```
@Target(TYPE)
@Retention(RUNTIME)
@Documented
public @interface StaticInitSafe
```
Used to mark a ConfigSource, ConfigSourceProvider or ConfigSourceFactory as safe to be initialized during STATIC INIT. When a Quarkus application is starting up, Quarkus will execute first a static init method which contains some extensions actions and configurations. Example:
```
 // Auto Generated by Quarkus
 public class Application {
     static {
         Config config = ConfigProvider.getConfig();
         String url = config.getValue("database.url", String.class);
         String login = config.getValue("database.login", String.class);
         String password = config.getValue("database.password", String.class);

         initDatabase(url, login, password);
     }
 }
 
```
Please check Initializing Fields for more information about static blocks. Since Config initializes first, some ConfigSources may not be suited to be initialized at static init. Consider the previous code example and a ConfigSource that requires database access. In this case, it is impossible to properly initialize such ConfigSource, because the database services are not yet available so the ConfigSource in unusable.

Annotation Type StaticInitSafe