한번에 한가지씩. 선택과 집중.

package kineo2k.common.log.test;

import java.io.*;
import org.apache.log4j.*;

public class LogTest2
{
    private static final String MESSAGE = "테스트TEST1234!@#$";

    public static long writePrintWriter() throws Exception
    {
        PrintWriter pw = new PrintWriter("C:\\test_printwriter.log");

        long start = System.nanoTime();

        for(int i=0; i<1000000; i++)
        {
            pw.println(MESSAGE);
            pw.flush();
        }

        return System.nanoTime()-start;
    }

    public static long writeLog4j() throws Exception
    {
        Logger logger = Logger.getLogger(LogTest2.class);
        String pattern = "%m%n";
        PatternLayout layout = new PatternLayout(pattern);
        FileAppender appender = new FileAppender(layout, "C:\\test_log4j.log");
        logger.addAppender(appender);

        long start = System.nanoTime();

        for(int i=0; i<1000000; i++)
            logger.debug(MESSAGE);

        return System.nanoTime()-start;
    }

    public static void main(String[] args) throws Exception
    {
        System.out.println("PrintWriter 사용시 : "+((double)writePrintWriter()/1000000000)+" sec");
        System.out.println("Log4j 사용시 : "+((double)writeLog4j()/1000000000)+" sec");
    }
}

package kineo2k.common.log;
/**
 * Caller의 정보를 받아오기 위한 클래스
 * @author kineo2k (kineo2k@gmail.com)
 */
public class LocationInfo
{
 private String caller  = null;
 private String fileName  = null;
 private String className = null;
 private String methodName = null;
 private int lineNumber  = 0x00;
 
 /**
  * 예외 객체를 받아서 Caller 정보를 만든다.
  * @param t
  */
 public LocationInfo(Throwable t)
 {
  StackTraceElement element = t.getStackTrace()[1];
 
  this.fileName = element.getFileName();
  this.className = element.getClassName();
  this.methodName = element.getMethodName();
  this.lineNumber = element.getLineNumber();
  this.caller  = new StringBuilder(this.className)
      .append(".")
      .append(this.methodName)
      .append("(")
      .append(this.fileName)
      .append(":")
      .append(this.lineNumber)
      .append(")")
      .toString();
 }
 
 /**
  * @return package.Class.Method(FileName.java:Line)
  */
 public String getCaller()
 {
  return this.caller;
 }
 
 public String getFileName()
 {
  return this.getFileName();
 }
 
 public String getClassName()
 {
  return this.className;
 }
 
 public String getMethodName()
 {
  return this.methodName;
 }
 
 public int getLineNumber()
 {
  return this.lineNumber;
 }
}