1NullLogLite(3)        User Contributed Perl Documentation       NullLogLite(3)
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NAME

6       Log::NullLogLite - The "Log::NullLogLite" class implements the Null
7       Object pattern for the "Log::LogLite" class.
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SYNOPSIS

10         use Log::NullLogLite;
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12         # create new Log::NullLogLite object
13         my $log = new Log::NullLogLite();
14
15         ...
16
17         # we had an error (this entry will not be written to the log
18         # file because we use Log::NullLogLite object).
19         $log->write("Could not open the file ".$file_name.": $!", 4);
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DESCRIPTION

22       The "Log::NullLogLite" class is derived from the "Log::LogLite" class
23       and implement the Null Object Pattern to let us to use the
24       "Log::LogLite" class with null "Log::LogLite" objects.  We might want
25       to do that if we use a "Log::LogLite" object in our code, and we do not
26       want always to actually define a "Log::LogLite" object (i.e. not always
27       we want to write to a log file). In such a case we will create a
28       "Log::NullLogLite" object instead of the "Log::LogLite" object, and
29       will use that object instead.  The object has all the methods that the
30       "Log::LogLite" object has, but those methods do nothing. Thus our code
31       will continue to run without any change, yet we will not have to define
32       a log file path for the "Log::LogLite" object, and no log will be
33       created.
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CONSTRUCTOR

36       new ( FILEPATH [,LEVEL [,DEFAULT_MESSAGE ]] )
37           The constructor. The parameters will not have any affect.  Returns
38           the new Log::NullLogLite object.
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METHODS

41       write( MESSAGE [, LEVEL ] )
42           Does nothing. The parameters will not have any affect.  Returns
43           nothing.
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45       level( [ LEVEL ] )
46           Does nothing. The parameters will not have any affect.  Returns -1.
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48       default_message( [ MESSAGE ] )
49           Does nothing. The parameters will not have any affect.  Returns
50           empty string ("").
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AUTHOR

53       Rani Pinchuk, rani@cpan.org
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56       Copyright (c) 2001-2002 Ockham Technology N.V. & Rani Pinchuk.  All
57       rights reserved.  This package is free software; you can redistribute
58       it and/or modify it under the same terms as Perl itself.
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SEE ALSO

61       Log::LogLite(3), The Null Object Pattern - Bobby Woolf - PLoP96 -
62       published in Pattern Languages of Program Design 3
63       (http://cseng.aw.com/book/0,,0201310112,00.html)
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POD ERRORS

66       Hey! The above document had some coding errors, which are explained
67       below:
68
69       Around line 128:
70           You forgot a '=back' before '=head1'
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74perl v5.32.0                      2020-07-28                    NullLogLite(3)
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