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Kotlin SpringMVC HandlerInterceptor – Spring Boot
Kotlin SpringMVC HandlerInterceptor – Spring Boot
In the tutorial, JavaSampleApproach will show you how to create a Kotlin SpringMVC HandlerInterceptor that provides a mechanism to intercept requests {
preProcessing, postProcessing and afterCompletion} with SpringBoot.I. Technologies
– Java 1.8
– Maven 3.6.1
– Spring Tool Suite – Version 3.9.0.RELEASE
– Spring Boot – 1.5.9.RELEASE
– Kotlin 1.1.61
– Maven 3.6.1
– Spring Tool Suite – Version 3.9.0.RELEASE
– Spring Boot – 1.5.9.RELEASE
– Kotlin 1.1.61
II. Goal
We use SpringToolSuite to create a Kotlin SpringBoot project as below structure:
Use HandlerInterceptor to intercept requests:
@Component
class LogInterceptor: HandlerInterceptor{
val log = LoggerFactory.getLogger(LogInterceptor::class.java);
override fun preHandle(request: HttpServletRequest, response: HttpServletResponse, dataObject: Any) : Boolean{
log.info("1. from PreHandle method.")
return true
}
override fun postHandle(request: HttpServletRequest, response: HttpServletResponse, dataObject: Any, model: ModelAndView?){
log.info("3. from PostHandle method.")
}
override fun afterCompletion(request: HttpServletRequest, response: HttpServletResponse, dataObject: Any, e: Exception?) {
log.info("4. from AfterCompletion method - Request Completed!")
}
}
With a simple RestAPI:
@GetMapping("/hello")
fun hello(): String{
log.info("2. Actual Excuting - Welcome to @GetMapping: /hello!")
return "Hello World!"
}
We make a request
http://localhost:8080/hello, see logs:More at:
Kotlin SpringMVC HandlerInterceptor – Spring Boot
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