Abstract: A computer implemented method for providing feedback to a publisher, comprising: responsive to receiving a published message from the publisher comprising an option requesting feedback, comparing the message with subscriber data; and responsive to the publish operation and responsive to determining a matching subscriber associated with the published message, selecting a notification for transmission to the publisher.

Abstract: An apparatus for providing feedback to a publisher, comprising: means, responsive to receiving a published message from the publisher comprising an option requesting feedback, for comparing the message with subscriber data; and means, responsive to the publish operation and responsive to determining a matching subscriber associated with the published message, for selecting a notification for transmission to the publisher.

Abstract: Messages in a publish/subscribe system can be processed after they leave the original publisher and before they are delivered to an ultimate subscriber. Each published message has an associated topic string and a PubLevel value initially assigned by the original publisher. Subscribers are assigned different SubLevel values. These subscribers register their subscriptions with a broker. When a published message having the appropriate topic string is received, the broker performs a subscriber selection process using the message topic string, the current message PubLevel value and the assigned SubLevel values of subscribers registered for the topic string. When a subscriber is selected, the broker changes the message PubLevel value and transmits the message only to the selected subscriber. The subscriber may be an intercepting subscriber that processes the published message and then re-publishes it back to the broker.

Abstract: Messages in a publish/subscribe system can be processed after they leave the original publisher and before they are delivered to an ultimate subscriber. Each published message has an associated topic string and a PubLevel value initially assigned by the original publisher. Subscribers are assigned different SubLevel values. These subscribers register their subscriptions with a broker. When a published message having the appropriate topic string is received, the broker performs a subscriber selection process using the message topic string, the current message PubLevel value and the assigned SubLevel values of subscribers registered for the topic string. When a subscriber is selected, the broker changes the message PubLevel value and transmits the message only to the selected subscriber. The subscriber may be an intercepting subscriber that processes the published message and then re-publishes it back to the broker.