nacos+gateway+seata集成

一、naocs

1、nacos下载及启动

	1.1、[nacos官方文档](https://nacos.io/zh-cn/docs/quick-start.html)
	1.2、[nacos下载地址](https://github.com/alibaba/nacos/releases)
	1.3、进入到bin目录，打开 start.cmd 文件,将set MODE="cluster"改为set MODE=“sandalone”（将集群启动改为单实例启动）
	1.4、新建nacos数据库，导入sql文件（conf/nacos-mysql.sql）
	1.5、打开nacos文件下的 /conf/application.properties，配置数据库地址等
	1.6、访问nacos，默认地址：http://localhost:8848/nacos，账户名密码为：   nacos/nacos

2、nacos客户端配置（配置中心）

2.1 父工程pom.xml文件

<?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>
    <groupId>com.ishz.web</groupId>
    <artifactId>springcloud</artifactId>
    <version>1.0-SNAPSHOT</version>

    <modules>
        <module>gateway</module>
        <module>authentication</module>
    </modules>

    <packaging>pom</packaging>

    <properties>
        <!-- 编码 -->
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <!-- jdk -->
        <java.version>1.8</java.version>
        <common-version>0.0.1-SNAPSHOT</common-version>
        <ishz.version>3.5.0</ishz.version>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.6.6</spring-boot.version>
        <spring-cloud.version>2021.0.1</spring-cloud.version>
        <spring-cloud-alibaba.version>2021.1</spring-cloud-alibaba.version>
        <alibaba.nacos.version>2.0.4</alibaba.nacos.version>
        <spring-boot-admin.version>2.6.6</spring-boot-admin.version>
        <spring-boot.mybatis>2.2.2</spring-boot.mybatis>
        <swagger.fox.version>3.0.0</swagger.fox.version>
        <swagger.core.version>1.6.2</swagger.core.version>
    </properties>

    <dependencyManagement>
        <dependencies>

            <!-- SpringCloud 微服务 -->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!-- SpringCloud Alibaba 微服务 -->
            <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>

            <!-- Alibaba Nacos 配置 -->
            <dependency>
                <groupId>com.alibaba.nacos</groupId>
                <artifactId>nacos-client</artifactId>
                <version>${alibaba.nacos.version}</version>
            </dependency>

            <!-- SpringBoot 依赖配置 -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!--  SpringBoot 监控客户端 -->
            <dependency>
                <groupId>de.codecentric</groupId>
                <artifactId>spring-boot-admin-starter-client</artifactId>
                <version>${spring-boot-admin.version}</version>
            </dependency>

            <!-- Mybatis 依赖配置 -->
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>${spring-boot.mybatis}</version>
            </dependency>

            <!-- Swagger 依赖配置 -->
            <dependency>
                <groupId>io.swagger</groupId>
                <artifactId>swagger-models</artifactId>
                <version>${swagger.core.version}</version>
            </dependency>
            <dependency>
                <groupId>io.swagger</groupId>
                <artifactId>swagger-annotations</artifactId>
                <version>${swagger.core.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- bootstrap 启动器 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bootstrap</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                    <encoding>${project.build.sourceEncoding}</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2.2子工程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>
    <parent>
        <groupId>com.ishz.web</groupId>
        <artifactId>springcloud</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <groupId>com.ishz.web</groupId>
    <artifactId>authentication</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>authentication</name>
    <description>Demo project for Spring Boot</description>

    <!-- 打包方式 -->
    <packaging>jar</packaging>

    <repositories>
        <repository>
            <id>getui-nexus</id>
            <url>http://mvn.gt.getui.com/nexus/content/repositories/releases/</url>
        </repository>
        <repository>
            <id>maven_group</id>
            <name>maven_group</name>
            <url>http://www.nexus.dev.com/repository/maven_group/</url>
        </repository>
    </repositories>

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

        <dependency>
            <groupId>com.ishz.web</groupId>
            <artifactId>common</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-starter-config</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-starter-bus-kafka</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-actuator</artifactId>
                </exclusion>
                <exclusion>
                    <artifactId>guava</artifactId>
                    <groupId>com.google.guava</groupId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- springcloud alibaba nacos discovery -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <!-- springcloud loadbalancer -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-loadbalancer</artifactId>
        </dependency>

        <!-- SpringBoot Web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </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>

    <!--分发管理-->
    <distributionManagement>
        <!--RELEASE-->
        <repository>
            <id>maven_pro</id>
            <name>maven_pro</name>
            <url>http://www.nexus.dev.com/repository/maven_pro/</url>
        </repository>
        <!--snapshot-->
        <snapshotRepository>
            <id>maven_dev</id>
            <name>maven_dev</name>
            <url>http://www.nexus.dev.com/repository/maven_dev/</url>
        </snapshotRepository>
    </distributionManagement>
</project>

2.3 客户端bootstrap.yml配置文件

server:
  port: 9000
# Spring

spring:
  application:
    # 应用名称
    name: service-authentication
  profiles:
    # 环境配置
    active: local
  mvc:
    pathmatch:
      matching-strategy: ANT_PATH_MATCHER
  main:
    allow-circular-references: true
    allow-bean-definition-overriding: true
  cloud:
    nacos:
      discovery:
        # 服务注册地址
        server-addr: 127.0.0.1:8848
      config:
        enabled: true
        # 配置中心地址
        server-addr: localhost:8848
        # 配置文件格式
        file-extension: yaml
        prefix: ${spring.application.name}
#        namespace: 8f6fc5c3-f6fd-43f4-ab3b-ca396ee9928f
#        group: DEFAULT_GROUP
        # 共享配置
        shared-configs[0]:
          data-id: security-local.yaml
        shared-configs[1]:
          data-id: datasource-local.yaml
        shared-configs[2]:
          data-id: security-local.yaml
        shared-configs[3]:
          data-id: network-local.yaml
        shared-configs[4]:
          data-id: redis-local.yaml
        shared-configs[5]:
          data-id: seata-local.yaml

2.4 nacos配置中心文件

2.4 nacos dataId命名规则
在 Nacos Spring Cloud 中，dataId 的完整格式如下：

${prefix}-${spring.profiles.active}.${file-extension}

prefix 默认为 spring.application.name 的值，也可以通过配置项 spring.cloud.nacos.config.prefix来配置。
spring.profiles.active 即为当前环境对应的 profile，详情可以参考 Spring Boot文档。 注意：当 spring.profiles.active 为空时，对应的连接符 - 也将不存在，dataId 的拼接格式变成 $prefix.${file-extension}
file-exetension 为配置内容的数据格式，可以通过配置项 spring.cloud.nacos.config.file-extension 来配置。目前只支持 properties 和 yaml 类型。

二、gateway

1、pom.xml文件

<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>
        <groupId>com.ishz.web</groupId>
        <artifactId>springcloud</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.ishz.web</groupId>
    <artifactId>gateway</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gateway</name>

    <description>
        gateway网关模块
    </description>

    <dependencies>
        <!-- SpringCloud Gateway -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>

        <!-- SpringCloud Alibaba Nacos -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <!-- SpringCloud Alibaba Nacos Config -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>

        <!-- SpringCloud Alibaba Sentinel -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>

        <!-- SpringCloud Alibaba Sentinel Gateway -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-sentinel-gateway</artifactId>
        </dependency>

        <!-- Sentinel Datasource Nacos -->
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>

        <!-- SpringBoot Actuator -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        
        <!-- SpringCloud Loadbalancer -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-loadbalancer</artifactId>
        </dependency>

        <!-- Apache Lang3 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>

        <!-- Swagger -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>${swagger.fox.version}</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>${swagger.fox.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

        <!-- Java Servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
        </dependency>
    </dependencies>

    <build>
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

2、 bootstrap.yml配置文件

# Tomcat
security:
  ignore:
    whites: /**/v2/api-docs,/**/v3/api-docs,/**/oauth/token,/**/tenant,/**/oauth/check_token

#server:
#  port: 8080

# Spring
spring:
  application:
    # 应用名称
    name: gateway
  profiles:
    # 环境配置
    active: local
  main:
    allow-circular-references: true
    allow-bean-definition-overriding: true
  mvc:
    pathmatch:
      matching-strategy: ANT_PATH_MATCHER
  cloud:
    nacos:
      discovery:
        # 服务注册地址
        server-addr: 127.0.0.1:8848
      config:
        enabled: true
        # 配置中心地址
        server-addr: localhost:8848
#        prefix: ${spring.application.name}
        # 配置文件格式
        file-extension: yaml
#        namespace: 8f6fc5c3-f6fd-43f4-ab3b-ca396ee9928f
#        group: DEFAULT_GROUP
        # 共享配置
#        shared-configs:
#          - application-${spring.profiles.active}.${spring.cloud.nacos.config.file-extension}
    sentinel:
      # 取消控制台懒加载
      eager: true
      transport:
        # 控制台地址
        dashboard: 127.0.0.1:8718
      # nacos配置持久化
      datasource:
        ds1:
          nacos:
            server-addr: 127.0.0.1:8848
            dataId: sentinel-ruoyi-gateway
            groupId: DEFAULT_GROUP
            data-type: json
            rule-type: flow
    gateway:
      globalcors:
        add-to-simple-url-handler-mapping: true
        cors-configurations:
          '[/**]':
            allowedOriginPatterns: "*"
            allowed-methods: "*"
            allowed-headers: "*"
            allow-credentials: true
            exposedHeaders: "Content-Disposition,Content-Type,Cache-Control"
#      default-filters:
#        - DedupeResponseHeader=Access-Control-Allow-Origin Access-Control-Allow-Credentials Vary, RETAIN_UNIQUE
#      routes:
#        # 认证中心
#        - id: service-authentication
#          uri: lb://service-authentication
#          predicates:
#            - Path=/service-authentication/**
#          filters:
#            - StripPrefix=1

3、 nacos中的配置文件（动态路由）

server:
  port: 8080
spring:
  cloud:
    gateway:
      routes:
        # 认证中心
        - id: service-authentication
          uri: lb://service-authentication
          predicates:
            - Path=/service-authentication/**
          filters:
            - StripPrefix=1
        - id: service-position-data
          uri: lb://service-position-data
          predicates:
            - Path=/service-position-data/**
          filters:
            - StripPrefix=1

三、seata

1、seata下载与安装

1.1seata-server下载地址
1.2 修改registry.conf
1.3 将配置导入nacos
1.3.1 创建并修改config.text
config.text下载地址
修改文件内容：

	store.mode=db
  	store.db.datasource=druid
    store.db.dbType=mysql
    store.db.driverClassName=com.mysql.cj.jdbc.Driver
    store.db.url=jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true&rewriteBatchedStatements=true
    store.db.user=root
    store.db.password=root

将修改后的 config.text 放入seata-server的根目录

nacos-config.sh下载地址
将下载后的nacos-config.sh放入seata的conf目录

使用git执行导入命令: sh nacos-config.sh -h localhost -p 8848 -g SEATA_GROUP -t 0af6e97b-a684-4647-b696-7c6d42aecce7 -u nacos -w nacos
命令解析：-h -p 指定nacos的端口地址；-g 指定配置的分组，注意，是配置的分组；-t 指定命名空间id； -u -w指定nacos的用户名和密码，同样，这里开启了nacos注册和配置认证的才需要指定

2、项目配置

1、pom.xml中新增

 <!-- SpringBoot Seata -->
        <dependency>
            <groupId>io.seata</groupId>
            <artifactId>seata-spring-boot-starter</artifactId>
            <version>1.4.0</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
            <version>2021.1</version>
        </dependency>

2、配置yml文件

seata:
  enabled: true
  enable-auto-data-source-proxy: false
  #  application-id: vforumc-user
  tx-service-group: default_tx_group
  service:
    vgroup-mapping:
      default_tx_group: default
    grouplist:
      seata-server: 127.0.0.1:8091
    disable-global-transaction: false
  registry:
    type: nacos
    nacos:
      application: seata-server
      server-addr: 127.0.0.1:8848
      namespace: 790b7580-764e-42c9-84c8-40f5c7ea2aec
      group: SEATA_GROUP
      username: nacos
      password: nacos
  config:
    nacos:
      server-addr: 127.0.0.1:8848
      namespace: 790b7580-764e-42c9-84c8-40f5c7ea2aec
      group: SEATA_GROUP
      username: nacos
      password: nacos

3、启动类加注解@EnableAutoDataSourceProxy
4、在需要事务管理的方法上添加 @GlobalTransaction 注解 开启全局事务
5、全局异常拦截处理
在服务A调用服务B时，服务A抛异常可正常回滚；服务B抛异常时，无法进行回滚。解决方法是在服务B加上下面的方法

package com.ishz.web.common.exception;

import io.seata.core.context.RootContext;
import io.seata.core.exception.TransactionException;
import io.seata.tm.api.GlobalTransaction;
import io.seata.tm.api.GlobalTransactionContext;
import org.apache.commons.lang3.StringUtils;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;

/**
 * @author yaojiaxin
 * @description 分布式事务feign全局异常处理，A服务调B服务接口时，
 * B服务在有全局异常拦截的情况下抛错，seata不会进行回滚，此类用于解决此问题
 * 官方解决方案：https://seata.io/zh-cn/blog/seata-spring-boot-aop-aspectj.html
 * @date 2022/5/12 10:26
 */
@Aspect
@Component
public class SeataAspect {

    private final static Logger logger = LoggerFactory.getLogger(SeataAspect.class);

    @Before("execution(* com.ishz.web.*.service.*.*(..))")
    public void before(JoinPoint joinPoint) throws TransactionException {
        MethodSignature signature = (MethodSignature)joinPoint.getSignature();
        Method method = signature.getMethod();
        System.out.println("拦截到需要分布式事务的方法," + method.getName());
        // 此处可用redis或者定时任务来获取一个key判断是否需要关闭分布式事务
        // 模拟动态关闭分布式事务
//        if ((int)(Math.random() * 100) % 2 == 0) {
            GlobalTransaction tx = GlobalTransactionContext.getCurrentOrCreate();
            tx.begin(300000, "test-client");
//        } else {
//            System.out.println("关闭分布式事务");
//        }
    }

    @AfterThrowing(throwing = "e", pointcut = "execution(* com.ishz.web.*.service.*.*(..))")
    public void doRecoveryActions(Throwable e) throws TransactionException {
        System.out.println("方法执行异常:{}"+ e.getMessage());
        if (!StringUtils.isBlank(RootContext.getXID()))
            GlobalTransactionContext.reload(RootContext.getXID()).rollback();
    }

//    @AfterReturning(value = "execution(* com.ishz.web.*.service.*.*(..))", returning = "result")
//    public void afterReturning(JoinPoint point, Object result) throws TransactionException {
            //result返回值类型需要修改
//        System.out.println("方法执行结束:{}"+result);
//        if ((Boolean)result) {
//            if (!StringUtils.isBlank(RootContext.getXID())) {
//                System.out.println("分布式事务Id:{}"+ RootContext.getXID());
//                GlobalTransactionContext.reload(RootContext.getXID()).commit();
//            }
//        }
//    }

}