JUST-IN-TIME PUBLISHING SYSTEM AND PROGRAM PRODUCT FOR A PUBLISH/SUBSCRIBE MESSAGING SYSTEM USING A SUBSCRIBE-EVENT MODEL

• US 20090182742A1
• Filed: 07/11/2008
• Published: 07/16/2009
• Est. Priority Date: 12/01/2004
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Meulen, Michael Van Der, Stewart, Eben P., Stoken, Matthew
• Granted Patent: US 7,890,489 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 16/335 Filtering based on additional data, e.g. user or group profiles filtering in web context G06F16/9535, G06F16/9536
• CPC Class Codes: Y10S 707/99933 Query processing, i.e. searching
• CPC Class Codes: Y10S 707/99936 Pattern matching access
• CPC Class Codes: Y10S 707/99939 Privileged access
• CPC Class Codes: Y10S 707/99943 Generating database or data structure, e.g. via user interface

Abstract

A system, and program product having at least one subscriber subscribing to topics from one or more data sources. The data sources available and the number of subscriptions for each data source are registered in a table in real time. Upon detecting either subscription activity by the subscribers or availability of data on a data source, a matching routine compares the subscriptions registered for the available data source and enables the sending of messages from the available data source to subscriber/s.

Claims

1. In a publish/subscribe system having one or more subscribers subscribing to data from one or more data sources, a just-in-time messaging system comprising:

a subscription table in which is recorded in real time, subscription requests from subscribers, said subscription requests including specific data sources to be subscribed to, said subscription table storing statistics of the subscriptions topics and the categorization and specifics of the data being requested including a system prefix, subtopic of the data type, specific news forum served, and specific forum to be listened to, a subscriber subscribing to a topic by said publish/subscribe system;

a data source table in which is recorded in real time, data sources for providing data to subscribers;

a matching routine connected to said subscription table and said data source table for comparing data source subscription requests in the subscription table with data sources of the data source table as said data sources become available and without further input from said subscribers, said matching routine matching subscription requests by said statistics for the subscriptions topics and categorization and specifics with currently available and active data sources;

a real-time enabling routine responsive to said matching routine for enabling or disabling message transmissions from a subscribed to data source recorded in said data source table to a subscriber having a subscription for said subscribed to data source in said subscription table through a publish/subscribe engine; and

a search routine searching with said matching routine for matches, immediately after the updating of either of said user subscription table of said data source table.

2. The publish/subscribe system according to claim 1 further comprising a subscription monitor for recording subscriptions from said subscribers into said subscription table.

3. The publish/subscribe system according to claim 1 further comprising a data source registry for recording available data sources into said data source table.

4. The publish/subscribe system according to claim 3 further comprising a data source provider associated with each data source and connected to said data source registry, each data source provider for reporting to said data source registry when its associated data source has data available.

5. The publish/subscribe system according to claim 4 wherein each of said data source providers controls messages from its associated data source to subscribers and is responsive to said matching routine for sending messages when said matching routine finds a match.

6. The publish/subscribe system according to claim 1 wherein said subscription monitor updates said subscription table immediately upon a subscription being received from a subscriber.

7. The publish/subscribe system according to claim 6 wherein said data source registry updates said data source table immediately upon a data source becoming available or unavailable for sending messages.

8. The publish/subscribe system according to claim 1 wherein said data sources includes one of a forum, a web feed, a webpage, a public database or a server log.

9. A computer program product for use in a publish/subscribe system having one or more subscribers subscribing to data from one or more data sources, a computer program product comprising a computer readable media having recorded therein computer readable program code for executing a method for just-in-time messaging comprising the steps of:

recording in real time in a subscription table, subscription requests from subscribers, said subscription requests including specific data sources to be subscribed to, said subscription table storing statistics of the subscriptions topics and the categorization and specifics of the data being requested including a system prefix, subtopic of the data type, specific news forum served, and specific forum to be listened to, a subscriber subscribing to a topic;

recording in real time in a data source table, data sources for providing data to subscribers;

comparing with a matching routine connected to said subscription table and said data source table, data source subscription requests in the subscription table with data sources of the data source table as said data sources become available and without further input from said subscribers, said matching routine matching subscription requests by said statistics for the subscriptions topics and categorization and specifics with currently available and active data sources;

in real time and responsive to said matching routine comparing step, one of enabling or disabling message transmissions from a subscribed to data source recorded in said data source table to a subscriber having a subscription for said subscribed to data source in said subscription table through a publish/subscribe engine; and

searching with said matching routine for matches, immediately after the updating of either of said user subscription table or said data source table.

10. The computer program product according to claim 9 wherein said method further comprises recording with a subscription monitor, subscriptions from said subscribers into said subscription table.

11. The computer program product according to claim 9 wherein said method further comprises recording with a data source registry, available data sources into said data source table.

12. The computer program product according to claim 11 wherein said method further comprises recording:

associating a data source provider with each data source; and

notifying said data source registry by said data source provider, when the respective data source associated with a data source provider has data available.

13. The computer program product according to claim 12 wherein said method further comprises controlling with each of said data source providers, messages from the respective associated data source to subscribers responsive to said matching routine thereby sending messages from a subscribed to data source to a subscriber when said matching routine finds a match.

14. The computer program product according to claim 9 wherein said method further comprises updating said subscription table with a subscription monitor immediately upon a subscription being received from a subscriber.

15. The computer program product according to claim 14 wherein said data source registry updates said data source table immediately upon a data source becoming available or unavailable for sending messages.

16. The computer program product according to claim 9 wherein said data sources includes one of a forum, a web feed, a webpage, a public database or a server log.