springcloud实战之14动态刷新分布式配置中心属性配置(config)

springcloud实战之10 分布式配置中心(config)介绍了如何用spring cloud config和git仓库读取配置文件,当配置文件里的属性发生变化,按照以往的惯例,必须重启服务才能够读取到新的配置属性。但springcloud config为我们提供了springcloud bus(消息总线)能够实现动态刷新配置文件。

重构(springcloud-server-config)工程

添加依赖

<parent>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-parentartifactId>
    <version>1.5.9.RELEASEversion>
    <relativePath />
parent>
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-dependenciesartifactId>
            <version>Edgware.RELEASEversion>
            <type>pomtype>
            <scope>importscope>
        dependency>
    dependencies>
dependencyManagement>
<dependencies>
    <dependency>
        <groupId>org.springframework.cloudgroupId>
        <artifactId>spring-cloud-config-serverartifactId>
    dependency>
    <dependency>
        <groupId>org.springframework.cloudgroupId>
        <artifactId>spring-cloud-starter-eurekaartifactId>
    dependency>
    <dependency>
        <groupId>org.springframework.cloudgroupId>
        <artifactId>spring-cloud-starter-bus-amqpartifactId>
    dependency>
    <dependency>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-actuatorartifactId>
    dependency>
dependencies>

改造入口类

@SpringBootApplication
@EnableConfigServer
@EnableDiscoveryClient
public class SpringCloudServerConfigApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringCloudServerConfigApplication.class,args) ;
    }
}

修改配置文件

server:
  port: 8001
management:
  security:
    enabled: false
spring:
  application:
    name: springcloud-server-config
  cloud:
    config:
      server:
        git:
          uri: https://github.com/shiyuan2he/springcloud
          search-paths: springcloud-repo-config
          username:
          password:
          force-pull: true
      label: master
  rabbitmq:
    host: 192.168.175.128
    port: 5672
    username: admin
    password: admin
eureka:
  client:
    service-url:
      defaultZone: http://peer1:8080/eureka/

重构springcloud-service-config项目

添加依赖

<parent>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-parentartifactId>
    <version>1.5.9.RELEASEversion>
    <relativePath />
parent>
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-dependenciesartifactId>
            <version>Edgware.RELEASEversion>
            <type>pomtype>
            <scope>importscope>
        dependency>
    dependencies>
dependencyManagement>
<dependencies>
    <dependency>
        <groupId>org.springframework.cloudgroupId>
        <artifactId>spring-cloud-starter-configartifactId>
    dependency>
    <dependency>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-webartifactId>
    dependency>
    <dependency>
        <groupId>org.springframework.cloudgroupId>
        <artifactId>spring-cloud-starter-eurekaartifactId>
    dependency>
    <dependency>
        <groupId>org.springframework.cloudgroupId>
        <artifactId>spring-cloud-starter-bus-amqpartifactId>
    dependency>
    <dependency>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-actuatorartifactId>
    dependency>
dependencies>

重构入口类

@SpringBootApplication
@EnableDiscoveryClient
public class SpringCloudServiceConfigApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringCloudServiceConfigApplication.class,args) ;
    }
}

改造web层接口

@RestController
@RefreshScope
@RequestMapping(value = "/api/rest")
public class RestfulController {

    @Value("${user.name}")
    String name;
    @Value("${user.age}")
    String age ;

    @GetMapping("/name")
    public String getName(){
        return name +":"+ age;
    }
}

新建配置文件bootstrap.properties

spring.application.name=springcloud-service-config
spring.cloud.config.label=master
spring.cloud.config.profile=dev
spring.cloud.config.uri= http://localhost:8001/
server.port=8003

eureka.client.serviceUrl.defaultZone=http://peer1:8080/eureka/
## 从配置中心读取文件
spring.cloud.config.discovery.enabled=true
## 配置中心的servieId,即服务名。
spring.cloud.config.discovery.serviceId=springcloud-server-config
spring.cloud.config.fail-fast=true

spring.rabbitmq.host=192.168.175.128
spring.rabbitmq.port=5672
spring.rabbitmq.username=admin
spring.rabbitmq.password=admin

management.security.enabled=false

启动项目

1.启动服务注册中心集群(springcloud-server-eureka)

2.启动服务配置中心(springcloud-server-config)

3.启动springcloud-service-config集群

启动后的服务注册图如下:

springcloud实战之14动态刷新分布式配置中心属性配置(config)_第1张图片

分别调用两个读取配置文件得集群:

springcloud实战之14动态刷新分布式配置中心属性配置(config)_第2张图片

springcloud实战之14动态刷新分布式配置中心属性配置(config)_第3张图片

去github仓库修改配置文件,并访问之前的集群服务,还没有立马生效

springcloud实战之14动态刷新分布式配置中心属性配置(config)_第4张图片

调用http://localhost:8001/bus/refresh 接口刷新配置中心服务

springcloud实战之14动态刷新分布式配置中心属性配置(config)_第5张图片

再次查看集群服务,如下图

springcloud实战之14动态刷新分布式配置中心属性配置(config)_第6张图片

springcloud实战之14动态刷新分布式配置中心属性配置(config)_第7张图片

源码

springcloud-server-eureka

springcloud-server-config

springcloud-service-config

历史文章

springcloud实战之1 技术选型:dubbo还是springcloud

springcloud实战之2 服务注册与发现(eureka实现)

springcloud实战之3 高可用服务注册中心(eureka集群)

springcloud实战之5 服务消费者(ribbon)

springcloud实战之6 服务消费者(Feign)

springcloud实战之7 断路器(Hystrix)

springcloud实战之8 断路器-仪表盘-单例监控(Hystrix)

springcloud实战之9断路器-集群监控(turbine)

springcloud实战之10 分布式配置中心(config)

springcloud实战之11路由网关(zuul)

springcloud实战之12 路由网关拦截器

springcloud实战之13 rabbitmq消息总线(bus)

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