In SpringBoot I want to create a simple constant class to be populated from application.yaml. I have found a solution leveraging Lombok.

@RequiredArgsConstructor
@ConfigurationProperties("app")
public final class PropertiesConstants {
  public final String MY_FIRST_PROPERTY;
}

This is pretty neat and straight forward. I want to extend the solution with default value if the property in application.yaml is missing.

The simplest solution I found is following:

@ConfigurationProperties("app")
public final class PropertiesConstantsDefaults {
  public final String MY_FIRST_PROPERTY;

  public PropertiesConstantsDefaults(
      @DefaultValue("default") 
      String myFirstProperty
  ) {
    MY_FIRST_PROPERTY = myFirstProperty;
  }
}

This works but it is by far not as short and straight forward as the first one. I wonder if there is a better option.