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Spring MVC Interceptor 实现性能监控的功能代码
类别:Java编程   作者:码皇   来源:互联网   点击:

本篇文章主要介绍了Spring MVC Interceptor 实现性能监控的功能代码,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

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;
    @Configurationpublic 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脚本之家。

相关热词搜索: Spring MVC 性能监控 Spring MVC Intercep