什么是TCC事务
TCC是Try、Confirm、Cancel三个词语的缩写，TCC要求每个分支事务实现三个操作：预处理Try、确认
Confirm、撤销Cancel。Try操作做业务检查及资源预留，Confirm做业务确认操作，Cancel实现一个与Try相反的
操作即回滚操作。TM首先发起所有的分支事务的try操作，任何一个分支事务的try操作执行失败，TM将会发起所
有分支事务的Cancel操作，若try操作全部成功，TM将会发起所有分支事务的Confirm操作，其中Confirm/Cancel
操作若执行失败，TM会进行重试。
分支事务失败的情况：
TCC分为三个阶段：
1. Try 阶段是做业务检查(一致性)及资源预留(隔离)，此阶段仅是一个初步操作，它和后续的Confirm 一起才能
真正构成一个完整的业务逻辑。
2. Confirm 阶段是做确认提交，Try阶段所有分支事务执行成功后开始执行 Confirm。通常情况下，采用TCC则
认为 Confirm阶段是不会出错的。即：只要Try成功，Confirm一定成功。若Confirm阶段真的出错了，需引
入重试机制或人工处理。
3. Cancel 阶段是在业务执行错误需要回滚的状态下执行分支事务的业务取消，预留资源释放。通常情况下，采
用TCC则认为Cancel阶段也是一定成功的。若Cancel阶段真的出错了，需引入重试机制或人工处理。
4. TM事务管理器
TM事务管理器可以实现为独立的服务，也可以让全局事务发起方充当TM的角色，TM独立出来是为了成为公
用组件，是为了考虑系统结构和软件复用。
TM在发起全局事务时生成全局事务记录，全局事务ID贯穿整个分布式事务调用链条，用来记录事务上下文，
追踪和记录状态，由于Confirm 和cancel失败需进行重试，因此需要实现为幂等，幂等性是指同一个操作无论请求
多少次，其结果都相同。
Hmily框架介绍
Hmily是一个高性能分布式事务TCC开源框架。基于Java语言来开发（JDK1.8），支持Dubbo，Spring Cloud等
RPC框架进行分布式事务。它目前支持以下特性：
支持嵌套事务(Nested transaction support).
采用disruptor框架进行事务日志的异步读写，与RPC框架的性能毫无差别。
支持SpringBoot-starter 项目启动，使用简单。
RPC框架支持 : dubbo,motan,springcloud。
本地事务存储支持 : redis,mongodb,zookeeper,file,mysql。
事务日志序列化支持 ：java，hessian，kryo，protostuff。
采用Aspect AOP 切面思想与Spring无缝集成，天然支持集群。
RPC事务恢复，超时异常恢复等。
Hmily利用AOP对参与分布式事务的本地方法与远程方法进行拦截处理，通过多方拦截，事务参与者能透明的
调用到另一方的Try、Confirm、Cancel方法；传递事务上下文；并记录事务日志，酌情进行补偿，重试等。
Hmily不需要事务协调服务，但需要提供一个数据库(mysql/mongodb/zookeeper/redis/file)来进行日志存
储。
Hmily实现的TCC服务与普通的服务一样，只需要暴露一个接口，也就是它的Try业务。Confirm/Cancel业务
逻辑，只是因为全局事务提交/回滚的需要才提供的，因此Confirm/Cancel业务只需要被Hmily TCC事务框架
发现即可，不需要被调用它的其他业务服务所感知。
官网介绍：https://dromara.org/website/zh-cn/docs/hmily/index.html
TCC需要注意三种异常处理分别是空回滚、幂等、悬挂:
空回滚：
在没有调用 TCC 资源 Try 方法的情况下，调用了二阶段的 Cancel 方法，Cancel 方法需要识别出这是一个空回
滚，然后直接返回成功。
出现原因是当一个分支事务所在服务宕机或网络异常，分支事务调用记录为失败，这个时候其实是没有执行Try阶
段，当故障恢复后，分布式事务进行回滚则会调用二阶段的Cancel方法，从而形成空回滚。
解决思路是关键就是要识别出这个空回滚。思路很简单就是需要知道一阶段是否执行，如果执行了，那就是正常回
滚；如果没执行，那就是空回滚。前面已经说过TM在发起全局事务时生成全局事务记录，全局事务ID贯穿整个分
布式事务调用链条。再额外增加一张分支事务记录表，其中有全局事务 ID 和分支事务 ID，第一阶段 Try 方法里会
插入一条记录，表示一阶段执行了。Cancel 接口里读取该记录，如果该记录存在，则正常回滚；如果该记录不存
在，则是空回滚。
幂等：
通过前面介绍已经了解到，为了保证TCC二阶段提交重试机制不会引发数据不一致，要求 TCC 的二阶段 Try、
Confirm 和 Cancel 接口保证幂等，这样不会重复使用或者释放资源。如果幂等控制没有做好，很有可能导致数据
不一致等严重问题。
解决思路在上述“分支事务记录”中增加执行状态，每次执行前都查询该状态。
悬挂：
悬挂就是对于一个分布式事务，其二阶段 Cancel 接口比 Try 接口先执行。
出现原因是在 RPC 调用分支事务try时，先注册分支事务，再执行RPC调用，如果此时 RPC 调用的网络发生拥堵，
通常 RPC 调用是有超时时间的，RPC 超时以后，TM就会通知RM回滚该分布式事务，可能回滚完成后，RPC 请求
才到达参与者真正执行，而一个 Try 方法预留的业务资源，只有该分布式事务才能使用，该分布式事务第一阶段预
留的业务资源就再也没有人能够处理了，对于这种情况，我们就称为悬挂，即业务资源预留后没法继续处理。
解决思路是如果二阶段执行完成，那一阶段就不能再继续执行。在执行一阶段事务时判断在该全局事务下，“分支
事务记录”表中是否已经有二阶段事务记录，如果有则不执行Try。
举例，场景为 A 转账 30 元给 B，A和B账户在不同的服务。
方案1：
账户A
try： 检查余额是否够30元 扣减30元 confirm： 空 cancel： 增加30元
账户B
try： 增加30元 confirm： 空 cancel： 减少30元
方案1说明：
1）账户A，这里的余额就是所谓的业务资源，按照前面提到的原则，在第一阶段需要检查并预留业务资源，因此，
我们在扣钱 TCC 资源的 Try 接口里先检查 A 账户余额是否足够，如果足够则扣除 30 元。 Confirm 接口表示正式
提交，由于业务资源已经在 Try 接口里扣除掉了，那么在第二阶段的 Confirm 接口里可以什么都不用做。Cancel
接口的执行表示整个事务回滚，账户A回滚则需要把 Try 接口里扣除掉的 30 元还给账户。
2）账号B，在第一阶段 Try 接口里实现给账户B加钱，Cancel 接口的执行表示整个事务回滚，账户B回滚则需要把
Try 接口里加的 30 元再减去。
方案1的问题分析：
1）如果账户A的try没有执行在cancel则就多加了30元。
2）由于try，cancel、confirm都是由单独的线程去调用，且会出现重复调用，所以都需要实现幂等。
3）账号B在try中增加30元，当try执行完成后可能会其它线程给消费了。
4）如果账户B的try没有执行在cancel则就多减了30元。
问题解决：
1）账户A的cancel方法需要判断try方法是否执行，正常执行try后方可执行cancel。
2）try，cancel、confirm方法实现幂等。
3）账号B在try方法中不允许更新账户金额，在confirm中更新账户金额。
4）账户B的cancel方法需要判断try方法是否执行，正常执行try后方可执行cancel。
优化方案：
账户A
try： try幂等校验 try悬挂处理 检查余额是否够30元 扣减30元 confirm： 空 cancel： cancel幂等校验 cancel空回滚处理 增加可用余额30元
账户B
try： 空 confirm： confirm幂等校验 正式增加30元 cancel： 空
Hmily实现TCC事务
本实例通过Hmily实现TCC分布式事务，模拟两个账户的转账交易过程。
两个账户分别在不同的银行(张三在bank1、李四在bank2)，bank1、bank2是两个微服务。交易过程是，张三给
李四转账指定金额。
上述交易步骤，要么一起成功，要么一起失败，必须是一个整体性的事务。
创建数据库
导入数据库脚本：资料sqlank1.sql、资料sqlank2.sql、已经导过不用重复导入。
创建hmily数据库，用于存储hmily框架记录的数据。
创建bank1库，并导入以下表结构和数据(包含张三账户)
DROP TABLE IF EXISTS `account_info`; CREATE TABLE `account_info` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `account_name` varchar(100) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL COMMENT '户 主姓名', `account_no` varchar(100) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL COMMENT '银行 卡号', `account_password` varchar(100) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL COMMENT '帐户密码', `account_balance` double NULL DEFAULT NULL COMMENT '帐户余额', PRIMARY KEY (`id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 5 CHARACTER SET = utf8 COLLATE = utf8_bin ROW_FORMAT = Dynamic; INSERT INTO `account_info` VALUES (2, '张三的账户', '1', '', 10000);
创建bank2库，并导入以下表结构和数据(包含李四账户)
REATE DATABASE `bank2` CHARACTER SET 'utf8' COLLATE 'utf8_general_ci'; CREATE TABLE `account_info` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `account_name` varchar(100) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL COMMENT '户 主姓名', `account_no` varchar(100) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL COMMENT '银行 卡号', `account_password` varchar(100) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL COMMENT '帐户密码', `account_balance` double NULL DEFAULT NULL COMMENT '帐户余额', PRIMARY KEY (`id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 5 CHARACTER SET = utf8 COLLATE = utf8_bin ROW_FORMAT = Dynamic; INSERT INTO `account_info` VALUES (3, '李四的账户', '2', NULL, 0);
每个数据库都创建try、confirm、cancel三张日志表：
CREATE TABLE `local_try_log` ( `tx_no` varchar(64) NOT NULL COMMENT '事务id', `create_time` datetime DEFAULT NULL, PRIMARY KEY (`tx_no`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 CREATE TABLE `local_confirm_log` ( `tx_no` varchar(64) NOT NULL COMMENT '事务id', `create_time` datetime DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8 CREATE TABLE `local_cancel_log` ( `tx_no` varchar(64) NOT NULL COMMENT '事务id', `create_time` datetime DEFAULT NULL, PRIMARY KEY (`tx_no`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8
bank1的配置
server: port: 9903 eureka: client: serviceUrl: defaultZone: http://localhost:9900/eureka/ spring: ##################### DB ##################### datasource: ds0: url: jdbc:mysql://localhost:3306/bank1?useUnicode=true username: root password: 123456 type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver initialSize: 5 minIdle: 5 maxActive: 20 maxWait: 60000 timeBetweenEvictionRunsMillis: 60000 minEvictableIdleTimeMillis: 300000 validationQuery: SELECT user() testWhileIdle: true testOnBorrow: false testOnReturn: false poolPreparedStatements: true connection-properties: druid.stat.mergeSql:true;druid.stat.slowSqlMillis:5000 org: dromara: hmily : serializer : kryo recoverDelayTime : 30 retryMax : 30 scheduledDelay : 30 scheduledThreadMax : 10 repositorySupport : db started: true hmilyDbConfig : driverClassName : com.mysql.jdbc.Driver url : jdbc:mysql://localhost:3306/hmily?useUnicode=true username : root password : 123456 logging: level: root: info org.springframework.web: info org.apache.ibatis: info org.dromara.hmily.bonuspoint: debug org.dromara.hmily.lottery: debug org.dromara.hmily: debug io.netty: info com.topcheer.hmily: debug
配置类
@Configuration @EnableAspectJAutoProxy(proxyTargetClass=true) public class DatabaseConfiguration { private final ApplicationContext applicationContext; @Autowired private Environment env; public DatabaseConfiguration(ApplicationContext applicationContext) { this.applicationContext = applicationContext; } @Bean @ConfigurationProperties(prefix = "spring.datasource.ds0") public DruidDataSource ds0() { DruidDataSource druidDataSource = new DruidDataSource(); return druidDataSource; } @Bean public HmilyTransactionBootstrap hmilyTransactionBootstrap(HmilyInitService hmilyInitService){ HmilyTransactionBootstrap hmilyTransactionBootstrap = new HmilyTransactionBootstrap(hmilyInitService); hmilyTransactionBootstrap.setSerializer(env.getProperty("org.dromara.hmily.serializer")); hmilyTransactionBootstrap.setRecoverDelayTime(Integer.parseInt(env.getProperty("org.dromara.hmily.recoverDelayTime"))); hmilyTransactionBootstrap.setRetryMax(Integer.parseInt(env.getProperty("org.dromara.hmily.retryMax"))); hmilyTransactionBootstrap.setScheduledDelay(Integer.parseInt(env.getProperty("org.dromara.hmily.scheduledDelay"))); hmilyTransactionBootstrap.setScheduledThreadMax(Integer.parseInt(env.getProperty("org.dromara.hmily.scheduledThreadMax"))); hmilyTransactionBootstrap.setRepositorySupport(env.getProperty("org.dromara.hmily.repositorySupport")); hmilyTransactionBootstrap.setStarted(Boolean.parseBoolean(env.getProperty("org.dromara.hmily.started"))); HmilyDbConfig hmilyDbConfig = new HmilyDbConfig(); hmilyDbConfig.setDriverClassName(env.getProperty("org.dromara.hmily.hmilyDbConfig.driverClassName")); hmilyDbConfig.setUrl(env.getProperty("org.dromara.hmily.hmilyDbConfig.url")); hmilyDbConfig.setUsername(env.getProperty("org.dromara.hmily.hmilyDbConfig.username")); hmilyDbConfig.setPassword(env.getProperty("org.dromara.hmily.hmilyDbConfig.password")); hmilyTransactionBootstrap.setHmilyDbConfig(hmilyDbConfig); return hmilyTransactionBootstrap; } /*@Bean @ConfigurationProperties(prefix = "org.dromara.hmily") public HmilyConfig hmilyConfig(){ return new HmilyConfig(); } @Bean public HmilyTransactionBootstrap hmilyTransactionBootstrap(HmilyInitService hmilyInitService, HmilyConfig hmilyConfig){ HmilyTransactionBootstrap hmilyTransactionBootstrap = new HmilyTransactionBootstrap(hmilyInitService); return hmilyTransactionBootstrap; }*/ }
Dao层
@Mapper @Component public interface AccountInfoDao { @Update("update account_info set account_balance=account_balance - #{amount} where account_balance>=#{amount} and account_no=#{accountNo} ") int subtractAccountBalance(@Param("accountNo") String accountNo, @Param("amount") Double amount); @Update("update account_info set account_balance=account_balance + #{amount} where account_no=#{accountNo} ") int addAccountBalance(@Param("accountNo") String accountNo, @Param("amount") Double amount); /** * 增加某分支事务try执行记录 * @param localTradeNo 本地事务编号 * @return */ @Insert("insert into local_try_log values(#{txNo},now());") int addTry(String localTradeNo); @Insert("insert into local_confirm_log values(#{txNo},now());") int addConfirm(String localTradeNo); @Insert("insert into local_cancel_log values(#{txNo},now());") int addCancel(String localTradeNo); /** * 查询分支事务try是否已执行 * @param localTradeNo 本地事务编号 * @return */ @Select("select count(1) from local_try_log where tx_no = #{txNo} ") int isExistTry(String localTradeNo); /** * 查询分支事务confirm是否已执行 * @param localTradeNo 本地事务编号 * @return */ @Select("select count(1) from local_confirm_log where tx_no = #{txNo} ") int isExistConfirm(String localTradeNo); /** * 查询分支事务cancel是否已执行 * @param localTradeNo 本地事务编号 * @return */ @Select("select count(1) from local_cancel_log where tx_no = #{txNo} ") int isExistCancel(String localTradeNo); }
Service层
@Service @Slf4j public class AccountInfoServiceImpl implements AccountInfoService { @Autowired AccountInfoDao accountInfoDao; @Autowired Bank2Client bank2Client; // 账户扣款，就是tcc的try方法 /** * try幂等校验 * try悬挂处理 * 检查余额是够扣减金额 * 扣减金额 * @param accountNo * @param amount */ @Override @Transactional //只要标记@Hmily就是try方法，在注解中指定confirm、cancel两个方法的名字 @Hmily(confirmMethod="commit",cancelMethod="rollback") public void updateAccountBalance(String accountNo, Double amount) { //获取全局事务id String transId = HmilyTransactionContextLocal.getInstance().get().getTransId(); log.info("bank1 try begin 开始执行...xid:{}",transId); //幂等判断 判断local_try_log表中是否有try日志记录，如果有则不再执行 if(accountInfoDao.isExistTry(transId)>0){ log.info("bank1 try 已经执行，无需重复执行,xid:{}",transId); return ; } //try悬挂处理，如果cancel、confirm有一个已经执行了，try不再执行 if(accountInfoDao.isExistConfirm(transId)>0 || accountInfoDao.isExistCancel(transId)>0){ log.info("bank1 try悬挂处理 cancel或confirm已经执行，不允许执行try,xid:{}",transId); return ; } //扣减金额 if(accountInfoDao.subtractAccountBalance(accountNo, amount)<=0){ //扣减失败 throw new RuntimeException("bank1 try 扣减金额失败,xid:{}"+transId); } //插入try执行记录,用于幂等判断 accountInfoDao.addTry(transId); //远程调用李四，转账 if(!bank2Client.transfer(amount)){ throw new RuntimeException("bank1 远程调用李四微服务失败,xid:{}"+transId); } if(amount == 2){ throw new RuntimeException("人为制造异常,xid:{}"+transId); } log.info("bank1 try end 结束执行...xid:{}",transId); } //confirm方法 @Transactional public void commit(String accountNo, Double amount){ //获取全局事务id String transId = HmilyTransactionContextLocal.getInstance().get().getTransId(); log.info("bank1 confirm begin 开始执行...xid:{},accountNo:{},amount:{}",transId,accountNo,amount); } /** cancel方法 * cancel幂等校验 * cancel空回滚处理 * 增加可用余额 * @param accountNo * @param amount */ @Transactional public void rollback(String accountNo, Double amount){ //获取全局事务id String transId = HmilyTransactionContextLocal.getInstance().get().getTransId(); log.info("bank1 cancel begin 开始执行...xid:{}",transId); // cancel幂等校验 if(accountInfoDao.isExistCancel(transId)>0){ log.info("bank1 cancel 已经执行，无需重复执行,xid:{}",transId); return ; } //cancel空回滚处理，如果try没有执行，cancel不允许执行 if(accountInfoDao.isExistTry(transId)<=0){ log.info("bank1 空回滚处理，try没有执行，不允许cancel执行,xid:{}",transId); return ; } // 增加可用余额 accountInfoDao.addAccountBalance(accountNo,amount); //插入一条cancel的执行记录 accountInfoDao.addCancel(transId); log.info("bank1 cancel end 结束执行...xid:{}",transId); } }
feignClient
@FeignClient(value="tcc-demo-bank2",fallback=Bank2ClientFallback.class) public interface Bank2Client { //远程调用李四的微服务 @GetMapping("/bank2/transfer") @Hmily public Boolean transfer(@RequestParam("amount") Double amount); }
Web层
@RestController public class Bank1Controller { @Autowired AccountInfoService accountInfoService; @RequestMapping("/transfer") public Boolean transfer(@RequestParam("amount") Double amount) { this.accountInfoService.updateAccountBalance("1", amount); return true; } }
bank2
Dao
@Component @Mapper public interface AccountInfoDao { @Update("update account_info set account_balance=account_balance + #{amount} where account_no=#{accountNo} ") int addAccountBalance(@Param("accountNo") String accountNo, @Param("amount") Double amount); /** * 增加某分支事务try执行记录 * @param localTradeNo 本地事务编号 * @return */ @Insert("insert into local_try_log values(#{txNo},now());") int addTry(String localTradeNo); @Insert("insert into local_confirm_log values(#{txNo},now());") int addConfirm(String localTradeNo); @Insert("insert into local_cancel_log values(#{txNo},now());") int addCancel(String localTradeNo); /** * 查询分支事务try是否已执行 * @param localTradeNo 本地事务编号 * @return */ @Select("select count(1) from local_try_log where tx_no = #{txNo} ") int isExistTry(String localTradeNo); /** * 查询分支事务confirm是否已执行 * @param localTradeNo 本地事务编号 * @return */ @Select("select count(1) from local_confirm_log where tx_no = #{txNo} ") int isExistConfirm(String localTradeNo); /** * 查询分支事务cancel是否已执行 * @param localTradeNo 本地事务编号 * @return */ @Select("select count(1) from local_cancel_log where tx_no = #{txNo} ") int isExistCancel(String localTradeNo); }
service
@Service @Slf4j public class AccountInfoServiceImpl implements AccountInfoService { @Autowired AccountInfoDao accountInfoDao; @Override @Hmily(confirmMethod="confirmMethod", cancelMethod="cancelMethod") public void updateAccountBalance(String accountNo, Double amount) { //获取全局事务id String transId = HmilyTransactionContextLocal.getInstance().get().getTransId(); log.info("bank2 try begin 开始执行...xid:{}",transId); } /** * confirm方法 * confirm幂等校验 * 正式增加金额 * @param accountNo * @param amount */ @Transactional public void confirmMethod(String accountNo, Double amount){ //获取全局事务id String transId = HmilyTransactionContextLocal.getInstance().get().getTransId(); log.info("bank2 confirm begin 开始执行...xid:{}",transId); if(accountInfoDao.isExistConfirm(transId)>0){ log.info("bank2 confirm 已经执行，无需重复执行...xid:{}",transId); return ; } //增加金额 accountInfoDao.addAccountBalance(accountNo,amount); //增加一条confirm日志，用于幂等 accountInfoDao.addConfirm(transId); log.info("bank2 confirm end 结束执行...xid:{}",transId); } /** * @param accountNo * @param amount */ public void cancelMethod(String accountNo, Double amount){ //获取全局事务id String transId = HmilyTransactionContextLocal.getInstance().get().getTransId(); log.info("bank2 cancel begin 开始执行...xid:{}",transId); } }
web层
@RestController public class Bank2Controller { @Autowired AccountInfoService accountInfoService; @RequestMapping("/transfer") public Boolean transfer(@RequestParam("amount") Double amount) { this.accountInfoService.updateAccountBalance("2", amount); return true; } }
测试
2020-03-10 12:38:09.513 DEBUG 23404 --- [nio-9903-exec-6] o.d.h.c.s.e.HmilyTransactionExecutor : ......hmily transaction starter.... 2020-03-10 12:38:09.517 INFO 23404 --- [nio-9903-exec-6] c.t.h.s.impl.AccountInfoServiceImpl : bank1 try begin 开始执行...xid:1237236275664916480 2020-03-10 12:38:09.521 DEBUG 23404 --- [nio-9903-exec-6] c.t.hmily.dao.AccountInfoDao.isExistTry : ==> Preparing: select count(1) from local_try_log where tx_no = ? 2020-03-10 12:38:09.523 DEBUG 23404 --- [nio-9903-exec-6] c.t.hmily.dao.AccountInfoDao.isExistTry : ==> Parameters: 1237236275664916480(String) 2020-03-10 12:38:09.526 DEBUG 23404 --- [nio-9903-exec-6] c.t.hmily.dao.AccountInfoDao.isExistTry : <== Total: 1 2020-03-10 12:38:09.527 DEBUG 23404 --- [nio-9903-exec-6] c.t.h.dao.AccountInfoDao.isExistConfirm : ==> Preparing: select count(1) from local_confirm_log where tx_no = ? 2020-03-10 12:38:09.528 DEBUG 23404 --- [nio-9903-exec-6] c.t.h.dao.AccountInfoDao.isExistConfirm : ==> Parameters: 1237236275664916480(String) 2020-03-10 12:38:09.529 DEBUG 23404 --- [nio-9903-exec-6] c.t.h.dao.AccountInfoDao.isExistConfirm : <== Total: 1 2020-03-10 12:38:09.529 DEBUG 23404 --- [nio-9903-exec-6] c.t.h.dao.AccountInfoDao.isExistCancel : ==> Preparing: select count(1) from local_cancel_log where tx_no = ? 2020-03-10 12:38:09.529 DEBUG 23404 --- [nio-9903-exec-6] c.t.h.dao.AccountInfoDao.isExistCancel : ==> Parameters: 1237236275664916480(String) 2020-03-10 12:38:09.530 DEBUG 23404 --- [nio-9903-exec-6] c.t.h.dao.AccountInfoDao.isExistCancel : <== Total: 1 2020-03-10 12:38:09.531 DEBUG 23404 --- [nio-9903-exec-6] c.t.h.d.A.subtractAccountBalance : ==> Preparing: update account_info set account_balance=account_balance - ? where account_balance>=? and account_no=? 2020-03-10 12:38:09.531 DEBUG 23404 --- [nio-9903-exec-6] c.t.h.d.A.subtractAccountBalance : ==> Parameters: 100.0(Double), 100.0(Double), 1(String) 2020-03-10 12:38:09.533 DEBUG 23404 --- [nio-9903-exec-6] c.t.h.d.A.subtractAccountBalance : <== Updates: 1 2020-03-10 12:38:09.534 DEBUG 23404 --- [nio-9903-exec-6] c.t.hmily.dao.AccountInfoDao.addTry : ==> Preparing: insert into local_try_log values(?,now()); 2020-03-10 12:38:09.534 DEBUG 23404 --- [nio-9903-exec-6] c.t.hmily.dao.AccountInfoDao.addTry : ==> Parameters: 1237236275664916480(String) 2020-03-10 12:38:09.536 DEBUG 23404 --- [nio-9903-exec-6] c.t.hmily.dao.AccountInfoDao.addTry : <== Updates: 1 2020-03-10 12:38:09.593 INFO 23404 --- [nio-9903-exec-6] c.t.h.s.impl.AccountInfoServiceImpl : bank1 try end 结束执行...xid:1237236275664916480 2020-03-10 12:38:09.599 DEBUG 23404 --- [nDataHandler-27] o.d.h.c.s.e.HmilyTransactionExecutor : hmily transaction confirm .......！start 2020-03-10 12:38:09.600 INFO 23404 --- [nDataHandler-27] c.t.h.s.impl.AccountInfoServiceImpl : bank1 confirm begin 开始执行...xid:1237236275664916480,accountNo:1,amount:100.0 2020-03-10 12:38:13.389 INFO 23404 --- [elf-recovery-11] .s.HmilyTransactionSelfRecoveryScheduled : self recovery execute delayTime:30 2020-03-10 12:38:31.350 INFO 23404 --- [self-recovery-1] .s.HmilyTransactionSelfRecoveryScheduled : self recovery execute delayTime:30 2020-03-10 12:38:31.880 INFO 23404 --- [elf-recovery-22] .s.HmilyTransactionSelfRecoveryScheduled : self recovery execute delayTime:30 2020-03-10 12:38:43.391 INFO 23404 --- [elf-recovery-11] .s.HmilyTransactionSelfRecoveryScheduled : self recovery execute delayTime:30
2020-03-10 12:38:09.578 DEBUG 23320 --- [nio-9904-exec-9] o.d.h.c.s.e.HmilyTransactionExecutor : participant hmily transaction start..：HmilyTransactionContext(transId=1237236275664916480, action=1, role=1) 2020-03-10 12:38:09.580 INFO 23320 --- [nio-9904-exec-9] c.t.h.s.impl.AccountInfoServiceImpl : bank2 try begin 开始执行...xid:1237236275664916480 2020-03-10 12:38:09.617 DEBUG 23320 --- [io-9904-exec-10] o.d.h.c.s.e.HmilyTransactionExecutor : hmily transaction confirm .......！start 2020-03-10 12:38:09.621 INFO 23320 --- [io-9904-exec-10] c.t.h.s.impl.AccountInfoServiceImpl : bank2 confirm begin 开始执行...xid:1237236275664916480 2020-03-10 12:38:09.625 DEBUG 23320 --- [io-9904-exec-10] c.t.h.dao.AccountInfoDao.isExistConfirm : ==> Preparing: select count(1) from local_confirm_log where tx_no = ? 2020-03-10 12:38:09.627 DEBUG 23320 --- [io-9904-exec-10] c.t.h.dao.AccountInfoDao.isExistConfirm : ==> Parameters: 1237236275664916480(String) 2020-03-10 12:38:09.631 DEBUG 23320 --- [io-9904-exec-10] c.t.h.dao.AccountInfoDao.isExistConfirm : <== Total: 1 2020-03-10 12:38:09.632 DEBUG 23320 --- [io-9904-exec-10] c.t.h.d.A.addAccountBalance : ==> Preparing: update account_info set account_balance=account_balance + ? where account_no=? 2020-03-10 12:38:09.632 DEBUG 23320 --- [io-9904-exec-10] c.t.h.d.A.addAccountBalance : ==> Parameters: 100.0(Double), 2(String) 2020-03-10 12:38:09.634 DEBUG 23320 --- [io-9904-exec-10] c.t.h.d.A.addAccountBalance : <== Updates: 1 2020-03-10 12:38:09.634 DEBUG 23320 --- [io-9904-exec-10] c.t.hmily.dao.AccountInfoDao.addConfirm : ==> Preparing: insert into local_confirm_log values(?,now()); 2020-03-10 12:38:09.635 DEBUG 23320 --- [io-9904-exec-10] c.t.hmily.dao.AccountInfoDao.addConfirm : ==> Parameters: 1237236275664916480(String) 2020-03-10 12:38:09.637 DEBUG 23320 --- [io-9904-exec-10] c.t.hmily.dao.AccountInfoDao.addConfirm : <== Updates: 1 2020-03-10 12:38:09.637 INFO 23320 --- [io-9904-exec-10] c.t.h.s.impl.AccountInfoServiceImpl : bank2 confirm end 结束执行...xid:1237236275664916480
转账失败的时候：
2020-03-10 12:40:01.361 INFO 23404 --- [self-recovery-1] .s.HmilyTransactionSelfRecoveryScheduled : self recovery execute delayTime:30 2020-03-10 12:40:01.887 INFO 23404 --- [elf-recovery-22] .s.HmilyTransactionSelfRecoveryScheduled : self recovery execute delayTime:30 2020-03-10 12:40:02.294 DEBUG 23404 --- [nio-9903-exec-9] o.d.h.c.s.e.HmilyTransactionExecutor : ......hmily transaction starter.... 2020-03-10 12:40:02.295 INFO 23404 --- [nio-9903-exec-9] c.t.h.s.impl.AccountInfoServiceImpl : bank1 try begin 开始执行...xid:1237236748702715904 2020-03-10 12:40:02.295 DEBUG 23404 --- [nio-9903-exec-9] c.t.hmily.dao.AccountInfoDao.isExistTry : ==> Preparing: select count(1) from local_try_log where tx_no = ? 2020-03-10 12:40:02.295 DEBUG 23404 --- [nio-9903-exec-9] c.t.hmily.dao.AccountInfoDao.isExistTry : ==> Parameters: 1237236748702715904(String) 2020-03-10 12:40:02.297 DEBUG 23404 --- [nio-9903-exec-9] c.t.hmily.dao.AccountInfoDao.isExistTry : <== Total: 1 2020-03-10 12:40:02.298 DEBUG 23404 --- [nio-9903-exec-9] c.t.h.dao.AccountInfoDao.isExistConfirm : ==> Preparing: select count(1) from local_confirm_log where tx_no = ? 2020-03-10 12:40:02.299 DEBUG 23404 --- [nio-9903-exec-9] c.t.h.dao.AccountInfoDao.isExistConfirm : ==> Parameters: 1237236748702715904(String) 2020-03-10 12:40:02.303 DEBUG 23404 --- [nio-9903-exec-9] c.t.h.dao.AccountInfoDao.isExistConfirm : <== Total: 1 2020-03-10 12:40:02.304 DEBUG 23404 --- [nio-9903-exec-9] c.t.h.dao.AccountInfoDao.isExistCancel : ==> Preparing: select count(1) from local_cancel_log where tx_no = ? 2020-03-10 12:40:02.304 DEBUG 23404 --- [nio-9903-exec-9] c.t.h.dao.AccountInfoDao.isExistCancel : ==> Parameters: 1237236748702715904(String) 2020-03-10 12:40:02.305 DEBUG 23404 --- [nio-9903-exec-9] c.t.h.dao.AccountInfoDao.isExistCancel : <== Total: 1 2020-03-10 12:40:02.306 DEBUG 23404 --- [nio-9903-exec-9] c.t.h.d.A.subtractAccountBalance : ==> Preparing: update account_info set account_balance=account_balance - ? where account_balance>=? and account_no=? 2020-03-10 12:40:02.306 DEBUG 23404 --- [nio-9903-exec-9] c.t.h.d.A.subtractAccountBalance : ==> Parameters: 2.0(Double), 2.0(Double), 1(String) 2020-03-10 12:40:02.308 DEBUG 23404 --- [nio-9903-exec-9] c.t.h.d.A.subtractAccountBalance : <== Updates: 1 2020-03-10 12:40:02.309 DEBUG 23404 --- [nio-9903-exec-9] c.t.hmily.dao.AccountInfoDao.addTry : ==> Preparing: insert into local_try_log values(?,now()); 2020-03-10 12:40:02.309 DEBUG 23404 --- [nio-9903-exec-9] c.t.hmily.dao.AccountInfoDao.addTry : ==> Parameters: 1237236748702715904(String) 2020-03-10 12:40:02.310 DEBUG 23404 --- [nio-9903-exec-9] c.t.hmily.dao.AccountInfoDao.addTry : <== Updates: 1 2020-03-10 12:40:02.326 DEBUG 23404 --- [nDataHandler-28] o.d.h.c.s.e.HmilyTransactionExecutor : tcc cancel ...........start! 2020-03-10 12:40:02.327 INFO 23404 --- [nDataHandler-28] c.t.h.s.impl.AccountInfoServiceImpl : bank1 cancel begin 开始执行...xid:1237236748702715904 2020-03-10 12:40:02.327 DEBUG 23404 --- [nDataHandler-28] c.t.h.dao.AccountInfoDao.isExistCancel : ==> Preparing: select count(1) from local_cancel_log where tx_no = ? 2020-03-10 12:40:02.328 DEBUG 23404 --- [nDataHandler-28] c.t.h.dao.AccountInfoDao.isExistCancel : ==> Parameters: 1237236748702715904(String) 2020-03-10 12:40:02.329 DEBUG 23404 --- [nDataHandler-28] c.t.h.dao.AccountInfoDao.isExistCancel : <== Total: 1 2020-03-10 12:40:02.329 DEBUG 23404 --- [nDataHandler-28] c.t.hmily.dao.AccountInfoDao.isExistTry : ==> Preparing: select count(1) from local_try_log where tx_no = ? 2020-03-10 12:40:02.329 DEBUG 23404 --- [nDataHandler-28] c.t.hmily.dao.AccountInfoDao.isExistTry : ==> Parameters: 1237236748702715904(String) 2020-03-10 12:40:02.330 DEBUG 23404 --- [nDataHandler-28] c.t.hmily.dao.AccountInfoDao.isExistTry : <== Total: 1 2020-03-10 12:40:02.330 INFO 23404 --- [nDataHandler-28] c.t.h.s.impl.AccountInfoServiceImpl : bank1 空回滚处理，try没有执行，不允许cancel执行,xid:1237236748702715904 2020-03-10 12:40:02.334 ERROR 23404 --- [nio-9903-exec-9] o.a.c.c.C.[.[.[.[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [/bank1] threw exception [Request processing failed; nested exception is java.lang.RuntimeException: 人为制造异常,xid:{}1237236748702715904] with root cause java.lang.RuntimeException: 人为制造异常,xid:{}1237236748702715904 at com.topcheer.hmily.service.impl.AccountInfoServiceImpl.updateAccountBalance(AccountInfoServiceImpl.java:70) ~[classes/:na] at com.topcheer.hmily.service.impl.AccountInfoServiceImpl$$FastClassBySpringCGLIB$$5df86849.invoke(<generated>) ~[classes/:na] at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749) ~[spring-aop-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294) ~[spring-tx-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98) ~[spring-tx-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) ~[spring-aop-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88) ~[spring-aop-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.dromara.hmily.core.service.handler.StarterHmilyTransactionHandler.handler(StarterHmilyTransactionHandler.java:70) ~[hmily-core-2.0.4-RELEASE.jar:2.0.4-RELEASE] at org.dromara.hmily.core.service.impl.HmilyTransactionAspectServiceImpl.invoke(HmilyTransactionAspectServiceImpl.java:63) ~[hmily-core-2.0.4-RELEASE.jar:2.0.4-RELEASE] at org.dromara.hmily.springcloud.interceptor.SpringCloudHmilyTransactionInterceptor.interceptor(SpringCloudHmilyTransactionInterceptor.java:78) ~[hmily-springcloud-2.0.4-RELEASE.jar:2.0.4-RELEASE] at org.dromara.hmily.core.interceptor.AbstractHmilyTransactionAspect.interceptTccMethod(AbstractHmilyTransactionAspect.java:61) ~[hmily-core-2.0.4-RELEASE.jar:2.0.4-RELEASE] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_121] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_121] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_121] at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644) ~[spring-aop-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633) ~[spring-aop-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70) ~[spring-aop-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175) ~[spring-aop-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) ~[spring-aop-5.1.5.RELEASE.jar:5.1.5.RELEASE] at com.topcheer.hmily.service.impl.AccountInfoServiceImpl$$EnhancerBySpringCGLIB$$e5c6bb3b.updateAccountBalance(<generated>) ~[classes/:na] at com.topcheer.hmily.controller.Bank1Controller.transfer(Bank1Controller.java:20) ~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_121] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_121] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_121] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800) ~[spring-webmvc-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) ~[spring-webmvc-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) ~[spring-webmvc-5.1.5.RELEASE.jar:5.1.5.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.5.RELEASE.jar:5.1.5.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.16.jar:9.0.16] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:90) ~[spring-boot-actuator-2.1.3.RELEASE.jar:2.1.3.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:117) ~[spring-boot-actuator-2.1.3.RELEASE.jar:2.1.3.RELEASE] at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:106) ~[spring-boot-actuator-2.1.3.RELEASE.jar:2.1.3.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.5.RELEASE.jar:5.1.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200) ~[tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834) [tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415) [tomcat-embed-core-9.0.16.jar:9.0.16] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.16.jar:9.0.16] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_121] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_121] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.16.jar:9.0.16] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121] 2020-03-10 12:40:13.398 INFO 23404 --- [elf-recovery-11] .s.HmilyTransactionSelfRecoveryScheduled : self recovery execute delayTime:30
2020-03-10 12:40:02.318 DEBUG 23320 --- [nio-9904-exec-2] o.d.h.c.s.e.HmilyTransactionExecutor : participant hmily transaction start..：HmilyTransactionContext(transId=1237236748702715904, action=1, role=1) 2020-03-10 12:40:02.318 INFO 23320 --- [nio-9904-exec-2] c.t.h.s.impl.AccountInfoServiceImpl : bank2 try begin 开始执行...xid:1237236748702715904 2020-03-10 12:40:02.343 DEBUG 23320 --- [nio-9904-exec-3] o.d.h.c.s.e.HmilyTransactionExecutor : tcc cancel ...........start! 2020-03-10 12:40:02.343 INFO 23320 --- [nio-9904-exec-3] c.t.h.s.impl.AccountInfoServiceImpl : bank2 cancel begin 开始执行...xid:1237236748702715904 2020-03-10 12:40:22.229 INFO 23320 --- [self-recovery-2] .s.HmilyTransactionSelfRecoveryScheduled : self recovery execute delayTime:30
如果拿TCC事务的处理流程与2PC两阶段提交做比较，2PC通常都是在跨库的DB层面，而TCC则在应用层面的处
理，需要通过业务逻辑来实现。这种分布式事务的实现方式的优势在于，可以让应用自己定义数据操作的粒度，使
得降低锁冲突、提高吞吐量成为可能。
而不足之处则在于对应用的侵入性非常强，业务逻辑的每个分支都需要实现try、confirm、cancel三个操作。此
外，其实现难度也比较大，需要按照网络状态、系统故障等不同的失败原因实现不同的回滚策略。