useTransaction
inline fun <T> useTransaction(isolation: TransactionIsolation? = null, func: (Transaction) -> T): T(source)
Execute the specific callback function in a transaction and returns its result if the execution succeeds, otherwise, if the execution fails, the transaction will be rollback.
Note:
Any exceptions thrown in the callback function can trigger a rollback.
This function is reentrant, so it can be called nested. However, the inner calls don’t open new transactions but share the same ones with outers.
Since version 3.3.0, the default isolation has changed to null (stands for the default isolation level of the underlying datastore), not TransactionIsolation.REPEATABLE_READ anymore.
Return
the result of the callback function.
Parameters
isolation
transaction isolation, null for the default isolation level of the underlying datastore.
func
the executed callback function.
