    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 */
    017
    018package org.apache.commons.logging.impl;
    019
    020import java.io.PrintWriter;
    021import java.io.Serializable;
    022import java.io.StringWriter;
    023import java.util.StringTokenizer;
    024import java.util.logging.Level;
    025import java.util.logging.LogRecord;
    026import java.util.logging.Logger;
    027
    028import org.apache.commons.logging.Log;
    029
    030/**
    031 * Implementation of the {@code org.apache.commons.logging.Log}
    032 * interface that wraps the standard JDK logging mechanisms that are
    033 * available in SourceForge's Lumberjack for JDKs prior to 1.4.
    034 *
    035 * @since 1.1
    036 * @deprecated Scheduled for removal because the Lumberjack Project has been discontinued.
    037 */
    038@Deprecated
    039public class Jdk13LumberjackLogger implements Log, Serializable {
    040
    041    /** Serializable version identifier. */
    042    private static final long serialVersionUID = -8649807923527610591L;
    043
    044    /**
    045     * This member variable simply ensures that any attempt to initialize
    046     * this class in a pre-1.4 JVM will result in an ExceptionInInitializerError.
    047     * It must not be private, as an optimizing compiler could detect that it
    048     * is not used and optimize it away.
    049     *
    050     * @deprecated No longer used.
    051     */
    052    @Deprecated
    053    protected static final Level dummyLevel = Level.FINE;
    054
    055    /**
    056     * The underlying Logger implementation we are using.
    057     */
    058    protected transient Logger logger;
    059
    060    /**
    061     * Name.
    062     */
    063    protected String name;
    064
    065    /** Source class name. */
    066    private String sourceClassName = "unknown";
    067
    068    /** Source method name. */
    069    private String sourceMethodName = "unknown";
    070
    071    /** Class and method found flag. */
    072    private boolean classAndMethodFound;
    073
    074    /**
    075     * Constructs a named instance of this Logger.
    076     *
    077     * @param name Name of the logger to be constructed
    078     */
    079    public Jdk13LumberjackLogger(final String name) {
    080        this.name = name;
    081        logger = getLogger();
    082    }
    083
    084    /**
    085     * Logs a message with {@link java.util.logging.Level#FINE}.
    086     *
    087     * @param message to log
    088     * @see org.apache.commons.logging.Log#debug(Object)
    089     */
    090    @Override
    091    public void debug(final Object message) {
    092        log(Level.FINE, String.valueOf(message), null);
    093    }
    094
    095    /**
    096     * Logs a message with {@link java.util.logging.Level#FINE}.
    097     *
    098     * @param message to log
    099     * @param exception log this cause
    100     * @see org.apache.commons.logging.Log#debug(Object, Throwable)
    101     */
    102    @Override
    103    public void debug(final Object message, final Throwable exception) {
    104        log(Level.FINE, String.valueOf(message), exception);
    105    }
    106
    107    /**
    108     * Logs a message with {@link java.util.logging.Level#SEVERE}.
    109     *
    110     * @param message to log
    111     * @see org.apache.commons.logging.Log#error(Object)
    112     */
    113    @Override
    114    public void error(final Object message) {
    115        log(Level.SEVERE, String.valueOf(message), null);
    116    }
    117
    118    /**
    119     * Logs a message with {@link java.util.logging.Level#SEVERE}.
    120     *
    121     * @param message to log
    122     * @param exception log this cause
    123     * @see org.apache.commons.logging.Log#error(Object, Throwable)
    124     */
    125    @Override
    126    public void error(final Object message, final Throwable exception) {
    127        log(Level.SEVERE, String.valueOf(message), exception);
    128    }
    129
    130    /**
    131     * Logs a message with {@link java.util.logging.Level#SEVERE}.
    132     *
    133     * @param message to log
    134     * @see org.apache.commons.logging.Log#fatal(Object)
    135     */
    136    @Override
    137    public void fatal(final Object message) {
    138        log(Level.SEVERE, String.valueOf(message), null);
    139    }
    140
    141    /**
    142     * Logs a message with {@link java.util.logging.Level#SEVERE}.
    143     *
    144     * @param message to log
    145     * @param exception log this cause
    146     * @see org.apache.commons.logging.Log#fatal(Object, Throwable)
    147     */
    148    @Override
    149    public void fatal(final Object message, final Throwable exception) {
    150        log(Level.SEVERE, String.valueOf(message), exception);
    151    }
    152
    153    /**
    154     * Gets the class and method by looking at the stack trace for the
    155     * first entry that is not this class.
    156     */
    157    private void getClassAndMethod() {
    158        try {
    159            final Throwable throwable = new Throwable();
    160            throwable.fillInStackTrace();
    161            final StringWriter stringWriter = new StringWriter();
    162            final PrintWriter printWriter = new PrintWriter(stringWriter);
    163            throwable.printStackTrace(printWriter);
    164            final String traceString = stringWriter.getBuffer().toString();
    165            final StringTokenizer tokenizer = new StringTokenizer(traceString, "\n");
    166            tokenizer.nextToken();
    167            String line = tokenizer.nextToken();
    168            while (!line.contains(this.getClass().getName())) {
    169                line = tokenizer.nextToken();
    170            }
    171            while (line.contains(this.getClass().getName())) {
    172                line = tokenizer.nextToken();
    173            }
    174            final int start = line.indexOf("at ") + 3;
    175            final int end = line.indexOf('(');
    176            final String temp = line.substring(start, end);
    177            final int lastPeriod = temp.lastIndexOf('.');
    178            sourceClassName = temp.substring(0, lastPeriod);
    179            sourceMethodName = temp.substring(lastPeriod + 1);
    180        } catch (final Exception ex) {
    181            // ignore - leave class and methodname unknown
    182        }
    183        classAndMethodFound = true;
    184    }
    185
    186    /**
    187     * Gets the native Logger instance we are using.
    188     *
    189     * @return the native Logger instance we are using.
    190     */
    191    public Logger getLogger() {
    192        if (logger == null) {
    193            logger = Logger.getLogger(name);
    194        }
    195        return logger;
    196    }
    197
    198    /**
    199     * Logs a message with {@link java.util.logging.Level#INFO}.
    200     *
    201     * @param message to log
    202     * @see org.apache.commons.logging.Log#info(Object)
    203     */
    204    @Override
    205    public void info(final Object message) {
    206        log(Level.INFO, String.valueOf(message), null);
    207    }
    208
    209    /**
    210     * Logs a message with {@link java.util.logging.Level#INFO}.
    211     *
    212     * @param message to log
    213     * @param exception log this cause
    214     * @see org.apache.commons.logging.Log#info(Object, Throwable)
    215     */
    216    @Override
    217    public void info(final Object message, final Throwable exception) {
    218        log(Level.INFO, String.valueOf(message), exception);
    219    }
    220
    221    /**
    222     * Is debug logging currently enabled?
    223     */
    224    @Override
    225    public boolean isDebugEnabled() {
    226        return getLogger().isLoggable(Level.FINE);
    227    }
    228
    229    /**
    230     * Is error logging currently enabled?
    231     */
    232    @Override
    233    public boolean isErrorEnabled() {
    234        return getLogger().isLoggable(Level.SEVERE);
    235    }
    236
    237    /**
    238     * Is fatal logging currently enabled?
    239     */
    240    @Override
    241    public boolean isFatalEnabled() {
    242        return getLogger().isLoggable(Level.SEVERE);
    243    }
    244
    245    /**
    246     * Is info logging currently enabled?
    247     */
    248    @Override
    249    public boolean isInfoEnabled() {
    250        return getLogger().isLoggable(Level.INFO);
    251    }
    252
    253    /**
    254     * Is trace logging currently enabled?
    255     */
    256    @Override
    257    public boolean isTraceEnabled() {
    258        return getLogger().isLoggable(Level.FINEST);
    259    }
    260
    261    /**
    262     * Is warn logging currently enabled?
    263     */
    264    @Override
    265    public boolean isWarnEnabled() {
    266        return getLogger().isLoggable(Level.WARNING);
    267    }
    268
    269    private void log( final Level level, final String msg, final Throwable ex ) {
    270        if ( getLogger().isLoggable(level) ) {
    271            final LogRecord record = new LogRecord(level, msg);
    272            if ( !classAndMethodFound ) {
    273                getClassAndMethod();
    274            }
    275            record.setSourceClassName(sourceClassName);
    276            record.setSourceMethodName(sourceMethodName);
    277            if ( ex != null ) {
    278                record.setThrown(ex);
    279            }
    280            getLogger().log(record);
    281        }
    282    }
    283
    284    /**
    285     * Logs a message with {@link java.util.logging.Level#FINEST}.
    286     *
    287     * @param message to log
    288     * @see org.apache.commons.logging.Log#trace(Object)
    289     */
    290    @Override
    291    public void trace(final Object message) {
    292        log(Level.FINEST, String.valueOf(message), null);
    293    }
    294
    295    /**
    296     * Logs a message with {@link java.util.logging.Level#FINEST}.
    297     *
    298     * @param message to log
    299     * @param exception log this cause
    300     * @see org.apache.commons.logging.Log#trace(Object, Throwable)
    301     */
    302    @Override
    303    public void trace(final Object message, final Throwable exception) {
    304        log(Level.FINEST, String.valueOf(message), exception);
    305    }
    306
    307    /**
    308     * Logs a message with {@link java.util.logging.Level#WARNING}.
    309     *
    310     * @param message to log
    311     * @see org.apache.commons.logging.Log#warn(Object)
    312     */
    313    @Override
    314    public void warn(final Object message) {
    315        log(Level.WARNING, String.valueOf(message), null);
    316    }
    317
    318    /**
    319     * Logs a message with {@link java.util.logging.Level#WARNING}.
    320     *
    321     * @param message to log
    322     * @param exception log this cause
    323     * @see org.apache.commons.logging.Log#warn(Object, Throwable)
    324     */
    325    @Override
    326    public void warn(final Object message, final Throwable exception) {
    327        log(Level.WARNING, String.valueOf(message), exception);
    328    }
    329}