（三）springcloud 消息总线-spring cloud bus

RabbitMQ

1、RabbitMQ环境：略

2、每个服务都添加依赖，或者聚合工程中统一添加

<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>

3、配置

每个服务增加开放监控端点，和RabbitMQ链接参数配置

spring:
    config: 
        ...
  rabbitmq:
    port: 5672
    username: jianwei
    password: 654321
    host: localhost

eureka: 
    ...

management:
  endpoints:
    web:
      exposure:
        include: "*"

或者在配置仓库增加公共配置：

# 全部开放监控端点
management:
  endpoints:
    web:
      exposure:
        include: "*"

# 链接rabbitmq
spring:
  rabbitmq:
    port: 5672
    username: jianwei
    password: 654321
    host: localhost

4、启动服务

打印日志：

这里在网上看到很多个版本，还是以控制台打印的为准

Mapped "{[/actuator/bus-env/{destination}],methods=[POST],consumes=[application/vnd.spring-boot.actuator.v2+json || application/json]}" 
Mapped "{[/actuator/bus-env],methods=[POST],consumes=[application/vnd.spring-boot.actuator.v2+json || application/json]}" 
Mapped "{[/actuator/bus-refresh],methods=[POST]}"  
Mapped "{[/actuator/bus-refresh/{destination}],methods=[POST]}" 

5、验证：

启动配置服务端和客户端并访问：http://localhost:4001/config/param

响应结果：config-client-example-value bus version0

修改配置文件：

value: config-client-example-value bus version1

向集中配置服务发送请求

POST /actuator/bus-refresh HTTP/1.1
Content-Length: 0
Host: localhost:8888
Content-Type: application/json

HTTP/1.1 204
Date: Mon, 22 Apr 2019 09:36:11 GMT

再次访问：http://localhost:4001/config/param

响应结果：config-client-example-value bus version1

6、指定配置刷新：

/actuator/bus-refresh

通配符匹配刷新：

/actuator/bus-refresh?destination=serviceName:** // 触发serviceName的所有实例