springcloud整合LCN分布式事务

深碍√TFBOYSˉ_ 2022-02-14 19:36 347阅读 0赞

开发工具idea、jdk8，redis、maven

首先用idea搭建eureka-server

配置文件：

server.port=8761
    
    eureka.instance.hostname=127.0.0.1
    eureka.instance.prefer-ip-address=true
    
    eureka.client.serviceUrl.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/
    eureka.client.registerWithEureka=false
    eureka.client.fetchRegistry=false

启动eureka-server

然后下载tx-lcn事务[lcn4.1.0下载][lcn4.1.0]，选择-sprinfboot2.0.x分支进行下载![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwcmluZ2RhdGFf_size_16_color_FFFFFF_t_70][]

项目目录入上图，将该项目整体进行打包安装到maven本地仓库![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwcmluZ2RhdGFf_size_16_color_FFFFFF_t_70 1][]

找到刚下载的项目位置，进入到如图的目录文件夹内，按住ctrl+shift+鼠标右键  选择命令窗口，运行mvn package （maven环境变量要配置，否则找不到命令）这时maven会生成4.2.0版本的lcn

创建两个服务A，事务发起方

配置文件如下

eureka.client.serviceUrl.defaultZone= http://127.0.0.1:8761/eureka/
    server.port= 8088
    spring.application.name=service-hi
    eureka.client.registerWithEureka=true
    eureka.client.fetchRegistry=true
    
    spring.thymeleaf.cache=false
    spring.thymeleaf.enabled=false
    spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
    spring.datasource.url=jdbc:mysql://localhost:3306/work?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&serverTimezone=GMT%2B8
    spring.datasource.username=root
    spring.datasource.password=123456
    
    spring.datasource.initialSize=5
    spring.datasource.minIdle=5
    spring.datasource.maxActive=20
    
    spring.datasource.maxWait=60000
    
    spring.datasource.timeBetweenEvictionRunsMillis=60000
    
    spring.datasource.minEvictableIdleTimeMillis=300000
    spring.datasource.validationQuery=SELECT 1 FROM DUAL
    spring.datasource.testWhileIdle=true
    spring.datasource.testOnBorrow=false
    spring.datasource.testOnReturn=false
    
    spring.datasource.poolPreparedStatements=true
    spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
    
    spring.datasource.filters=stat,wall,log4j
    
    mybatis.mapper-locations=classpath:mapper/*.xml
    
    
    
    #Ribbon的负载均衡策略
    ribbon.NFLoadBalancerRuleClassName=com.netflix.loadbalancer.RandomRule
    ribbon.MaxAutoRetriesNextServer=0
    
    
    #txmanager地址
    tm.manager.url=http://127.0.0.1:9010/tx/manager/
    
    logging.level.com.codingapi=debug

tm.manager.url为事务协调者服务的url

<?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>2.1.4.RELEASE</version>
            <relativePath/> 
        </parent>
        <groupId>com.example</groupId>
        <artifactId>service1</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>service1</name>
        <description>Demo project for Spring Boot</description>
    
        <properties>
            <java.version>1.8</java.version>
            <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
            <lcn.last.version>4.2.0</lcn.last.version>
        </properties>
    
        <dependencies>
            <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>2.0.1</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>com.codingapi</groupId>
                <artifactId>tx-client</artifactId>
                <version>${lcn.last.version}</version>
                <exclusions>
                    <exclusion>
                        <groupId>org.slf4j</groupId>
                        <artifactId>*</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>com.codingapi</groupId>
                <artifactId>transaction-springcloud</artifactId>
                <version>${lcn.last.version}</version>
                <exclusions>
                    <exclusion>
                        <groupId>org.slf4j</groupId>
                        <artifactId>*</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
    
            <dependency>
                <groupId>com.codingapi</groupId>
                <artifactId>tx-plugins-db</artifactId>
                <version>${lcn.last.version}</version>
                <exclusions>
                    <exclusion>
                        <groupId>org.slf4j</groupId>
                        <artifactId>*</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
    
    
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <scope>runtime</scope>
            </dependency>
            <dependency>
                <groupId>com.github.pagehelper</groupId>
                <artifactId>pagehelper</artifactId>
                <version>5.1.8</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <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>

启动类，@EnableFeignClients注解一定要加扫描com.codingapi.tx包，否则因扫描不到jar内的feignclient导致报错

@SpringBootApplication
    @EnableEurekaClient
    @EnableCircuitBreaker
    @EnableFeignClients(basePackages = {"com.example.service1.client","com.codingapi.tx"})
    @MapperScan("com.example.service1.dao")
    public class Service1Application {
    
        public static void main(String[] args) {
            SpringApplication.run(Service1Application.class, args);
        }
    
    }

@Autowired
        private com.example.service1.client.TbUserService userService;
    
    
        /**
         * 通过主键删除数据
         *
         * @param id 主键
         * @return 是否成功
         */
        @TxTransaction(isStart = true)
        @Transactional(rollbackFor = Exception.class)
        @Override
        public boolean deleteById(String id,String exFlag) {
            int i = tbUserDao.deleteById(id);
            Result del = userService.del("2");
            int a = 1/0;
            return  true;
        }

@FeignClient(value = "service-hi2",fallback = TbUserServiceImpl.class)
    public interface TbUserService {
    
        @RequestMapping(value = "/tbUser/del")
        public Result del(String id);
    
        @RequestMapping(value = "/tbUser/update")
        public Result update(@RequestBody TbUserDTO userDTO);
    }
    
    class TbUserServiceImpl implements TbUserService{
    
        @Override
        public Result del(String id) {
            return Result.error(10001,"请稍后重试");
        }
    
        @Override
        public Result update(TbUserDTO userDTO) {
            return Result.error(10001,"请稍后重试");
        }
    }

服务B，事务参与方

配置文件

eureka.client.serviceUrl.defaultZone= http://127.0.0.1:8761/eureka/
    server.port= 8089
    spring.application.name=service-hi2
    eureka.client.registerWithEureka=true
    eureka.client.fetchRegistry=true
    
    feign.hystrix.enabled=true
    
    spring.thymeleaf.cache=false
    spring.thymeleaf.enabled=false
    spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
    spring.datasource.url=jdbc:mysql://localhost:3306/work?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&serverTimezone=GMT%2B8
    spring.datasource.username=root
    spring.datasource.password=123456
    
    spring.datasource.initialSize=5
    spring.datasource.minIdle=5
    spring.datasource.maxActive=20
    
    spring.datasource.maxWait=60000
    
    spring.datasource.timeBetweenEvictionRunsMillis=60000
    
    spring.datasource.minEvictableIdleTimeMillis=300000
    spring.datasource.validationQuery=SELECT 1 FROM DUAL
    spring.datasource.testWhileIdle=true
    spring.datasource.testOnBorrow=false
    spring.datasource.testOnReturn=false
    
    spring.datasource.poolPreparedStatements=true
    spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
    
    spring.datasource.filters=stat,wall,log4j
    
    mybatis.mapper-locations=classpath:mapper/*.xml
    
    
    #Ribbon的负载均衡策略
    ribbon.NFLoadBalancerRuleClassName=com.netflix.loadbalancer.RandomRule
    ribbon.MaxAutoRetriesNextServer=0
    
    
    #txmanager地址
    tm.manager.url=http://127.0.0.1:9010/tx/manager/
    
    logging.level.com.codingapi=debug

pom文件同serviceA的pom文件

main方法

@SpringBootApplication
    @EnableEurekaClient
    @EnableCircuitBreaker
    @EnableFeignClients(basePackages = {"com.example.service1.client","com.codingapi.tx"})
    @MapperScan("com.example.service2.dao")
    public class Service2Application {
    
        public static void main(String[] args) {
            SpringApplication.run(Service2Application.class, args);
        }
    
    }

feign调用http接口

/**
         * 删除
         * @param id
         * @return
         */
        @RequestMapping("/del")
        @ResponseBody
        public Result del(String id){
            try {
                tbUserService.deleteById("2");
            }catch (Exception e){
                return  Result.ok(10001,"系统错误");
            }
    
            return Result.ok();
        }

service：

*/
        @TxTransaction
        @Transactional(rollbackFor = Exception.class)
        @Override
        public boolean deleteById(String id) {
            return tbUserDao.deleteById(id) > 0;
        }

两个服务都配置好了，然后启动事务协调者，第一张图的tx-manager项目，启动成功后可以测试

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwcmluZ2RhdGFf_size_16_color_FFFFFF_t_70 2][]

结果，成功

![20190426142322235.png][]

两条数据都正常存在

eureka源码 ：git@gitlab.com:boss\_along/lcn-eureka.git

serviceA服务发起方git@gitlab.com:boss\_along/lcn-service-a.git

serviceB服务参与方 git@gitlab.com:boss\_along/lcn-service-b.git

[lcn4.1.0]: https://github.com/codingapi/tx-lcn/tree/v4.1.0
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwcmluZ2RhdGFf_size_16_color_FFFFFF_t_70]: /images/20220214/ba25ba10b6a942a5a0f010122332fe53.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwcmluZ2RhdGFf_size_16_color_FFFFFF_t_70 1]: /images/20220214/9e7882a69e8a4909a7e1624e657c2f15.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NwcmluZ2RhdGFf_size_16_color_FFFFFF_t_70 2]: /images/20220214/a0ef5863ad804d05825e568eb0d47422.png
[20190426142322235.png]: /images/20220214/d7d9c3639bf14d76be2a7a5d45afe1d7.png