January 2019
Beginner to intermediate
352 pages
8h
English
Content preview from Hands-On Cloud-Native Microservices with Jakarta EE
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2PC protocol
2PC is the most commonly used consensus algorithm. In this scenario, the global transaction manager contacts every participant, suggests a possible value, collects a response from every participant, and, if everyone agrees, decides on a commit; otherwise, it communicates to abort about the consensus and performs a rollback on the transaction.
The procedure consists of two phases, as follows:
- The prepare phase: All participants send their proposals to the coordinator, stating whether they are able to proceed and commit their single operation, or whether the transaction should be aborted. This phase is implemented by the prepare() method of the javax.transaction.xa.XAResource interface.
- Commit or abort phase: All participants ...
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