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Editor to share with you how to use StopWatch in Spring, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

StopWatch simple stopwatch that allows timing of multiple tasks, exposing the total elapsed time and elapsed time of each named task. Hide the use of System.currentTimeMillis () to improve the readability of the application code and reduce the likelihood of calculation errors.

The following demonstration uses StopWatch to record request summary log information:

@ Slf4jpublic class PerformanceInteceptor implements HandlerInterceptor {private ThreadLocal stopWatchThreadLocal = new ThreadLocal (); @ Override public boolean preHandle (HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {StopWatch sw = new StopWatch (); stopWatchThreadLocal.set (sw); sw.start (); return true;} @ Override public void postHandle (HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {stopWatchThreadLocal.get (). Stop (); stopWatchThreadLocal.get (). Start () } @ Override public void afterCompletion (HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {StopWatch sw = stopWatchThreadLocal.get (); sw.stop (); String method = handler.getClass (). GetSimpleName (); if (handler instanceof HandlerMethod) {String beanType = ((HandlerMethod) handler). GetBeanType (). GetName (); String methodName = (HandlerMethod) handler). GetMethod (). GetName (); method = beanType + "." + methodName } / / sw.getTotalTimeMillis (), total execution time / / sw.getTotalTimeMillis ()-sw.getLastTaskTimeMillis (), time required to execute the method body log.info ("{}; {} ms; {} ms)" {} ms ", request.getRequestURI (), method, response.getStatus (), ex = = null?"-": ex.getClass (). GetSimpleName (), sw.getTotalTimeMillis (), sw.getTotalTimeMillis ()-sw.getLastTaskTimeMillis (), sw.getLastTaskTimeMillis (); stopWatchThreadLocal.remove ();}} these are all the contents of the article" how to use StopWatch in Spring ". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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