Kotlin Spring Audit Annotation

Audit.kt

package com.example.backend.audit

@Target(AnnotationTarget.FUNCTION)
@Retention(AnnotationRetention.RUNTIME)
annotation class Audit(val purpose: String) {
}

AuditAspect.kt

package com.example.backend.audit

import org.aspectj.lang.ProceedingJoinPoint
import org.aspectj.lang.annotation.Around
import org.aspectj.lang.annotation.Aspect
import org.aspectj.lang.reflect.MethodSignature
import org.slf4j.LoggerFactory
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.stereotype.Component
import java.util.*

@Aspect
@Component
class AuditAspect {

    private val logger = LoggerFactory.getLogger(AuditAspect::class.java)

    @Around("@annotation(com.example.backend.audit.Audit)")
    fun auditExecution(joinPoint: ProceedingJoinPoint): Any? {

        val data = joinPoint.proceed()
        val input = joinPoint.args[0] as Any
        val annotation = (joinPoint.signature as MethodSignature).method.getAnnotation(Audit::class.java)

        // do some stuff...

        return data
    }
}