001/*-------------------------------------------------------------------------+
002|                                                                          |
003| Copyright 2005-2011 The ConQAT Project                                   |
004|                                                                          |
005| Licensed under the Apache License, Version 2.0 (the "License");          |
006| you may not use this file except in compliance with the License.         |
007| You may obtain a copy of the License at                                  |
008|                                                                          |
009|    http://www.apache.org/licenses/LICENSE-2.0                            |
010|                                                                          |
011| Unless required by applicable law or agreed to in writing, software      |
012| distributed under the License is distributed on an "AS IS" BASIS,        |
013| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
014| See the License for the specific language governing permissions and      |
015| limitations under the License.                                           |
016+-------------------------------------------------------------------------*/
017package org.conqat.lib.commons.logging;
018
019/**
020 * This interface describes loggers. This interface does not provide methods for
021 * logging message at FATAL level as such issues should be signaled with
022 * exceptions.
023 * 
024 * @author Florian Deissenboeck
025 * @author Elmar Juergens
026 */
027public interface ILogger {
028
029        /**
030         * Log message with level DEBUG.
031         * 
032         * @param message
033         *            log message.
034         */
035        public void debug(Object message);
036
037        /**
038         * Log message with level DEBUG.
039         * 
040         * @param message
041         *            log message
042         * @param throwable
043         *            {@link Throwable} to be logged
044         */
045        public void debug(Object message, Throwable throwable);
046
047        /**
048         * Log message with level INFO.
049         * 
050         * @param message
051         *            log message.
052         */
053        public void info(Object message);
054
055        /**
056         * Log message with level INFO.
057         * 
058         * @param message
059         *            log message
060         * @param throwable
061         *            {@link Throwable} to be logged
062         */
063        public void info(Object message, Throwable throwable);
064
065        /**
066         * Log message with level WARN.
067         * 
068         * @param message
069         *            log message.
070         */
071        public void warn(Object message);
072
073        /**
074         * Log message with level WARN.
075         * 
076         * @param message
077         *            log message
078         * @param throwable
079         *            {@link Throwable} to be logged
080         */
081        public void warn(Object message, Throwable throwable);
082
083        /**
084         * Log message with level ERROR.
085         * 
086         * @param message
087         *            log message.
088         */
089        public void error(Object message);
090
091        /**
092         * Log message with level ERROR.
093         * 
094         * @param message
095         *            log message
096         * @param throwable
097         *            {@link Throwable} to be logged
098         */
099        public void error(Object message, Throwable throwable);
100
101}