Refresh Your Java - Before Java Interview
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A nested transaction is used to provide the
transactional guarantee for a subset of operations that
performed in a larger transaction, this would allow you to comitt
or abort the subset of operations
independently of the
larger transaction.
Committing a nested
transaction has
no effect on the state of the parent transaction. The
parent
transaction is still uncommitted. However, the
parent transaction can now see any modifications made
by
the child transaction. Those modifications, of course, are still
hidden to all other transactions
until the parent also
commits.
// parent transaction
Transaction parentTxn = myEnv.beginTransaction(null,
null);
// child transaction
Transaction
childTxn = myEnv.beginTransaction(parentTxn, null);
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