ru.dmerkushov.loghelper.log4j.connect.WriteLog4jToJulAppender Maven / Gradle / Ivy

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A library to help use different logging frameworks, such as java.util.logging (JUL) and Apache Log4j, even together. See also https://github.com/dmerkushov/log-helper-examples

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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package ru.dmerkushov.loghelper.log4j.connect;

import ru.dmerkushov.loghelper.*;
import java.util.logging.Level;

/**
 *
 * @author Dmitriy Merkushov
 */
public class WriteLog4jToJulAppender extends org.apache.log4j.AppenderSkeleton {

	LoggerWrapper loggerWrapper;

	public WriteLog4jToJulAppender (LoggerWrapper loggerWrapper) {
		this.loggerWrapper = loggerWrapper;
	}

	@Override
	protected void append (org.apache.log4j.spi.LoggingEvent event) {
		org.apache.log4j.spi.LocationInfo locationInfo = event.getLocationInformation ();
		String className = locationInfo.getClassName ();
		String methodName = locationInfo.getMethodName () + "():" + locationInfo.getLineNumber ();

		String msg;
		Object msgObj = event.getMessage ();
		
		if (msgObj == null) {
			msgObj = "null";
		}
		
		boolean isThrowable = msgObj instanceof Throwable;
		
		if (isThrowable) {
			msg = "Log4j message on Throwable: " + ((Throwable) msgObj).getMessage ();
		} else {
			msg = "Log4j message: " + (String) msgObj;
		}

		org.apache.log4j.Level level = event.getLevel ();
		Level julLevel = LoggerWrapper.getJULLevelFromLog4j (level);

		if (isThrowable) {
			loggerWrapper.getLogger ().logp (julLevel, className, methodName, msg, (Throwable) msgObj);
		} else {
			loggerWrapper.getLogger ().logp (julLevel, className, methodName, msg);
		}
	}

	@Override
	public void close () {
		this.closed = true;
	}

	@Override
	public boolean requiresLayout () {
		return false;
	}
}