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 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
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
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 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:
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 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:
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 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
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.yml、http://localhost:3355/configInfo、http://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
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