boot版本:2.0.6
cloud版本:Finchley.SR2
lcn版本:5.0.2
官网地址:https://www.codingapi.com/docs/txlcn-lesson02/
首先创建数据表:t_tx_exception
CREATE TABLE `t_tx_exception` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`group_id` varchar(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
`unit_id` varchar(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
`mod_id` varchar(128) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
`transaction_state` tinyint(4) NULL DEFAULT NULL,
`registrar` tinyint(4) NULL DEFAULT NULL,
`remark` varchar(4096) NULL DEFAULT NULL,
`ex_state` tinyint(4) NULL DEFAULT NULL COMMENT '0 未解决 1已解决',
`create_time` datetime NULL DEFAULT NULL,
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;
创建项目 yu-txlcn-tm,
pom.xml
com.codingapi.txlcn
txlcn-tm
5.0.2.RELEASE
更新配置文件bootstrap.yml
tx-lcn:
client:
manager-address: localhost:8070
ribbon:
loadbalancer:
dtx:
enabled: true
logger:
enabled: true
driver-class-name: com.mysql.jdbc.Driver
jdbc-url: jdbc:mysql://localhost:3306/yq?useUnicode=true&characterEncoding=UTF-8&useLegacyDatetimeCode=false&serverTimezone=Asia/Shanghai&useSSL=false&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true
username: root
password: root
yu-txlcn-tm 结构体
application.properties
spring.application.name=yu-txlcn-tm
server.port=7970
#JDBC 数据库配置
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/yq?useUnicode=true&characterEncoding=UTF-8&useLegacyDatetimeCode=false&serverTimezone=Asia/Shanghai&useSSL=false&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true
spring.datasource.username=root
spring.datasource.password=root
#数据库方言
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
# 第一次运行可以设置为: create, 为TM创建持久化数据库表
#spring.jpa.hibernate.ddl-auto=validate
spring.jpa.hibernate.ddl-auto=update
# TM监听IP. 默认为 127.0.0.1
tx-lcn.manager.host=127.0.0.1
# TM监听Socket端口. 默认为 ${server.port} - 100
tx-lcn.manager.port=8070
# 心跳检测时间(ms). 默认为 300000
tx-lcn.manager.heart-time=300000
# 分布式事务执行总时间(ms). 默认为36000
tx-lcn.manager.dtx-time=8000
# 参数延迟删除时间单位ms 默认为dtx-time值
tx-lcn.message.netty.attr-delay-time=${tx-lcn.manager.dtx-time}
# 事务处理并发等级. 默认为机器逻辑核心数5倍
tx-lcn.manager.concurrent-level=160
# TM后台登陆密码,默认值为codingapi
tx-lcn.manager.admin-key=codingapi
# 分布式事务锁超时时间 默认为-1,当-1时会用tx-lcn.manager.dtx-time的时间
tx-lcn.manager.dtx-lock-time=${tx-lcn.manager.dtx-time}
# 雪花算法的sequence位长度,默认为12位.
tx-lcn.manager.seq-len=12
# 异常回调开关。开启时请制定ex-url
tx-lcn.manager.ex-url-enabled=false
# 事务异常通知(任何http协议地址。未指定协议时,为TM提供内置功能接口)。默认是邮件通知
tx-lcn.manager.ex-url=/provider/email-to/[email protected]
# 开启日志,默认为false
#tx-lcn.logger.enabled=true
tx-lcn.logger.driver-class-name=${spring.datasource.driver-class-name}
tx-lcn.logger.jdbc-url=${spring.datasource.url}
tx-lcn.logger.username=${spring.datasource.username}
tx-lcn.logger.password=${spring.datasource.password}
# redis 的设置信息. 线上请用Redis Cluster
spring.redis.host=localhost
spring.redis.port=6379
spring.redis.password=redis
使用之前的 yu-user-service 与 yu-third-service 测试
pom.xml新增
com.codingapi.txlcn
txlcn-tc
5.0.2.RELEASE
com.codingapi.txlcn
txlcn-txmsg-netty
5.0.2.RELEASE
修改启动类 及 调用接口(这里只用user服务做示范,third也需要添加注解的)
/**
* @author Yuqiang
*/
@SpringBootApplication
@EnableFeignClients(basePackages = "com.crayon.*") //激活feign
@EnableCircuitBreaker//激活 hystrix
@EnableDistributedTransaction//激活 分布式事务lcn
public class YuUserServiceApplication {
public static void main(String[] args) {
SpringApplication.run(YuUserServiceApplication.class, args);
}
}
调用接口
//user服务
@Override
@LcnTransaction
@Transactional
public Message insertName(String name) {
Message message =userInvokeService.getUser("嗯嗯");
log.info("调用third: ", message.toString());
UserModel userModel = new UserModel();
userModel.setMobile("13071813602");
userModel.setName("小强");
int count = userDao.insertUser(userModel);
log.info("count: " + count);
int a = 1/0;//故意出错
return new Message("成功", ErrorType.SUCCESS);
}
//third服务
@Override
@LcnTransaction
@Transactional
public int insertThirdRecord(ThirdRecordModel model) {
return thirdRecordDao.insertThirdRecord(model);
}
//测试事务 user,third 都插入完数据后 user异常了
user模块
third模块
但是 数据库 并没有插入数据 ---> 表示事务已生效(回滚数据)
PS:
@LcnTransaction,这个注解会导致数据库连接被分布式事物接管,进而导致连接延迟释放,接口响应时间变长,所以使用时请注意