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Methods, systems and computer program products for differencing data communications using a message queue

  • US 6,279,041 B1
  • Filed: 11/13/1998
  • Issued: 08/21/2001
  • Est. Priority Date: 11/13/1998
  • Status: Expired due to Fees
First Claim
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1. A method for differencing data communications using a message queue, the method comprising the steps of:

  • intercepting a data stream having an associated type from a host application prior to transmission of the data stream through the message queue on an external communication link to a destination computer;

    segmenting the data stream based on the associated type to provide a plurality of segments;

    placing message identifiers associated with the plurality of segments into the message queue;

    selecting one of the plurality of segments from the message queue for transport;

    determining if the selected segment has previously been transported;

    reducing the selected segment to a differenced communication format based upon whether it has previously been transported to provide a reduced segment;

    emitting the reduced segment;

    verifying that the differenced communication format of the reduced segment is known to the destination computer;

    dequeuing the selected segment; and

    placing the selected segment in a differencing cache if it has not previously been transported.

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