0071-Bus实现方式-RabbitMQ

1. 启动Rabbit队列

2. 增加Rabbit依赖

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-config</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <!--向注册中心注册-->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>
    <!--bus总线-->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-bus-amqp</artifactId>
    </dependency>
</dependencies>

3. yml配置

#####单机版Config Server 直连#######
#spring:
#  application:
#    name: config-client
#  cloud:
#    config:
#      uri: http://localhost:9800 #服务端地址
#      fail-fast: true
#      profile: dev    # 启用的profile
#      label: release1.0 # 启用的分支


#####集群版Config Server从Eureka Server获取服务#######
spring:
  application:
    name: config-client
  cloud:
    config:
      label: release1.0
      discovery:
        service-id: config-server
        enabled: true
      fail-fast: true
      profile: dev
    bus:
      enabled: true  #默认配置 可以不写
      refresh:
        enabled: true  #默认配置 可以不写
  rabbitmq:
    host: localhost  #默认配置 可以不写
    port: 5672      #默认配置 可以不写
    username: guest   #默认配置 可以不写
    password: guest   #默认配置 可以不写

eureka:
  client:
    serviceUrl:
      defaultZone: http://eureka-server-7001:7001/eureka/,http://eureka-server-7002:7002/eureka/,http://eureka-server-7003:7003/eureka/
  instance:
    instance-id: config-client-9900 # 服务名称
    prefer-ip-address: true # 显示ip地址

info: # 点击注册列表未服务出现的信息
  app.name: springcloud
  company.name: www.honor.com
  build.artifactId: @project.artifactId@
  build.version: @project.version@

management:
  endpoints:
    web:
      exposure:
        include: bus-refresh  # 开启刷新配置

3. 主启动类

@SpringBootApplication
@EnableEurekaClient
@RestController
@RefreshScope  // 总线刷新
public class ConfigClient9900Application {
    public static void main(String[] args) {
        SpringApplication.run(ConfigClient9900Application.class, args);
    }

    // 配置文件注入
    @Value("${foo}")
    private String foo;
    @Value("${label:master}")
    private String label;

    @GetMapping("/getconfig")
    public String getConfig() {
        return "Current label is " + label + ", and the foo content is " + foo + ".";
    }
}

4. 测试

1. 启动Eureka-Server
2. 启动Config-Server
3. 启动Config-client
4. 访问http://localhost:9900/getconfig出现

Current label is release1.0, and the foo content is dev foo version.

5. 修改git上配置文件
6. 使用postman或者其它工具发送

http://localhost:9900/actuator/bus-refresh

7. 再次访问http://localhost:9900/getconfig出现，配置内容发生变更，说明刷新成功

5. 配置方式

5.1 刷新在微服务上

所有的微服务应用开启Spring Cloud Bus 由其中一台服务刷新

5.2 刷新在Config Server上

所有的微服务及Config Server 开启Spring Cloud Bus，在Config Server上刷新即可

6. 刷新范围

// 刷新指定的服务及端口的微服务应用
http://localhost:9900/actuator/bus-refresh?destnation=服务名:端口

// 刷新指定的服务的所有端口微服务应用
http://localhost:9900/actuator/bus-refresh?destnation=服务名:**