Using process pairs as transaction-coordinated resource managers
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United States of America Patent
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Aug 15, 2000
Grant Date -
N/A
app pub date -
Apr 16, 1997
filing date -
Apr 16, 1997
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Abstract
The present invention is a process-pair resource manager for use in a transaction processing system. The process-pair resource manager includes a concurrent aspect and a serial aspect. The concurrent aspect provides an object-like interface to a protected resource. An application program participating in a transaction accesses the protected resource by passing messages to the concurrent aspect. The concurrent aspect adds a description of each message as well as the result of processing each message to a transaction record. At the conclusion of a transaction, the concurrent aspect passes the transaction record to the serial aspect. The serial aspect then replays the transaction, using the transaction record. If the replay of the transaction is consistent with the transaction as recorded in the transaction record, the serial aspect sends a message to the concurrent aspect voting to commit the transaction. In turn, the concurrent aspect sends a message to the transaction manager forwarding the commit message.
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