本文主要介绍SpringBoot2.1.5 + Dubbo 2.7.3 + Mybatis 3.4.2 + Nacos 1.1.3 +Seata 0.8.0整合来实现Dubbo分布式事务管理，使用Nacos 作为 Dubbo和Seata的注册中心和配置中心,使用 MySQL 数据库和 MyBatis来操作数据。
如果你还对SpringBoot、Dubbo、Nacos、Seata、 Mybatis 不是很了解的话，这里我为大家整理个它们的官网网站，如下
-
SpringBoot：https://spring.io/projects/spring-boot
在这里我们就不一个一个介绍它们是怎么使用和原理，详细请学习官方文档，在这里我将开始对它们进行整合，完成一个简单的案例，来让大家了解Seata来实现Dubbo分布式事务管理的基本流程。
nacos下载：https://github.com/alibaba/nacos/releases/tag/1.1.3
Nacos 快速入门：https://nacos.io/en-us/docs/quick-start.html
sh startup.sh -m standalone在浏览器打开Nacos web 控制台：http://192.168.10.200:8848/nacos/index.html
输入nacos的账号和密码 分别为nacos：nacos
2.2.1 在 Seata Release 下载最新版的 Seata Server 并解压得到如下目录：
.
├──bin
├──conf
├──file_store
└──lib目前seata支持如下的file、nacos 、apollo、zk、consul的注册中心和配置中心。这里我们以nacos 为例。
将 type 改为 nacos
registry {
# file nacos
type = "nacos"
nacos {
serverAddr = "192.168.10.200"
namespace = "public"
cluster = "default"
}
file {
name = "file.conf"
}
}
config {
# file、nacos 、apollo、zk、consul
type = "nacos"
nacos {
serverAddr = "192.168.10.200"
namespace = "public"
cluster = "default"
}
file {
name = "file.conf"
}
}
- serverAddr = "192.168.10.200" ：nacos 的地址
- namespace = "public" ：nacos的命名空间默认为
public - cluster = "default" ：集群设置未默认
default
transport.type=TCP
transport.server=NIO
transport.heartbeat=true
transport.thread-factory.boss-thread-prefix=NettyBoss
transport.thread-factory.worker-thread-prefix=NettyServerNIOWorker
transport.thread-factory.server-executor-thread-prefix=NettyServerBizHandler
transport.thread-factory.share-boss-worker=false
transport.thread-factory.client-selector-thread-prefix=NettyClientSelector
transport.thread-factory.client-selector-thread-size=1
transport.thread-factory.client-worker-thread-prefix=NettyClientWorkerThread
transport.thread-factory.boss-thread-size=1
transport.thread-factory.worker-thread-size=8
transport.shutdown.wait=3
service.vgroup_mapping.order-service-seata-service-group=default
service.vgroup_mapping.account-service-seata-service-group=default
service.vgroup_mapping.storage-service-seata-service-group=default
service.vgroup_mapping.business-service-seata-service-group=default
service.enableDegrade=false
service.disable=false
service.max.commit.retry.timeout=-1
service.max.rollback.retry.timeout=-1
client.async.commit.buffer.limit=10000
client.lock.retry.internal=10
client.lock.retry.times=30
store.mode=db
store.file.dir=file_store/data
store.file.max-branch-session-size=16384
store.file.max-global-session-size=512
store.file.file-write-buffer-cache-size=16384
store.file.flush-disk-mode=async
store.file.session.reload.read_size=100
store.db.driver-class-name=com.mysql.jdbc.Driver
store.db.datasource=dbcp
store.db.db-type=mysql
store.db.url=jdbc:mysql://192.168.10.200:3306/seata?useUnicode=true
store.db.user=lidong
store.db.password=cwj887766@@
store.db.min-conn=1
store.db.max-conn=3
store.db.global.table=global_table
store.db.branch.table=branch_table
store.db.query-limit=100
store.db.lock-table=lock_table
recovery.committing-retry-period=1000
recovery.asyn-committing-retry-period=1000
recovery.rollbacking-retry-period=1000
recovery.timeout-retry-period=1000
transaction.undo.data.validation=true
transaction.undo.log.serialization=jackson
transaction.undo.log.save.days=7
transaction.undo.log.delete.period=86400000
transaction.undo.log.table=undo_log
transport.serialization=seata
transport.compressor=none
metrics.enabled=false
metrics.registry-type=compact
metrics.exporter-list=prometheus
metrics.exporter-prometheus-port=9898
这里主要修改了如下几项：
- store.mode :存储模式 默认file 这里我修改为db 模式 ，并且需要三个表
global_table、branch_table和lock_table - store.db.driver-class-name： 默认没有，会报错。添加了
com.mysql.jdbc.Driver - store.db.datasource=dbcp ：数据源 dbcp
- store.db.db-type=mysql : 存储数据库的类型为
mysql - store.db.url=jdbc:mysql://192.168.10.200:3306/seata?useUnicode=true : 修改为自己的数据库
url、port、数据库名称 - store.db.user=lidong :数据库的账号
- store.db.password=cwj887766@@ :数据库的密码
- service.vgroup_mapping.order-service-seata-service-group=default
- service.vgroup_mapping.account-service-seata-service-group=default
- service.vgroup_mapping.storage-service-seata-service-group=default
- service.vgroup_mapping.business-service-seata-service-group=default
也可以在 Nacos 配置页面添加，data-id 为 service.vgroup_mapping.${YOUR_SERVICE_NAME}-seata-service-group, group 为 SEATA_GROUP， 如果不添加该配置，启动后会提示no available server to connect
注意： 配置文件末尾有空行，需要删除，否则会提示失败，尽管实际上是成功的
db模式下的所需的三个表的数据库脚本位于seata\conf\db_store.sql
global_table的表结构
CREATE TABLE `global_table` (
`xid` varchar(128) NOT NULL,
`transaction_id` bigint(20) DEFAULT NULL,
`status` tinyint(4) NOT NULL,
`application_id` varchar(64) DEFAULT NULL,
`transaction_service_group` varchar(64) DEFAULT NULL,
`transaction_name` varchar(64) DEFAULT NULL,
`timeout` int(11) DEFAULT NULL,
`begin_time` bigint(20) DEFAULT NULL,
`application_data` varchar(2000) DEFAULT NULL,
`gmt_create` datetime DEFAULT NULL,
`gmt_modified` datetime DEFAULT NULL,
PRIMARY KEY (`xid`),
KEY `idx_gmt_modified_status` (`gmt_modified`,`status`),
KEY `idx_transaction_id` (`transaction_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
branch_table的表结构
CREATE TABLE `branch_table` (
`branch_id` bigint(20) NOT NULL,
`xid` varchar(128) NOT NULL,
`transaction_id` bigint(20) DEFAULT NULL,
`resource_group_id` varchar(32) DEFAULT NULL,
`resource_id` varchar(256) DEFAULT NULL,
`lock_key` varchar(128) DEFAULT NULL,
`branch_type` varchar(8) DEFAULT NULL,
`status` tinyint(4) DEFAULT NULL,
`client_id` varchar(64) DEFAULT NULL,
`application_data` varchar(2000) DEFAULT NULL,
`gmt_create` datetime DEFAULT NULL,
`gmt_modified` datetime DEFAULT NULL,
PRIMARY KEY (`branch_id`),
KEY `idx_xid` (`xid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
lock_table的表结构
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`)
);
使用命令如下
cd conf
sh nacos-config.sh localhost
成功后会提示
init nacos config finished, please start seata-server
在 Nacos 管理页面应该可以看到有 59 个 Group 为SEATA_GROUP的配置
使用db 模式启动
cd ..
sh ./bin/seata-server.sh这时候在 Nacos 的服务列表下面可以看到一个名为serverAddr的服务
参考官网中用户购买商品的业务逻辑。整个业务逻辑由4个微服务提供支持：
- 库存服务：扣除给定商品的存储数量。
- 订单服务：根据购买请求创建订单。
- 帐户服务：借记用户帐户的余额。
- 业务服务：处理业务逻辑。
请求逻辑架构
springboot-dubbo-seata：https://github.com/lidong1665/springboot-dubbo-seata
-
samples-common ：公共模块
-
samples-account ：用户账号模块
-
samples-order ：订单模块
-
samples-storage ：库存模块
-
samples-business ：业务模块
/**
* @Author: lidong
* @Description 账户服务接口
* @Date Created in 2019/9/5 16:37
*/
public interface AccountDubboService {
/**
* 从账户扣钱
*/
ObjectResponse decreaseAccount(AccountDTO accountDTO);
}/**
* @Author: lidong
* @Description 订单服务接口
* @Date Created in 2019/9/5 16:28
*/
public interface OrderDubboService {
/**
* 创建订单
*/
ObjectResponse<OrderDTO> createOrder(OrderDTO orderDTO);
}/**
* @Author: lidong
* @Description 库存服务
* @Date Created in 2019/9/5 16:22
*/
public interface StorageDubboService {
/**
* 扣减库存
*/
ObjectResponse decreaseStorage(CommodityDTO commodityDTO);
}/**
* @Author: lidong
* @Description
* @Date Created in 2019/9/5 17:17
*/
public interface BusinessService {
/**
* 出处理业务服务
* @param businessDTO
* @return
*/
ObjectResponse handleBusiness(BusinessDTO businessDTO);
}业务逻辑的具体实现主要体现在 订单服务的实现和业务服务的实现
订单服务的实现
@Service
public class TOrderServiceImpl extends ServiceImpl<TOrderMapper, TOrder> implements ITOrderService {
@Reference(version = "1.0.0")
private AccountDubboService accountDubboService;
/**
* 创建订单
* @Param: OrderDTO 订单对象
* @Return: OrderDTO 订单对象
*/
@Override
public ObjectResponse<OrderDTO> createOrder(OrderDTO orderDTO) {
ObjectResponse<OrderDTO> response = new ObjectResponse<>();
//扣减用户账户
AccountDTO accountDTO = new AccountDTO();
accountDTO.setUserId(orderDTO.getUserId());
accountDTO.setAmount(orderDTO.getOrderAmount());
ObjectResponse objectResponse = accountDubboService.decreaseAccount(accountDTO);
//生成订单号
orderDTO.setOrderNo(UUID.randomUUID().toString().replace("-",""));
//生成订单
TOrder tOrder = new TOrder();
BeanUtils.copyProperties(orderDTO,tOrder);
tOrder.setCount(orderDTO.getOrderCount());
tOrder.setAmount(orderDTO.getOrderAmount().doubleValue());
try {
baseMapper.createOrder(tOrder);
} catch (Exception e) {
response.setStatus(RspStatusEnum.FAIL.getCode());
response.setMessage(RspStatusEnum.FAIL.getMessage());
return response;
}
if (objectResponse.getStatus() != 200) {
response.setStatus(RspStatusEnum.FAIL.getCode());
response.setMessage(RspStatusEnum.FAIL.getMessage());
return response;
}
response.setStatus(RspStatusEnum.SUCCESS.getCode());
response.setMessage(RspStatusEnum.SUCCESS.getMessage());
return response;
}
}整个业务的实现逻辑
@Service
@Slf4j
public class BusinessServiceImpl implements BusinessService{
@Reference(version = "1.0.0")
private StorageDubboService storageDubboService;
@Reference(version = "1.0.0")
private OrderDubboService orderDubboService;
private boolean flag;
/**
* 处理业务逻辑
* @Param:
* @Return:
*/
@GlobalTransactional(timeoutMills = 300000, name = "dubbo-gts-seata-example")
@Override
public ObjectResponse handleBusiness(BusinessDTO businessDTO) {
log.info("开始全局事务，XID = " + RootContext.getXID());
ObjectResponse<Object> objectResponse = new ObjectResponse<>();
//1、扣减库存
CommodityDTO commodityDTO = new CommodityDTO();
commodityDTO.setCommodityCode(businessDTO.getCommodityCode());
commodityDTO.setCount(businessDTO.getCount());
ObjectResponse storageResponse = storageDubboService.decreaseStorage(commodityDTO);
//2、创建订单
OrderDTO orderDTO = new OrderDTO();
orderDTO.setUserId(businessDTO.getUserId());
orderDTO.setCommodityCode(businessDTO.getCommodityCode());
orderDTO.setOrderCount(businessDTO.getCount());
orderDTO.setOrderAmount(businessDTO.getAmount());
ObjectResponse<OrderDTO> response = orderDubboService.createOrder(orderDTO);
//打开注释测试事务发生异常后，全局回滚功能
// if (!flag) {
// throw new RuntimeException("测试抛异常后，分布式事务回滚！");
// }
if (storageResponse.getStatus() != 200 || response.getStatus() != 200) {
throw new DefaultException(RspStatusEnum.FAIL);
}
objectResponse.setStatus(RspStatusEnum.SUCCESS.getCode());
objectResponse.setMessage(RspStatusEnum.SUCCESS.getMessage());
objectResponse.setData(response.getData());
return objectResponse;
}
}
我们只需要在业务处理的方法handleBusiness添加一个注解 @GlobalTransactional
@GlobalTransactional(timeoutMills = 300000, name = "dubbo-gts-seata-example")
@Override
public ObjectResponse handleBusiness(BusinessDTO businessDTO) {
}timeoutMills: 超时时间name：事务名称
注意: MySQL必须使用InnoDB engine.
创建数据库 并导入数据库脚本
DROP DATABASE IF EXISTS seata;
CREATE DATABASE seata;
USE seata;
DROP TABLE IF EXISTS `t_account`;
CREATE TABLE `t_account` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`user_id` varchar(255) DEFAULT NULL,
`amount` double(14,2) DEFAULT '0.00',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of t_account
-- ----------------------------
INSERT INTO `t_account` VALUES ('1', '1', '4000.00');
-- ----------------------------
-- Table structure for t_order
-- ----------------------------
DROP TABLE IF EXISTS `t_order`;
CREATE TABLE `t_order` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`order_no` varchar(255) DEFAULT NULL,
`user_id` varchar(255) DEFAULT NULL,
`commodity_code` varchar(255) DEFAULT NULL,
`count` int(11) DEFAULT '0',
`amount` double(14,2) DEFAULT '0.00',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=64 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of t_order
-- ----------------------------
-- ----------------------------
-- Table structure for t_storage
-- ----------------------------
DROP TABLE IF EXISTS `t_storage`;
CREATE TABLE `t_storage` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`commodity_code` varchar(255) DEFAULT NULL,
`name` varchar(255) DEFAULT NULL,
`count` int(11) DEFAULT '0',
PRIMARY KEY (`id`),
UNIQUE KEY `commodity_code` (`commodity_code`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of t_storage
-- ----------------------------
INSERT INTO `t_storage` VALUES ('1', 'C201901140001', '水杯', '1000');
-- ----------------------------
-- Table structure for undo_log
-- 注意此处0.3.0+ 增加唯一索引 ux_undo_log
-- ----------------------------
DROP TABLE IF EXISTS `undo_log`;
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,
`ext` varchar(100) DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of undo_log
-- ----------------------------
SET FOREIGN_KEY_CHECKS=1;会看到如上的4个表
+-------------------------+
| Tables_in_seata |
+-------------------------+
| t_account |
| t_order |
| t_storage |
| undo_log |
+-------------------------+这里为了简化我将这个三张表创建到一个库中,使用是三个数据源来实现。
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<artifactId>springboot-dubbo-seata</artifactId>
<packaging>pom</packaging>
<name>springboot-dubbo-seata</name>
<groupId>io.seata</groupId>
<version>1.0.0</version>
<description>samples-account</description》
<properties>
<springboot.verison>2.1.5.RELEASE</springboot.verison>
<java.version>1.8</java.version>
<druid.version>1.1.10</druid.version>
<mybatis.version>1.3.2</mybatis.version>
<mybatis-plus.version>2.3</mybatis-plus.version>
<nacos.version>0.2.3</nacos.version>
<lombok.version>1.16.22</lombok.version>
<dubbo.version>2.7.3</dubbo.version>
<nacos-client.verison>1.1.3</nacos-client.verison>
<seata.version>0.8.0</seata.version>
<netty.version>4.1.32.Final</netty.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>${springboot.verison}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>${springboot.verison}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>${springboot.verison}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus</artifactId>
<version>${mybatis-plus.version}</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo</artifactId>
<version>${dubbo.version}</version>
<exclusions>
<exclusion>
<artifactId>spring</artifactId>
<groupId>org.springframework</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>${dubbo.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-config-spring -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-config-spring</artifactId>
<version>${dubbo.version}</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-registry-nacos</artifactId>
<version>${dubbo.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.seata/seata-all -->
<dependency>
<groupId>io.seata</groupId>
<artifactId>seata-all</artifactId>
<version>${seata.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba.nacos</groupId>
<artifactId>nacos-client</artifactId>
<version>${nacos-client.verison}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.alibaba.boot/nacos-config-spring-boot-starter -->
<dependency>
<groupId>com.alibaba.boot</groupId>
<artifactId>nacos-config-spring-boot-starter</artifactId>
<version>${nacos.version}</version>
<exclusions>
<exclusion>
<artifactId>nacos-client</artifactId>
<groupId>com.alibaba.nacos</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${springboot.verison}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>${netty.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba.spring</groupId>
<artifactId>spring-context-support</artifactId>
<version>1.0.2</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-deploy-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>
</project>注意：
seata-all: 这个是seata 所需的主要依赖dubbo-spring-boot-starter: springboot dubbo的依赖
其他的就不一一介绍，其他的一目了然，就知道是干什么的。
server.port=8102
spring.application.name=dubbo-account-example
#====================================Dubbo配置===============================================
dubbo.application.id= dubbo-account-example
dubbo.application.name= dubbo-account-example
dubbo.protocol.id=dubbo
dubbo.protocol.name=dubbo
dubbo.registry.id=dubbo-account-example-registry
dubbo.registry.address=nacos://192.168.10.200:8848
dubbo.protocol.port=20880
dubbo.application.qosEnable=false
dubbo.config-center.address=nacos://192.168.10.200:8848
dubbo.metadata-report.address=nacos://192.168.10.200:8848
#====================================mysql 配置============================================
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://192.168.10.200:3306/seata?useSSL=false&useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true
spring.datasource.username=lidong
spring.datasource.password=cwj887766@@
#=====================================mybatis 配置======================================
mybatis.mapper-locations=classpath*:/mapper/*.xml
registry {
# file nacos
type = "nacos"
nacos {
serverAddr = "192.168.10.200"
namespace = "public"
cluster = "default"
}
file {
name = "file.conf"
}
}
config {
# file、nacos 、apollo、zk、consul
type = "nacos"
file {
name = "file.conf"
}
nacos {
serverAddr = "192.168.10.200"
namespace = "public"
cluster = "default"
}
}
package io.seata.samples.integration.account.config;
import com.alibaba.druid.pool.DruidDataSource;
import io.seata.rm.datasource.DataSourceProxy;
import io.seata.spring.annotation.GlobalTransactionScanner;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.transaction.jdbc.JdbcTransactionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
/**
* @Author: llidong
* @Description seata global configuration
* @Date Created in 2019/9/05 10:28
*/
@Configuration
public class SeataAutoConfig {
/**
* autowired datasource config
*/
@Autowired
private DataSourceProperties dataSourceProperties;
/**
* init durid datasource
*
* @Return: druidDataSource datasource instance
*/
@Bean
@Primary
public DruidDataSource druidDataSource(){
DruidDataSource druidDataSource = new DruidDataSource();
druidDataSource.setUrl(dataSourceProperties.getUrl());
druidDataSource.setUsername(dataSourceProperties.getUsername());
druidDataSource.setPassword(dataSourceProperties.getPassword());
druidDataSource.setDriverClassName(dataSourceProperties.getDriverClassName());
druidDataSource.setInitialSize(0);
druidDataSource.setMaxActive(180);
druidDataSource.setMaxWait(60000);
druidDataSource.setMinIdle(0);
druidDataSource.setValidationQuery("Select 1 from DUAL");
druidDataSource.setTestOnBorrow(false);
druidDataSource.setTestOnReturn(false);
druidDataSource.setTestWhileIdle(true);
druidDataSource.setTimeBetweenEvictionRunsMillis(60000);
druidDataSource.setMinEvictableIdleTimeMillis(25200000);
druidDataSource.setRemoveAbandoned(true);
druidDataSource.setRemoveAbandonedTimeout(1800);
druidDataSource.setLogAbandoned(true);
return druidDataSource;
}
/**
* init datasource proxy
* @Param: druidDataSource datasource bean instance
* @Return: DataSourceProxy datasource proxy
*/
@Bean
public DataSourceProxy dataSourceProxy(DruidDataSource druidDataSource){
return new DataSourceProxy(druidDataSource);
}
/**
* init mybatis sqlSessionFactory
* @Param: dataSourceProxy datasource proxy
* @Return: DataSourceProxy datasource proxy
*/
@Bean
public SqlSessionFactory sqlSessionFactory(DataSourceProxy dataSourceProxy) throws Exception {
SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
factoryBean.setDataSource(dataSourceProxy);
factoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
.getResources("classpath*:/mapper/*.xml"));
return factoryBean.getObject();
}
/**
* init global transaction scanner
*
* @Return: GlobalTransactionScanner
*/
@Bean
public GlobalTransactionScanner globalTransactionScanner(){
return new GlobalTransactionScanner("account-gts-seata-example", "account-service-seata-service-group");
}
}其中:
@Bean
public GlobalTransactionScanner globalTransactionScanner(){
return new GlobalTransactionScanner("account-gts-seata-example", "account-service-seata-service-group");
}
GlobalTransactionScanner: 初始化全局的事务扫描器
/**
* Instantiates a new Global transaction scanner.
*
* @param applicationId the application id
* @param txServiceGroup the default server group
*/
public GlobalTransactionScanner(String applicationId, String txServiceGroup) {
this(applicationId, txServiceGroup, DEFAULT_MODE);
}
- applicationId ：为应用id 这里我传入的是
account-gts-seata-example - txServiceGroup: 默认server的分组 这里我传入的是
account-service-seata-service-group这个和我们前面在nacos 配置的是保存一致。 - DEFAULT_MODE：默认的事务模式 为AT_MODE + MT_MODE
package io.seata.samples.integration.account;
import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.config.ConfigFileApplicationListener;
@SpringBootApplication(scanBasePackages = "io.seata.samples.integration.account")
@MapperScan({"io.seata.samples.integration.account.mapper"})
@EnableDubbo(scanBasePackages = "io.seata.samples.integration.account")
public class AccountExampleApplication {
public static void main(String[] args) {
SpringApplication.run(AccountExampleApplication.class, args);
}
}
-
@EnableDubbo等同于@DubboComponentScan和@EnableDubboConfig组合 -
@DubboComponentScan扫描 classpaths 下类中添加了@Service和@Reference将自动注入到spring beans中。 -
@EnableDubboConfig 扫描的dubbo的外部化配置。
启动 samples-account、samples-order、samples-storage、samples-business
并且在nocos的控制台查看注册情况: http://192.168.10.200:8848/nacos/#/serviceManagement
我们可以看到上面的服务都已经注册成功。
使用postman 发送 ：http://localhost:8104/business/dubbo/buy
参数：
{
"userId":"1",
"commodityCode":"C201901140001",
"name":"fan",
"count":50,
"amount":"100"
}返回
{
"status": 200,
"message": "成功",
"data": null
}这时候控制台：
2019-09-05 12:17:34.097 INFO 21860 --- [nio-8104-exec-4] i.s.s.i.c.controller.BusinessController : 请求参数：BusinessDTO(userId=1, commodityCode=C201901140001, name=fan, count=50, amount=100)
2019-09-05 12:17:34.146 INFO 21860 --- [nio-8104-exec-4] i.seata.tm.api.DefaultGlobalTransaction : Begin new global transaction [192.168.10.200:8091:2021380638]
2019-09-05 12:17:34.150 INFO 21860 --- [nio-8104-exec-4] i.s.s.i.c.service.BusinessServiceImpl : 开始全局事务，XID = 192.168.10.200:8091:2021380638
2019-09-05 12:17:36.966 INFO 21860 --- [nio-8104-exec-4] i.seata.tm.api.DefaultGlobalTransaction : [192.168.10.200:8091:2021380638] commit status:Committed
事务提交成功，
我们来看一下数据库数据变化
t_account
我们samples-business将BusinessServiceImpl的handleBusiness2 下面的代码去掉注释
if (!flag) {
throw new RuntimeException("测试抛异常后，分布式事务回滚！");
}
使用postman 发送 ：http://localhost:8104/business/dubbo/buy2
.响应结果：
{
"timestamp": "2019-09-05T04:29:34.178+0000",
"status": 500,
"error": "Internal Server Error",
"message": "测试抛异常后，分布式事务回滚！",
"path": "/business/dubbo/buy"
}控制台
2019-09-05 12:29:32.836 INFO 17264 --- [nio-8104-exec-2] i.s.s.i.c.controller.BusinessController : 请求参数：BusinessDTO(userId=1, commodityCode=C201901140001, name=fan, count=50, amount=100)
2019-09-05 12:29:32.843 INFO 17264 --- [nio-8104-exec-2] i.s.common.loader.EnhancedServiceLoader : load ContextCore[null] extension by class[io.seata.core.context.ThreadLocalContextCore]
2019-09-05 12:29:32.848 INFO 17264 --- [nio-8104-exec-2] i.s.common.loader.EnhancedServiceLoader : load TransactionManager[null] extension by class[io.seata.tm.DefaultTransactionManager]
2019-09-05 12:29:32.849 INFO 17264 --- [nio-8104-exec-2] io.seata.tm.TransactionManagerHolder : TransactionManager Singleton io.seata.tm.DefaultTransactionManager@461585ac
2019-09-05 12:29:32.859 INFO 17264 --- [nio-8104-exec-2] i.s.common.loader.EnhancedServiceLoader : load LoadBalance[null] extension by class[io.seata.discovery.loadbalance.RandomLoadBalance]
2019-09-05 12:29:32.893 INFO 17264 --- [nio-8104-exec-2] i.seata.tm.api.DefaultGlobalTransaction : Begin new global transaction [192.168.10.200:8091:2021380674]
2019-09-05 12:29:32.897 INFO 17264 --- [nio-8104-exec-2] i.s.s.i.c.service.BusinessServiceImpl : 开始全局事务，XID = 192.168.10.200:8091:2021380674
2019-09-05 12:29:34.143 INFO 17264 --- [nio-8104-exec-2] i.seata.tm.api.DefaultGlobalTransaction : [192.168.10.200:8091:2021380674] rollback status:Rollbacked
2019-09-05 12:29:34.158 ERROR 17264 --- [nio-8104-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.RuntimeException: 测试抛异常后，分布式事务回滚！] with root cause
java.lang.RuntimeException: 测试抛异常后，分布式事务回滚！
at io.seata.samples.integration.call.service.BusinessServiceImpl.handleBusiness(BusinessServiceImpl.java:60) ~[classes/:na]
at io.seata.samples.integration.call.service.BusinessServiceImpl$$FastClassBySpringCGLIB$$2ab3d645.invoke(<generated>) ~[classes/:na]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at io.seata.spring.annotation.GlobalTransactionalInterceptor$1.execute(GlobalTransactionalInterceptor.java:104) ~[seata-all-0.8.0.jar:0.8.0]
at io.seata.tm.api.TransactionalTemplate.execute(TransactionalTemplate.java:64) ~[seata-all-0.8.0.jar:0.8.0]
at io.seata.spring.annotation.GlobalTransactionalInterceptor.handleGlobalTransaction(GlobalTransactionalInterceptor.java:101) ~[seata-all-0.8.0.jar:0.8.0]
at io.seata.spring.annotation.GlobalTransactionalInterceptor.invoke(GlobalTransactionalInterceptor.java:76) ~[seata-all-0.8.0.jar:0.8.0]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at io.seata.samples.integration.call.service.BusinessServiceImpl$$EnhancerBySpringCGLIB$$cb43f7ab.handleBusiness(<generated>) ~[classes/:na]
at io.seata.samples.integration.call.controller.BusinessController.handleBusiness(BusinessController.java:37) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.19.jar:9.0.19]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200) ~[tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:836) [tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1747) [tomcat-embed-core-9.0.19.jar:9.0.19]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.19.jar:9.0.19]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_144]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.19.jar:9.0.19]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_144]
我们查看数据库数据，已经回滚，和上面的数据一致。
到这里一个简单的案例基本就分析结束。感谢你的学习。
最后想一起交流技术的可以加我wx:
