How to profile Spring MVC request?

profiler.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns="http://www.springframework.org/schema/beans"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--
        MVC Profiling configuration.
    -->

    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <mvc:exclude-mapping path="/resources/**"/>
            <bean class="com.mariuzzo.profiler.ProfilerInterceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>

</beans>

ProfilerInterceptor.java

package com.mariuzzo.profiler;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

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

/**
 * @author Rubens Mariuzzo <[email protected]>
 */
public class ProfilerInterceptor extends HandlerInterceptorAdapter {

    private static final Logger logger = LoggerFactory.getLogger(ProfilerInterceptor.class);

    /**
     * This implementation always returns {@code true}.
     *
     * @param request  The current HTTP Servlet request.
     * @param response The current HTTP Servlet response.
     * @param handler  The handler.
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        put(request, "preHandleTime", System.currentTimeMillis());
        return true;
    }

    /**
     * This implementation is empty.
     *
     * @param request      The current HTTP Servlet request.
     * @param response     The current HTTP Servlet response.
     * @param handler      The handler.
     * @param modelAndView The current model and view.
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        put(request, "postHandleTime", System.currentTimeMillis());
    }

    /**
     * This implementation is empty.
     *
     * @param request  The current HTTP Servlet request.
     * @param response The current HTTP Servlet response.
     * @param handler  The handler.
     * @param ex       The thrown exception, if any.
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        long preHandleTime = (long) get(request, "preHandleTime");
        long postHandleTime = (long) get(request, "postHandleTime");
        long afterCompletionTime = System.currentTimeMillis();
        long handlingTime = postHandleTime - preHandleTime;
        long completionTime = afterCompletionTime - postHandleTime;
        long totalTime = afterCompletionTime - preHandleTime;
        logger.trace(String.format("[%s] handling: %dms, completion: %dms, total: %dms", request.getRequestURI(), handlingTime, completionTime, totalTime));
    }

    /**
     * Put an attribute value to a request.
     *
     * @param request The request.
     * @param key     The key of the attribute.
     * @param obj     The value of the attribute.
     */
    private void put(HttpServletRequest request, String key, Object obj) {
        request.setAttribute("com.mariuzzo.profiler.ProfilerInterceptor." + key, obj);
    }

    /**
     * Get the attribute value from a request.
     *
     * @param request The request.
     * @param key     The key of the attribute.
     * @return The value of the attribute.
     */
    private Object get(HttpServletRequest request, String key) {
        return request.getAttribute("com.mariuzzo.profiler.ProfilerInterceptor." + key);
    }
}