十二、SpringCloud之Spring Cloud Bus配置中心

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_29479041/article/details/84323420

一、简介

ConfigServer使用了Spring Cloud Bus之后(引入Spring Cloud Bus用来操作消息队列)，会对外提供一个接口，叫做bus-refresh，远端git访问这个接口ConfigServer就会把配置更新的信息发送到消息队列(RabbitMQ)里面，ConfigServer 和order服务通过消息队列(RabbitMQ)来传递消息

二、Spring Cloud Bus实操

1、config-server

• pom.xml

<?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">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.imooc</groupId>
    <artifactId>config</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    <name>config</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
    </properties>
    <!-- 引入依赖 -->
    <dependencies>
        <!-- 引入config-server-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
        <!-- 引入eureka-client-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!-- 引入eureka-server-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
        <!-- 引入bus-amqp 消息队列-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>
        <!-- 引入config-monitor 自动刷新配置-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-monitor</artifactId>
        </dependency>
        <!-- 引入actuator 自动刷新配置-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <!-- 版本依赖管理 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <!-- 打包 -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
    <!-- 仓库地址-->
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>

• bootstrap.yml

spring:
  application:
    name: config #配置服务名称
  #配置config-server
  cloud:
    config:
      server:
        git:
          uri: https://github.com/AmyZurich/zwj #地址
          username: XXX # 用户名
          password: XXX # 密码
          #配置文件拉取地址
          #basedir: /Users/Amy/Documents/ideaproject/config/basedir
  rabbitmq:
    host: 192.168.3.233
    username: guest
    password: guest
    port: 5672
#配置Eureka
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
#配置端扣号
server:
  port: 8808
management:
  endpoints:
    web:
      exposure:
        include: "*"

• ConfigApplication

@SpringBootApplication
@EnableDiscoveryClient //开启发现服务功能
@EnableConfigServer //开启服务端功能
public class ConfigApplication {
    public static void main(String[] args) {
        SpringApplication.run(ConfigApplication.class, args);
    }
}

• 测试

测试地址：http://localhost:8808/order-dev.yml

2、config-client

• pom.xml

<?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">
    <modelVersion>4.0.0</modelVersion>
    <!-- 父项目 -->
    <parent>
        <artifactId>order</artifactId>
        <groupId>com.imooc</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>order-server</artifactId>
    <!-- 引入依赖 -->
    <dependencies>
        <!-- 引入web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- 引入eureka-client -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!-- 引入data-jpa -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <!-- 引入mysql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!-- 引入lombok 可以省去get set方法 -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!-- 引入gson 转换数据-->
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>
        <!-- 引入feign 应用通信-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-feign</artifactId>
            <version>1.4.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- 引入order-common-->
        <dependency>
            <groupId>com.imooc</groupId>
            <artifactId>order-common</artifactId>
        </dependency>
        <!-- 引入product-client -->
        <dependency>
            <groupId>com.imooc</groupId>
            <artifactId>product-client</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
        <!-- 引入cloud-config-client 统一配置中心 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-client</artifactId>
        </dependency>
        <!-- 引入bus-amqp 消息队列-->
        <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>
    <!-- 版本依赖管理 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <!-- 打包 -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
    <!-- 仓库地址 -->
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>

• bootstrap.yml

spring:
  application:
    name: order #配置服务名称
  #统一配置中心
  cloud:
      config:
        discovery:
          enabled: true
          service-id: CONFIG   #configServer 服务的名字
        profile: dev
      bus:
        trace:
          enabled: true
  #消息队列
  rabbitmq:
    host: 192.168.3.233
    username: guest
    password: guest
    port: 5672
#配置Eureka
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/

• OrderApplication

@SpringBootApplication //开启服务发现功能
@EnableDiscoveryClient
//扫描商品的包路径
@EnableFeignClients(basePackages = "com.imooc.product.client")//开启Feign功能
@RefreshScope
public class OrderApplication {
	public static void main(String[] args) {
		SpringApplication.run(OrderApplication.class, args);
	}
}

• Controller

@Data
@Component
@ConfigurationProperties("girl")
@RefreshScope //刷新配置
public class GirlConfig {
    private String name;
    private Integer age;
}

@RestController
@RefreshScope //刷新配置
public class GirlController {
    @Autowired
    private GirlConfig girlConfig;
    @GetMapping("/girl/print")
    public String print() {
        return "name:" + girlConfig.getName() + " age:" + girlConfig.getAge();
    }
}

• 测试

测试地址：http://localhost:8802/girl/print

3、自动刷新配置

• 获取natapp提供的外网网址，即可实现本地实时开发调试了，natapp教程。
• 打开git上配置仓库的地址，添加webhooks

上面的Payload URL就填写我们的配置中心触发刷新的地址，当然这里不能写localhost啦，要外网访问地址才行。