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。