International Business Machines Corporation

Jane Louise Stockdill

Andrew Ian Hickson

Andrew James Stanford-Clark

David Locke

Ian Gerald Craggs

Andrew David Reynolds

Anthony Alan Garrard

Ian Robert Harwood

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.

Event-based activation and deactivation of subscription matching

Growing community of inventors

Southampton, United Kingdom

Jane Louise Stockdill