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Spring cloud config集成过程详解

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这篇文章主要介绍了spring cloud config集成过程详解,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

Spring Cloud Config 分为

Spring boot版本2.1.8.RELEASE

服务中心使用Consu,启动Consu

1.配置中心(服务端)

easy-config

(1)添加依赖

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--配置中心-->
<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-config-server</artifactId>
</dependency>
<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-consul-discovery</artifactId>
</dependency>

(2)配置

  在resources下

  A. 添加 bootstrap.properties

  spring.profiles.active=native本地存储配置方式

  也可以使用git方式

server.port=8091
spring.application.name=easy-config
spring.cloud.consul.host=localhost
spring.cloud.consul.port=8500
spring.cloud.consul.discovery.service-name=${spring.application.name}
spring.cloud.consul.discovery.instance-id=${spring.application.name}:${server.port}
management.endpoints.web.exposure.include=*
management.endpoint.health.show-details=always

spring.profiles.active=native
spring.cloud.config.server.native.search-locations=classpath:/config/

  B. 添加config/easy-api-dev.properties

hello-string=我是来自配置中心的
(3)修改启动类

添加注解@EnableConfigServer开启配置服务支持

package com.tydt.easy.config;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;

@EnableConfigServer
@SpringBootApplication
public class EasyConfigApplication {

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

}

启动easy-config

浏览器访问 http://localhost:8091/easy-api/dev

返回结果

{
 "name": "easy-api",
 "profiles": [
  "dev"
 ],
 "label": null,
 "version": null,
 "state": null,
 "propertySources": [
  {
   "name": "classpath:/config/easy-api-dev.properties",
   "source": {
    "hello-string": "我是来自配置中心的"
   }
  }
 ]
}

说明:

  配置中心的配置文件会被转化成相应的web接口

2.客户端

easy-api

(1)添加依赖

<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
 <groupId>org.springframework.cloud</groupId>
 <artifactId>spring-cloud-starter-consul-discovery</artifactId>
</dependency>
<dependency>
 <groupId>org.springframework.cloud</groupId>
 <artifactId>spring-cloud-starter-config</artifactId>
</dependency>

(2)配置

  添加配置bootstrap.properties

  通过注册中心的发现服务,去配置中心查找配置

server.port=8083
spring.application.name=easy-api
spring.profiles.active=dev
spring.cloud.consul.host=localhost
spring.cloud.consul.port=8500

spring.cloud.consul.discovery.health-check-path=/actuator/health
spring.cloud.consul.discovery.service-name=${spring.application.name}
spring.cloud.consul.discovery.heartbeat.enabled=true

management.endpoints.web.exposure.include=*
management.endpoint.health.show-details=always

spring.cloud.config.discovery.enabled=true
spring.cloud.config.discovery.service-id=easy-config
#设为true,如果无法连接config server,启动时会抛异常,并停止服务
spring.cloud.config.fail-fast=true

(3)测试方法

package com.tydt.engine.api.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {
 @Value("${hello-string}")
 private String helloString;
 @RequestMapping("/")
 public String Hello(){
  return "hello,easy-api,"+helloString;
 }
}

3.测试

启动easy-api

测试地址

  http://localhost:8083/

返回结果

  hello,easy-api,我是来自配置中心的

4.更新

修改了配置中心的配置后,如何读取到新的配置呢

(1)修改测试方法

添加注解 @RefreshScope

package com.tydt.easy.api.controller;

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;
@RefreshScope
@RestController
public class HelloController {
 @Value("${hello-string}")
 private String helloString;
 @RequestMapping("/")
 public String Hello(){
  return "hello,easy-api,"+helloString;
 }
}

启动easy-config

启动easy-api

测试地址

  http://localhost:8083/

返回结果

  hello,easy-api,我是来自配置中心的

(2)修改配置

easy-config的resources/config/easy-api-dev.properties

hello-string=我是来自配置中心的111

重启easy-config

执行http://localhost:8083/actuator/refresh

输出

[
 "hello-string"
]
http://localhost:8083/

输出

hello,esay-api,我是来自配置中心的111

说明:

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