문서의 이전 판입니다!
아래는 %h 패턴을 사용하여 호스트이름을 로그로 남겨줄 수 있도록 하는 PatternLayout 확장이다.
package kr.pe.kwonnam.log4j.pattern; import java.net.InetAddress; import java.net.UnknownHostException; import org.apache.log4j.PatternLayout; import org.apache.log4j.helpers.PatternConverter; import org.apache.log4j.helpers.PatternParser; import org.apache.log4j.spi.LoggingEvent; public class HostnamePatternLayout extends PatternLayout { public static final char HOSTNAME_PATTERN_CHAR = 'h'; protected static final String HOSTNAME; static { HOSTNAME = getHostname(); } protected static String getHostname() { try { InetAddress addr = InetAddress.getLocalHost(); return addr.getHostName(); } catch (UnknownHostException ex) { return "unknown"; } } @Override protected PatternParser createPatternParser(String pattern) { return new PatternParser(pattern) { @Override protected void finalizeConverter(char c) { PatternConverter pc = null; switch (c) { case HOSTNAME_PATTERN_CHAR: pc = new PatternConverter() { @Override protected String convert(LoggingEvent event) { return HOSTNAME; } }; break; } if (pc == null) { super.finalizeConverter(c); } else { addConverter(pc); } } }; } }
실제 사용하기는 properties 방식은 다음과 같고,
log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=kr.pe.kwonnam.log4j.pattern.HostnamePatternLayout
XML 방식은 다음과 같다.
<appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender"> <layout class="kr.pe.kwonnam.log4j.pattern.HostnamePatternLayout"> <param name="ConversionPattern" value="%d %p %h %u [%c] - %m %n"/> </layout> </appender>