private int execute(Prepared p) {
beginTransaction(p);
boolean isTopTransaction = false;
boolean isNestedTransaction = false;
Session session = p.getSession();
try {
if (!p.isLocal() && p.isBatch()) {
if (session.isAutoCommit()) {
session.setAutoCommit(false);
isTopTransaction = true;
} else {
isNestedTransaction = true;
session.addSavepoint(TransactionCommand.INTERNAL_SAVEPOINT);
}
}
int updateCount = 0;
switch (p.getType()) {
case CommandInterface.INSERT:
updateCount = nestedRouter.executeInsert((Insert) p);
break;
case CommandInterface.UPDATE:
updateCount = nestedRouter.executeUpdate((Update) p);
break;
case CommandInterface.DELETE:
updateCount = nestedRouter.executeDelete((Delete) p);
break;
case CommandInterface.MERGE:
updateCount = nestedRouter.executeMerge((Merge) p);
break;
}
if (isTopTransaction) session.commit(false);
return updateCount;
} catch (Exception e) {
if (isTopTransaction) session.rollback();
// 嵌套事务出错时提前rollback
if (isNestedTransaction) session.rollbackToSavepoint(TransactionCommand.INTERNAL_SAVEPOINT);
throw DbException.convert(e);
} finally {
if (isTopTransaction) session.setAutoCommit(true);
}
}
