SpringCloud Bus （Finchley版本）

1.首先安装rabbitMQ，参考我的另外一篇博文：https://blog.csdn.net/qq_33371766/article/details/101426395，并启动服务。

后面实现完成之后，便会看到springcloudBus。

2.参考上篇博文https://blog.csdn.net/qq_33371766/article/details/106322419 启动服务注册中心，和remote-server服务。

3.接下来实现eureka-bus服务。

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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.cxb</groupId>
    <artifactId>springcloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>eureka-bus</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
    </properties>

    <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>

    <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-netflix-eureka-client</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>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

bootstrap.properties 

spring.rabbitmq.host=localhost
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
server.port=8767

# 注意远端的文件名称是这里的name + profile 构成的 后缀是 .properties
spring.application.name=eureka-bus
spring.cloud.config.label=master
spring.cloud.config.profile=dev

spring.cloud.bus.enabled=true
spring.cloud.bus.trace.enabled=true
management.endpoints.web.exposure.include=bus-refresh


eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/
spring.cloud.config.discovery.enabled=true
spring.cloud.config.discovery.serviceId=remote-server

注意这里需要去远程仓库创建对应的文件：

IndexController：

package com.cxb.springcloud.web;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RefreshScope
public class IndexController {

    @Value("${address}")
    private String address;

    @RequestMapping(value = "/hi")
    public String hi(){
        return address;
    }
}

EurekaBusApplication

package com.cxb.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;


@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
public class EurekaBusApplication {

    public static void main(String[] args) {
        SpringApplication.run(EurekaBusApplication.class, args);
    }

}

最后测试看效果：

成功获取远程配置信息。

后面将远程配置信息修改。如果是传统的做法，需要重启服务，才能达到配置文件的更新。此时，我们只需要发送post请求：http://localhost:8767/actuator/bus-refresh 即可刷新信息。

另外，/actuator/bus-refresh接口可以指定服务，即使用”destination”参数，比如 “/actuator/bus-refresh?destination=eureka:**” 即刷新服务名为eureka的所有服务。

查看信息，成功更新信息。