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Java Source Code / Java Documentation » Development » SLF4J » org.apache.commons.logging.impl 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.apache.commons.logging.impl.SimpleLog

SimpleLog
public class SimpleLog implements Log,Serializable(Code)

Simple implementation of Log that sends all enabled log messages, for all defined loggers, to System.err. The following system properties are supported to configure the behavior of this logger:

  • org.apache.commons.logging.simplelog.defaultlog - Default logging detail level for all instances of SimpleLog. Must be one of ("trace", "debug", "info", "warn", "error", or "fatal"). If not specified, defaults to "info".
  • org.apache.commons.logging.simplelog.log.xxxxx - Logging detail level for a SimpleLog instance named "xxxxx". Must be one of ("trace", "debug", "info", "warn", "error", or "fatal"). If not specified, the default logging detail level is used.
  • org.apache.commons.logging.simplelog.showlogname - Set to true if you want the Log instance name to be included in output messages. Defaults to false.
  • org.apache.commons.logging.simplelog.showShortLogname - Set to true if you want the last component of the name to be included in output messages. Defaults to true.
  • org.apache.commons.logging.simplelog.showdatetime - Set to true if you want the current date and time to be included in output messages. Default is false.
  • org.apache.commons.logging.simplelog.dateTimeFormat - The date and time format to be used in the output messages. The pattern describing the date and time format is the same that is used in java.text.SimpleDateFormat. If the format is not specified or is invalid, the default format is used. The default format is yyyy/MM/dd HH:mm:ss:SSS zzz.

In addition to looking for system properties with the names specified above, this implementation also checks for a class loader resource named "simplelog.properties", and includes any matching definitions from this resource (if it exists).


author:
   Scott Sanders
author:
   Rod Waldhoff
author:
   Robert Burrell Donkin
version:
   $Id: SimpleLog.java,v 1.21 2004/06/06 20:47:56 rdonkin Exp $


Field Summary
final protected static  StringDEFAULT_DATE_TIME_FORMAT
    
final public static  intLOG_LEVEL_ALL
    
final public static  intLOG_LEVEL_DEBUG
     "Debug" level logging.
final public static  intLOG_LEVEL_ERROR
     "Error" level logging.
final public static  intLOG_LEVEL_FATAL
     "Fatal" level logging.
final public static  intLOG_LEVEL_INFO
     "Info" level logging.
final public static  intLOG_LEVEL_OFF
    
final public static  intLOG_LEVEL_TRACE
     "Trace" level logging.
final public static  intLOG_LEVEL_WARN
     "Warn" level logging.
protected  intcurrentLogLevel
    
protected static  DateFormatdateFormatter
    
protected static  StringdateTimeFormat
    
protected  StringlogName
    
protected static  booleanshowDateTime
    
protected static  booleanshowLogName
    
protected static  booleanshowShortName
     Include the short name ( last component ) of the logger in the log message.
final protected static  PropertiessimpleLogProps
    
final protected static  StringsystemPrefix
    

Constructor Summary
public  SimpleLog(String name)
     Construct a simple log with given name.

Method Summary
final public  voiddebug(Object message)
    
final public  voiddebug(Object message, Throwable t)
    
final public  voiderror(Object message)
    
final public  voiderror(Object message, Throwable t)
    
final public  voidfatal(Object message)
    
final public  voidfatal(Object message, Throwable t)
    
public  intgetLevel()
    

Get logging level.

final public  voidinfo(Object message)
    
final public  voidinfo(Object message, Throwable t)
    
final public  booleanisDebugEnabled()
    

Are debug messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

final public  booleanisErrorEnabled()
    

Are error messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

final public  booleanisFatalEnabled()
    

Are fatal messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

final public  booleanisInfoEnabled()
    

Are info messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

protected  booleanisLevelEnabled(int logLevel)
    
final public  booleanisTraceEnabled()
    

Are trace messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

final public  booleanisWarnEnabled()
    

Are warn messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

protected  voidlog(int type, Object message, Throwable t)
    

Do the actual logging.

public  voidsetLevel(int currentLogLevel)
    

Set logging level.

final public  voidtrace(Object message)
    
final public  voidtrace(Object message, Throwable t)
    
final public  voidwarn(Object message)
    
final public  voidwarn(Object message, Throwable t)
    
protected  voidwrite(StringBuffer buffer)
    

Write the content of the message accumulated in the specified StringBuffer to the appropriate output destination.


Field Detail
DEFAULT_DATE_TIME_FORMAT
final protected static String DEFAULT_DATE_TIME_FORMAT(Code)
The default format to use when formating dates



LOG_LEVEL_ALL
final public static int LOG_LEVEL_ALL(Code)
Enable all logging levels



LOG_LEVEL_DEBUG
final public static int LOG_LEVEL_DEBUG(Code)
"Debug" level logging.



LOG_LEVEL_ERROR
final public static int LOG_LEVEL_ERROR(Code)
"Error" level logging.



LOG_LEVEL_FATAL
final public static int LOG_LEVEL_FATAL(Code)
"Fatal" level logging.



LOG_LEVEL_INFO
final public static int LOG_LEVEL_INFO(Code)
"Info" level logging.



LOG_LEVEL_OFF
final public static int LOG_LEVEL_OFF(Code)
Enable no logging levels



LOG_LEVEL_TRACE
final public static int LOG_LEVEL_TRACE(Code)
"Trace" level logging.



LOG_LEVEL_WARN
final public static int LOG_LEVEL_WARN(Code)
"Warn" level logging.



currentLogLevel
protected int currentLogLevel(Code)
The current log level



dateFormatter
protected static DateFormat dateFormatter(Code)
Used to format times



dateTimeFormat
protected static String dateTimeFormat(Code)
The date and time format to use in the log message



logName
protected String logName(Code)
The name of this simple log instance



showDateTime
protected static boolean showDateTime(Code)
Include the current time in the log message



showLogName
protected static boolean showLogName(Code)
Include the instance name in the log message?



showShortName
protected static boolean showShortName(Code)
Include the short name ( last component ) of the logger in the log message. Defaults to true - otherwise we'll be lost in a flood of messages without knowing who sends them.



simpleLogProps
final protected static Properties simpleLogProps(Code)
Properties loaded from simplelog.properties



systemPrefix
final protected static String systemPrefix(Code)
All system properties used by SimpleLog start with this




Constructor Detail
SimpleLog
public SimpleLog(String name)(Code)
Construct a simple log with given name.
Parameters:
  name - log name




Method Detail
debug
final public void debug(Object message)(Code)

Log a message with debug log level.




debug
final public void debug(Object message, Throwable t)(Code)

Log an error with debug log level.




error
final public void error(Object message)(Code)

Log a message with error log level.




error
final public void error(Object message, Throwable t)(Code)

Log an error with error log level.




fatal
final public void fatal(Object message)(Code)

Log a message with fatal log level.




fatal
final public void fatal(Object message, Throwable t)(Code)

Log an error with fatal log level.




getLevel
public int getLevel()(Code)

Get logging level.




info
final public void info(Object message)(Code)

Log a message with info log level.




info
final public void info(Object message, Throwable t)(Code)

Log an error with info log level.




isDebugEnabled
final public boolean isDebugEnabled()(Code)

Are debug messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.




isErrorEnabled
final public boolean isErrorEnabled()(Code)

Are error messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.




isFatalEnabled
final public boolean isFatalEnabled()(Code)

Are fatal messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.




isInfoEnabled
final public boolean isInfoEnabled()(Code)

Are info messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.




isLevelEnabled
protected boolean isLevelEnabled(int logLevel)(Code)
Is the given log level currently enabled?
Parameters:
  logLevel - is this level enabled?



isTraceEnabled
final public boolean isTraceEnabled()(Code)

Are trace messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.




isWarnEnabled
final public boolean isWarnEnabled()(Code)

Are warn messages currently enabled?

This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.




log
protected void log(int type, Object message, Throwable t)(Code)

Do the actual logging. This method assembles the message and then calls write() to cause it to be written.


Parameters:
  type - One of the LOG_LEVEL_XXX constants defining the log level
Parameters:
  message - The message itself (typically a String)
Parameters:
  t - The exception whose stack trace should be logged



setLevel
public void setLevel(int currentLogLevel)(Code)

Set logging level.


Parameters:
  currentLogLevel - new logging level



trace
final public void trace(Object message)(Code)

Log a message with trace log level.




trace
final public void trace(Object message, Throwable t)(Code)

Log an error with trace log level.




warn
final public void warn(Object message)(Code)

Log a message with warn log level.




warn
final public void warn(Object message, Throwable t)(Code)

Log an error with warn log level.




write
protected void write(StringBuffer buffer)(Code)

Write the content of the message accumulated in the specified StringBuffer to the appropriate output destination. The default implementation writes to System.err.


Parameters:
  buffer - A StringBuffer containing the accumulatedtext to be logged



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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