/**
* Returns the current Transaction instance
*
* @return Transaction
* @throws DatabaseException
*/
public Transaction getTransaction() throws DatabaseException {
if (transaction == null || !transaction.isValid()) {
transaction = new JDBCTransaction(createConnection());
if (transaction == null || !transaction.isValid()) {
throw new DatabaseException("Connection Failed!");
}
}
return transaction;
}
/** 重载父类方法，设置事务的状态标识为回滚状态 */
public void rollback() throws SQLException {
JDBCTransaction tx = TransactionManager.getTransaction();
try {
if (tx != null) tx.setRollbackOnly();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SystemException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}