NullLogLite(3) User Contributed Perl Documentation NullLogLite(3)NAMELog::NullLogLite - The "Log::NullLogLite" class implements the Null
Object pattern for the "Log::LogLite" class.
SYNOPSIS
use Log::NullLogLite;
# create new Log::NullLogLite object
my $log = new Log::NullLogLite();
...
# we had an error (this entry will not be written to the log
# file because we use Log::NullLogLite object).
$log->write("Could not open the file ".$file_name.": $!", 4);
DESCRIPTION
The "Log::NullLogLite" class is derived from the "Log::LogLite" class
and implement the Null Object Pattern to let us to use the
"Log::LogLite" class with null "Log::LogLite" objects. We might want
to do that if we use a "Log::LogLite" object in our code, and we do not
want always to actually define a "Log::LogLite" object (i.e. not always
we want to write to a log file). In such a case we will create a
"Log::NullLogLite" object instead of the "Log::LogLite" object, and
will use that object instead. The object has all the methods that the
"Log::LogLite" object has, but those methods do nothing. Thus our code
will continue to run without any change, yet we will not have to define
a log file path for the "Log::LogLite" object, and no log will be
created.
CONSTRUCTOR
new ( FILEPATH [,LEVEL [,DEFAULT_MESSAGE ]] )
The constructor. The parameters will not have any affect. Returns
the new Log::NullLogLite object.
METHODS
write( MESSAGE [, LEVEL ] )
Does nothing. The parameters will not have any affect. Returns
nothing.
level( [ LEVEL ] )
Does nothing. The parameters will not have any affect. Returns -1.
default_message( [ MESSAGE ] )
Does nothing. The parameters will not have any affect. Returns
empty string ("").
AUTHOR
Rani Pinchuk, rani@cpan.org
COPYRIGHT
Copyright (c) 2001-2002 Ockham Technology N.V. & Rani Pinchuk. All
rights reserved. This package is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.
SEE ALSOLog::LogLite(3), The Null Object Pattern - Bobby Woolf - PLoP96 -
published in Pattern Languages of Program Design 3
(http://cseng.aw.com/book/0,,0201310112,00.html)
POD ERRORS
Hey! The above document had some coding errors, which are explained
below:
Around line 128:
You forgot a '=back' before '=head1'
perl v5.14.1 2002-09-24 NullLogLite(3)
