java/copy-image-resizer/src/cz/frantovo/copyImageResizer/logging/AbstractInitializer.java
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/java/copy-image-resizer/src/cz/frantovo/copyImageResizer/logging/AbstractInitializer.java Mon Nov 17 21:58:52 2014 +0100
1.3 @@ -0,0 +1,76 @@
1.4 +/**
1.5 + * copy-image-resizer
1.6 + * Copyright © 2013 František Kučera (frantovo.cz)
1.7 + *
1.8 + * This program is free software: you can redistribute it and/or modify
1.9 + * it under the terms of the GNU General Public License as published by
1.10 + * the Free Software Foundation, either version 3 of the License, or
1.11 + * (at your option) any later version.
1.12 + *
1.13 + * This program is distributed in the hope that it will be useful,
1.14 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.15 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.16 + * GNU General Public License for more details.
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License
1.19 + * along with this program. If not, see <http://www.gnu.org/licenses/>.
1.20 + */
1.21 +package cz.frantovo.copyImageResizer.logging;
1.22 +
1.23 +import cz.frantovo.copyImageResizer.Constants;
1.24 +import java.util.logging.ConsoleHandler;
1.25 +import java.util.logging.Handler;
1.26 +import java.util.logging.Level;
1.27 +import java.util.logging.Logger;
1.28 +
1.29 +/**
1.30 + *
1.31 + * @author Ing. František Kučera (frantovo.cz)
1.32 + */
1.33 +public abstract class AbstractInitializer {
1.34 +
1.35 + private static final Logger log = Logger.getLogger(AbstractInitializer.class.getName());
1.36 +
1.37 + public static final String LEVEL_PROPERTY = AbstractInitializer.class.getName() + ".level";
1.38 + protected static final Level DEFAULT_LEVEL = Level.INFO;
1.39 +
1.40 + protected abstract AbstractFormatter createFormatter();
1.41 +
1.42 + public AbstractInitializer() {
1.43 + Logger logger = Logger.getLogger(Constants.JAVA_PACKAGE);
1.44 + ConsoleHandler handler = new ConsoleHandler();
1.45 + AbstractFormatter formatter = createFormatter();
1.46 +
1.47 + logger.addHandler(handler);
1.48 + handler.setFormatter(formatter);
1.49 +
1.50 + setLevel(logger, handler, formatter);
1.51 +
1.52 + /**
1.53 + * TODO: optional FileHandler – detailed logs in file in ~/sql-dk/log/…
1.54 + */
1.55 + }
1.56 +
1.57 + protected void setLevel(Logger logger, Handler handler, AbstractFormatter formatter) {
1.58 + boolean levelParseError = false;
1.59 + Level level;
1.60 + String cliLevel = System.getProperty(LEVEL_PROPERTY);
1.61 + if (cliLevel == null) {
1.62 + level = DEFAULT_LEVEL;
1.63 + } else {
1.64 + try {
1.65 + level = Level.parse(cliLevel);
1.66 + } catch (IllegalArgumentException e) {
1.67 + level = DEFAULT_LEVEL;
1.68 + levelParseError = true;
1.69 + }
1.70 + }
1.71 + handler.setLevel(level);
1.72 + logger.setLevel(level);
1.73 + if (levelParseError) {
1.74 + log.log(Level.WARNING, "Invalid logging level \u201e{0}\u201c specified in \u201e{1}\u201c \u2192 using default level \u201e{2}\u201c", new Object[]{cliLevel, LEVEL_PROPERTY, DEFAULT_LEVEL});
1.75 + }
1.76 + formatter.setPrintStacktrace(level.intValue() < Level.INFO.intValue());
1.77 + }
1.78 +
1.79 +}