Christopher M. Fuhrman
and 1 contributors


Log::Fine::Formatter - Log message formatting and sanitization


Provides a formatting facility for log messages

    use Log::Fine::Handle;
    use Log::Fine::Formatter;

    my $handle    = Log::Fine::Handle::Console->new();
    my $formatter = Log::Fine::Formatter::Detailed->new(
      timestamp_format => "%Y-%m-%d %H:%M:%S"

    # By default, the handle will set its formatter to
    # Log::Fine::Formatter::Basic.  If that's not what you want, set
    # it to preference.

    # Set the time-stamp to "YYYY-MM-DD HH:MM:SS"
    $formatter->timeStamp("%Y-%m-%d %H:%M:%S");

    # High resolution timestamps with milliseconds are
    # supported thus:
    my $hires_formatter =
        hires => 1,
        timestamp_format => "%H:%M:%S.%%millis%%",

    # Set the precision of the high resolution formatter
    my $fmtr = Log::Fine::Formatter::Basic->new(
                 hires => 1,
                 timestamp_format => "%H:%M:%S.%%millis%%",
                 precision => 6


Base ancestral class for all formatters. All customized formatters must inherit from this class. The formatter class allows developers to adjust the time-stamp in a log message to a customizable strftime-compatible string without the tedious mucking about writing a formatter sub-class. By default, the time-stamp format is "%c". See "timeStamp" and the strftime(3) man page on your system for further details.

High Resolution Timestamps

High Resolution time stamps are generated using the Time::HiRes module. Depending on your distribution of perl, this may or may not be installed. Add the string "%%millis%%" (without the quotes) where you would like milliseconds displayed within your format. For example:


Note you must enable high resolution mode during Formatter construction as so:

    my $formatter = Log::Fine::Formatter::Basic->new( hires => 1 );

By default, the time-stamp format for high resolution mode is "%H:%M:%S.%%millis%%". This can be changed via the "timeStamp" method or set during formatter construction. "%%millis%%" is a case insensitive value, thus "%%MILLIS%%" will work as well as "%%Millis%%".

Millisecond Precision

Millisecond precision can be set on construction as so:

    my $formatter =
      Log::Fine::Formatter::Basic->new( hires     => 1,
                                        precision => 6 );

If not set, the default value of 5 will be used. Note that the precision hash element will be ignored unless hires is set.

Using Log format templates

As of version 0.37, Log::Fine now supports log format templates. See Log::Fine::Formatter::Template for details.



Returns the formatted message. Must be sub-classed!


The formatted string


Special method used for unit tests only. Not for use in production environments!


  • level

    Level at which to log

  • message

    Message to log


The formatted string


Getter/Setter for a strftime(3)-compatible format string. If passed with an argument, sets the objects strftime compatible string. Otherwise, returns the objects format string.


  • string

    [optional] strftime(3) compatible string to set


strftime(3) compatible string


Please report any bugs or feature requests to bug-log-fine at, or through the web interface at I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.


You can find documentation for this module with the perldoc command.

    perldoc Log::Fine

You can also look for information at:


Christopher M. Fuhrman, <cfuhrman at>


perl, strftime, Log::Fine, Time::HiRes


Copyright (c) 2008-2010, 2013 Christopher M. Fuhrman, All rights reserved.

This program is free software licensed under the...

        The BSD License

The full text of the license can be found in the LICENSE file included with this module.