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