Logging (ELKI: Environment for DeveLoping KDD-Applications Supported by Index-Structures)

java.lang.Object
- de.lmu.ifi.dbs.elki.logging.Logging

```
public class Logging
extends java.lang.Object
```
This class is a wrapper around Logger and LogManager offering additional convenience functions. If a class keeps a static reference to the appropriate Logging object, performance penalty compared to standard logging should be minimal. However when using LogRecord directly instead of ELKILogRecord, the use of the log(LogRecord) method will result in incorrectly logged cause location. Therefore, use ELKILogRecord!

Since:

0.2

Author:

Erich Schubert

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class Logging.Level
Logging Level class.

Nested Classes
Modifier and Type	Class and Description
`static class`	`Logging.Level` Logging Level class.

Field Summary

Fields
Modifier and Type	Field and Description
`private java.util.logging.Logger`	`logger` Wrapped logger of this instance - not static!
`private static java.util.HashMap<java.lang.String,Logging>`	`loggers` HashMap to keep track of loggers.

Constructor Summary

Constructors
Constructor and Description

Logging(java.util.logging.Logger logger)
Constructor, wrapping a logger.

Constructors
Constructor and Description
`Logging(java.util.logging.Logger logger)` Constructor, wrapping a logger.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`beginStep(StepProgress prog, int step, java.lang.String title)` Begin a new algorithm step (unless `null`).
`void`	`debug(java.lang.CharSequence message)` Log a message at the 'fine' debugging level.
`void`	`debug(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'fine' debugging level.
`void`	`debugFine(java.lang.CharSequence message)` Log a message at the 'fine' debugging level.
`void`	`debugFine(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'fine' debugging level.
`void`	`debugFiner(java.lang.CharSequence message)` Log a message at the 'finer' debugging level.
`void`	`debugFiner(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'finer' debugging level.
`void`	`debugFinest(java.lang.CharSequence message)` Log a message at the 'finest' debugging level.
`void`	`debugFinest(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'finest' debugging level.
`void`	`ensureCompleted(FiniteProgress prog)` Increment a progress (unless `null`).
`void`	`error(java.lang.CharSequence message)` Log a message at the 'severe' level.
`void`	`error(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'severe' level.
`void`	`exception(java.lang.CharSequence message, java.lang.Throwable e)` Log a message with exception at the 'severe' level.
`void`	`exception(java.lang.Throwable e)` Log an exception at the 'severe' level.
`void`	`fine(java.lang.CharSequence message)` Log a message at the 'fine' debugging level.
`void`	`fine(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'fine' debugging level.
`void`	`finer(java.lang.CharSequence message)` Log a message at the 'finer' debugging level.
`void`	`finer(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'finer' debugging level.
`void`	`finest(java.lang.CharSequence message)` Log a message at the 'finest' debugging level.
`void`	`finest(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'finest' debugging level.
`static Logging`	`getLogger(java.lang.Class<?> c)` Retrieve logging utility for a particular class.
`static Logging`	`getLogger(java.lang.String name)` Retrieve logging utility for a particular class.
`void`	`incrementProcessed(AbstractProgress prog)` Increment a progress (unless `null`).
`void`	`info(java.lang.CharSequence message)` Log a message at the 'info' ('verbose') level.
`void`	`info(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'info' ('verbose') level.
`boolean`	`isDebugging()` Test whether to log 'debug' at 'FINE' level.
`boolean`	`isDebuggingFine()` Test whether to log 'debug' at 'FINE' level This is the same as `isDebugging()`
`boolean`	`isDebuggingFiner()` Test whether to log 'debug' at 'FINER' level
`boolean`	`isDebuggingFinest()` Test whether to log 'debug' at 'FINEST' level
`boolean`	`isInfo()` Test whether to log 'info' aka 'verbose'.
`boolean`	`isLoggable(Logging.Level lev)` Verify if logging is enabled at that particular level.
`boolean`	`isStatistics()` Test whether to log 'statistics'.
`boolean`	`isVerbose()` Test whether to log 'verbose' aka 'info'.
`boolean`	`isVeryVerbose()` Test whether to log 'veryverbose'.
`void`	`log(java.util.logging.Level level, java.lang.CharSequence message)` Log a log message at the given level.
`void`	`log(java.util.logging.Level level, java.lang.CharSequence message, java.lang.Throwable e)` Log a log message and exception at the given level.
`void`	`log(java.util.logging.LogRecord rec)` Log a given log record (should be a `ELKILogRecord`)
`Counter`	`newCounter(java.lang.String key)` Generate a new counter.
`Duration`	`newDuration(java.lang.String key)` Generate a new duration statistic.
`void`	`progress(Progress pgr)` Log a Progress object.
`void`	`setCompleted(IndefiniteProgress prog)` Finish a progress (unless `null`).
`void`	`setCompleted(StepProgress prog)` Finish a progress (unless `null`).
`void`	`statistics(java.lang.CharSequence message)` Log a message at the 'STATISTICS' level.
`void`	`statistics(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'STATISTICS' level.
`void`	`statistics(Statistic stats)` Log a statistics object.
`java.lang.String`	`toString()`
`void`	`verbose(java.lang.CharSequence message)` Log a message at the 'info' ('verbose') level.
`void`	`verbose(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'info' ('verbose') level.
`void`	`veryverbose(java.lang.CharSequence message)` Log a message at the 'veryverbose' level.
`void`	`veryverbose(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'veryverbose' level.
`void`	`warning(java.lang.CharSequence message)` Log a message at the 'warning' level.
`void`	`warning(java.lang.CharSequence message, java.lang.Throwable e)` Log a message at the 'warning' level.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - loggers
```
private static java.util.HashMap<java.lang.String,Logging> loggers
```
    HashMap to keep track of loggers.
  - logger
```
private final java.util.logging.Logger logger
```
    Wrapped logger of this instance - not static!
- Constructor Detail
  - Logging
```
public Logging(java.util.logging.Logger logger)
```
    Constructor, wrapping a logger.
    
    Parameters:
    
    logger - Logger to wrap.
- Method Detail
  - getLogger
```
public static Logging getLogger(java.lang.Class<?> c)
```
    Retrieve logging utility for a particular class.
    
    Parameters:
    
    c - Class to retrieve logging for
    
    Returns:
    
    Logger
  - getLogger
```
public static Logging getLogger(java.lang.String name)
```
    Retrieve logging utility for a particular class.
    
    Parameters:
    
    name - Class name
    
    Returns:
    
    Logger
  - isLoggable
```
public boolean isLoggable(Logging.Level lev)
```
    Verify if logging is enabled at that particular level.
    
    Parameters:
    
    lev - Logging level
    
    Returns:
    
    status
  - isStatistics
```
public boolean isStatistics()
```
    Test whether to log 'statistics'.
    
    Returns:
    
    true if logging statistics
  - isVerbose
```
public boolean isVerbose()
```
    Test whether to log 'verbose' aka 'info'.
    
    Returns:
    
    true if verbose
  - isInfo
```
public boolean isInfo()
```
    Test whether to log 'info' aka 'verbose'.
    
    Returns:
    
    true if verbose
  - isVeryVerbose
```
public boolean isVeryVerbose()
```
    Test whether to log 'veryverbose'.
    
    Returns:
    
    true if extra verbose
  - isDebugging
```
public boolean isDebugging()
```
    Test whether to log 'debug' at 'FINE' level. This is the same as isDebuggingFine()
    
    Returns:
    
    true if debug logging enabled
  - isDebuggingFine
```
public boolean isDebuggingFine()
```
    Test whether to log 'debug' at 'FINE' level This is the same as isDebugging()
    
    Returns:
    
    true if debug logging enabled
  - isDebuggingFiner
```
public boolean isDebuggingFiner()
```
    Test whether to log 'debug' at 'FINER' level
    
    Returns:
    
    true if debug logging enabled
  - isDebuggingFinest
```
public boolean isDebuggingFinest()
```
    Test whether to log 'debug' at 'FINEST' level
    
    Returns:
    
    true if debug logging enabled
  - log
```
public void log(java.util.logging.Level level,
                java.lang.CharSequence message)
```
    Log a log message at the given level.
    
    Parameters:
    
    level - Level to log at.
    
    message - Message to log.
  - log
```
public void log(java.util.logging.Level level,
                java.lang.CharSequence message,
                java.lang.Throwable e)
```
    Log a log message and exception at the given level.
    
    Parameters:
    
    level - Level to log at.
    
    message - Message to log.
    
    e - Exception
  - log
```
public void log(java.util.logging.LogRecord rec)
```
    Log a given log record (should be a ELKILogRecord)
    
    Parameters:
    
    rec - Log record to log.
  - error
```
public void error(java.lang.CharSequence message,
                  java.lang.Throwable e)
```
    Log a message at the 'severe' level.
    
    Parameters:
    
    message - Warning log message.
    
    e - Exception
  - error
```
public void error(java.lang.CharSequence message)
```
    Log a message at the 'severe' level.
    
    Parameters:
    
    message - Warning log message.
  - warning
```
public void warning(java.lang.CharSequence message,
                    java.lang.Throwable e)
```
    Log a message at the 'warning' level.
    
    Parameters:
    
    message - Warning log message.
    
    e - Exception
  - warning
```
public void warning(java.lang.CharSequence message)
```
    Log a message at the 'warning' level.
    
    Parameters:
    
    message - Warning log message.
  - statistics
```
public void statistics(java.lang.CharSequence message,
                       java.lang.Throwable e)
```
    Log a message at the 'STATISTICS' level. You should check isTime() before building the message.
    
    Parameters:
    
    message - Informational log message.
    
    e - Exception
  - statistics
```
public void statistics(java.lang.CharSequence message)
```
    Log a message at the 'STATISTICS' level. You should check isTime() before building the message.
    
    Parameters:
    
    message - Informational log message.
  - verbose
```
public void verbose(java.lang.CharSequence message,
                    java.lang.Throwable e)
```
    Log a message at the 'info' ('verbose') level. You should check isVerbose() before building the message.
    
    Parameters:
    
    message - Informational log message.
    
    e - Exception
  - verbose
```
public void verbose(java.lang.CharSequence message)
```
    Log a message at the 'info' ('verbose') level. You should check isVerbose() before building the message.
    
    Parameters:
    
    message - Informational log message.
  - info
```
public void info(java.lang.CharSequence message,
                 java.lang.Throwable e)
```
    Log a message at the 'info' ('verbose') level. You should check isVerbose() before building the message.
    
    Parameters:
    
    message - Informational log message.
    
    e - Exception
  - info
```
public void info(java.lang.CharSequence message)
```
    Log a message at the 'info' ('verbose') level. You should check isVerbose() before building the message.
    
    Parameters:
    
    message - Informational log message.
  - veryverbose
```
public void veryverbose(java.lang.CharSequence message,
                        java.lang.Throwable e)
```
    Log a message at the 'veryverbose' level. You should check isVeryVerbose() before building the message.
    
    Parameters:
    
    message - Informational log message.
    
    e - Exception
  - veryverbose
```
public void veryverbose(java.lang.CharSequence message)
```
    Log a message at the 'veryverbose' level. You should check isVeryVerbose() before building the message.
    
    Parameters:
    
    message - Informational log message.
  - debug
```
public void debug(java.lang.CharSequence message,
                  java.lang.Throwable e)
```
    Log a message at the 'fine' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
    
    e - Exception
  - debug
```
public void debug(java.lang.CharSequence message)
```
    Log a message at the 'fine' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
  - debugFine
```
public void debugFine(java.lang.CharSequence message,
                      java.lang.Throwable e)
```
    Log a message at the 'fine' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
    
    e - Exception
  - debugFine
```
public void debugFine(java.lang.CharSequence message)
```
    Log a message at the 'fine' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
  - fine
```
public void fine(java.lang.CharSequence message,
                 java.lang.Throwable e)
```
    Log a message at the 'fine' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
    
    e - Exception
  - fine
```
public void fine(java.lang.CharSequence message)
```
    Log a message at the 'fine' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
  - debugFiner
```
public void debugFiner(java.lang.CharSequence message,
                       java.lang.Throwable e)
```
    Log a message at the 'finer' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
    
    e - Exception
  - debugFiner
```
public void debugFiner(java.lang.CharSequence message)
```
    Log a message at the 'finer' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
  - finer
```
public void finer(java.lang.CharSequence message,
                  java.lang.Throwable e)
```
    Log a message at the 'finer' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
    
    e - Exception
  - finer
```
public void finer(java.lang.CharSequence message)
```
    Log a message at the 'finer' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
  - debugFinest
```
public void debugFinest(java.lang.CharSequence message,
                        java.lang.Throwable e)
```
    Log a message at the 'finest' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
    
    e - Exception
  - debugFinest
```
public void debugFinest(java.lang.CharSequence message)
```
    Log a message at the 'finest' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
  - finest
```
public void finest(java.lang.CharSequence message,
                   java.lang.Throwable e)
```
    Log a message at the 'finest' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
    
    e - Exception
  - finest
```
public void finest(java.lang.CharSequence message)
```
    Log a message at the 'finest' debugging level. You should check isDebugging() before building the message.
    
    Parameters:
    
    message - Informational log message.
  - exception
```
public void exception(java.lang.CharSequence message,
                      java.lang.Throwable e)
```
    Log a message with exception at the 'severe' level.
    
    Parameters:
    
    message - Error log message.
    
    e - Exception
  - exception
```
public void exception(java.lang.Throwable e)
```
    Log an exception at the 'severe' level.
    
    Parameters:
    
    e - Exception
  - progress
```
public void progress(Progress pgr)
```
    Log a Progress object.
    
    Parameters:
    
    pgr - Progress to log.
  - newCounter
```
public Counter newCounter(java.lang.String key)
```
    Generate a new counter.
    
    Parameters:
    
    key - Key to use
    
    Returns:
    
    Counter.
  - newDuration
```
public Duration newDuration(java.lang.String key)
```
    Generate a new duration statistic.
    
    Parameters:
    
    key - Key to use
    
    Returns:
    
    Duration statistic.
  - incrementProcessed
```
public void incrementProcessed(AbstractProgress prog)
```
    Increment a progress (unless null).
    
    Parameters:
    
    prog - Progress to increment, may be null.
  - ensureCompleted
```
public void ensureCompleted(FiniteProgress prog)
```
    Increment a progress (unless null).
    
    Parameters:
    
    prog - Progress to complete, may be null.
  - beginStep
```
public void beginStep(StepProgress prog,
                      int step,
                      java.lang.String title)
```
    Begin a new algorithm step (unless null). Important: Do not use this method when the parameter are not static. In these cases, check whether logging is enabled first, to avoid computing method parameters!
    
    Parameters:
    
    prog - Progress to increment, may be null.
    
    step - Step number
    
    title - Step title
  - setCompleted
```
public void setCompleted(StepProgress prog)
```
    Finish a progress (unless null).
    
    Parameters:
    
    prog - Progress to complete, may be null.
  - setCompleted
```
public void setCompleted(IndefiniteProgress prog)
```
    Finish a progress (unless null).
    
    Parameters:
    
    prog - Progress to complete, may be null.
  - statistics
```
public void statistics(Statistic stats)
```
    Log a statistics object.
    
    Parameters:
    
    stats - Statistics object to report.
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object

Class Logging

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

loggers

logger

Constructor Detail

Logging

Method Detail

getLogger

getLogger

isLoggable

isStatistics

isVerbose

isInfo

isVeryVerbose

isDebugging

isDebuggingFine

isDebuggingFiner

isDebuggingFinest

log

log

log

error

error

warning

warning

statistics

statistics

verbose

verbose

info

info

veryverbose

veryverbose

debug

debug

debugFine

debugFine

fine

fine

debugFiner

debugFiner

finer

finer

debugFinest

debugFinest

finest

finest

exception

exception

progress

newCounter

newDuration

incrementProcessed

ensureCompleted

beginStep

setCompleted

setCompleted

statistics

toString