Spring Chapter11 [16-3]

로그 기록

Log4j 

 

로깅 유틸리티 Log4j

 

Log4j의 구조와 로깅 레벨

1.logger

2.appender

3.layout

로그 환경 설정 파일의 구성

인터셉터

인터셉터

인터셉터 등록

인터셉터를 이용한 로그 기록

HandlerInterceptor

---

HandlerInterceptor를 사용해 로그 기록하기

pom.xml

log4j.xml

src/main/resources/log4j.xml

MonitoringInterceptor.java

package com.springmvc.interceptor;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StopWatch;
import org.springframework.web.servlet.HandlerInterceptor;

public class MonitoringInterceptor implements HandlerInterceptor{

	ThreadLocal<StopWatch> stopWatchLocal = new ThreadLocal<StopWatch>();
	
	public Logger logger = LoggerFactory.getLogger(this.getClass());
	
	public boolean preHandle
	(HttpServletRequest request,
			HttpServletResponse response,
			Object handler) throws Exception
	{
		StopWatch stopWatch = new StopWatch(handler.toString());
				stopWatch.start(handler.toString());
				stopWatchLocal.set(stopWatch);
				logger.info("접근한 URI 경로 :" + getURLPath(request) );
				logger.info("요청 처리 시작 시간 : "+ getCurrentTime());
		return true;
		
	}
	
	private String getCurrentTime() {
		// TODO Auto-generated method stub
		DateFormat formatter = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
		Calendar calendar = Calendar.getInstance();
		calendar.setTimeInMillis(System.currentTimeMillis());
		return formatter.format(calendar.getTime());
	}


	private String getURLPath(HttpServletRequest request) {
		// TODO Auto-generated method stub
		String currentPath = request.getRequestURI();
		String queryString = request.getQueryString();
		queryString = queryString == null ? "" : "?" + queryString;
		return currentPath + queryString;
	}

	public void postHandle(HttpServletRequest arg0, HttpServletResponse response,
			Object handler,Exception exception) throws Exception
	{
		StopWatch stopWatch = stopWatchLocal.get();
		stopWatch.stop();
		logger.info("요청 처리 소요 시간 : "+ stopWatch.getTotalTimeMillis() + "ms");
		stopWatchLocal.set(null);
		logger.info("======================");
	}
	
	public void afterCompletion(HttpServletRequest request,
			HttpServletResponse response,
			Object handler,
			Exception exception) throws Exception
	{
		StopWatch stopWatch = stopWatchLocal.get();
		stopWatch.stop();
		logger.info("요청 처리 소요 시간 : " + stopWatch.getTotalTimeMillis() + "ms");
		stopWatchLocal.set(null);
		logger.info("====================================");
	}
	
}

servlet-context.xml

파일로 로그 기록 출력하기