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SpringBoot Nacos实现自动刷新

作者:我有一只肥螳螂

这篇文章主要介绍了SpringBoot Nacos实现自动刷新,Nacos(Dynamic Naming and Configuration Service)是阿里巴巴开源的一个动态服务发现、配置管理和服务管理平台

背景

SpringBoot 版本

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.6.4</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

Nacos 版本

<dependencies>   
	 ...
	<!--nacos-->
	<dependency>
	    <groupId>com.alibaba.cloud</groupId>
	    <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
	    <version>2.2.6.RELEASE</version>
	</dependency>
</dependencies>

Spring-Cloud 版本

spring-cloud-alibaba依赖,能对nacos进行版本管理

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-dependencies</artifactId>
            <version>2.2.6.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>2021.0.1</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

application.yml 配置

spring:
  cloud:
    nacos:
      config:
        server-addr: http://xxx.com
        namespace: name
        group: name
        file-extension: yml

现象

application.yml 配置 myvalue 的值

myvalue: myvalue-test

接口类引用 myvalue

@RestController
@Slf4j
public class TestController extends BaseController {
    @Value("${myvalue}")
    private String myvalue;
    @ApiOperation(value = "测试", notes = "测试value")
    @GetMapping(value = "/test/feng/test")
    NjcResponseEntity testValue() {
        log.info( myvalue);
        return super.success("查询", myvalue);
    }
}

在线修 nacos 上 myvalue 的值

后台可以看到 myvalue 已被修改

2023-01-10 10:56:03.402  WARN  [TID: N/A]  c.a.c.n.c.NacosPropertySourceBuilder:  Ignore the empty nacos configuration and get it based on dataId[pm] & group[pm]
2023-01-10 10:56:03.407  WARN  [TID: N/A]  c.a.c.n.c.NacosPropertySourceBuilder:  Ignore the empty nacos configuration and get it based on dataId[pm.yml] & group[pm]
2023-01-10 10:56:03.415  INFO  [TID: N/A]  o.s.c.b.c.PropertySourceBootstrapConfiguration:  Located property source: [BootstrapPropertySource {name='bootstrapProperties-pm-feng.yml,pm'}, BootstrapPropertySource {name='bootstrapProperties-pm.yml,pm'}, BootstrapPropertySource {name='bootstrapProperties-pm,pm'}]
2023-01-10 10:56:03.417  INFO  [TID: N/A]  o.s.boot.SpringApplication:  The following 1 profile is active: "feng"
2023-01-10 10:56:03.425  INFO  [TID: N/A]  o.s.boot.SpringApplication:  Started application in 0.227 seconds (JVM running for 38.127)
Logging initialized using 'class org.apache.ibatis.logging.stdout.StdOutImpl' adapter.
2023-01-10 10:56:03.508  INFO  [TID: N/A]  o.s.c.e.event.RefreshEventListener:  Refresh keys changed: [myvalue]

但通过接口获取 myvalue 的值并没有改变

优化

如何修改为自动更新,加上注解 @RefreshScope 即可

@RestController
@Slf4j
@RefreshScope
public class TestController extends BaseController {
    @Value("${myvalue}")
    private String myvalue;
    @ApiOperation(value = "测试", notes = "测试value")
    @GetMapping(value = "/test/feng/test")
    NjcResponseEntity testValue() {
        log.info( myvalue);
        return super.success("查询", myvalue);
    }
}

到此这篇关于SpringBoot Nacos实现自动刷新的文章就介绍到这了,更多相关SpringBoot Nacos刷新内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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