SpringCloud系列(46)--SpringCloud Bus实现动态刷新全局广播

前言:上一节中我们简单的介绍了什么是SpringCloud Bus,SpringCloud Bus的用处,而本节内容则是使用SpringCloud Bus来实现动态刷新全局广播。

实现动态刷新全局广播的设计思想的架构图

注:在实现SpringCloud Bus动态刷新全局广播前需要电脑具备RabbitMQ环境,没有具备的需要先行安装

1、启动RabbitMQ

效果图:

2、查看RabbitMQ是否正常运行

在浏览器输入http://localhost:15672/进入RabbitMQ的可视化界面,然后登录进去(默认账号密码guest/guest)

效果图:

3、创建一个客户端模块,命名为cloud-config-client-3366
(1)在父工程下新建模块
(2)选择模块的项目类型为Maven并选择模块要使用的JDK版本
(3)填写子模块的名称,然后点完成即可完成创建

效果图:

(4)修改cloud-config-client-3355子模块的pom.xml文件,然后reolad一下,下载依赖

例:

XML 复制代码
<?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">
    <parent>
        <artifactId>springcloud01</artifactId>
        <groupId>com.ken.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-config-client-3366</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!--以下依赖都没写版本号,没写版本号的情况下会引用父项目的版本-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--监控-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <!--lombok插件-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--Eureka Clinet-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
    </dependencies>

</project>
(5)为子模块添加名为bootstrap的yml配置文件

注:application.yml是用户级资源配置项,bootstrap.yml是系统级,bootstrap.yml优先级更高,Spring Cloud会创建一个BootstrapContext,作为Spring应用的Application Context的父上下文。初始化的时候,BootstrapContext负责从外部源加载配置属性并解析配置。这两个上下文共享一个从外部获取的Environment。Bootstrap属性有高优先级,默认情况下,它们不会被本地配置覆盖。Bootstrap context和Application Context有着不同的约定,所以新增了一个bootstrap.yml文件,保证`Bootstrap Context和Application Context配置的分离。要将Client模块下的application.yml文件改为bootstrap.yml,这是很关键的,因为bootstrap.yml是比application.yml先加载的。bootstrap.yml优先级高于application.yml

效果图:

(6)修改bootstrap.yml文件配置
bash 复制代码
server:
  port: 3366

spring:
  application:
    name: config-client
  cloud:
    #config客户端配置(下述4个配置综合起来,意思是读取http://localhost:3344地址里的master分支里的config-dev.ymL配置文件,即读取http://config-3344.com:3344/master/config-dev.yml
    config:
      #分支名称
      label: master
      #配置文件名称
      name: config
      #读取后缀名称
      profile: dev
      #配置中心地址
      uri: http://localhost:3344

#服务注册到eureka地址
eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka/

#暴露监控的端口
management:
  endpoints:
    web:
      exposure:
        include: "*"
(7)为cloud-config-client-3366子模块新建一个主启动类,类名输入com.ken.springcloud.ConfigClientMain3366,然后创建即可

效果图:

(8)编写ConfigClientMain3366主启动类
java 复制代码
package com.ken.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

@EnableEurekaClient
@SpringBootApplication
public class ConfigClientMain3366 {

    public static void main(String[] args) {
        SpringApplication.run(ConfigClientMain3366.class, args);
    }

}
4、在com.ken.springcloud包下新建一个名为controller的包

效果图:

5、在controller包下新建一个名为ConfigClientController的控制类

效果图:

6、修改cloud-config-center-3344子模块的pom.xml文件,然后reolad一下,下载依赖

例:

XML 复制代码
<?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">
    <parent>
        <artifactId>springcloud01</artifactId>
        <groupId>com.ken.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-config-center-3344</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
        <!--以下依赖都没写版本号,没写版本号的情况下会引用父项目的版本-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--监控-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <!--lombok插件-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--Eureka Clinet-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!--添加消息总线RabbitM!支持-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>
    </dependencies>

</project>
7、修改cloud-config-center-3344子模块的application.yml文件配置

例:

XML 复制代码
server:
  port: 3344

spring:
  application:
    #注册进Eureka的微服务名称
    name: cloud-config-center
  cloud:
    config:
      server:
        git:
          #仓库路径地址
          uri: https://gitee.com/用户名/springcloud-config.git
          #搜索目录
          search-paths:
            - springcloud-config
          #跳过ssl验证
          skip-ssl-validation: true
          #如果是github的就填github的,如果仓库是公开的,这里不用填
          username: 这里填你gitee的账号
          #如果是github的就填github的,如果仓库是公开的,这里不用填
          password: 这里填你gitee的密码
      #读取分支
      label: master

#rabbitmq相关配置
rabbitmq:
    host: localhost
    port: 5672
    username: guest
    password: guest

#rabbitmq相关配置,暴露bus刷新配置的端点
management:
  #暴露bus刷新配置的端点
  endpoints:
    web:
      exposure:
        include: 'bus-refresh'

eureka:
  client:
    #表示是否将自己注册进Eureka Server里,默认为true
    register-with-eureka: false
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka/
8、修改cloud-config-client-3355子模块的pom.xml文件,然后reolad一下,下载依赖

例:

XML 复制代码
<?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">
    <parent>
        <artifactId>springcloud01</artifactId>
        <groupId>com.ken.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-config-client-3355</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!--以下依赖都没写版本号,没写版本号的情况下会引用父项目的版本-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--监控-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <!--lombok插件-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--Eureka Clinet-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!--添加消息总线RabbitM!支持-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>
    </dependencies>

</project>
9、修改cloud-config-client-3355子模块的bootstrap.yml文件配置

例:

bash 复制代码
server:
  port: 3355

spring:
  application:
    name: config-client
  cloud:
    #config客户端配置(下述4个配置综合起来,意思是读取http://localhost:3344地址里的master分支里的config-dev.ymL配置文件,即读取http://config-3344.com:3344/master/config-dev.yml
    config:
      #分支名称
      label: master
      #配置文件名称
      name: config
      #读取后缀名称
      profile: dev
      #配置中心地址
      uri: http://localhost:3344

#rabbitmq相关配置
rabbitmq:
  host: localhost
  port: 5672
  username: guest
  password: guest

#服务注册到eureka地址
eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka/

#暴露监控的端口
management:
  endpoints:
    web:
      exposure:
        include: "*"
10、修改cloud-config-client-3366子模块的pom.xml文件,然后reolad一下,下载依赖

例:

XML 复制代码
<?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">
    <parent>
        <artifactId>springcloud01</artifactId>
        <groupId>com.ken.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-config-client-3366</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!--以下依赖都没写版本号,没写版本号的情况下会引用父项目的版本-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--监控-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <!--lombok插件-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--Eureka Clinet-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!--添加消息总线RabbitM!支持-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>
    </dependencies>

</project>
11、修改cloud-config-client-3366子模块的bootstrap.yml文件配置
bash 复制代码
server:
  port: 3366

spring:
  application:
    name: config-client
  cloud:
    #config客户端配置(下述4个配置综合起来,意思是读取http://localhost:3344地址里的master分支里的config-dev.ymL配置文件,即读取http://config-3344.com:3344/master/config-dev.yml
    config:
      #分支名称
      label: master
      #配置文件名称
      name: config
      #读取后缀名称
      profile: dev
      #配置中心地址
      uri: http://localhost:3344

#rabbitmq相关配置
rabbitmq:
  host: localhost
  port: 5672
  username: guest
  password: guest

#服务注册到eureka地址
eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka/

#暴露监控的端口
management:
  endpoints:
    web:
      exposure:
        include: "*"
12、分别启动eureka-server7001、cloud-config-center-3344、cloud-config-client-3355、cloud-config-client-3366服务

效果图:

13、在浏览器分别输入http://config-3344.com:3344/master/config-dev.ymlhttp://localhost:3355/configInfohttp://localhost:3366/configInfo,测试配置中心3344是否能成功从gitee上成功取得配置内容,测试客户端3355、3366是否能通过配置中心从gitee上成功取得配置内容

效果图:

gitee上config-dev.yml的配置内容

配置中心3344成功从gitee上成功取得配置内容

客户端3355成功通过配置中心从gitee上成功取得配置内容

客户端3366成功通过配置中心从gitee上成功取得配置内容

14、修改远程仓库上config-dev.yml配置文件的内容
(1)修改远程仓库上config-dev.yml配置文件的内容,我这里把version改为3
(2)提交修改
15、在命令行输入以下命令,然后按回车进行请求,对cloud-config-center-3344服务发送请求让3344服务进行刷新的操作
bash 复制代码
curl -X POST "http://localhost:3344/actuator/bus-refresh"

效果图:

16、验证是否成功实现动态刷新全局广播

重新在浏览器上请求http://config-3344.com:3344/master/config-dev.yml接口,SpringCloud Config服务端这时候能获取到最新的配置

重新在浏览器上请求接口,发现SpringCloud Config3355客户端这时候能通过服务端获取到最新的配置

重新在浏览器上请求http://localhost:3366/configInfo接口,发现SpringCloud Config3366客户端这时候能通过服务端获取到最新的配置

由上述结果可以看出我们成功的实现了只要刷新SpringCloud Config服务端,就会动态刷新全局SpringCloud Config客户端使客户端动态获取远程仓库上最新配置文件内容的效果