DbTxn beginTransaction(final DbEnv dbenv, final DbTxn parent) throws DatabaseException {
int flags = 0;
flags |= readCommitted ? DbConstants.DB_READ_COMMITTED : 0;
flags |= readUncommitted ? DbConstants.DB_READ_UNCOMMITTED : 0;
flags |= noSync ? DbConstants.DB_TXN_NOSYNC : 0;
flags |= noWait ? DbConstants.DB_TXN_NOWAIT : 0;
flags |= snapshot ? DbConstants.DB_TXN_SNAPSHOT : 0;
flags |= sync ? DbConstants.DB_TXN_SYNC : 0;
flags |= wait ? DbConstants.DB_TXN_WAIT : 0;
flags |= writeNoSync ? DbConstants.DB_TXN_WRITE_NOSYNC : 0;
return dbenv.txn_begin(parent, flags);
}
