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

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.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.9.RELEASE</version>
    <relativePath />
</parent>
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Edgware.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>
<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-config-server</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-eureka</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-bus-amqp</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </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.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.9.RELEASE</version>
    <relativePath />
</parent>
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Edgware.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>
<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-config</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-eureka</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-bus-amqp</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </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