TCCWorkflow.java

/*
 * Copyright 1999-2015 dangdang.com.
 * <p>
 * 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.
 * </p>
 */

package com.dangdang.ddframe.rdb.transaction.soft.tcc;

/**
 * TCC工作流.
 * 
 * @author zhangliang 
 */
public enum TCCWorkflow {

    /**
     * 尝试执行业务.
     * 
     * <p>完成所有业务检查（一致性）</p>
     * <p>预留必须业务资源（准隔离性）</p>
     */
    Try,

    /**
     * 确认执行业务.
     * 
     * <p>真正执行业务</p>
     * <p>不作任何业务检查</p>
     * <p>只使用Try阶段预留的业务资源</p>
     * <p>Confirm操作满足幂等性</p>
     */
    Confirm,

    /**
     * 取消执行业务.
     * 
     * <p>释放Try阶段预留的业务资源</p>
     * <p>Cancel操作满足幂等性</p>
     */
    Cancel
}