前言:上一節中我們簡單的介紹了什么是SpringCloud Bus,SpringCloud Bus的用處,而本節內容則是使用SpringCloud Bus來實現動態刷新全局廣播。
實現動態刷新全局廣播的設計思想的架構圖
注:在實現SpringCloud Bus動態刷新全局廣播前需要電腦具備RabbitMQ環境,沒有具備的需要先行安裝
1、啟動RabbitMQ
效果圖:
2、查看RabbitMQ是否正常運行
在瀏覽器輸入http://localhost:15672/進入RabbitMQ的可視化界面,然后登錄進去(默認賬號密碼guest/guest)
效果圖:
3、創建一個客戶端模塊,命名為cloud-config-client-3366
(1)在父工程下新建模塊
?(2)選擇模塊的項目類型為Maven并選擇模塊要使用的JDK版本
(3)填寫子模塊的名稱,然后點完成即可完成創建
效果圖:
(4)修改cloud-config-client-3355子模塊的pom.xml文件,然后reolad一下,下載依賴
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><!--以下依賴都沒寫版本號,沒寫版本號的情況下會引用父項目的版本--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!--監控--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--熱部署--><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)為子模塊添加名為bootstrap的yml配置文件
注:application.yml是用戶級資源配置項,bootstrap.yml是系統級,bootstrap.yml優先級更高,Spring Cloud會創建一個BootstrapContext,作為Spring應用的Application Context的父上下文。初始化的時候,BootstrapContext負責從外部源加載配置屬性并解析配置。這兩個上下文共享一個從外部獲取的Environment。Bootstrap屬性有高優先級,默認情況下,它們不會被本地配置覆蓋。Bootstrap context和Application Context有著不同的約定,所以新增了一個bootstrap.yml文件,保證`Bootstrap Context和Application Context配置的分離。要將Client模塊下的application.yml文件改為bootstrap.yml,這是很關鍵的,因為bootstrap.yml是比application.yml先加載的。bootstrap.yml優先級高于application.yml
效果圖:
(6)修改bootstrap.yml文件配置
server:port: 3366spring:application:name: config-clientcloud:#config客戶端配置(下述4個配置綜合起來,意思是讀取http://localhost:3344地址里的master分支里的config-dev.ymL配置文件,即讀取http://config-3344.com:3344/master/config-dev.ymlconfig:#分支名稱label: master#配置文件名稱name: config#讀取后綴名稱profile: dev#配置中心地址uri: http://localhost:3344#服務注冊到eureka地址
eureka:client:service-url:defaultZone: http://eureka7001.com:7001/eureka/#暴露監控的端口
management:endpoints:web:exposure:include: "*"
(7)為cloud-config-client-3366子模塊新建一個主啟動類,類名輸入com.ken.springcloud.ConfigClientMain3366,然后創建即可
效果圖:
(8)編寫ConfigClientMain3366主啟動類
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包下新建一個名為controller的包
效果圖:
5、在controller包下新建一個名為ConfigClientController的控制類
效果圖:
6、修改cloud-config-center-3344子模塊的pom.xml文件,然后reolad一下,下載依賴
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><!--以下依賴都沒寫版本號,沒寫版本號的情況下會引用父項目的版本--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!--監控--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--熱部署--><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><!--添加消息總線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子模塊的application.yml文件配置
例:
server:port: 3344spring:application:#注冊進Eureka的微服務名稱name: cloud-config-centercloud:config:server:git:#倉庫路徑地址uri: https://gitee.com/用戶名/springcloud-config.git#搜索目錄search-paths:- springcloud-config#跳過ssl驗證skip-ssl-validation: true#如果是github的就填github的,如果倉庫是公開的,這里不用填username: 這里填你gitee的賬號#如果是github的就填github的,如果倉庫是公開的,這里不用填password: 這里填你gitee的密碼#讀取分支label: master#rabbitmq相關配置
rabbitmq:host: localhostport: 5672username: guestpassword: guest#rabbitmq相關配置,暴露bus刷新配置的端點
management:#暴露bus刷新配置的端點endpoints:web:exposure:include: 'bus-refresh'eureka:client:#表示是否將自己注冊進Eureka Server里,默認為trueregister-with-eureka: falseservice-url:defaultZone: http://eureka7001.com:7001/eureka/
8、修改cloud-config-client-3355子模塊的pom.xml文件,然后reolad一下,下載依賴
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><!--以下依賴都沒寫版本號,沒寫版本號的情況下會引用父項目的版本--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!--監控--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--熱部署--><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><!--添加消息總線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子模塊的bootstrap.yml文件配置
例:
server:port: 3355spring:application:name: config-clientcloud:#config客戶端配置(下述4個配置綜合起來,意思是讀取http://localhost:3344地址里的master分支里的config-dev.ymL配置文件,即讀取http://config-3344.com:3344/master/config-dev.ymlconfig:#分支名稱label: master#配置文件名稱name: config#讀取后綴名稱profile: dev#配置中心地址uri: http://localhost:3344#rabbitmq相關配置
rabbitmq:host: localhostport: 5672username: guestpassword: guest#服務注冊到eureka地址
eureka:client:service-url:defaultZone: http://eureka7001.com:7001/eureka/#暴露監控的端口
management:endpoints:web:exposure:include: "*"
10、修改cloud-config-client-3366子模塊的pom.xml文件,然后reolad一下,下載依賴
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><!--以下依賴都沒寫版本號,沒寫版本號的情況下會引用父項目的版本--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!--監控--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--熱部署--><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><!--添加消息總線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子模塊的bootstrap.yml文件配置
server:port: 3366spring:application:name: config-clientcloud:#config客戶端配置(下述4個配置綜合起來,意思是讀取http://localhost:3344地址里的master分支里的config-dev.ymL配置文件,即讀取http://config-3344.com:3344/master/config-dev.ymlconfig:#分支名稱label: master#配置文件名稱name: config#讀取后綴名稱profile: dev#配置中心地址uri: http://localhost:3344#rabbitmq相關配置
rabbitmq:host: localhostport: 5672username: guestpassword: guest#服務注冊到eureka地址
eureka:client:service-url:defaultZone: http://eureka7001.com:7001/eureka/#暴露監控的端口
management:endpoints:web:exposure:include: "*"
12、分別啟動eureka-server7001、cloud-config-center-3344、cloud-config-client-3355、cloud-config-client-3366服務
效果圖:
13、在瀏覽器分別輸入http://config-3344.com:3344/master/config-dev.yml、http://localhost:3355/configInfo、http://localhost:3366/configInfo,測試配置中心3344是否能成功從gitee上成功取得配置內容,測試客戶端3355、3366是否能通過配置中心從gitee上成功取得配置內容
效果圖:
gitee上config-dev.yml的配置內容
?
配置中心3344成功從gitee上成功取得配置內容
客戶端3355成功通過配置中心從gitee上成功取得配置內容
客戶端3366成功通過配置中心從gitee上成功取得配置內容
14、修改遠程倉庫上config-dev.yml配置文件的內容
(1)修改遠程倉庫上config-dev.yml配置文件的內容,我這里把version改為3
(2)提交修改
15、在命令行輸入以下命令,然后按回車進行請求,對cloud-config-center-3344服務發送請求讓3344服務進行刷新的操作
curl -X POST "http://localhost:3344/actuator/bus-refresh"
效果圖:
16、驗證是否成功實現動態刷新全局廣播
重新在瀏覽器上請求http://config-3344.com:3344/master/config-dev.yml接口,SpringCloud Config服務端這時候能獲取到最新的配置
重新在瀏覽器上請求接口,發現SpringCloud Config3355客戶端這時候能通過服務端獲取到最新的配置
重新在瀏覽器上請求http://localhost:3366/configInfo接口,發現SpringCloud Config3366客戶端這時候能通過服務端獲取到最新的配置
由上述結果可以看出我們成功的實現了只要刷新SpringCloud Config服務端,就會動態刷新全局SpringCloud Config客戶端使客戶端動態獲取遠程倉庫上最新配置文件內容的效果