environments,” Proceedings 2003 International Conference on Computer Networks and Mobile Computing (ICCNMC'03).

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