Logger.java

/*
 * This file is part of "SnipSnap Radeox Rendering Engine".
 *
 * Copyright (c) 2002 Stephan J. Schmidt, Matthias L. Jugel
 * All Rights Reserved.
 *
 * Please visit http://radeox.org/ for updates and contact.
 *
 * --LICENSE NOTICE--
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * --LICENSE NOTICE--
 */

package org.radeox.util.logging;

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

/**
 * Logger for logging events. Logger uses al LoggerImplementation for logging
 * concrete logging, e.g. SystemOutLogger
 * 
 * @author stephan
 * @version $Id: Logger.java 7756 2006-04-13 12:25:49Z ian@caret.cam.ac.uk $
 */

public class Logger
{
	// private static LogHandler handler = new ApplicationLogger();
	private static LogHandler handler = new SystemErrLogger();

	public final static boolean PRINT_STACKTRACE = true;

	public final static DateFormat format = new SimpleDateFormat("hh:mm:ss.SSS");

	public final static int ALL = -1;

	public final static int NONE = 4;

	public final static int PERF = 0;

	public final static int DEBUG = 1;

	public final static int WARN = 2;

	public final static int FATAL = 3;

	public final static int LEVEL = ALL;

	public final static String[] levels = { "PERF  ", "DEBUG ", "WARN  ",
			"FATAL " };

	public static void log(String output)
	{
		if (LEVEL <= DEBUG) log(Logger.DEBUG, output);
	}

	public static void perf(String output)
	{
		if (LEVEL <= PERF) log(Logger.PERF, output);
	}

	public static void debug(String output)
	{
		if (LEVEL <= DEBUG) log(Logger.DEBUG, output);
	}

	public static void warn(String output)
	{
		if (LEVEL <= WARN) log(Logger.WARN, output);
	}

	public static void warn(String output, Throwable e)
	{
		if (LEVEL <= WARN) log(Logger.WARN, output, e);
	}

	public static void fatal(String output)
	{
		if (LEVEL <= FATAL) log(Logger.WARN, output);
	}

	public static void fatal(String output, Exception e)
	{
		if (LEVEL <= FATAL) log(Logger.WARN, output, e);
	}

	public static void log(String output, Exception e)
	{
		if (LEVEL <= DEBUG) log(Logger.DEBUG, output, e);
	}

	public static void log(int level, String output)
	{
		handler.log(format.format(new Date()) + " " + levels[level] + " - "
				+ output);
	}

	public static void log(int level, String output, Throwable e)
	{
		handler.log(format.format(new Date()) + " " + levels[level] + " - "
				+ output + ": " + e.getMessage(), e);
	}

	public static void setHandler(LogHandler handler)
	{
		Logger.handler = handler;
	}
}