Transactions

Unit-of-work transactions are now documented as a shared Chronicle workflow with synchronized Kotlin and Java examples.

• Transactions and unit of work
• Appending many events
• Kotlin and Java client setup

Kotlin client: IUnitOfWork

Beyond commit/rollback, IUnitOfWork (from store.unitOfWorkManager) exposes the outcome of a commit:

Member	Use it for
isSuccess	Whether every staged event committed cleanly.
getConstraintViolations	Constraint violations detected on commit.
getConcurrencyViolations	Concurrency violations detected on commit.
getAppendErrors	Append errors detected on commit.
tryGetLastCommittedEventSequenceNumber	Highest sequence committed.
onCompleted	A callback invoked once commit or rollback completes.

See the EventStore API reference for the full IUnitOfWork/IUnitOfWorkManager interfaces.

val unitOfWork = store.unitOfWorkManager.begin()
unitOfWork.onCompleted { completed ->
    println("Unit of work ${completed.correlationId} completed")
}