Spring MVC Interceptor 实现性能监控的功能代码
利用SpringMVC的Interceptor实现个简易的性能监控,计算一下每个url的执行时间。
在preHandle方法中记录当前的时间戳到线程局部变量里,然后在afterCompletion方法中,用当前的时间戳剪掉线程局部变量里的时间戳得出个运行时间,并记录到log里。
这只是个简易的性能监控,如果想长期正式的监控性能,请选择其它成熟的产品。
Interceptor
importjavax.servlet.http.HttpServletRequest; importjavax.servlet.http.HttpServletResponse; importorg.slf4j.Logger; importorg.slf4j.LoggerFactory; importorg.springframework.core.NamedThreadLocal; importorg.springframework.web.servlet.HandlerInterceptor; importorg.springframework.web.servlet.ModelAndView; publicclassPerformanceInterceptorimplementsHandlerInterceptor{ privatefinalstaticLoggerLOGGER=LoggerFactory.getLogger(PerformanceInterceptor.class); privateNamedThreadLocalstartTimeThreadLocal=newNamedThreadLocal ("performance"); @Override publicbooleanpreHandle(HttpServletRequestrequest,HttpServletResponseresponse,Objecthandler) throwsException{ startTimeThreadLocal.set(System.currentTimeMillis()); returntrue; } @Override publicvoidpostHandle(HttpServletRequestrequest,HttpServletResponseresponse,Objecthandler, ModelAndViewmodelAndView)throwsException{ return; } @Override publicvoidafterCompletion(HttpServletRequestrequest,HttpServletResponseresponse,Objecthandler,Exceptionex) throwsException{ longcurrentTime=System.currentTimeMillis(); longexecuteTime=currentTime-startTimeThreadLocal.get(); LOGGER.info("uri:{}执行了{}毫秒",request.getRequestURI(),executeTime); } }
这里的是NamedThreadLocal没啥神器的,源码如下:
packageorg.springframework.core; importorg.springframework.util.Assert; publicclassNamedThreadLocalextendsThreadLocal { privatefinalStringname; publicNamedThreadLocal(Stringname){ Assert.hasText(name,"Namemustnotbeempty"); this.name=name; } @Override publicStringtoString(){ returnthis.name; } }
定义完Interceptor,注册即可。
importjava.util.List; importorg.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean; importorg.springframework.boot.web.filter.OrderedCharacterEncodingFilter; importorg.springframework.context.annotation.Bean; importorg.springframework.context.annotation.Configuration; importorg.springframework.http.converter.HttpMessageConverter; importorg.springframework.web.filter.CharacterEncodingFilter; importorg.springframework.web.servlet.config.annotation.InterceptorRegistry; importorg.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; importorg.springframework.web.servlet.config.annotation.ViewControllerRegistry; importorg.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; importcom.vnierlai.scm.webapp.interceptor.PerformanceInterceptor; @Configuration publicclassWebMvcConfigurerextendsWebMvcConfigurerAdapter{ @Bean @ConditionalOnMissingBean(CharacterEncodingFilter.class) publicCharacterEncodingFiltercharacterEncodingFilter(){ CharacterEncodingFilterfilter=newOrderedCharacterEncodingFilter(); filter.setEncoding("UTF-8"); returnfilter; } @Override publicvoidaddInterceptors(InterceptorRegistryregistry){ registry.addInterceptor(newPerformanceInterceptor()).addPathPatterns("/**"); super.addInterceptors(registry); } @Override publicvoidaddResourceHandlers(ResourceHandlerRegistryregistry){ registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/"); //registry.addResourceHandler("/resources/**").addResourceLocations("/resources/"); } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持毛票票。