springcloud微服务（八）-Eureka客户端的支付微服务集群

迷南。 2023-10-06 20:47 10阅读 0赞

支付微服务集群，我们新增一个module spring-cloud-payment8002，

## 一、创建module ##

参考cloud-provide-payment8001构建spring-cloud-payment8002。

## 二、pom文件 ##

<dependencies>
            <dependency>
                <groupId>otc.orientsec</groupId>
                <artifactId>cloud-api-commons</artifactId>
                <version>1.0-SNAPSHOT</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>1.1.14</version>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-jdbc</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <scope>runtime</scope>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>
        </dependencies>

## 三、yml文件 ##

server:
      port: 8002
    
    spring:
      application:
        name: cloud-payment-service
    
      datasource:
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        url: jdbc:mysql://localhost:3306/ssm_crud?serverTimezone=UTC&useUnicode=true&characterEncoding=UTF-8
        username: root
        password: xxxxxxxxx
    
    mybatis:
      type-aliases-package: com.atorientsec.springcloud.entities
      mapper-locations: classpath:mapper/*.xml
    
    eureka:
      client:
        #表示是否将自己注册进eurekaServer，默认为true
        register-with-eureka: true
        #是否从EurekaServer抓取已有的注册信息，默认为true，单节点无所谓，集群必须设置为true，才能配合ribbon使用负载均衡
        fetch-registry: true
        service-url:
          defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/
    
      instance:
        instance-id: payment8002

## 四、主启动类 ##

@SpringBootApplication
    @EnableEurekaClient
    public class PaymentMain8002 {
        public static void main(String[] args)
        {
            SpringApplication.run(PaymentMain8002.class,args);
        }
    }

## 五、业务类(参考8001) ##

## 六、服务端做负载均衡 ##

当消费端向服务端发起请求时，服务端是服务集群，所以请求的URL应是服务端注册在Eureka上的服务名，而不是具体的某一个http。故OrderController需要做修改。

![watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA6Iqx5p6c5rC06I6y_size_20_color_FFFFFF_t_70_g_se_x_16][]

## 七、RestTemplate 也需要使用@LoadBalanced注解赋予RestTemplate负载均衡的能力 ##

@Configuration
    public class ApplicationConfig {
        @Bean
        @LoadBalanced  //使用@LoadBalanced注解赋予RestTemplate负载均衡的能力
        public RestTemplate getRestTemplate()
        {
            return new RestTemplate();
        }
    }

## 八、测试负载均衡 ##

![fd7784005e5e4955847ba43109f4523e.png][]

![2e9fd0fd73b54618a613572e65409d2f.png][]

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[fd7784005e5e4955847ba43109f4523e.png]: https://img-blog.csdnimg.cn/fd7784005e5e4955847ba43109f4523e.png
[2e9fd0fd73b54618a613572e65409d2f.png]: https://img-blog.csdnimg.cn/2e9fd0fd73b54618a613572e65409d2f.png