Glassfish example source code file (AbstractLogger.java)
The Glassfish AbstractLogger.java source code/*
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/*
* AbstractLogger.java
*
* Created on May 14, 2002, 12:35 PM
*/
package com.sun.jdo.spi.persistence.utility.logging;
import java.io.*;
import java.util.*;
import java.text.MessageFormat;
import org.glassfish.persistence.common.I18NHelper;
import com.sun.jdo.spi.persistence.utility.StringHelper;
/**
* This class provides a default implementation of the
* com.sun.jdo.spi.persistence.utility.logging.Logger interface which
* implements most methods and/or delegates them to a few
* abstract methods which subclasses must override.
*
* @author Rochelle Raccah
* @version %I%
*/
abstract public class AbstractLogger implements Logger
{
/** I18N message handler for this class */
private static final ResourceBundle _messages =
I18NHelper.loadBundle(AbstractLogger.class);
/** Default level if none supplied */
private static final int _defaultLevel = INFO;
/** Level Separator for Logger Level specification */
private static final char _levelSeparator='.';
private static Map _levelNamesToValues;
private static boolean _hasLoggingProperties = true;
private static Properties _loggingProperties;
/** Resource bundle for this (named) logger */
private final ResourceBundle _bundle;
/** Name for this logger */
private final String _loggerName;
/** Level for this logger */
private final int _level;
static
{
_levelNamesToValues = new HashMap();
_levelNamesToValues.put("ALL", new Integer(ALL)); // NOI18N
_levelNamesToValues.put("FINEST", new Integer(FINEST)); // NOI18N
_levelNamesToValues.put("FINER", new Integer(FINER)); // NOI18N
_levelNamesToValues.put("FINE", new Integer(FINE)); // NOI18N
_levelNamesToValues.put("CONFIG", new Integer(CONFIG)); // NOI18N
_levelNamesToValues.put("INFO", new Integer(INFO)); // NOI18N
_levelNamesToValues.put("WARNING", new Integer(WARNING)); // NOI18N
_levelNamesToValues.put("SEVERE", new Integer(SEVERE)); // NOI18N
_levelNamesToValues.put("OFF", new Integer(OFF)); // NOI18N
}
/** Creates a new AbstractLogger. The supplied class loader or the
* loader which loaded this class must be able to load the bundle.
* @param loggerName the full domain name of this logger
* @param bundleName the bundle name for message translation
* @param loader the loader used for looking up the bundle file
* and possibly the logging.properties or alternative file
*/
public AbstractLogger (String loggerName, String bundleName,
ClassLoader loader)
{
_loggerName = loggerName;
_level = readLoggingLevel(loggerName);
_bundle = I18NHelper.loadBundle(bundleName, loader);
}
/** Get the message bundle for the AbstractLogger itself.
*/
protected static ResourceBundle getMessages () { return _messages; }
private static Map getLevelNameMap () { return _levelNamesToValues; }
// mostly copied from LogManager's readConfiguration() in jdk1.4
private static synchronized Properties getLoggingProperties ()
{
if (_hasLoggingProperties && (_loggingProperties == null))
{
String fileName =
System.getProperty("java.util.logging.config.file"); // NOI18N
if (fileName == null)
{
fileName = System.getProperty("java.home"); // NOI18N
if (fileName != null)
{
File file = new File(fileName, "lib"); // NOI18N
file = new File(file, "logging.properties"); // NOI18N
try
{
fileName = file.getCanonicalPath();
}
catch (IOException ioe)
{
fileName = null;
}
}
}
if (fileName != null)
{
InputStream inputStream = null;
File file = null;
try
{
Properties properties = new Properties();
BufferedInputStream bufferedInputStream = null;
inputStream = new FileInputStream(fileName);
bufferedInputStream = new BufferedInputStream(inputStream);
properties.load(bufferedInputStream);
_loggingProperties = properties;
}
catch (Exception e)
{
_hasLoggingProperties = false;
}
finally
{
if (inputStream != null)
{
try
{
inputStream.close();
}
catch (IOException ioe)
{
// couldn't close it for some reason
}
}
}
}
else
_hasLoggingProperties = false;
}
return _loggingProperties;
}
/** Return the string name of a level given its int value.
* @return a string representing the level
*/
public static String toString (int level)
{
String bundleKey = null;
switch (level)
{
case Logger.OFF:
bundleKey = "utility.level_off"; // NOI18N
break;
case Logger.SEVERE:
bundleKey = "utility.level_severe"; // NOI18N
break;
case Logger.WARNING:
bundleKey = "utility.level_warning"; // NOI18N
break;
case Logger.INFO:
bundleKey = "utility.level_info"; // NOI18N
break;
case Logger.CONFIG:
bundleKey = "utility.level_config"; // NOI18N
break;
case Logger.FINE:
bundleKey = "utility.level_fine"; // NOI18N
break;
case Logger.FINER:
bundleKey = "utility.level_finer"; // NOI18N
break;
case Logger.FINEST:
bundleKey = "utility.level_finest"; // NOI18N
break;
case Logger.ALL:
bundleKey = "utility.level_all"; // NOI18N
break;
}
return ((bundleKey != null) ?
I18NHelper.getMessage(getMessages(), bundleKey) : null);
}
/** Get the message bundle for the named instance of the logger.
*/
protected ResourceBundle getBundle () { return _bundle; }
public int getLevel () { return _level; }
private int readLoggingLevel (String loggerName)
{
String value = findLevelMatch(loggerName);
int level = _defaultLevel;
if (value != null)
{
Object lookupValue = null;
value = value.trim();
lookupValue = getLevelNameMap().get(value);
if (lookupValue != null)
level = ((Integer)lookupValue).intValue();
else // maybe a number was specified
{
try
{
level = Integer.parseInt(value);
}
catch (NumberFormatException nfe)
{
// level will be the default
}
}
}
return level;
}
/** Find the best matched logging level from the logging properties
*@param loggerName the name of the hierarchical
*@return a String representing the level value
*/
private String findLevelMatch (String loggerName)
{
Properties properties = getLoggingProperties();
String value = null;
if (properties != null)
{
while (value == null)
{
int lastIndex = loggerName.lastIndexOf(_levelSeparator);
value = properties.getProperty(loggerName + ".level"); // NOI18N
if (loggerName.trim().length() > 0)
{
loggerName = ((lastIndex == -1) ? "" : // NOI18N
loggerName.substring(0, lastIndex));
}
else
return value;
}
}
return value;
}
/** Return whether logging is enabled at the FINE level. This method
* is not exact because to make it accurately reflect the logging level
* we would have to include the JDK 1.4 java.util.logging.Level class.
* This method does not delegate to isLoggable(FINE) for performance
* reasons.
* @return whether logging is enabled at the fine level.
*/
public boolean isLoggable () { return (FINE >= getLevel()); }
/**
* Check if a message of the given level would actually be logged
* by this logger. This check is based on the Logger's effective level,
* which may be inherited from its parent.
*
* @return true if the given message level is currently being logged.
* @param levelValue the level to check
*/
public boolean isLoggable (int levelValue)
{
return (levelValue >= getLevel());
}
/**
* Log a method entry.
* <p>
* This is a convenience method that can be used to log entry
* to a method. A LogRecord with message "ENTRY", log level
* FINER, and the given sourceMethod and sourceClass is logged.
* <p>
* @param sourceClass name of class that issued the logging request
* @param sourceMethod name of method that is being entered
*/
public void entering (String sourceClass, String sourceMethod)
{
entering(sourceClass, sourceMethod, (Object[])null);
}
/**
* Log a method entry, with one parameter.
* <p>
* This is a convenience method that can be used to log entry
* to a method. A LogRecord with message "ENTRY {0}", log level
* FINER, and the given sourceMethod, sourceClass, and parameter
* is logged.
* <p>
* @param sourceClass name of class that issued the logging request
* @param sourceMethod name of method that is being entered
* @param param1 parameter to the method being entered
*/
public void entering (String sourceClass, String sourceMethod,
Object param1)
{
if (isLoggable(FINER))
entering(sourceClass, sourceMethod, new Object[]{param1});
}
/**
* Log a method entry, with an array of parameters.
* <p>
* This is a convenience method that can be used to log entry
* to a method. A LogRecord with message "ENTRY" (followed by a
* format {N} indicator for each entry in the parameter array),
* log level FINER, and the given sourceMethod, sourceClass, and
* parameters is logged.
* <p>
* @param sourceClass name of class that issued the logging request
* @param sourceMethod name of method that is being entered
* @param params array of parameters to the method being entered
*/
public void entering (String sourceClass, String sourceMethod,
Object params[])
{
if (isLoggable(FINER))
{
MessageFormat messageFormat = null;
String messageKey = null;
String[] args = null;
if ((params != null) && (params.length > 0))
{
messageKey = "entering_method_params"; // NOI18N
args = new String[]{sourceClass, sourceMethod,
StringHelper.arrayToSeparatedList(Arrays.asList(params))};
}
else
{
messageKey = "entering_method"; // NOI18N
args = new String[]{sourceClass, sourceMethod};
}
messageFormat = new MessageFormat(
getMessages().getString(messageKey));
finer(messageFormat.format(args));
}
}
/**
* Log a method return.
* <p>
* This is a convenience method that can be used to log returning
* from a method. A LogRecord with message "RETURN", log level
* FINER, and the given sourceMethod and sourceClass is logged.
* <p>
* @param sourceClass name of class that issued the logging request
* @param sourceMethod name of the method
*/
public void exiting (String sourceClass, String sourceMethod)
{
exiting(sourceClass, sourceMethod, null);
}
/**
* Log a method return, with result object.
* <p>
* This is a convenience method that can be used to log returning
* from a method. A LogRecord with message "RETURN {0}", log level
* FINER, and the gives sourceMethod, sourceClass, and result
* object is logged.
* <p>
* @param sourceClass name of class that issued the logging request
* @param sourceMethod name of the method
* @param result Object that is being returned
*/
public void exiting (String sourceClass, String sourceMethod, Object result)
{
if (isLoggable(FINER))
{
MessageFormat messageFormat = null;
String messageKey = null;
Object[] args = null;
if (result != null)
{
messageKey = "exiting_method_return"; // NOI18N
args = new Object[]{sourceClass, sourceMethod, result};
}
else
{
messageKey = "exiting_method"; // NOI18N
args = new Object[]{sourceClass, sourceMethod};
}
messageFormat = new MessageFormat(
getMessages().getString(messageKey));
finer(messageFormat.format(args));
}
}
/**
* Log throwing an exception.
* <p>
* This is a convenience method to log that a method is
* terminating by throwing an exception. The logging is done
* using the FINER level.
* <p>
* If the logger is currently enabled for the given message
* level then the given arguments are stored in a LogRecord
* which is forwarded to all registered output handlers. The
* LogRecord's message is set to "THROW".
* <p>
* Note that the thrown argument is stored in the LogRecord thrown
* property, rather than the LogRecord parameters property. Thus is it
* processed specially by output Formatters and is not treated
* as a formatting parameter to the LogRecord message property.
* <p>
* @param sourceClass name of class that issued the logging request
* @param sourceMethod name of the method.
* @param thrown The Throwable that is being thrown.
*/
public void throwing (String sourceClass, String sourceMethod,
Throwable thrown)
{
if (isLoggable(FINER))
{
MessageFormat messageFormat = new MessageFormat(
getMessages().getString("throwing_method"));
log(FINER, messageFormat.format(
new String[]{sourceClass, sourceMethod}), thrown);
}
}
/**
* Log a SEVERE message.
* <p>
* If the logger is currently enabled for the SEVERE message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
*/
public void severe (String msg) { log(SEVERE, msg); }
/**
* Log a WARNING message.
* <p>
* If the logger is currently enabled for the WARNING message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
*/
public void warning (String msg) { log(WARNING, msg); }
/**
* Log an INFO message.
* <p>
* If the logger is currently enabled for the INFO message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
*/
public void info (String msg) { log(INFO, msg); }
/**
* Log a CONFIG message.
* <p>
* If the logger is currently enabled for the CONFIG message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
*/
public void config (String msg) { log(CONFIG, msg); }
/**
* Log a message.
* <p>
* If the logger is currently enabled for the message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param level The level for this message
* @param msg The string message (or a key in the message catalog)
*/
public void log (int level, String msg)
{
if (isLoggable(level))
logInternal(level, getMessage(msg));
}
/**
* Log a message.
* <p>
* If the logger is currently enabled for the message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param level The level for this message
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
*/
public void log (int level, String msg, Object o1)
{
if (isLoggable(level))
log(level, msg, new Object[]{o1});
}
/**
* Log a message.
* <p>
* If the logger is currently enabled for the message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param level The level for this message
* @param msg The string message (or a key in the message catalog)
* @param o Objects to be inserted into the message
*/
public void log (int level, String msg, Object[] o)
{
if (isLoggable(level))
{
int count = ((o == null) ? 0 : o.length);
String formattedMessage = msg;
if (count > 0)
{
MessageFormat messageFormat =
new MessageFormat(getBundle().getString(msg));
if (messageFormat != null)
formattedMessage = messageFormat.format(o);
}
else
formattedMessage = getMessage(msg);
logInternal(level, formattedMessage);
}
}
/**
* Log a message.
* <p>
* If the logger is currently enabled for the message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param level The level for this message
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
* @param o2 A parameter to be inserted into the message
*/
public void log (int level, String msg, Object o1, Object o2)
{
if (isLoggable(level))
log(level, msg, new Object[]{o1, o2});
}
/**
* Log a message.
* <p>
* If the logger is currently enabled for the message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param level The level for this message
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
* @param o2 A parameter to be inserted into the message
* @param o3 A parameter to be inserted into the message
*/
public void log (int level, String msg, Object o1, Object o2, Object o3)
{
if (isLoggable(level))
log(level, msg, new Object[]{o1, o2, o3});
}
/**
* Log a message.
* <p>
* If the logger is currently enabled for the message
* level then the given message, and the exception dump,
* is forwarded to all the
* registered output Handler objects.
* <p>
* @param level The level for this message
* @param msg The string message (or a key in the message catalog)
* @param thrown The exception to log
*/
abstract public void log (int level, String msg, Throwable thrown);
/**
* Log a message.
* <p>
* If the logger is currently enabled for the message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
*/
public void fine (String msg) { log(FINE, msg); }
/**
* Log a FINE message.
* <p>
* If the logger is currently enabled for the FINE message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
*/
public void fine (String msg, Object o1) { log(FINE, msg, o1); }
/**
* Log a FINE message.
* <p>
* If the logger is currently enabled for the FINE message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o Objects to be inserted into the message
*/
public void fine (String msg, Object[] o) { log(FINE, msg, o); }
/**
* Log a FINE message.
* <p>
* If the logger is currently enabled for the FINE message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
* @param o2 A parameter to be inserted into the message
*/
public void fine (String msg, Object o1, Object o2)
{
log(FINE, msg, o1, o2);
}
/**
* Log a FINE message.
* <p>
* If the logger is currently enabled for the FINE message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
* @param o2 A parameter to be inserted into the message
* @param o3 A parameter to be inserted into the message
*/
public void fine (String msg, Object o1, Object o2, Object o3)
{
log(FINE, msg, o1, o2, o3);
}
/**
* Log a FINER message.
* <p>
* If the logger is currently enabled for the FINER message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
*/
public void finer (String msg) { log(FINER, msg); }
/**
* Log a FINER message.
* <p>
* If the logger is currently enabled for the FINER message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o Objects to be inserted into the message
*/
public void finer (String msg, Object[] o) { log(FINER, msg, o); }
/**
* Log a FINER message.
* <p>
* If the logger is currently enabled for the FINER message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
*/
public void finer (String msg, Object o1) { log(FINER, msg, o1); }
/**
* Log a FINER message.
* <p>
* If the logger is currently enabled for the FINER message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
* @param o2 A parameter to be inserted into the message
*/
public void finer (String msg, Object o1, Object o2)
{
log(FINER, msg, o1, o2);
}
/**
* Log a FINER message.
* <p>
* If the logger is currently enabled for the FINER message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
* @param o2 A parameter to be inserted into the message
* @param o3 A parameter to be inserted into the message
*/
public void finer (String msg, Object o1, Object o2, Object o3)
{
log(FINER, msg, o1, o2, o3);
}
/**
* Log a FINEST message.
* <p>
* If the logger is currently enabled for the FINEST message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
*/
public void finest (String msg) { log(FINEST, msg); }
/**
* Log a FINEST message.
* <p>
* If the logger is currently enabled for the FINEST message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o Objects to be inserted into the message
*/
public void finest (String msg, Object[] o) { log(FINEST, msg, o); }
/**
* Log a FINEST message.
* <p>
* If the logger is currently enabled for the FINEST message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
*/
public void finest (String msg, Object o1) { log(FINEST, msg, o1); }
/**
* Log a FINEST message.
* <p>
* If the logger is currently enabled for the FINEST message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
* @param o2 A parameter to be inserted into the message
*/
public void finest (String msg, Object o1, Object o2)
{
log(FINEST, msg, o1, o2);
}
/**
* Log a FINEST message.
* <p>
* If the logger is currently enabled for the FINEST message
* level then the given message is forwarded to all the
* registered output Handler objects.
* <p>
* @param msg The string message (or a key in the message catalog)
* @param o1 A parameter to be inserted into the message
* @param o2 A parameter to be inserted into the message
* @param o3 A parameter to be inserted into the message
*/
public void finest (String msg, Object o1, Object o2, Object o3)
{
log(FINEST, msg, o1, o2, o3);
}
/**
* Get the name for this logger.
* @return logger name. Will be null for anonymous Loggers.
*/
public String getName () { return _loggerName; }
/** Prepare a printable version of this instance.
* @return the String representation of this object
*/
public String toString ()
{
StringBuffer buffer = new StringBuffer(getClass().getName());
buffer.append(": "); //NOI18N
buffer.append(" name: "); //NOI18N
buffer.append(getName());
buffer.append(", logging level: "); //NOI18N
buffer.append(toString(getLevel()));
return buffer.toString();
}
/**
* This method returns a string from the bundle file if possible,
* treating the message argument as the key. If no such key is found
* in the bundle, the message itself is returned.
*
* @return a message either used as itself or searched in the bundle file.
* @param message the message which is used as a key to search the bundle
*/
protected String getMessage (String message)
{
try
{
return getBundle().getString(message);
}
catch (MissingResourceException e)
{
return message;
}
}
/**
* This method returns a string with a formatted prefix which
* depends on the level.
*
* @return a formatted string with a level prefix.
* @param level the level to print
* @param message the message to print
* @see AbstractLogger#toString
*/
protected String getMessageWithPrefix (int level, String message)
{
MessageFormat messageFormat = new MessageFormat(
getMessages().getString("logging_prefix")); // NOI18N
return messageFormat.format(
new String[]{toString(level), message});
}
/**
* This method does the actual logging. It is expected that if a
* check for isLoggable is desired for performance reasons, it has
* already been done, as it should not be done here.
* @param level the level to print
* @param message the message to print
*/
abstract protected void logInternal (int level, String message);
}
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