Should return true if the end-of-life transaction txn should commit,
false if it should roll back.
Should return true if the end-of-life transaction txn should commit,
false if it should roll back. Txn.rollback may also be used to
initiate a rollback if that is more convenient. Called while the
status is Prepared. This method may not access any Refs, even via
Ref.single.
An
ExternalDecideris given the final control over the decision of whether or not to commit a transaction, which allows two-phase commit to be integrated with a single non-transactional resource.shouldCommitwill only be called if aInTxnhas successfully called all of its before-commit handlers, acquired all necessary write locks, validated all of its reads and called all of its while-preparing handlers. The decider may then attempt a non-transactional operation whose outcome is uncertain, and based on the outcome may directly cause the transaction to commit or roll back.