这篇文章主要介绍了Spring Cloud应用实现配置自动刷新过程详解,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
通过spring cloud 的消息总线，将配置github 等源代码仓库的变更通知到spring cloud 的所有组件。
spring-bus 需要用到rabbitmq ，所以需要提前准备rabbitmq消息队列环境
配置中心调整
1.配置中心配置引用pom
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bus-amqp</artifactId></dependency><dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-config-monitor</artifactId></dependency>
2. 配置中心配置
spring: application: name: spring-config cloud: config: server: git: uri: https://github.com/halouprogramer/spring-config-repository.git# username: ***# password: *** basedir: ~/temp/gitlab rabbitmq: #增加rabbitmq的配置 host: 192.168.114.129 port: 5672 username: admin password: admineureka: client: service-url: defaultZone: http://localhost:8761/eureka/ instance: prefer-ip-address: trueserver: port: 3636 management: endpoints: web: exposure: include: "*"
业务微服务中需要做的修改
1.添加pom
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bus-amqp</artifactId></dependency>
2. 配置文件
spring: application: name: spring-school cloud: config: discovery: enabled: true service-id: SPRING-CONFIG profile: dev bus: #bus id 不能使用默认，否则不能刷新 id: ${spring.application.name}:${spring.cloud.config.profile}:${random.value} profiles: active: dev rabbitmq: host: 192.168.114.129 port: 5672 username: admin password: admin eureka: client: service-url: defaultZone: http://localhost:8761/eureka/ instance: prefer-ip-address: true #配置超时时间feign: client: config: default: connectTimeout: 5000 readTimeout: 5000# logger-level: bus
spring cloud bus 会使用 bus id 去匹配应用，匹配上才会刷新配置
3.编写测试代码
package com.lvlvstart.spring.demo.school.service;import com.lvlvstart.spring.demo.school.dao.SchoolRepository;import com.lvlvstart.spring.demo.school.entity.School;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Value;import org.springframework.cloud.context.config.annotation.RefreshScope;import org.springframework.stereotype.Service;import java.util.List;import java.util.Optional;/** * @author zishu.lv@baodanyun-inc.com * @description 类描述 * @create 2019/12/9 15:53 */@Service@RefreshScopepublic class SchoolService { @Value("${env}") private String env; @Autowired private SchoolRepository repository; public List<School> findAll(){ return repository.findAll(); } public School findById(String choolId){ Optional<School> school = repository.findById(choolId); if(school.isPresent()){ return school.get(); } return null; } public String getEnv(){ return env; }}
package com.lvlvstart.spring.demo.school.web;import com.lvlvstart.spring.demo.school.service.SchoolService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Value;import org.springframework.cloud.context.config.annotation.RefreshScope;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@RestController@RequestMapping("config-demo")public class ConfigDemoController { @Autowired private SchoolService schoolService; @GetMapping("get-env") private String getEnv(){ return schoolService.getEnv(); }}
@RefreshScope 标记上才会被刷新配置
@RefreshScope 在Controller层使用，取不到值
利用githbu webhook 自动实现刷新配置:
Payload URL 需要添加config server 开放的monitor(monitor 为spring 自带地址) ，如果在内网，可以搜索内网穿透工具配置修改仓库配置后，访问地址:http://localhost:8081/config-demo/get-env 地址也会发生改变
完整代码访问：https://github.com/halouprogramer/spring-cloud-demo
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本文标题: Spring Cloud应用实现配置自动刷新过程详解
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