Spring Cloud系列教程七：消息总线Spring Cloud Bus（F版）

介绍

我们在Spring Cloud系列教程六：分布式配置中心Spring Cloud Config（F版）中提到客户端想要获取最新的配置需要访问/actuator/refresh，虽然我们可以用webhook简化这一流程，但是当客户端越来越多的时候，这种方案也不太合适，我们可以用Spring Cloud Bus来解决这一问题

github地址：https://github.com/erlieStar/spring-cloud-learning

实现多客户端的配置更新

复制consumer-config-cluster（spring-cloud-config ）为consumer-config-cluster-bus（spring-cloud-bus）

1.项目配置如下
pom.xml

<dependency>
	<groupId>org.springframework.cloud</groupId>
	<artifactId>spring-cloud-starter-netflix-eureka-client</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>

<dependency>
	<groupId>org.springframework.cloud</groupId>
	<artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>

bootstrap.yaml

server:
  port: 6001

spring:
  application:
    name: javashitang # 要获取的配置的应用名
  cloud:
    config:
      profile: dev
      label: master
      discovery:
        enabled: true
        service-id: config-cluster
    bus:
      enabled: true
      trace:
        enabled: true
  rabbitmq:
    host: myhost
    port: 5672
    username: guest
    password: guest

eureka:
  client:
    service-url:
      defaultZone: http://localhost:7001/eureka

management:
  endpoints:
    web:
      exposure:
        include: bus-refresh

2.启动类如下

@RefreshScope
@RestController
@EnableEurekaClient
@SpringBootApplication
public class ConsumerConfigClusterBus {

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

    @Value("${from}")
    private String from;

    @RequestMapping("from")
    public String from() {
        return this.from;
    }
}