アクセス時間をテストするFilter

今日はあるリソースにアクセスするのにどれだけの時間がかかるかをテストするフィルタを書きました.

  package com.own.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CalculateTimeFilter implements Filter {

	public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain)throws ServletException,IOException{
		// 
		long beginTime = System.currentTimeMillis();
		// 
		HttpServletRequest httpRequest = (HttpServletRequest) request;
		HttpServletResponse httpResponse = (HttpServletResponse) response;
		chain.doFilter(httpRequest, httpResponse);
		long endTime = System.currentTimeMillis();
		long costTime = endTime - beginTime;
		System.out.println(" "+httpRequest.getRequestURI()+" "+costTime+" ");
	    //httpResponse.sendRedirect("bb.jsp");
	}

	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub
		System.out.println("filter is initialized");
	}
	
	
}

ここではデータベースに時間をかけて記録することもできます