Дано
MVC-конфигурация с контроллерами и статическими ресурсами, которые не проходят через DispatcherServlet.
Требуется
"Перехватить" вызовы статических ресурсов (например, для подсчёта количества обращений к ним, времени, которое требуется на отдачу сервером и т.п.)
Конфигурация
web.xml:
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>testServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>testServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
applicationContext.xml
<!-- статические ресурсы (которые не должны проходить через DispatcherServlet) -->
<mvc:resources mapping="/static/**" location="/static/"/>
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/js/*"/>
<bean class="ru.pevgen.test.RequestProcessingTimeInterceptor" />
</mvc:interceptor>
</mvc:interceptors>
RequestProcessingTimeInterceptor.java
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
public class RequestProcessingTimeInterceptor extends HandlerInterceptorAdapter {
private static final Logger logger = LoggerFactory.getLogger(RequestProcessingTimeInterceptor.class);
@Override
public boolean preHandle(HttpServletRequest request,
HttpServletResponse response, Object handler) throws Exception {
long startTime = System.currentTimeMillis();
logger.info("Request URL::" + request.getRequestURL().toString()
+ ":: Start Time=" + System.currentTimeMillis());
request.setAttribute("startTime", startTime);
//if returned false, we need to make sure 'response' is sent
return true;
}
@Override
public void postHandle(HttpServletRequest request,
HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
System.out.println("Request URL::" + request.getRequestURL().toString()
+ " Sent to Handler :: Current Time=" + System.currentTimeMillis());
//we can add attributes in the modelAndView and use that in the view page
}
@Override
public void afterCompletion(HttpServletRequest request,
HttpServletResponse response, Object handler, Exception ex)
throws Exception {
long startTime = (Long) request.getAttribute("startTime");
logger.info("Request URL::" + request.getRequestURL().toString()
+ ":: End Time=" + System.currentTimeMillis());
logger.info("Request URL::" + request.getRequestURL().toString()
+ ":: Time Taken=" + (System.currentTimeMillis() - startTime));
}
}
Пример честно содран отсюда: http://www.journaldev.com/2676/spring-mvc-interceptors-example-handlerinterceptor-and-handlerinterceptoradapter
Я использовал spring 3.2.2, на остальных не проверял
