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<Long> startTimeThreadLocal = new NamedThreadLocal<Long>("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<T> extends ThreadLocal<T> {

									  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/");

									  }

									}

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服务器之家。

原文链接：http://www.school1024.com/spring-framework/spring-mvc-interceptor-%E5%AE%9E%E7%8E%B0%E6%80%A7%E8%83%BD%E7%9B%91%E6%8E%A7.html?utm_source=tuicool&utm_medium=referral

Spring MVC Interceptor 实现性能监控的功能代码

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