franta-hg@55: /**
franta-hg@55:  * SQL-DK
franta-hg@55:  * Copyright © 2013 František Kučera (frantovo.cz)
franta-hg@55:  *
franta-hg@55:  * This program is free software: you can redistribute it and/or modify
franta-hg@55:  * it under the terms of the GNU General Public License as published by
franta-hg@55:  * the Free Software Foundation, either version 3 of the License, or
franta-hg@55:  * (at your option) any later version.
franta-hg@55:  *
franta-hg@55:  * This program is distributed in the hope that it will be useful,
franta-hg@55:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
franta-hg@55:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
franta-hg@55:  * GNU General Public License for more details.
franta-hg@55:  *
franta-hg@55:  * You should have received a copy of the GNU General Public License
franta-hg@55:  * along with this program. If not, see <http://www.gnu.org/licenses/>.
franta-hg@55:  */
franta-hg@55: package info.globalcode.sql.dk.logging;
franta-hg@55: 
franta-hg@55: import info.globalcode.sql.dk.Constants;
franta-hg@55: import java.util.logging.ConsoleHandler;
franta-hg@58: import java.util.logging.Handler;
franta-hg@55: import java.util.logging.Level;
franta-hg@55: import java.util.logging.Logger;
franta-hg@55: 
franta-hg@55: /**
franta-hg@55:  * Configures logging subsystem.
franta-hg@55:  * Usage: java -Djava.util.logging.config.class=info.globalcode.sql.dk.logging.LoggerInitializer …
franta-hg@55:  *
franta-hg@55:  * @author Ing. František Kučera (frantovo.cz)
franta-hg@55:  */
franta-hg@55: public class LoggerInitializer {
franta-hg@55: 
franta-hg@58: 	private static final Logger log = Logger.getLogger(LoggerInitializer.class.getName());
franta-hg@58: 	public static final String LEVEL_PROPERTY = LoggerInitializer.class.getName() + ".level";
franta-hg@58: 	private static final Level DEFAULT_LEVEL = Level.INFO;
franta-hg@58: 
franta-hg@55: 	public LoggerInitializer() {
franta-hg@55: 		Logger logger = Logger.getLogger(Constants.JAVA_PACKAGE);
franta-hg@55: 		ConsoleHandler handler = new ConsoleHandler();
franta-hg@55: 		ColorfulConsoleFormatter formatter = new ColorfulConsoleFormatter();
franta-hg@55: 
franta-hg@55: 		logger.addHandler(handler);
franta-hg@55: 		handler.setFormatter(formatter);
franta-hg@55: 
franta-hg@59: 		setLevel(logger, handler, formatter);
franta-hg@55: 
franta-hg@55: 
franta-hg@55: 		/**
franta-hg@155: 		 * TODO: optional FileHandler – detailed logs in file in ~/sql-dk/log/…
franta-hg@55: 		 */
franta-hg@55: 	}
franta-hg@58: 
franta-hg@59: 	private void setLevel(Logger logger, Handler handler, ColorfulConsoleFormatter formatter) {
franta-hg@58: 		boolean levelParseError = false;
franta-hg@58: 		Level level;
franta-hg@58: 		String cliLevel = System.getProperty(LEVEL_PROPERTY);
franta-hg@58: 		if (cliLevel == null) {
franta-hg@58: 			level = DEFAULT_LEVEL;
franta-hg@58: 		} else {
franta-hg@58: 			try {
franta-hg@58: 				level = Level.parse(cliLevel);
franta-hg@58: 			} catch (IllegalArgumentException e) {
franta-hg@58: 				level = DEFAULT_LEVEL;
franta-hg@58: 				levelParseError = true;
franta-hg@58: 			}
franta-hg@58: 		}
franta-hg@58: 
franta-hg@58: 		handler.setLevel(level);
franta-hg@58: 		logger.setLevel(level);
franta-hg@58: 
franta-hg@58: 		if (levelParseError) {
franta-hg@58: 			log.log(Level.WARNING, "Invalid logging level „{0}“ specified in „{1}“ → using default level „{2}“", new Object[]{cliLevel, LEVEL_PROPERTY, DEFAULT_LEVEL});
franta-hg@58: 		}
franta-hg@59: 
franta-hg@59: 		formatter.setPrintStacktrace(level.intValue() < Level.INFO.intValue());
franta-hg@58: 	}
franta-hg@55: }