Spring Cloud Bus（四）配置中心和消息总线终结版

Spring Cloud Bus（四）配置中心和消息总线终结版

spring cloud bus原理参考

配置中心svn示例和refresh中讲到，如果需要客户端获取到最新的配置信息需要执行refresh，我们可以利用webhook的机制每次提交代码发送请求来刷新客户端，当客户端越来越多的时候，需要每个客户端都执行一遍，这种方案就不太适合了。使用Spring Cloud Bus可以完美解决这一问题。

• 一、准备工作，先安装RabbitMQ
• 安装erlang
• 安装RabbitMQ
• 若遇到安装erlang失败的问题，请卸载重装，安装完成erlang后需要在环境变量配置；
• 安装RabbitMQ后环境变量配置启动
• 加载rabbitmq图形化插件 命令为 .\rabbitmq-plugins enable rabbitmq_management
• F:\idea\RabbitMQ\RabbitMQ\rabbitmq_server-3.7.4\sbin 此处打开windows 命令行，若是超级管理员只需要输入rabbit-server start，否则输入 .\rabbit-server start
• 打开浏览器输入 http://localhost:15672/； 默认账号：guest 密码：guest

4369 (epmd), 25672 (Erlang distribution)
5672, 5671 (AMQP 0-9-1 without and with TLS)
15672 (if management plugin is enabled)
61613, 61614 (if STOMP is enabled)
1883, 8883 (if MQTT is enabled)

启动界面

二、开始spring cloud bus

• spring-cloud-bus-server

spring-cloud-bus-server的 application.yml

server:
  port: 8002
spring:
  application:
    name: spring-cloud-bus-server
  cloud:
    config:
      server:
        git:
          uri: https://github.com/chouxin/spring-cloud-config-repo/     # 配置git仓库的地址
          search-paths: config-repo                             # git仓库地址下的相对地址，可以配置多个，用,分割。
          username: your username                                     # git仓库的账号
          password: your password                                   # git仓库的密码
  rabbitmq:
    host: 127.0.0.1
    port: 5672
    username: guest   #rabbitmq 默认账号和密码是guest
    password: guest

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8001/eureka/   # 注册中心eurka地址

spring-cloud-bus-server的pom.xml

<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>4.0.0modelVersion>

    <groupId>cn.qxgroupId>
    <artifactId>spring-cloud-bus-serverartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <packaging>jarpackaging>

    <name>spring-cloud-bus-servername>
    <description>Demo project for Spring Bootdescription>

    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.0.0.RELEASEversion>
        <relativePath/> 
    parent>

    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
        <java.version>1.8java.version>
        <spring-cloud.version>Finchley.M9spring-cloud.version>
    properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-amqpartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-config-serverartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-starter-netflix-eureka-clientartifactId>
        dependency>

        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <optional>trueoptional>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
    dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloudgroupId>
                <artifactId>spring-cloud-dependenciesartifactId>
                <version>${spring-cloud.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>
        dependencies>
    dependencyManagement>

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

    <repositories>
        <repository>
            <id>spring-milestonesid>
            <name>Spring Milestonesname>
            <url>https://repo.spring.io/milestoneurl>
            <snapshots>
                <enabled>falseenabled>
            snapshots>
        repository>
    repositories>


project>

• spring-cloud-bus-client
  spring-cloud-bus-client的bootstrap.yml

spring:
  cloud:
    config:
      name: cn-qx-config
      profile: dev
      label: master
      discovery:
        enabled: true
        service-id: spring-cloud-bus-server  #buse-server的名称
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8001/eureka/

#spring.application.name：对应{application}部分
#spring.cloud.config.name：对应配置文件名称 cn-qx-config-dev.yml
#spring.cloud.config.profile：对应{profile}部分
#spring.cloud.config.label：对应git的分支。如果配置中心使用的是本地存储，则该参数无用
#spring.cloud.config.uri：配置中心的具体地址
#spring.cloud.config.discovery.service-id：指定配置中心的service-id，便于扩展为高可用配置集群。

spring-cloud-bus-client的application.yml

spring:
  application:
    name: bus-client1
  rabbitmq:
    host: 127.0.0.1
    port: 5672
    username: guest
    password: guest
  cloud:
    bus:
      trace:
        enabled: true

server:
  port: 9006

spring-cloud-bus-client的pom.xml

<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>4.0.0modelVersion>

    <groupId>cn.qxgroupId>
    <artifactId>spring-cloud-bus-client2artifactId>
    <version>0.0.1-SNAPSHOTversion>
    <packaging>jarpackaging>

    <name>spring-cloud-bus-client2name>
    <description>Demo project for Spring Bootdescription>

    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.0.0.RELEASEversion>
        <relativePath/> 
    parent>

    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
        <java.version>1.8java.version>
        <spring-cloud.version>Finchley.M7spring-cloud.version>
    properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-amqpartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-starter-configartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-starter-netflix-eureka-clientartifactId>
        dependency>

        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <optional>trueoptional>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-actuatorartifactId>
        dependency>
    dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloudgroupId>
                <artifactId>spring-cloud-dependenciesartifactId>
                <version>${spring-cloud.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>
        dependencies>
    dependencyManagement>

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

    <repositories>
        <repository>
            <id>spring-milestonesid>
            <name>Spring Milestonesname>
            <url>https://repo.spring.io/milestoneurl>
            <snapshots>
                <enabled>falseenabled>
            snapshots>
        repository>
    repositories>


project>

访问 http://localhost:9006/hello 会访问到配置文件中的内容；

• 问题
• 问题1：在spring boot 2.x版本中无法post请求http://localhost:9006/bus/refresh进行刷新,在spring boot1.x是可以请求的；
• 解答：暂时，无；亟待解决！