Seata分布式事务落地解决方案

create database seata_demo;

use seata_demo;

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for account_tbl
-- ----------------------------
DROP TABLE IF EXISTS `account_tbl`;
CREATE TABLE `account_tbl`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `money` int(11) UNSIGNED NULL DEFAULT 0,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = COMPACT;

-- ----------------------------
-- Records of account_tbl
-- ----------------------------
INSERT INTO `account_tbl` VALUES (1, 'user202103032042012', 1000);

-- ----------------------------
-- Table structure for order_tbl
-- ----------------------------
DROP TABLE IF EXISTS `order_tbl`;
CREATE TABLE `order_tbl`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `commodity_code` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `count` int(11) NULL DEFAULT 0,
  `money` int(11) NULL DEFAULT 0,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = COMPACT;

-- ----------------------------
-- Records of order_tbl
-- ----------------------------

-- ----------------------------
-- Table structure for storage_tbl
-- ----------------------------
DROP TABLE IF EXISTS `storage_tbl`;
CREATE TABLE `storage_tbl`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `commodity_code` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `count` int(11) UNSIGNED NULL DEFAULT 0,
  PRIMARY KEY (`id`) USING BTREE,
  UNIQUE INDEX `commodity_code`(`commodity_code`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = COMPACT;

-- ----------------------------
-- Records of storage_tbl
-- ----------------------------
INSERT INTO `storage_tbl` VALUES (1, '100202003032041', 10);

SET FOREIGN_KEY_CHECKS = 1;

curl -d  "userId=user202103032042012&commodityCode=100202003032041&count=20&money=200" -X POST http://localhost:8082/order

## seata注册中心配置
registry {
  ## tc服务的注册中心类，这里选择nacos，也可以是eureka、zookeeper等
  type = "nacos"
​
  nacos {
    ## seata tc 服务注册到 nacos的服务名称，可以自定义
    application = "seata-tc-server"
    ## nacos注册中心地址
    serverAddr = "127.0.0.1:8848"
    ## 默认分组即可
    group = "DEFAULT_GROUP"
    ## 默认命令空间public
    namespace = ""
    ## seata所属的集群名
    cluster = "SH"
    ## nacos用户名和密码
    username = "nacos"
    password = "nacos"
  }
}
​
## seata配置中心配置
config {
  ## 读取tc服务端的配置文件的方式，这里是从nacos配置中心读取，这样如果tc是集群，可以共享配置
  type = "nacos"
  ## 配置nacos地址等信息
  nacos {
    serverAddr = "127.0.0.1:8848"
    namespace = ""
    group = "SEATA_GROUP"
    username = "nacos"
    password = "nacos"
    dataId = "seataServer.properties"
  }
}

# 数据存储方式，db代表数据库
store.mode=db
store.db.datasource=druid
store.db.dbType=mysql
store.db.driverClassName=com.mysql.jdbc.Driver
store.db.url=jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true&rewriteBatchedStatements=true
store.db.user=root
store.db.password=123
store.db.minConn=5
store.db.maxConn=30
store.db.globalTable=global_table
store.db.branchTable=branch_table
store.db.queryLimit=100
store.db.lockTable=lock_table
store.db.maxWait=5000
# 事务、日志等配置
server.recovery.committingRetryPeriod=1000
server.recovery.asynCommittingRetryPeriod=1000
server.recovery.rollbackingRetryPeriod=1000
server.recovery.timeoutRetryPeriod=1000
server.maxCommitRetryTimeout=-1
server.maxRollbackRetryTimeout=-1
server.rollbackRetryTimeoutUnlockEnable=false
server.undo.logSaveDays=7
server.undo.logDeletePeriod=86400000
​
# 客户端与服务端传输方式
transport.serialization=seata
transport.compressor=none
# 关闭metrics功能，提高性能
metrics.enabled=false
metrics.registryType=compact
metrics.exporterList=prometheus
metrics.exporterPrometheusPort=9898

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS =0;
​
-- ----------------------------
-- 分支事务表
-- ----------------------------
DROPTABLEIFEXISTS`branch_table`;
CREATETABLE`branch_table`  (
  `branch_id`bigint(20)NOTNULL,
  `xid`varchar(128)CHARACTERSET utf8 COLLATE utf8_general_ci NOTNULL,
  `transaction_id`bigint(20)NULLDEFAULTNULL,
  `resource_group_id`varchar(32)CHARACTERSET utf8 COLLATE utf8_general_ci NULLDEFAULTNULL,
  `resource_id`varchar(256)CHARACTERSET utf8 COLLATE utf8_general_ci NULLDEFAULTNULL,
  `branch_type`varchar(8)CHARACTERSET utf8 COLLATE utf8_general_ci NULLDEFAULTNULL,
  `status`tinyint(4)NULLDEFAULTNULL,
  `client_id`varchar(64)CHARACTERSET utf8 COLLATE utf8_general_ci NULLDEFAULTNULL,
  `application_data`varchar(2000)CHARACTERSET utf8 COLLATE utf8_general_ci NULLDEFAULTNULL,
  `gmt_create`datetime(6)NULLDEFAULTNULL,
  `gmt_modified`datetime(6)NULLDEFAULTNULL,
  PRIMARYKEY(`branch_id`)USINGBTREE,
  INDEX`idx_xid`(`xid`)USINGBTREE
)ENGINE=InnoDBCHARACTERSET= utf8 COLLATE= utf8_general_ci ROW_FORMAT= Compact;
​
-- ----------------------------
-- 全局事务表
-- ----------------------------
DROPTABLEIFEXISTS`global_table`;
CREATETABLE`global_table`  (
  `xid`varchar(128)CHARACTERSET utf8 COLLATE utf8_general_ci NOTNULL,
  `transaction_id`bigint(20)NULLDEFAULTNULL,
  `status`tinyint(4)NOTNULL,
  `application_id`varchar(32)CHARACTERSET utf8 COLLATE utf8_general_ci NULLDEFAULTNULL,
  `transaction_service_group`varchar(32)CHARACTERSET utf8 COLLATE utf8_general_ci NULLDEFAULTNULL,
  `transaction_name`varchar(128)CHARACTERSET utf8 COLLATE utf8_general_ci NULLDEFAULTNULL,
  `timeout`int(11)NULLDEFAULTNULL,
  `begin_time`bigint(20)NULLDEFAULTNULL,
  `application_data`varchar(2000)CHARACTERSET utf8 COLLATE utf8_general_ci NULLDEFAULTNULL,
  `gmt_create`datetimeNULLDEFAULTNULL,
  `gmt_modified`datetimeNULLDEFAULTNULL,
  PRIMARYKEY(`xid`)USINGBTREE,
  INDEX`idx_gmt_modified_status`(`gmt_modified`,`status`)USINGBTREE,
  INDEX`idx_transaction_id`(`transaction_id`)USINGBTREE
)ENGINE=InnoDBCHARACTERSET= utf8 COLLATE= utf8_general_ci ROW_FORMAT= Compact;
​
SET FOREIGN_KEY_CHECKS =1;

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
    <exclusions>
        <!--版本较低，1.3.0，因此排除-->
        <exclusion>
            <artifactId>seata-spring-boot-starter</artifactId>
            <groupId>io.seata</groupId>
        </exclusion>
    </exclusions>
</dependency>
<!--seata starter 采用1.4.2版本-->
<dependency>
    <groupId>io.seata</groupId>
    <artifactId>seata-spring-boot-starter</artifactId>
    <version>${seata.version}</version>
</dependency>

#配置seata信息,微服务需要知道去哪联系作为协调者的seata服务端
seata:
  registry: # TC服务注册中心的配置，微服务根据这些信息去注册中心获取tc服务地址
    # 参考tc服务自己的registry.conf中的配置
    type: nacos
    nacos: # tc
      server-addr: 127.0.0.1:8848
      namespace: ""
      group: DEFAULT_GROUP
      application: seata-tc-server # tc服务在nacos中的服务名称
      # cluster: SH
  tx-service-group: seata-demo # 事务组，根据这个获取tc服务的cluster名称
  service:
    vgroup-mapping: # 事务组与TC服务cluster的映射关系
      seata-demo: SH

seata:
  data-source-proxy-mode: XA

update tb_account set money = money - 10 where id = 1

{
    "id": 1, "money": 100
}

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for undo_log
-- ----------------------------
DROP TABLE IF EXISTS `undo_log`;
CREATE TABLE `undo_log`  (
  `branch_id` bigint(20) NOT NULL COMMENT 'branch transaction id',
  `xid` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'global transaction id',
  `context` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT 'undo_log context,such as serialization',
  `rollback_info` longblob NOT NULL COMMENT 'rollback info',
  `log_status` int(11) NOT NULL COMMENT '0:normal status,1:defense status',
  `log_created` datetime(6) NOT NULL COMMENT 'create datetime',
  `log_modified` datetime(6) NOT NULL COMMENT 'modify datetime',
  UNIQUE INDEX `ux_undo_log`(`xid`, `branch_id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = 'AT transaction mode undo table' ROW_FORMAT = Compact;

-- ----------------------------
-- Records of undo_log
-- ----------------------------



-- ----------------------------
-- Table structure for lock_table
-- ----------------------------
DROP TABLE IF EXISTS `lock_table`;
CREATE TABLE `lock_table`  (
  `row_key` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  `xid` varchar(96) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `transaction_id` bigint(20) NULL DEFAULT NULL,
  `branch_id` bigint(20) NOT NULL,
  `resource_id` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `table_name` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `pk` varchar(36) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `gmt_create` datetime NULL DEFAULT NULL,
  `gmt_modified` datetime NULL DEFAULT NULL,
  PRIMARY KEY (`row_key`) USING BTREE,
  INDEX `idx_branch_id`(`branch_id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;


SET FOREIGN_KEY_CHECKS = 1;

seata:
  data-source-proxy-mode: AT # 默认就是AT

CREATE TABLE `account_freeze_tbl` (
  `xid` varchar(128) NOT NULL,
  `user_id` varchar(255) DEFAULT NULL COMMENT '用户id',
  `freeze_money` int(11) unsigned DEFAULT '0' COMMENT '冻结金额',
  `state` int(1) DEFAULT NULL COMMENT '事务状态，0:try，1:confirm，2:cancel',
  PRIMARY KEY (`xid`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=COMPACT;

package cn.itcast.account.service;

import io.seata.rm.tcc.api.BusinessActionContext;
import io.seata.rm.tcc.api.BusinessActionContextParameter;
import io.seata.rm.tcc.api.LocalTCC;
import io.seata.rm.tcc.api.TwoPhaseBusinessAction;

@LocalTCC
public interface AccountTCCService {

    @TwoPhaseBusinessAction(name = "deduct", commitMethod = "confirm", rollbackMethod = "cancel")
    void deduct(@BusinessActionContextParameter(paramName = "userId") String userId,
                @BusinessActionContextParameter(paramName = "money")int money);

    boolean confirm(BusinessActionContext ctx);

    boolean cancel(BusinessActionContext ctx);
}

package cn.itcast.account.service.impl;

import cn.itcast.account.entity.AccountFreeze;
import cn.itcast.account.mapper.AccountFreezeMapper;
import cn.itcast.account.mapper.AccountMapper;
import cn.itcast.account.service.AccountTCCService;
import io.seata.core.context.RootContext;
import io.seata.rm.tcc.api.BusinessActionContext;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
@Slf4j
public class AccountTCCServiceImpl implements AccountTCCService {

    @Autowired
    private AccountMapper accountMapper;
    @Autowired
    private AccountFreezeMapper freezeMapper;

    @Override
    @Transactional
    public void deduct(String userId, int money) {
        // 0.获取事务id
        String xid = RootContext.getXID();
        //判断freeze中是否有冻结记录,如果有,一定是cancel执行过的,我们拒绝业务
        AccountFreeze accountFreeze = freezeMapper.selectById(xid);
        if(accountFreeze!=null){
            //cancel执行过,此时拒绝执行业务
            return;
        }
        // 1.扣减可用余额
        accountMapper.deduct(userId, money);
        // 2.记录冻结金额，事务状态
        AccountFreeze freeze = new AccountFreeze();
        freeze.setUserId(userId);
        freeze.setFreezeMoney(money);
        freeze.setState(AccountFreeze.State.TRY);
        freeze.setXid(xid);
        freezeMapper.insert(freeze);
    }

    @Override
    public boolean confirm(BusinessActionContext ctx) {
        // 1.获取事务id
        String xid = ctx.getXid();
        // 2.根据id删除冻结记录
        int count = freezeMapper.deleteById(xid);
        return count == 1;
    }

    @Override
    public boolean cancel(BusinessActionContext ctx) {
        // 0.查询冻结记录
        String xid = ctx.getXid();
        AccountFreeze freeze = freezeMapper.selectById(xid);
        //空回滚判断,判断freeze是否为null,为null证明try没执行,需要空回滚
        if (freeze==null){
            String userId=ctx.getActionContext("userId").toString();
            freeze = new AccountFreeze();
            freeze.setUserId(userId);
            freeze.setFreezeMoney(0);
            freeze.setState(AccountFreeze.State.TRY);
            freeze.setXid(xid);
            freezeMapper.insert(freeze);
        }
        // 1.恢复可用余额
        accountMapper.refund(freeze.getUserId(), freeze.getFreezeMoney());
        // 2.将冻结金额清零，状态改为CANCEL
        freeze.setFreezeMoney(0);
        freeze.setState(AccountFreeze.State.CANCEL);
        int count = freezeMapper.updateById(freeze);
        return count == 1;
    }
}

  data-source-proxy-mode: AX

@LocalTCC

registry {
  # tc服务的注册中心类，这里选择nacos，也可以是eureka、zookeeper等
  type = "nacos"
​
  nacos {
    # seata tc 服务注册到 nacos的服务名称，可以自定义
    application = "seata-tc-server"
    serverAddr = "127.0.0.1:8848"
    group = "DEFAULT_GROUP"
    namespace = ""
    cluster = "HZ"
    username = "nacos"
    password = "nacos"
  }
}
​
config {
  # 读取tc服务端的配置文件的方式，这里是从nacos配置中心读取，这样如果tc是集群，可以共享配置
  type = "nacos"
  # 配置nacos地址等信息
  nacos {
    serverAddr = "127.0.0.1:8848"
    namespace = ""
    group = "SEATA_GROUP"
    username = "nacos"
    password = "nacos"
    dataId = "seataServer.properties"
  }
}

seata-server.bat -p8092

# 事务组映射关系
service.vgroupMapping.seata-demo=SH
​
service.enableDegrade=false
service.disableGlobalTransaction=false
# 与TC服务的通信配置
transport.type=TCP
transport.server=NIO
transport.heartbeat=true
transport.enableClientBatchSendRequest=false
transport.threadFactory.bossThreadPrefix=NettyBoss
transport.threadFactory.workerThreadPrefix=NettyServerNIOWorker
transport.threadFactory.serverExecutorThreadPrefix=NettyServerBizHandler
transport.threadFactory.shareBossWorker=false
transport.threadFactory.clientSelectorThreadPrefix=NettyClientSelector
transport.threadFactory.clientSelectorThreadSize=1
transport.threadFactory.clientWorkerThreadPrefix=NettyClientWorkerThread
transport.threadFactory.bossThreadSize=1
transport.threadFactory.workerThreadSize=default
transport.shutdown.wait=3
# RM配置
client.rm.asyncCommitBufferLimit=10000
client.rm.lock.retryInterval=10
client.rm.lock.retryTimes=30
client.rm.lock.retryPolicyBranchRollbackOnConflict=true
client.rm.reportRetryCount=5
client.rm.tableMetaCheckEnable=false
client.rm.tableMetaCheckerInterval=60000
client.rm.sqlParserType=druid
client.rm.reportSuccessEnable=false
client.rm.sagaBranchRegisterEnable=false
# TM配置
client.tm.commitRetryCount=5
client.tm.rollbackRetryCount=5
client.tm.defaultGlobalTransactionTimeout=60000
client.tm.degradeCheck=false
client.tm.degradeCheckAllowTimes=10
client.tm.degradeCheckPeriod=2000
​
# undo日志配置
client.undo.dataValidation=true
client.undo.logSerialization=jackson
client.undo.onlyCareUpdateColumns=true
client.undo.logTable=undo_log
client.undo.compress.enable=true
client.undo.compress.type=zip
client.undo.compress.threshold=64k
client.log.exceptionRate=100

seata:
  config:
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848
      username: nacos
      password: nacos
      group: SEATA_GROUP
      data-id: client.properties