springcloud整合分布式事务LCN

一、创建eureka注册中心

a、pom文件

<properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </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>

b、properties文件

server.port=8761

#禁止将自己注册到注册中心
eureka.client.register-with-eureka=false
eureka.instance.hostname=localhost
eureka.client.fetch-registry=false
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/
eureka.server.enable-self-preservation=false
spring.cloud.config.discovery.enabled=true

c、在启动类上加上@EnableEurekaServer注解

@SpringBootApplication
@EnableEurekaServer
public class SpringcloudEurekaApplication {

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

}

d、启动该服务

二、创建微服务A

a、pom文件

<properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.9</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
</dependencies>

b、properties文件

spring.application.name=springcloud-aservice
server.port=8080

eureka.client.service-url.defaultZone=http://localhost:8761/eureka/

#spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.url=jdbc:mysql://localhost:3306/yzh?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true

#################jpa配置####################
spring.jpa.database=mysql
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect

c、在启动类上添加@EnableEurekaClient注解

d、创建entity

@Entity
public class Orders implements Serializable{

    private static final long serialVersionUID = 3295617400035010415L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer orderId;

    private Integer itemId;

    private Integer price;

    public Integer getOrderId() {
        return orderId;
    }

    public void setOrderId(Integer orderId) {
        this.orderId = orderId;
    }

    public Integer getItemId() {
        return itemId;
    }

    public void setItemId(Integer itemId) {
        this.itemId = itemId;
    }

    public Integer getPrice() {
        return price;
    }

    public void setPrice(Integer price) {
        this.price = price;
    }
}

e、创建dao

public interface OrderDao extends JpaRepository<Orders,Integer> {
}

f、创建service

@Service
public class OrderService {

    @Autowired
    private OrderDao orderDao;
    @Autowired
    private InventoryService inventoryService;

    @Transactional
    public Orders addOrder(){
        Orders orders = new Orders();
        orders.setItemId(100);
        orders.setPrice(2000);

        Orders save = orderDao.save(orders);

        inventoryService.updateInventory(100,9);

        return save;
    }
}

g、创建feign调用

@FeignClient(value = "springcloud-bservice",fallback = InventoryServiceFallback.class)
public interface InventoryService {

    @GetMapping(value = "updateInventory")
     Object updateInventory(@RequestParam(value = "itemId") Integer itemId,@RequestParam(value = "itemNum") Integer itemNum);

}

//回调类
public class InventoryServiceFallback implements InventoryService{
    @Override
    public Object updateInventory(Integer itemId, Integer itemNum) {
        return 0;
    }
}

h、在启动类上添加@EnableFeignClients注解

i、创建web

@RestController
public class OrdersController {

    @Autowired
    private OrderService orderService;

    @RequestMapping("/addOrders")
    public Object addOrders(){
        return orderService.addOrder();
    }
}

三、创建微服务B

a、pom文件

<properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

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

b、properties文件

spring.application.name=springcloud-bservice
server.port=8081

eureka.client.service-url.defaultZone=http://localhost:8761/eureka/

#spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.url=jdbc:mysql://localhost:3306/yzh?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true

#################jpa配置####################
spring.jpa.database=mysql
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect

c、在启动类上添加@EnableEurekaClient注解

d、创建entity

@Entity
@Table(name = "tb_inventory")
public class TbInventory implements Serializable{
    private static final long serialVersionUID = 4171468306443543867L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer inventoryId;

    private Integer itemId;

    private Integer itemnum;

    public Integer getInventoryId() {
        return inventoryId;
    }

    public void setInventoryId(Integer inventoryId) {
        this.inventoryId = inventoryId;
    }

    public Integer getItemId() {
        return itemId;
    }

    public void setItemId(Integer itemId) {
        this.itemId = itemId;
    }

    public Integer getItemnum() {
        return itemnum;
    }

    public void setItemnum(Integer itemnum) {
        this.itemnum = itemnum;
    }
}

e、创建dao

public interface TbInventoryDao extends JpaRepository<TbInventory,Integer> {
}

f、创建service

@Service
public class TbInventoryService {

    @Autowired
    private TbInventoryDao tbInventoryDao;


    @Transactional
    public TbInventory updateInventory(Integer itemId,Integer itemNum){
        TbInventory tbInventory = new TbInventory();
        tbInventory.setItemId(itemId);
        tbInventory.setItemnum(itemNum);
        TbInventory save = tbInventoryDao.save(tbInventory);
        System.err.println(1/0);
        return  save;

    }
}

g、创建web

@RestController
public class TbInventoryController {

    @Autowired
    private TbInventoryService tbInventoryService;

    @GetMapping("updateInventory")
    public Object updateInventory(@RequestParam Integer itemId, @RequestParam Integer itemNum){
        return tbInventoryService.updateInventory(itemId,itemNum);
    }
}

四、引入LCN

a、下载地址：https://github.com/codingapi/tx-lcn/releases

（此处下载的是版本5.0.2.RELEASE）

 b、将项目txlcn-tm导入idea，并修改properties文件

spring.application.name=tx-manager
server.port=7970

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/tx-manager?characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=root

mybatis.configuration.map-underscore-to-camel-case=true
mybatis.configuration.use-generated-keys=true

#tx-lcn.logger.enabled=true
# TxManager Host Ip
#tx-lcn.manager.host=127.0.0.1
# TxClient连接请求端口
#tx-lcn.manager.port=8070
# 心跳检测时间(ms)
#tx-lcn.manager.heart-time=15000
# 分布式事务执行总时间
#tx-lcn.manager.dtx-time=30000
#参数延迟删除时间单位ms
#tx-lcn.message.netty.attr-delay-time=10000
#tx-lcn.manager.concurrent-level=128
# 开启日志
#tx-lcn.logger.enabled=true
#logging.level.com.codingapi=debug
#redis 主机
#spring.redis.host=127.0.0.1
#redis 端口
#spring.redis.port=6379
#redis 密码
#spring.redis.password=

• # 给出信息都是默认值
  关于详细配置说明见TM配置

• application.properties 加载顺序如下：
  0、命令行启动参数指定
  1、file:./config/（当前jar目录下的config目录）
  2、file:./（当前jar目录）
  3、classpath:/config/（classpath下的config目录）
  4、classpath:/（classpath根目录）
  发布的二进制可执行Jar包含一个默认配置文件（也就是4），可按需要覆盖默认配置

c、创建MySQL数据库, 名称为: tx-manager、然后创建数据表

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(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;

d、将项目改造成springcloud项目，并注册到eureka中

 <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
        <spring-boot.version>2.1.7.RELEASE</spring-boot.version>
    </properties>

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <version>${spring-boot.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
            <version>${spring-boot.version}</version>
        </dependency>
 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
            <version>${spring-boot.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

注意：为了防止版本冲突需要知道springboot的版本为2.1.x，并且设置springcloud的版本为Finchley.RELEASE，还要在properties文件中新增配置：spring.cloud.compatibility-verifier.enabled=false

c、将项目注册到eureka中

eureka.client.service-url.defaultZone=http://localhost:8761/eureka/

d、在启动类上添加@EnableEurekaClient注解

五、开始整合

a、在服务A、B的pom文件中引入坐标

<dependency>
            <groupId>com.codingapi.txlcn</groupId>
            <artifactId>txlcn-tc</artifactId>
            <version>5.0.2.RELEASE</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>com.codingapi.txlcn</groupId>
            <artifactId>txlcn-txmsg-netty</artifactId>
            <version>5.0.2.RELEASE</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

注意：为了防止springboot的jar包冲突，需要将里面关于springboot的所有jar包排除掉。

b、在服务A、B的启动类上添加注解@EnableDistributedTransaction启动分布式事务

c、在服务A中的需要分布式事务方法上面添加@LcnTransaction，服务B中添加@TxcTransaction注解。

六、启动、测试

a、依次启动eureka注册中心，txlcn-tm，服务A、B

 

 b、调用服务