选择案例 https://github.com/seata/seata-samples/tree/master/springcloud-eureka-feign-mybatis-seata
0. 建表语句
undo_log 为事务回滚之用
CREATE DATABASE `seat_account`;
USE `seat_account`;
CREATE TABLE `undo_log` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`branch_id` bigint(20) NOT NULL,
`xid` varchar(100) NOT NULL,
`context` varchar(128) NOT NULL,
`rollback_info` longblob NOT NULL,
`log_status` int(11) NOT NULL,
`log_created` datetime NOT NULL,
`log_modified` datetime NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
CREATE TABLE `account` (
`id` bigint(11) NOT NULL AUTO_INCREMENT COMMENT 'id',
`user_id` bigint(11) DEFAULT NULL COMMENT '用户id',
`total` decimal(10,0) DEFAULT NULL COMMENT '总额度',
`used` decimal(10,0) DEFAULT NULL COMMENT '已用余额',
`residue` decimal(10,0) DEFAULT '0' COMMENT '剩余可用额度',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
INSERT INTO `seat_account`.`account` (`id`, `user_id`, `total`, `used`, `residue`) VALUES ('1', '1', '1000', '0', '100');
CREATE DATABASE `seat_order`;
USE `seat_order`;
CREATE TABLE `order` (
`id` bigint(11) NOT NULL AUTO_INCREMENT,
`user_id` bigint(11) DEFAULT NULL COMMENT '用户id',
`product_id` bigint(11) DEFAULT NULL COMMENT '产品id',
`count` int(11) DEFAULT NULL COMMENT '数量',
`money` decimal(11,0) DEFAULT NULL COMMENT '金额',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;
ALTER TABLE `order` ADD COLUMN `status` int(1) DEFAULT NULL COMMENT '订单状态：0：创建中；1：已完结' AFTER `money` ;
CREATE TABLE `undo_log` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`branch_id` bigint(20) NOT NULL,
`xid` varchar(100) NOT NULL,
`context` varchar(128) NOT NULL,
`rollback_info` longblob NOT NULL,
`log_status` int(11) NOT NULL,
`log_created` datetime NOT NULL,
`log_modified` datetime NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
CREATE DATABASE seat_storage;
USE seat_storage;
CREATE TABLE `storage` (
`id` bigint(11) NOT NULL AUTO_INCREMENT,
`product_id` bigint(11) DEFAULT NULL COMMENT '产品id',
`total` int(11) DEFAULT NULL COMMENT '总库存',
`used` int(11) DEFAULT NULL COMMENT '已用库存',
`residue` int(11) DEFAULT NULL COMMENT '剩余库存',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
INSERT INTO `seat_storage`.`storage` (`id`, `product_id`, `total`, `used`, `residue`) VALUES ('1', '1', '100', '0', '100');
CREATE TABLE `undo_log` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`branch_id` bigint(20) NOT NULL,
`xid` varchar(100) NOT NULL,
`context` varchar(128) NOT NULL,
`rollback_info` longblob NOT NULL,
`log_status` int(11) NOT NULL,
`log_created` datetime NOT NULL,
`log_modified` datetime NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
CREATE DATABASE seat_server;
USE seat_server;
-- the table to store GlobalSession data
drop table IF EXISTS `global_table`;
create table `global_table` (
`xid` varchar(128) not null,
`transaction_id` bigint,
`status` tinyint not null,
`application_id` varchar(32),
`transaction_service_group` varchar(32),
`transaction_name` varchar(64),
`timeout` int,
`begin_time` bigint,
`application_data` varchar(2000),
`gmt_create` datetime,
`gmt_modified` datetime,
primary key (`xid`),
key `idx_gmt_modified_status` (`gmt_modified`, `status`),
key `idx_transaction_id` (`transaction_id`)
);
-- the table to store BranchSession data
drop table IF EXISTS `branch_table`;
create table `branch_table` (
`branch_id` bigint not null,
`xid` varchar(128) not null,
`transaction_id` bigint ,
`resource_group_id` varchar(32),
`resource_id` varchar(256) ,
`lock_key` varchar(128) ,
`branch_type` varchar(8) ,
`status` tinyint,
`client_id` varchar(64),
`application_data` varchar(2000),
`gmt_create` datetime,
`gmt_modified` datetime,
primary key (`branch_id`),
key `idx_xid` (`xid`)
);
-- the table to store lock data
drop table IF EXISTS `lock_table`;
create table `lock_table` (
`row_key` varchar(128) not null,
`xid` varchar(96),
`transaction_id` long ,
`branch_id` long,
`resource_id` varchar(256) ,
`table_name` varchar(32) ,
`pk` varchar(32) ,
`gmt_create` datetime ,
`gmt_modified` datetime,
primary key(`row_key`)
);
1. 踩坑
can not register RM,err:register error,role:RMROLE,err
can not register RM,err:can not connect to services-server.
解决：服务端和客户端的file.conf中的service配置中都改为default.grouplist = "195.168.36.101（外网IP）:8091" 。并使用seata服务的版本为seata-server-1.2.0。
2. 流转
最初的order会创建一个订单，然后扣减库存，然后扣减账户，账户扣减完，会回头修改订单的金额和状态，调用成环。
3. 事务回滚
order
@GlobalTransactional(name = "fsp-create-order",rollbackFor = Exception.class)
public void create(Order order) {
LOGGER.info("------->交易开始");
//本地方法
orderDao.create(order);
//远程方法 扣减库存
storageApi.decrease(order.getProductId(),order.getCount());
//远程方法 扣减账户余额
LOGGER.info("------->扣减账户开始order中");
accountApi.decrease(order.getUserId(),order.getMoney());
LOGGER.info("------->扣减账户结束order中");
LOGGER.info("------->交易结束");
}
事务回滚日志
account
@Override
public void decrease(Long userId, BigDecimal money) {
LOGGER.info("------->扣减账户开始account中");
//模拟超时异常，全局事务回滚
try {
Thread.sleep(30*1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
accountDao.decrease(userId,money);
LOGGER.info("------->扣减账户结束account中");
//修改订单状态，此调用会导致调用成环
LOGGER.info("修改订单状态开始");
String mes = orderApi.update(userId, money.multiply(new BigDecimal("0.09")),0);
LOGGER.info("修改订单状态结束：{}",mes);
}
storage
-
事务提交
注释account中的模拟异常。提交成功
执行结果
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