io.shardingjdbc.transaction.tcc.TCCWorkflow Maven / Gradle / Ivy
/*
* Copyright 1999-2015 dangdang.com.
*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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 io.shardingjdbc.transaction.tcc;
/**
* TCC workflow.
*
* @author zhangliang
*/
public enum TCCWorkflow {
/**
* Try to execute business task.
*
* 完成所有业务检查（一致性）
* 预留必须业务资源（准隔离性）
*/
Try,
/**
* Confirm to execute business task.
*
* 真正执行业务
* 不作任何业务检查
* 只使用Try阶段预留的业务资源
* Confirm操作满足幂等性
*/
Confirm,
/**
* Cancel to execute business task.
*
* 释放Try阶段预留的业务资源
* Cancel操作满足幂等性
*/
Cancel
}