SpringBootNacos实现自动刷新
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
- server-addr：nacos地址
- namespace：命名空间，即 id
- group：标识分组
- file-extension：文件后缀名
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);
}
}
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