Let's create a custom annotation, such as Auditable, to audit a business function in an application:

@InterceptorBinding
@Retention(RetentionPolicy.RUNTIME)
@Documented
annotation class Auditable

The Auditable annotation is itself annotated with @InterceptorBinding and has a runtime retention policy to make the annotation visible at runtime.

We can use Auditable in business functions as follows:

@Stateless
class App {
    @Inject
    private lateinit var identityCreator: IdentityCreator
    @Inject
    private lateinit var identityRepository: IdentityRepository

    @Auditable
    fun createIdentity(inputData: InputData): Identity {
        val person = identityCreator.createPerson(inputData)
        identityRepository.store(person)
        return person
    }
}