Maven multi module에서 yml(yaml) 오버라이딩 설정 (spring boot 2.x)

@PropertySources({ @PropertySource("application-share.yml"), @PropertySource("application.yml") })

@PropertySource(value = { "classpath:/application.yml", "classpath:/application-share.yml" })

위 방식은 확장자가 properties의 경우, 사용 가능하다. yml(yaml)은 사용 불가능하다.

 

방법1. 메인이 되는 yml과 서브 yml를 가질 경우의 설정(서브 yml이 2개 이상이면 문제 발생하므로 비추천)

질문 :

I have a Spring boot application that is divided in several modules. The main module runs the application and has an application.properties file in the resources folder. I'm wondering if I can add another properties file in a submodule to separate properties that are belonging to that module and how to make this working (because it is not).

---------------------------------------------------

+main_module

  +src

    +main

      +java

        +my/package/Application.java

        +resources/application.properties

 

+support_module

    +src

      +main

        +java

        +resources/application.properties

---------------------------------------------------

So, this is the current situation. Clearly the properties file in the module support_module is not read causing a NoSuchBeanDefinitionException, while if I put the content in the other properties file everything works fine.

 

해답 :

Spring Boot reads the property files in the following order. (from Spring Boot in Action)

1. Externally, in a /config subdirectory of the directory from which the application is run
2. Externally, in the directory from which the application is run
3. Internally, in a package named “config”
4. Internally, at the root of the classpath

So placing application.properties in a config sub-directory will give it a higher priority. In the following configuration, the application.properties from module_a will take precedence. You can add common defaults in application.properties and override them in individual modules by placing the configuration file in config/application.properties.

---------------------------------------------------

+common_module

  +src

    +main

      +java

        +resources/application.properties

 

+module_a

    +src

      +main

        +java

          +my/package/Application.java

          +resources/config/application.properties

---------------------------------------------------

출처 : https://stackoverflow.com/questions/33229793/how-to-add-multiple-application-properties-files-in-spring-boot

 

 

방법2. 빌드 시에 주입하는 방법(간단하게 구성가능)

@SpringBootApplication
public class Application {
 
    public static void main(String[] args) {
        new SpringApplicationBuilder(Application.class)
                .properties(new StringBuilder().append("spring.config.location=")
                        .append("classpath:/application-dev.yml").append(", classpath:/application.yml").toString())
                .run(args);
 
        // SpringApplication.run(Application.class, args);
    }
 
}

가장 편리하다.