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Reliable messaging using clocks with synchronized rates

  • US 20060064464A1
  • Filed: 09/21/2004
  • Published: 03/23/2006
  • Est. Priority Date: 09/21/2004
  • Status: Active Grant
First Claim
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1. At a destination computer system that is network connectable along with one or more other computer systems to a network, the destination computer system and at least one of the other computer systems having synchronized clock rates, a method for reliably processing a message, the method comprising:

  • an act of receiving a first copy of a message having a message ID and a TTL value, the message ID identifying the position of the message in an interaction between a message source and the destination computer system, the TTL value indicating when the message is to expire;

    an act of updating an interaction cache to indicate that the message has been received;

    an act of receiving a second copy of the message subsequent to processing the first copy of the message, the second copy of the message having the message ID; and

    an act of discarding the second copy of the message based on the interaction cache indicating that a message having the message ID was previously processed.

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