How can changes to the configuration file in Spring Boot take effect without needing to restart?

2 years ago
Ava Mitchell
1 minute

In Spring Boot, you can dynamically refresh configuration files without restarting the application by using the @RefreshScope annotation.

Here are the steps to follow:

  1. properties file containing application settings
  2. YAML file for an application
  3. The value is equal to.
  4. UpdateScope
  5. /actuator/refresh – It refers to the endpoint that triggers a refresh of the application’s configuration properties.

For example, consider a configuration class named MyConfig with a configuration property named my.property that needs to be dynamically refreshed.

@Configuration
@RefreshScope
public class MyConfig {
    @Value("${my.property}")
    private String myProperty;

    // 省略其他代码...
}

Configure the properties my.property and management.endpoints.web.exposure.include in the application.properties file.

my.property=Hello World
management.endpoints.web.exposure.include=*

After modifying the my.property configuration, you can send a POST request to the /actuator/refresh path to refresh the configuration.

$ curl -X POST http://localhost:8080/actuator/refresh

This will trigger a dynamic refresh of the configuration, allowing the modified settings to take effect without the need to restart the application.

bannerAds