springcloud alibaba整合seata

编程语言 2023-08-19 19:13:29 阅读次数: 0

目录

一、seata服务端搭建

1、下载seata-server

2、seata服务端启动

1、修改config目录下的file.conf

2.修改config目录下registry.conf

 3、mysql新建库和表

4、初始化seata配置

1、修改config.txt配置

2、配置添加到nacos

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5、启动seata

二、微服务整合seata

1、新建微服务，引入相关依赖

1、微服务pom.xml

2、seata模块pom.xml

2、子模块pom.xml

3、子模块yml配置

4、建立数据库

5、业务模块

1、库存服务

2、订单模块

6、测试验证

一、seata服务端搭建

1、下载seata-server

选择微服务配套版本的seata-server下载，根据需要选择windows或者linux版本的。

Releases · seata/seata · GitHub

组件版本对照表：

本地搭建我下载的是1.3.0的windows版本

2、seata服务端启动

实际使用需要将事务的一些相关信息存到数据库，启动seata前需要修改相关配置。

1、修改config目录下的file.conf

mode改为db

db模块修改数据库的url，user，password


## transaction log store, only used in seata-server
store {
  ## store mode: file、db、redis
  mode = "db"

  ## file store property
  file {
    ## store location dir
    dir = "sessionStore"
    # branch session size , if exceeded first try compress lockkey, still exceeded throws exceptions
    maxBranchSessionSize = 16384
    # globe session size , if exceeded throws exceptions
    maxGlobalSessionSize = 512
    # file buffer size , if exceeded allocate new buffer
    fileWriteBufferCacheSize = 16384
    # when recover batch read size
    sessionReloadReadSize = 100
    # async, sync
    flushDiskMode = async
  }

  ## database store property
  db {
    ## the implement of javax.sql.DataSource, such as DruidDataSource(druid)/BasicDataSource(dbcp)/HikariDataSource(hikari) etc.
    datasource = "druid"
    ## mysql/oracle/postgresql/h2/oceanbase etc.
    dbType = "mysql"
    driverClassName = "com.mysql.jdbc.Driver"
    url = "jdbc:mysql://101.37.23.0:3306/seata"
    user = "root"
    password = "nymi@2023"
    minConn = 5
    maxConn = 30
    globalTable = "global_table"
    branchTable = "branch_table"
    lockTable = "lock_table"
    queryLimit = 100
    maxWait = 5000
  }

  ## redis store property
  redis {
    host = "127.0.0.1"
    port = "6379"
    password = ""
    database = "0"
    minConn = 1
    maxConn = 10
    queryLimit = 100
  }

}
 

2.修改config目录下registry.conf

此配置是将seata注册到注册中心，seata的配置持久化到配置中心。

我们使用nacos作为注册中心和配置中心。

需要分别将type改为nacos并修改nacos下的配置。

registry {
  # file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
  type = "nacos"

  nacos {
    application = "seata-server"
    serverAddr = "101.37.23.0:80"
    group = "SEATA_GROUP"
    namespace = ""
    cluster = "default"
    username = "nacos"
    password = "nacos"
  }
  eureka {
    serviceUrl = "http://localhost:8761/eureka"
    application = "default"
    weight = "1"
  }
  redis {
    serverAddr = "localhost:6379"
    db = 0
    password = ""
    cluster = "default"
    timeout = 0
  }
  zk {
    cluster = "default"
    serverAddr = "127.0.0.1:2181"
    sessionTimeout = 6000
    connectTimeout = 2000
    username = ""
    password = ""
  }
  consul {
    cluster = "default"
    serverAddr = "127.0.0.1:8500"
  }
  etcd3 {
    cluster = "default"
    serverAddr = "http://localhost:2379"
  }
  sofa {
    serverAddr = "127.0.0.1:9603"
    application = "default"
    region = "DEFAULT_ZONE"
    datacenter = "DefaultDataCenter"
    cluster = "default"
    group = "SEATA_GROUP"
    addressWaitTime = "3000"
  }
  file {
    name = "file.conf"
  }
}

config {
  # file、nacos 、apollo、zk、consul、etcd3
  type = "nacos"

  nacos {
    serverAddr = "101.37.23.0:80"
    namespace = ""
    group = "SEATA_GROUP"
    username = "nacos"
    password = "nacos"
  }
  consul {
    serverAddr = "127.0.0.1:8500"
  }
  apollo {
    appId = "seata-server"
    apolloMeta = "http://192.168.1.204:8801"
    namespace = "application"
  }
  zk {
    serverAddr = "127.0.0.1:2181"
    sessionTimeout = 6000
    connectTimeout = 2000
    username = ""
    password = ""
  }
  etcd3 {
    serverAddr = "http://localhost:2379"
  }
  file {
    name = "file.conf"
  }
}
 

 3、mysql新建库和表

下载seata官网的对应版本的源码。

 下载中心

解压过后复制整个script目录放到seata-server解压后的文件夹下。

进入script/server/db目录，造第1步配置的mysql数据库（seata）中运行mysql.sql脚本（mysql需要先新建名为seata的数据库）

4、初始化seata配置

打开第3步下的 script/config-center目录，

1、修改config.txt配置

修改service.vgroupMapping.guangzhou=default，其中guangzhou处的配置要和项目的微服务一致，后续application.yml里会讲到。

修改store.mode=db

修改store.db.后面的一些数据库相关的配置

2、配置添加到nacos

确保nacos已经启动。

进入script/config-center/nacos目录，

在此处打开git（.sh文件windows下借助git可以运行）

运行下面的命令（ip和port替换为实际的）

sh nacos-config.sh -h ip -p port -g SEATA_GROUP -t seata-group

5、启动seata

进入seata/bin目录，

双击seata-server.bat文件，cmd窗口会显示seata-server的启动情况。

启动成功后，可以在nacos客户端看到seata-server服务已经注册进来了。 

二、微服务整合seata

1、新建微服务，引入相关依赖

1、微服务pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <modules>
        <module>seata</module>
    </modules>
    <groupId>com.wind.springcloud</groupId>
    <artifactId>alibaba</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>alibaba</name>
    <description>springcloudalibaba</description>
    <packaging>pom</packaging>
    <properties>
        <java.version>1.8</java.version>
        <spring.cloud.alibaba.version>2.2.5.RELEASE</spring.cloud.alibaba.version>
        <spring.boot.version>2.3.11.RELEASE</spring.boot.version>
        <spring.cloud.version> Hoxton.SR8</spring.cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <!--        alibaba版本管理-->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring.cloud.alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--        springboot版本管理-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-parent</artifactId>
                <version>${spring.boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--        springcloud版本管理-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring.cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2、seata模块pom.xml

<?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">
    <parent>
        <artifactId>alibaba</artifactId>
        <groupId>com.wind.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.wind.springcloud</groupId>
    <artifactId>seata</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <modules>
        <module>order-seata</module>
        <module>stock-seata</module>
        <module>alibaba-order-seata</module>
        <module>alibaba-stock-seata</module>
    </modules>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.4</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.3</version>
        </dependency>
        <!-- nacos服务注册发现       -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!-- 添加openfeign的依赖-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
        </dependency>
    </dependencies>

</project>

2、子模块pom.xml

新建子模块alibaba-order-seata和alibaba-stock-seata

pom分别是

<?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">
    <parent>
        <artifactId>seata</artifactId>
        <groupId>com.wind.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>alibaba-order-seata</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>
    

</project>
<?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">
    <parent>
        <artifactId>seata</artifactId>
        <groupId>com.wind.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>alibaba-stock-seata</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>



</project>

3、子模块yml配置

分别如下，可以看到呼应上面的guangzhou配置

server:
  port: 8200
spring:
  application:
    name: order
  cloud:
    nacos:
      server-addr: 101.37.23.0:80
      discovery:
        username: nacos
        password: nacos
    alibaba:
      seata:
        tx-service-group: guangzhou
  datasource:
    username: root
    password: nymi@2023
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://101.37.23.0:3306/seata_order?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&useSSL=false&serverTimezone=Asia/Shanghai
mybatis:
  mapper-locations: classpath:/mappers/**/*Mapper.xml
seata:
  registry:
    type: nacos
    nacos:
      server-addr: 101.37.23.0:80
      application: seata-server
      username: nacos
      password: nacos
      group: SEATA_GROUP
  config:
    type: nacos
    nacos:
      server-addr: 101.37.23.0:80
      username: nacos
      password: nacos
      group: SEATA_GROUP
server:
  port: 8201

spring:
  application:
    name: stock
  cloud:
    nacos:
      server-addr: 101.37.23.0:80
      discovery:
        username: nacos
        password: nacos
    alibaba:
      seata:
        tx-service-group: guangzhou
  datasource:
    username: root
    password: nymi@2023
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://101.37.23.0:3306/seata_stock?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&useSSL=false&serverTimezone=Asia/Shanghai
mybatis:
  mapper-locations: classpath:/mappers/**/*Mapper.xml
seata:
  registry:
    type: nacos
    nacos:
      server-addr: 101.37.23.0:80
      application: seata-server
      username: nacos
      password: nacos
      group: SEATA_GROUP
  config:
    type: nacos
    nacos:
      server-addr: 101.37.23.0:80
      username: nacos
      password: nacos
      group: SEATA_GROUP

4、建立数据库

分别建立对应yml配置的数据库，

两个数据库均执行 seata\script\client\at\db中的mysql.sql的脚本

5、业务模块

1、库存服务

开发库存相关的接口

核心代码如下

分别是Stock.class


package com.wind.model;

import lombok.Data;

/**
 * @author dongguanghui
 * @date 2023/6/29 14:20
 */
@Data
public class Stock {
    private Integer id;
    private Integer productId;
    private Integer count;
}

StockServiceImpl.class

package com.wind.service.impl;

import com.wind.mapper.StockMapper;
import com.wind.service.StockService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author dongguanghui
 * @date 2023/6/29 14:19
 */
@Service
public class StockServiceImpl implements StockService {

    @Autowired
    StockMapper stockMapper;

    public void reduct(Integer productId) {
        stockMapper.reduct(productId);
        System.out.println("更新商品："+productId);
    }
}

stockMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.wind.mapper.StockMapper">

    <update id="reduct">
        update stock set `count` = `count` -1
        where product_id = #{productId}
    </update>
</mapper>

2、订单模块

实现类的方法上有全局事务的注解，启动类配置开启全局事务注解

订单模块调用库存

主要代码

OrderSeataApplication.class

package com.wind;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.Bean;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.client.RestTemplate;

/**
 * @author dongguanghui
 * @date 2023/6/29 14:17
 */
@SpringBootApplication
@EnableFeignClients
@EnableTransactionManagement
public class OrderSeataApplication {

    public static void main(String[] args) {
        SpringApplication.run(OrderSeataApplication.class,args);
    }

}

OrderController.class
package com.wind.controller;


import com.wind.model.Order;
import com.wind.service.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author dongguanghui
 * @date 2023/6/29 11:53
 */
@RestController
@RequestMapping("/order")
public class OrderController {

    @Autowired
    OrderService orderService;

    @RequestMapping("/add")
    public String add() {
        Order order = new Order();
        order.setProductId(9);
        order.setStatus(0);
        order.setTotalAmount(100);

        orderService.create(order);
        return "下单成功";
    }
}

OrderServiceImpl.class
package com.wind.service.impl;


import com.wind.api.StockService;
import com.wind.mapper.OrderMapper;
import com.wind.model.Order;
import com.wind.service.OrderService;
import io.seata.spring.annotation.GlobalTransactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;

/**
 * @author dongguanghui
 * @date 2023/6/29 14:19
 */
@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    OrderMapper orderMapper;
    @Autowired
    StockService stockService;

    @GlobalTransactional
    public Order create(Order order) {
        // 插入订单
        orderMapper.insert(order);

        // 扣减库存
        stockService.reduct(order.getProductId());
        int a=1/0;
        return order;
    }
}

Order.class
package com.wind.model;

import lombok.Data;

/**
 * @author dongguanghui
 * @date 2023/6/29 14:20
 */
@Data
public class Order {
    private Integer id;
    private Integer productId;
    private Integer status;
    private Integer totalAmount;
}

StockService.class
package com.wind.api;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

/**
 * @author dongguanghui
 * @date 2023/6/29 17:26
 */
@FeignClient(value = "stock",path = "/stock")
public interface StockService {

    @RequestMapping("/reduct")
    public String reduct(@RequestParam("productId") Integer productId);
}

OrderMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.wind.mapper.OrderMapper">

    <insert id="insert" parameterType="com.wind.model.Order">
        insert into `order` (product_id,`status`,total_amount)
        values
        (#{productId},#{status},#{totalAmount})
    </insert>
</mapper>

6、测试验证

在int a=1/0;打断点。

当执行到时，数据库将会改变数据，undo_log表会存原始数据和修改后数据的日志。

继续执行代码下一行，报错。

此时，事务回滚，回滚后undo_log数据清空。

如果int a=1/0; 改为int a=1;

则代码执行到这一行与前面一致，

继续执行下一行，正常。

此时，提交事务，undo_log数据清空。

至此，分布式事务环境搭建完毕

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