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Copyright (c) 2011-2013, James Zhan 詹波 ( Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
package com.jfinal.plugin.activerecord;
IAtom support transaction of database. It can be invoked in Db.tx(IAtom atom) method.
Db.tx(new IAtom(){
public boolean run() throws SQLException {
int result1 = Db.update("update account set cash = cash - ? where id = ?", 100, 123);
int result2 = Db.update("update account set cash = cash + ? where id = ?", 100, 456);
return result1 == 1 && result2 == 1;
public interface IAtom {

Place codes here that need transaction support.

true if you want to commit the transaction otherwise roll back transaction
	boolean run() throws SQLException;
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