package com.sample.app.interceptors;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.lang.Nullable;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class PerformanceReportInterceptor implements HandlerInterceptor {

private long startTime;

public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
        startTime = System.nanoTime();
return true;

}

public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
@Nullable ModelAndView modelAndView) throws Exception {
long executionTime = System.nanoTime() - startTime;
        modelAndView.addObject("executionTime", executionTime);
}
}