Ceki Gulcu | 054ed39 | 2011-10-16 22:53:17 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2001-2004 The Apache Software Foundation. |
Ceki Gulcu | 7ba0605 | 2011-10-16 10:28:44 +0200 | [diff] [blame] | 3 | * |
Ceki Gulcu | 054ed39 | 2011-10-16 22:53:17 +0200 | [diff] [blame] | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
Ceki Gulcu | 7ba0605 | 2011-10-16 10:28:44 +0200 | [diff] [blame] | 7 | * |
Ceki Gulcu | 054ed39 | 2011-10-16 22:53:17 +0200 | [diff] [blame] | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
Ceki Gulcu | 7ba0605 | 2011-10-16 10:28:44 +0200 | [diff] [blame] | 9 | * |
Ceki Gulcu | 054ed39 | 2011-10-16 22:53:17 +0200 | [diff] [blame] | 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 15 | */ |
Ceki Gulcu | 054ed39 | 2011-10-16 22:53:17 +0200 | [diff] [blame] | 16 | |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 17 | package org.apache.commons.logging.impl; |
| 18 | |
| 19 | import java.io.InputStream; |
| 20 | import java.io.Serializable; |
| 21 | import java.lang.reflect.InvocationTargetException; |
| 22 | import java.lang.reflect.Method; |
| 23 | import java.security.AccessController; |
| 24 | import java.security.PrivilegedAction; |
| 25 | import java.text.DateFormat; |
| 26 | import java.text.SimpleDateFormat; |
| 27 | import java.util.Date; |
| 28 | import java.util.Properties; |
| 29 | |
| 30 | import org.apache.commons.logging.Log; |
| 31 | import org.apache.commons.logging.LogConfigurationException; |
| 32 | |
| 33 | /** |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 34 | * <p> |
| 35 | * Simple implementation of Log that sends all enabled log messages, for all |
| 36 | * defined loggers, to System.err. The following system properties are supported |
| 37 | * to configure the behavior of this logger: |
| 38 | * </p> |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 39 | * <ul> |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 40 | * <li><code>org.apache.commons.logging.simplelog.defaultlog</code> - Default |
| 41 | * logging detail level for all instances of SimpleLog. Must be one of ("trace", |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 42 | * "debug", "info", "warn", "error", or "fatal"). If not specified, defaults to |
| 43 | * "info".</li> |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 44 | * <li><code>org.apache.commons.logging.simplelog.log.xxxxx</code> - Logging |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 45 | * detail level for a SimpleLog instance named "xxxxx". Must be one of ("trace", |
| 46 | * "debug", "info", "warn", "error", or "fatal"). If not specified, the default |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 47 | * logging detail level is used.</li> |
| 48 | * <li><code>org.apache.commons.logging.simplelog.showlogname</code> - Set to |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 49 | * <code>true</code> if you want the Log instance name to be included in output |
| 50 | * messages. Defaults to <code>false</code>.</li> |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 51 | * <li><code>org.apache.commons.logging.simplelog.showShortLogname</code> - Set |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 52 | * to <code>true</code> if you want the last component of the name to be |
| 53 | * included in output messages. Defaults to <code>true</code>.</li> |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 54 | * <li><code>org.apache.commons.logging.simplelog.showdatetime</code> - Set to |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 55 | * <code>true</code> if you want the current date and time to be included in |
| 56 | * output messages. Default is <code>false</code>.</li> |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 57 | * <li><code>org.apache.commons.logging.simplelog.dateTimeFormat</code> - The |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 58 | * date and time format to be used in the output messages. The pattern |
| 59 | * describing the date and time format is the same that is used in |
| 60 | * <code>java.text.SimpleDateFormat</code>. If the format is not specified or is |
| 61 | * invalid, the default format is used. The default format is |
| 62 | * <code>yyyy/MM/dd HH:mm:ss:SSS zzz</code>.</li> |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 63 | * </ul> |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 64 | * |
| 65 | * <p> |
| 66 | * In addition to looking for system properties with the names specified above, |
| 67 | * this implementation also checks for a class loader resource named |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 68 | * <code>"simplelog.properties"</code>, and includes any matching definitions |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 69 | * from this resource (if it exists). |
| 70 | * </p> |
| 71 | * |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 72 | * @author <a href="mailto:sanders@apache.org">Scott Sanders</a> |
| 73 | * @author Rod Waldhoff |
| 74 | * @author Robert Burrell Donkin |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 75 | * |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 76 | * @version $Id: SimpleLog.java,v 1.21 2004/06/06 20:47:56 rdonkin Exp $ |
| 77 | */ |
| 78 | public class SimpleLog implements Log, Serializable { |
| 79 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 80 | private static final long serialVersionUID = 136942970684951178L; |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 81 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 82 | // ------------------------------------------------------- Class Attributes |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 83 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 84 | /** All system properties used by <code>SimpleLog</code> start with this */ |
| 85 | static protected final String systemPrefix = "org.apache.commons.logging.simplelog."; |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 86 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 87 | /** Properties loaded from simplelog.properties */ |
| 88 | static protected final Properties simpleLogProps = new Properties(); |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 89 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 90 | /** The default format to use when formating dates */ |
| 91 | static protected final String DEFAULT_DATE_TIME_FORMAT = "yyyy/MM/dd HH:mm:ss:SSS zzz"; |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 92 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 93 | /** Include the instance name in the log message? */ |
| 94 | static protected boolean showLogName = false; |
| 95 | /** |
| 96 | * Include the short name ( last component ) of the logger in the log message. |
| 97 | * Defaults to true - otherwise we'll be lost in a flood of messages without |
| 98 | * knowing who sends them. |
| 99 | */ |
| 100 | static protected boolean showShortName = true; |
| 101 | /** Include the current time in the log message */ |
| 102 | static protected boolean showDateTime = false; |
| 103 | /** The date and time format to use in the log message */ |
| 104 | static protected String dateTimeFormat = DEFAULT_DATE_TIME_FORMAT; |
| 105 | /** Used to format times */ |
| 106 | static protected DateFormat dateFormatter = null; |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 107 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 108 | // ---------------------------------------------------- Log Level Constants |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 109 | |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 110 | /** "Trace" level logging. */ |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 111 | public static final int LOG_LEVEL_TRACE = 1; |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 112 | /** "Debug" level logging. */ |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 113 | public static final int LOG_LEVEL_DEBUG = 2; |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 114 | /** "Info" level logging. */ |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 115 | public static final int LOG_LEVEL_INFO = 3; |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 116 | /** "Warn" level logging. */ |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 117 | public static final int LOG_LEVEL_WARN = 4; |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 118 | /** "Error" level logging. */ |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 119 | public static final int LOG_LEVEL_ERROR = 5; |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 120 | /** "Fatal" level logging. */ |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 121 | public static final int LOG_LEVEL_FATAL = 6; |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 122 | |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 123 | /** Enable all logging levels */ |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 124 | public static final int LOG_LEVEL_ALL = (LOG_LEVEL_TRACE - 1); |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 125 | |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 126 | /** Enable no logging levels */ |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 127 | public static final int LOG_LEVEL_OFF = (LOG_LEVEL_FATAL + 1); |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 128 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 129 | // ------------------------------------------------------------ Initializer |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 130 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 131 | private static String getStringProperty(String name) { |
| 132 | String prop = null; |
| 133 | try { |
| 134 | prop = System.getProperty(name); |
| 135 | } catch (SecurityException e) { |
| 136 | ; // Ignore |
| 137 | } |
| 138 | return (prop == null) ? simpleLogProps.getProperty(name) : prop; |
| 139 | } |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 140 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 141 | private static String getStringProperty(String name, String dephault) { |
| 142 | String prop = getStringProperty(name); |
| 143 | return (prop == null) ? dephault : prop; |
| 144 | } |
| 145 | |
| 146 | private static boolean getBooleanProperty(String name, boolean dephault) { |
| 147 | String prop = getStringProperty(name); |
| 148 | return (prop == null) ? dephault : "true".equalsIgnoreCase(prop); |
| 149 | } |
| 150 | |
| 151 | // Initialize class attributes. |
| 152 | // Load properties file, if found. |
| 153 | // Override with system properties. |
| 154 | static { |
| 155 | // Add props from the resource simplelog.properties |
| 156 | InputStream in = getResourceAsStream("simplelog.properties"); |
| 157 | if (null != in) { |
| 158 | try { |
| 159 | simpleLogProps.load(in); |
| 160 | in.close(); |
| 161 | } catch (java.io.IOException e) { |
| 162 | // ignored |
| 163 | } |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 164 | } |
| 165 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 166 | showLogName = getBooleanProperty(systemPrefix + "showlogname", showLogName); |
| 167 | showShortName = getBooleanProperty(systemPrefix + "showShortLogname", |
| 168 | showShortName); |
| 169 | showDateTime = getBooleanProperty(systemPrefix + "showdatetime", |
| 170 | showDateTime); |
| 171 | |
| 172 | if (showDateTime) { |
| 173 | dateTimeFormat = getStringProperty(systemPrefix + "dateTimeFormat", |
| 174 | dateTimeFormat); |
| 175 | try { |
| 176 | dateFormatter = new SimpleDateFormat(dateTimeFormat); |
| 177 | } catch (IllegalArgumentException e) { |
| 178 | // If the format pattern is invalid - use the default format |
| 179 | dateTimeFormat = DEFAULT_DATE_TIME_FORMAT; |
| 180 | dateFormatter = new SimpleDateFormat(dateTimeFormat); |
| 181 | } |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | // ------------------------------------------------------------- Attributes |
| 186 | |
| 187 | /** The name of this simple log instance */ |
| 188 | protected String logName = null; |
| 189 | /** The current log level */ |
| 190 | protected int currentLogLevel; |
| 191 | /** The short name of this simple log instance */ |
| 192 | private String shortLogName = null; |
| 193 | |
| 194 | // ------------------------------------------------------------ Constructor |
| 195 | |
| 196 | /** |
| 197 | * Construct a simple log with given name. |
| 198 | * |
| 199 | * @param name |
| 200 | * log name |
| 201 | */ |
| 202 | public SimpleLog(String name) { |
| 203 | |
| 204 | logName = name; |
| 205 | |
| 206 | // Set initial log level |
| 207 | // Used to be: set default log level to ERROR |
| 208 | // IMHO it should be lower, but at least info ( costin ). |
| 209 | setLevel(SimpleLog.LOG_LEVEL_INFO); |
| 210 | |
| 211 | // Set log level from properties |
| 212 | String lvl = getStringProperty(systemPrefix + "log." + logName); |
| 213 | int i = String.valueOf(name).lastIndexOf("."); |
| 214 | while (null == lvl && i > -1) { |
| 215 | name = name.substring(0, i); |
| 216 | lvl = getStringProperty(systemPrefix + "log." + name); |
| 217 | i = String.valueOf(name).lastIndexOf("."); |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 218 | } |
| 219 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 220 | if (null == lvl) { |
| 221 | lvl = getStringProperty(systemPrefix + "defaultlog"); |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 222 | } |
| 223 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 224 | if ("all".equalsIgnoreCase(lvl)) { |
| 225 | setLevel(SimpleLog.LOG_LEVEL_ALL); |
| 226 | } else if ("trace".equalsIgnoreCase(lvl)) { |
| 227 | setLevel(SimpleLog.LOG_LEVEL_TRACE); |
| 228 | } else if ("debug".equalsIgnoreCase(lvl)) { |
| 229 | setLevel(SimpleLog.LOG_LEVEL_DEBUG); |
| 230 | } else if ("info".equalsIgnoreCase(lvl)) { |
| 231 | setLevel(SimpleLog.LOG_LEVEL_INFO); |
| 232 | } else if ("warn".equalsIgnoreCase(lvl)) { |
| 233 | setLevel(SimpleLog.LOG_LEVEL_WARN); |
| 234 | } else if ("error".equalsIgnoreCase(lvl)) { |
| 235 | setLevel(SimpleLog.LOG_LEVEL_ERROR); |
| 236 | } else if ("fatal".equalsIgnoreCase(lvl)) { |
| 237 | setLevel(SimpleLog.LOG_LEVEL_FATAL); |
| 238 | } else if ("off".equalsIgnoreCase(lvl)) { |
| 239 | setLevel(SimpleLog.LOG_LEVEL_OFF); |
| 240 | } |
| 241 | |
| 242 | } |
| 243 | |
| 244 | // -------------------------------------------------------- Properties |
| 245 | |
| 246 | /** |
| 247 | * <p> |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 248 | * Set logging level. |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 249 | * </p> |
| 250 | * |
| 251 | * @param currentLogLevel |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 252 | * new logging level |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 253 | */ |
| 254 | public void setLevel(int currentLogLevel) { |
| 255 | |
| 256 | this.currentLogLevel = currentLogLevel; |
| 257 | |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * <p> |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 262 | * Get logging level. |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 263 | * </p> |
| 264 | */ |
| 265 | public int getLevel() { |
| 266 | |
| 267 | return currentLogLevel; |
| 268 | } |
| 269 | |
| 270 | // -------------------------------------------------------- Logging Methods |
| 271 | |
| 272 | /** |
| 273 | * <p> |
Ceki Gulcu | 9f10490 | 2010-10-19 17:22:20 +0200 | [diff] [blame] | 274 | * Do the actual logging. This method assembles the message and then calls |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 275 | * <code>write()</code> to cause it to be written. |
| 276 | * </p> |
| 277 | * |
| 278 | * @param type |
| 279 | * One of the LOG_LEVEL_XXX constants defining the log level |
| 280 | * @param message |
| 281 | * The message itself (typically a String) |
| 282 | * @param t |
| 283 | * The exception whose stack trace should be logged |
| 284 | */ |
| 285 | protected void log(int type, Object message, Throwable t) { |
| 286 | // Use a string buffer for better performance |
| 287 | StringBuffer buf = new StringBuffer(); |
| 288 | |
| 289 | // Append date-time if so configured |
| 290 | if (showDateTime) { |
| 291 | buf.append(dateFormatter.format(new Date())); |
| 292 | buf.append(" "); |
| 293 | } |
| 294 | |
| 295 | // Append a readable representation of the log level |
| 296 | switch (type) { |
| 297 | case SimpleLog.LOG_LEVEL_TRACE: |
| 298 | buf.append("[TRACE] "); |
| 299 | break; |
| 300 | case SimpleLog.LOG_LEVEL_DEBUG: |
| 301 | buf.append("[DEBUG] "); |
| 302 | break; |
| 303 | case SimpleLog.LOG_LEVEL_INFO: |
| 304 | buf.append("[INFO] "); |
| 305 | break; |
| 306 | case SimpleLog.LOG_LEVEL_WARN: |
| 307 | buf.append("[WARN] "); |
| 308 | break; |
| 309 | case SimpleLog.LOG_LEVEL_ERROR: |
| 310 | buf.append("[ERROR] "); |
| 311 | break; |
| 312 | case SimpleLog.LOG_LEVEL_FATAL: |
| 313 | buf.append("[FATAL] "); |
| 314 | break; |
| 315 | } |
| 316 | |
| 317 | // Append the name of the log instance if so configured |
| 318 | if (showShortName) { |
| 319 | if (shortLogName == null) { |
| 320 | // Cut all but the last component of the name for both styles |
| 321 | shortLogName = logName.substring(logName.lastIndexOf(".") + 1); |
| 322 | shortLogName = shortLogName |
| 323 | .substring(shortLogName.lastIndexOf("/") + 1); |
| 324 | } |
| 325 | buf.append(String.valueOf(shortLogName)).append(" - "); |
| 326 | } else if (showLogName) { |
| 327 | buf.append(String.valueOf(logName)).append(" - "); |
| 328 | } |
| 329 | |
| 330 | // Append the message |
| 331 | buf.append(String.valueOf(message)); |
| 332 | |
| 333 | // Append stack trace if not null |
| 334 | if (t != null) { |
| 335 | buf.append(" <"); |
| 336 | buf.append(t.toString()); |
| 337 | buf.append(">"); |
| 338 | |
| 339 | java.io.StringWriter sw = new java.io.StringWriter(1024); |
| 340 | java.io.PrintWriter pw = new java.io.PrintWriter(sw); |
| 341 | t.printStackTrace(pw); |
| 342 | pw.close(); |
| 343 | buf.append(sw.toString()); |
| 344 | } |
| 345 | |
| 346 | // Print to the appropriate destination |
| 347 | write(buf); |
| 348 | |
| 349 | } |
| 350 | |
| 351 | /** |
| 352 | * <p> |
| 353 | * Write the content of the message accumulated in the specified |
| 354 | * <code>StringBuffer</code> to the appropriate output destination. The |
| 355 | * default implementation writes to <code>System.err</code>. |
| 356 | * </p> |
| 357 | * |
| 358 | * @param buffer |
| 359 | * A <code>StringBuffer</code> containing the accumulated text to be |
| 360 | * logged |
| 361 | */ |
| 362 | protected void write(StringBuffer buffer) { |
| 363 | |
| 364 | System.err.println(buffer.toString()); |
| 365 | |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * Is the given log level currently enabled? |
| 370 | * |
| 371 | * @param logLevel |
| 372 | * is this level enabled? |
| 373 | */ |
| 374 | protected boolean isLevelEnabled(int logLevel) { |
| 375 | // log level are numerically ordered so can use simple numeric |
| 376 | // comparison |
| 377 | return (logLevel >= currentLogLevel); |
| 378 | } |
| 379 | |
| 380 | // -------------------------------------------------------- Log Implementation |
| 381 | |
| 382 | /** |
| 383 | * <p> |
| 384 | * Log a message with debug log level. |
| 385 | * </p> |
| 386 | */ |
| 387 | public final void debug(Object message) { |
| 388 | |
| 389 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_DEBUG)) { |
| 390 | log(SimpleLog.LOG_LEVEL_DEBUG, message, null); |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | /** |
| 395 | * <p> |
| 396 | * Log an error with debug log level. |
| 397 | * </p> |
| 398 | */ |
| 399 | public final void debug(Object message, Throwable t) { |
| 400 | |
| 401 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_DEBUG)) { |
| 402 | log(SimpleLog.LOG_LEVEL_DEBUG, message, t); |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | /** |
| 407 | * <p> |
| 408 | * Log a message with trace log level. |
| 409 | * </p> |
| 410 | */ |
| 411 | public final void trace(Object message) { |
| 412 | |
| 413 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_TRACE)) { |
| 414 | log(SimpleLog.LOG_LEVEL_TRACE, message, null); |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | /** |
| 419 | * <p> |
| 420 | * Log an error with trace log level. |
| 421 | * </p> |
| 422 | */ |
| 423 | public final void trace(Object message, Throwable t) { |
| 424 | |
| 425 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_TRACE)) { |
| 426 | log(SimpleLog.LOG_LEVEL_TRACE, message, t); |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | /** |
| 431 | * <p> |
| 432 | * Log a message with info log level. |
| 433 | * </p> |
| 434 | */ |
| 435 | public final void info(Object message) { |
| 436 | |
| 437 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_INFO)) { |
| 438 | log(SimpleLog.LOG_LEVEL_INFO, message, null); |
| 439 | } |
| 440 | } |
| 441 | |
| 442 | /** |
| 443 | * <p> |
| 444 | * Log an error with info log level. |
| 445 | * </p> |
| 446 | */ |
| 447 | public final void info(Object message, Throwable t) { |
| 448 | |
| 449 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_INFO)) { |
| 450 | log(SimpleLog.LOG_LEVEL_INFO, message, t); |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * <p> |
| 456 | * Log a message with warn log level. |
| 457 | * </p> |
| 458 | */ |
| 459 | public final void warn(Object message) { |
| 460 | |
| 461 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_WARN)) { |
| 462 | log(SimpleLog.LOG_LEVEL_WARN, message, null); |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | /** |
| 467 | * <p> |
| 468 | * Log an error with warn log level. |
| 469 | * </p> |
| 470 | */ |
| 471 | public final void warn(Object message, Throwable t) { |
| 472 | |
| 473 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_WARN)) { |
| 474 | log(SimpleLog.LOG_LEVEL_WARN, message, t); |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | /** |
| 479 | * <p> |
| 480 | * Log a message with error log level. |
| 481 | * </p> |
| 482 | */ |
| 483 | public final void error(Object message) { |
| 484 | |
| 485 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_ERROR)) { |
| 486 | log(SimpleLog.LOG_LEVEL_ERROR, message, null); |
| 487 | } |
| 488 | } |
| 489 | |
| 490 | /** |
| 491 | * <p> |
| 492 | * Log an error with error log level. |
| 493 | * </p> |
| 494 | */ |
| 495 | public final void error(Object message, Throwable t) { |
| 496 | |
| 497 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_ERROR)) { |
| 498 | log(SimpleLog.LOG_LEVEL_ERROR, message, t); |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | /** |
| 503 | * <p> |
| 504 | * Log a message with fatal log level. |
| 505 | * </p> |
| 506 | */ |
| 507 | public final void fatal(Object message) { |
| 508 | |
| 509 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_FATAL)) { |
| 510 | log(SimpleLog.LOG_LEVEL_FATAL, message, null); |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | /** |
| 515 | * <p> |
| 516 | * Log an error with fatal log level. |
| 517 | * </p> |
| 518 | */ |
| 519 | public final void fatal(Object message, Throwable t) { |
| 520 | |
| 521 | if (isLevelEnabled(SimpleLog.LOG_LEVEL_FATAL)) { |
| 522 | log(SimpleLog.LOG_LEVEL_FATAL, message, t); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | /** |
| 527 | * <p> |
| 528 | * Are debug messages currently enabled? |
| 529 | * </p> |
| 530 | * |
| 531 | * <p> |
| 532 | * This allows expensive operations such as <code>String</code> concatenation |
| 533 | * to be avoided when the message will be ignored by the logger. |
| 534 | * </p> |
| 535 | */ |
| 536 | public final boolean isDebugEnabled() { |
| 537 | |
| 538 | return isLevelEnabled(SimpleLog.LOG_LEVEL_DEBUG); |
| 539 | } |
| 540 | |
| 541 | /** |
| 542 | * <p> |
| 543 | * Are error messages currently enabled? |
| 544 | * </p> |
| 545 | * |
| 546 | * <p> |
| 547 | * This allows expensive operations such as <code>String</code> concatenation |
| 548 | * to be avoided when the message will be ignored by the logger. |
| 549 | * </p> |
| 550 | */ |
| 551 | public final boolean isErrorEnabled() { |
| 552 | |
| 553 | return isLevelEnabled(SimpleLog.LOG_LEVEL_ERROR); |
| 554 | } |
| 555 | |
| 556 | /** |
| 557 | * <p> |
| 558 | * Are fatal messages currently enabled? |
| 559 | * </p> |
| 560 | * |
| 561 | * <p> |
| 562 | * This allows expensive operations such as <code>String</code> concatenation |
| 563 | * to be avoided when the message will be ignored by the logger. |
| 564 | * </p> |
| 565 | */ |
| 566 | public final boolean isFatalEnabled() { |
| 567 | |
| 568 | return isLevelEnabled(SimpleLog.LOG_LEVEL_FATAL); |
| 569 | } |
| 570 | |
| 571 | /** |
| 572 | * <p> |
| 573 | * Are info messages currently enabled? |
| 574 | * </p> |
| 575 | * |
| 576 | * <p> |
| 577 | * This allows expensive operations such as <code>String</code> concatenation |
| 578 | * to be avoided when the message will be ignored by the logger. |
| 579 | * </p> |
| 580 | */ |
| 581 | public final boolean isInfoEnabled() { |
| 582 | |
| 583 | return isLevelEnabled(SimpleLog.LOG_LEVEL_INFO); |
| 584 | } |
| 585 | |
| 586 | /** |
| 587 | * <p> |
| 588 | * Are trace messages currently enabled? |
| 589 | * </p> |
| 590 | * |
| 591 | * <p> |
| 592 | * This allows expensive operations such as <code>String</code> concatenation |
| 593 | * to be avoided when the message will be ignored by the logger. |
| 594 | * </p> |
| 595 | */ |
| 596 | public final boolean isTraceEnabled() { |
| 597 | |
| 598 | return isLevelEnabled(SimpleLog.LOG_LEVEL_TRACE); |
| 599 | } |
| 600 | |
| 601 | /** |
| 602 | * <p> |
| 603 | * Are warn messages currently enabled? |
| 604 | * </p> |
| 605 | * |
| 606 | * <p> |
| 607 | * This allows expensive operations such as <code>String</code> concatenation |
| 608 | * to be avoided when the message will be ignored by the logger. |
| 609 | * </p> |
| 610 | */ |
| 611 | public final boolean isWarnEnabled() { |
| 612 | |
| 613 | return isLevelEnabled(SimpleLog.LOG_LEVEL_WARN); |
| 614 | } |
| 615 | |
| 616 | /** |
| 617 | * Return the thread context class loader if available. Otherwise return null. |
| 618 | * |
| 619 | * The thread context class loader is available for JDK 1.2 or later, if |
| 620 | * certain security conditions are met. |
| 621 | * |
| 622 | * @exception LogConfigurationException |
| 623 | * if a suitable class loader cannot be identified. |
| 624 | */ |
| 625 | private static ClassLoader getContextClassLoader() { |
| 626 | ClassLoader classLoader = null; |
| 627 | |
| 628 | if (classLoader == null) { |
| 629 | try { |
| 630 | // Are we running on a JDK 1.2 or later system? |
Ceki Gulcu | e14afa6 | 2014-12-14 22:12:23 +0100 | [diff] [blame^] | 631 | Method method = Thread.class.getMethod("getContextClassLoader"); |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 632 | |
| 633 | // Get the thread context class loader (if there is one) |
| 634 | try { |
Ceki Gulcu | e14afa6 | 2014-12-14 22:12:23 +0100 | [diff] [blame^] | 635 | classLoader = (ClassLoader) method.invoke(Thread.currentThread()); |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 636 | } catch (IllegalAccessException e) { |
| 637 | ; // ignore |
| 638 | } catch (InvocationTargetException e) { |
| 639 | /** |
| 640 | * InvocationTargetException is thrown by 'invoke' when the method |
| 641 | * being invoked (getContextClassLoader) throws an exception. |
| 642 | * |
| 643 | * getContextClassLoader() throws SecurityException when the context |
| 644 | * class loader isn't an ancestor of the calling class's class loader, |
| 645 | * or if security permissions are restricted. |
| 646 | * |
| 647 | * In the first case (not related), we want to ignore and keep going. |
| 648 | * We cannot help but also ignore the second with the logic below, but |
| 649 | * other calls elsewhere (to obtain a class loader) will trigger this |
| 650 | * exception where we can make a distinction. |
| 651 | */ |
| 652 | if (e.getTargetException() instanceof SecurityException) { |
| 653 | ; // ignore |
| 654 | } else { |
| 655 | // Capture 'e.getTargetException()' exception for details |
| 656 | // alternate: log 'e.getTargetException()', and pass back 'e'. |
| 657 | throw new LogConfigurationException( |
| 658 | "Unexpected InvocationTargetException", e.getTargetException()); |
| 659 | } |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 660 | } |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 661 | } catch (NoSuchMethodException e) { |
| 662 | // Assume we are running on JDK 1.1 |
| 663 | ; // ignore |
| 664 | } |
| 665 | } |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 666 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 667 | if (classLoader == null) { |
| 668 | classLoader = SimpleLog.class.getClassLoader(); |
| 669 | } |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 670 | |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 671 | // Return the selected class loader |
| 672 | return classLoader; |
| 673 | } |
| 674 | |
| 675 | private static InputStream getResourceAsStream(final String name) { |
Otávio Garcia | ff61dda | 2014-02-23 15:23:00 -0300 | [diff] [blame] | 676 | return AccessController.doPrivileged(new PrivilegedAction<InputStream>() { |
| 677 | public InputStream run() { |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 678 | ClassLoader threadCL = getContextClassLoader(); |
| 679 | |
| 680 | if (threadCL != null) { |
| 681 | return threadCL.getResourceAsStream(name); |
| 682 | } else { |
| 683 | return ClassLoader.getSystemResourceAsStream(name); |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 684 | } |
Ceki Gulcu | 9a7a3a3 | 2009-09-01 18:45:26 +0200 | [diff] [blame] | 685 | } |
| 686 | }); |
| 687 | } |
Ceki Gulcu | a03af84 | 2007-04-16 19:48:14 +0000 | [diff] [blame] | 688 | } |