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Method to Inform a Remote User of the Existence of Updated Information

IP.com Disclosure Number: IPCOM000108397D
Original Publication Date: 1992-May-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 1 page(s) / 37K

Publishing Venue

IBM

Related People

Titizer, PR: AUTHOR

Abstract

When status at a server machine changes, remote users need to be notified of the change. In this scenario, two-way communication between a user and a server is not available.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Method to Inform a Remote User of the Existence of Updated Information

      When status at a server machine changes, remote users need to
be notified of the change.  In this scenario, two-way communication
between a user and a server is not available.

      To solve the notification problem, a table is kept by the
server program.  It has entries for the most recent users, along with
a timestamp for the last time that user received updated status or
was informed about the availability of updated status.  Additionally,
a global timestamp is kept for the time of the last status update.

      When a user makes a request, the type of request is evaluated.
If the request is for new status, the user's entry in the table is
updated with the current time.  If the request is not for new status,
a comparison is made between his previous timestamp and the global
timestamp.  If the comparison indicates that the status has changed,
a special indicator is returned to the user and his timestamp is
updated.

      At the user's workstation, the program detects the special
indicator and displays a message to the user.  The message allows the
user to request new status.  The request for new status is then sent
to the server.

      Anonymous.