001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache license, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. 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.apache.logging.log4j.simple;
018
019import java.io.FileNotFoundException;
020import java.io.FileOutputStream;
021import java.io.PrintStream;
022import java.util.concurrent.ConcurrentHashMap;
023import java.util.concurrent.ConcurrentMap;
024
025import org.apache.logging.log4j.Level;
026import org.apache.logging.log4j.message.MessageFactory;
027import org.apache.logging.log4j.spi.AbstractLogger;
028import org.apache.logging.log4j.spi.ExtendedLogger;
029import org.apache.logging.log4j.spi.LoggerContext;
030import org.apache.logging.log4j.util.PropertiesUtil;
031
032/**
033 *
034 */
035public class SimpleLoggerContext implements LoggerContext {
036
037    /** The default format to use when formatting dates */
038    protected static final String DEFAULT_DATE_TIME_FORMAT = "yyyy/MM/dd HH:mm:ss:SSS zzz";
039
040    /** All system properties used by <code>SimpleLog</code> start with this */
041    protected static final String SYSTEM_PREFIX = "org.apache.logging.log4j.simplelog.";
042
043    private final PropertiesUtil props;
044
045    /** Include the instance name in the log message? */
046    private final boolean showLogName;
047    /**
048     * Include the short name ( last component ) of the logger in the log message. Defaults to true - otherwise we'll be
049     * lost in a flood of messages without knowing who sends them.
050     */
051    private final boolean showShortName;
052    /** Include the current time in the log message */
053    private final boolean showDateTime;
054    /** Include the ThreadContextMap in the log message */
055    private final boolean showContextMap;
056    /** The date and time format to use in the log message */
057    private final String dateTimeFormat;
058
059    private final Level defaultLevel;
060
061    private final PrintStream stream;
062
063    private final ConcurrentMap<String, ExtendedLogger> loggers = new ConcurrentHashMap<String, ExtendedLogger>();
064
065    public SimpleLoggerContext() {
066        props = new PropertiesUtil("log4j2.simplelog.properties");
067
068        showContextMap = props.getBooleanProperty(SYSTEM_PREFIX + "showContextMap", false);
069        showLogName = props.getBooleanProperty(SYSTEM_PREFIX + "showlogname", false);
070        showShortName = props.getBooleanProperty(SYSTEM_PREFIX + "showShortLogname", true);
071        showDateTime = props.getBooleanProperty(SYSTEM_PREFIX + "showdatetime", false);
072        final String lvl = props.getStringProperty(SYSTEM_PREFIX + "level");
073        defaultLevel = Level.toLevel(lvl, Level.ERROR);
074
075        dateTimeFormat = showDateTime ? props.getStringProperty(SimpleLoggerContext.SYSTEM_PREFIX + "dateTimeFormat",
076                DEFAULT_DATE_TIME_FORMAT) : null;
077
078        final String fileName = props.getStringProperty(SYSTEM_PREFIX + "logFile", "system.err");
079        PrintStream ps;
080        if ("system.err".equalsIgnoreCase(fileName)) {
081            ps = System.err;
082        } else if ("system.out".equalsIgnoreCase(fileName)) {
083            ps = System.out;
084        } else {
085            try {
086                final FileOutputStream os = new FileOutputStream(fileName);
087                ps = new PrintStream(os);
088            } catch (final FileNotFoundException fnfe) {
089                ps = System.err;
090            }
091        }
092        this.stream = ps;
093    }
094
095    @Override
096    public ExtendedLogger getLogger(final String name) {
097        return getLogger(name, null);
098    }
099
100    @Override
101    public ExtendedLogger getLogger(final String name, final MessageFactory messageFactory) {
102        if (loggers.containsKey(name)) {
103            final ExtendedLogger logger = loggers.get(name);
104            AbstractLogger.checkMessageFactory(logger, messageFactory);
105            return logger;
106        }
107
108        loggers.putIfAbsent(name, new SimpleLogger(name, defaultLevel, showLogName, showShortName, showDateTime,
109                showContextMap, dateTimeFormat, messageFactory, props, stream));
110        return loggers.get(name);
111    }
112
113    @Override
114    public boolean hasLogger(final String name) {
115        return false;
116    }
117
118    @Override
119    public Object getExternalContext() {
120        return null;
121    }
122}