[microservices ｜ Nacos] quickly realize the configuration center function of Nacos, and complete configuration update and version iteration

Take on the last article , Let's continue our study nacos Another function of , Configuration center .

The new configuration

stay Nacos Spring Cloud in ,dataId The complete format is as follows ：

${prefix}-${spring.profiles.active}.${file-extension}

• prefix The default is spring.application.name Value , You can also configure spring.cloud.nacos.config.prefix To configure the .
• spring.profiles.active That is, the current environment corresponds to profile, For details, please refer to Spring Boot file . Be careful ： When spring.profiles.active It's empty time , Corresponding connector - There will be no ,dataId The splicing format of becomes ${prefix}.${file-extension}
• file-exetension To configure the data format of the content , You can use the configuration item spring.cloud.nacos.config.file-extension To configure the . Currently only supported properties and yaml type .
  

To configure @RefreshScope

adopt Spring Cloud Primary annotation @RefreshScope Implement automatic configuration update ：

@RestController
@RequestMapping("/config")
@RefreshScope
public class ConfigController {
    

    @Value("${useLocalCache:false}")
    private boolean useLocalCache;

    @RequestMapping("/get")
    public boolean get() {
    
        return useLocalCache;
    }
}

Test code

Main code

@RefreshScope
@RequestMapping(value = "/producer")
@RestController
public class ProducerController {
    

    @Value(value = "${server.port}")
    private String port;

    @Value("${ossa.info}")
    private String config;

    @GetMapping("/{id}")
// @SentinelResource(value = "producerById", fallback = "error")
    public ResponseEntity<ProducerVO> producerById(@PathVariable(value = "id") String id) {
    

        ProducerVO producerVO = new ProducerVO();
        producerVO.setId(id);
        producerVO.setPort(port + ": " + UUID.randomUUID().toString());
        producerVO.setConfigBody(config);

        return ResponseEntity.ok(producerVO);
    }

spring:
  application:
    name: ossa-service-producer
  cloud:
    nacos:
      # docker start-up nacos：
      # docker run --name mynacos -itd -e MODE=standalone -p 8848:8848 -p 9848:9848 -p 9849:9849 nacos/nacos-server:v2.0.3
      discovery:
        server-addr: ip:8848
        namespace: 78e10147-ff76-4e56-8b19-2e2bbd39f750
        group: OSSA_GROUP
      config:
        server-addr: ip:8848
        file-extension: yml
        refresh-enabled: true
        group: OSSA_GROUP
        namespace: 78e10147-ff76-4e56-8b19-2e2bbd39f750

To configure nacos

Publish new configuration

test