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Michael Schilli > Log-Log4perl > Log::Log4perl::Appender::TestBuffer



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Log::Log4perl::Appender::TestBuffer - Appender class for testing


  use Log::Log4perl::Appender::TestBuffer;

  my $appender = Log::Log4perl::Appender::TestBuffer->new( 
      name      => 'mybuffer',

      # Append to the buffer
      level =  > 'alert', 
      message => "I'm searching the city for sci-fi wasabi\n" 

      # Retrieve the result
  my $result = $appender->buffer();

      # Clear the buffer to the empty string


This class is used for internal testing of Log::Log4perl. It is a Log::Dispatch-style appender, which writes to a buffer in memory, from where actual results can be easily retrieved later to compare with expected results.

Every buffer created is stored in an internal global array, and can later be referenced by name:

    my $app = Log::Log4perl::Appender::TestBuffer->by_name("mybuffer");

retrieves the appender object of a previously created buffer "mybuffer". To reset this global array and have it forget all of the previously created testbuffer appenders (external references to those appenders nonwithstanding), use




Copyright 2002-2013 by Mike Schilli <> and Kevin Goess <>.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.


Please contribute patches to the project on Github:

Send bug reports or requests for enhancements to the authors via our

MAILING LIST (questions, bug reports, suggestions/patches):

Authors (please contact them via the list above, not directly): Mike Schilli <>, Kevin Goess <>

Contributors (in alphabetical order): Ateeq Altaf, Cory Bennett, Jens Berthold, Jeremy Bopp, Hutton Davidson, Chris R. Donnelly, Matisse Enzer, Hugh Esco, Anthony Foiani, James FitzGibbon, Carl Franks, Dennis Gregorovic, Andy Grundman, Paul Harrington, Alexander Hartmaier David Hull, Robert Jacobson, Jason Kohles, Jeff Macdonald, Markus Peter, Brett Rann, Peter Rabbitson, Erik Selberg, Aaron Straup Cope, Lars Thegler, David Viner, Mac Yang.

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