Message ordering in a messaging system

Details Message ordering in a messaging system Message ordering in a messaging system

2002-12-13

2009-08-25

Flynn, Nathan J (Department: 2454)

Electrical computers and digital processing systems: multicomput

Computer conferencing

Demand based messaging

C709S204000, C709S207000

Reexamination Certificate

active

07580979

ABSTRACT:
A messaging handling system implements the well-known Two-Phase Commit protocol (comprising prepare and commit operations) to store messages related to transactions in a repository, but enforces message ordering. The commit operation is divided into two phases: a commit phase and a release phase. Prepare requests are implemented conventionally. Commit requests are implemented by immediately executing the commit phase of the operation, but delaying release of the message for reading from the repository until all prepare requests received prior to an instant request have released. In this manner, message ordering is preserved, while allowing use of conventional two-phase commit protocol processing.

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