The EDC TransactionContext will add the ability to register transaction synchronizations to receive callbacks prior to when a transaction is committed or rolled back.
Transaction synchronization is a well-established pattern (.cf JTA) and will be used to automatically close resources and reduce the risk of runtime resource leaks. For example,
SqlQueryExecutor will use a transaction synchronization to close JDBC resources associated with streams returned from the executeQuery method:
public static <T> Stream<T> executeQuery(Connection connection, boolean closeConnection, ResultSetMapper<T> resultSetMapper, String sql, Object... arguments)
Synchronizations must implement the TransactionSynchronization interface:
@FunctionalInterface interface TransactionSynchronization { void beforeCompletion(); }
Transaction synchronizations are registered using the registerSynchronization method on TransactionContext and will be associated with the active transaction context associated
with the current thread:
void registerSynchronization(TransactionSynchronization sync);
Transaction synchronizations must only be registered when a transaction is active and will be cleared after the transaction commits or is rolled back. Transaction synchronizations
will be supported across all TransactionContext implementations.