Kotlin for Enterprise Applications using Java EE

Defining a custom interceptor

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

@InterceptorBinding@Retention(RetentionPolicy.RUNTIME)@Documentedannotation 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:

@Statelessclass 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    }}