Spring MVC Interceptor 实现性能监控的功能代码

Spring MVC Interceptor 实现性能监控的功能代码

利用Spring MVC 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

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.core.NamedThreadLocal;

import org.springframework.web.servlet.HandlerInterceptor;

import org.springframework.web.servlet.ModelAndView;

public class PerformanceInterceptor implements HandlerInterceptor {

private final static Logger LOGGER = LoggerFactory.getLogger(PerformanceInterceptor.class);

private NamedThreadLocal startTimeThreadLocal = new NamedThreadLocal("performance");

@Override

public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)

throws Exception {

startTimeThreadLocal.set(System.currentTimeMillis());

return true;

}

@Override

public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,

ModelAndView modelAndView) throws Exception {

return;

}

@Override

public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)

throws Exception {

long currentTime = System.currentTimeMillis();

long executeTime = 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：

package org.springframework.core;

import org.springframework.util.Assert;

public class NamedThreadLocal extends ThreadLocal {

private final String name;

public NamedThreadLocal(String name) {

Assert.hasText(name, "Name must not be empty");

this.name = name;

}

@Override

public String toString() {

return this.name;

}

}

定义完Interceptor，注册即可。

import java.util.List;

import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;

import org.springframework.boot.web.filter.OrderedCharacterEncodingFilter;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.http.converter.HttpMessageConverter;

import org.springframework.web.filter.CharacterEncodingFilter;

import org.springframework.web.servlet.config.annotation.InterceptorRegistry;

import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;

import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;

import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import com.vnierlai.scm.webapp.interceptor.PerformanceInterceptor;

@Configuration

public class WebMvcConfigurer extends WebMvcConfigurerAdapter {

@Bean

@ConditionalOnMissingBean(CharacterEncodingFilter.class)

public CharacterEncodingFilter characterEncodingFilter() {

CharacterEncodingFilter filter = new OrderedCharacterEncodingFilter();

filter.setEncoding("UTF-8");

return filter;

}

@Override

public void addInterceptors(InterceptorRegistry registry) {

registry.addInterceptor(new PerformanceInterceptor()).addPathPatterns("/**");

super.addInterceptors(registry);

}

@Override

public void addResourceHandlers(ResourceHandlerRegistry registry) {

registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");

// registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");

}

}

版权声明：本文内容由网络用户投稿，版权归原作者所有，本站不拥有其著作权，亦不承担相应法律责任。如果您发现本站中有涉嫌抄袭或描述失实的内容，请联系我们jiasou666@gmail.com 处理，核实后本网站将在24小时内删除侵权内容。