if (TransactionUnitHelper.isTransactionUnitInProgress(pageContext,"purProgCreateTxn",false)) {
am.rollbackPurProgram();
TransactionUnitHelper.endTransactionUnit(pageContext,"purProgCreateTxn");
}
else if (TransactionUnitHelper.isTransactionUnitInProgress(pageContext,"purProgUpdateTxn",false)) {
am.rollbackPurProgram();
TransactionUnitHelper.endTransactionUnit(pageContext,"purProgUpdateTxn");
}
OAF_开发系列21_实现OAF事物控制TransactionUnitHelper
原文：http://www.cnblogs.com/eastsea/p/4645444.html