The London Perl and Raku Workshop takes place on 26th Oct 2024. If your company depends on Perl, please consider sponsoring and/or attending.
 / 
POE-Exceptions-0.0501
/ POE::Exceptions

NAME

POE::Exceptions - POE class for handling exceptions

SYNOPSIS

    use POE::Exceptions;

    POE::Session::Exception->create(
        inline_states => {
            _start => sub { print 'START';
                            $_[KERNEL]->sig('DIE','death_handled');
                          },
            death_handled => sub { print 'EXCEPTION CAUGHT' 
                                   $_[KERNEL]->sig_handled();
                                 },
            _stop => { print 'END' }
        }
    );

    $poe_kernel->run();

DEPRECATION

This module is deprecated as its functionality has been rolled into the POE core, as of POE 0.33. This module will receive no updates and will be removed from CPAN at some point in the near future.

DISCUSSION

POE::Exceptions extends POE to catch exceptions neatly. A new signal, DIE, is introduced. This signal will be fired every time an exception occurs. (For those of you new to the term exception, an exception is whenever the code decides to bail out by die'ing.) If the signal handler returns 1 (as in the example above), POE will assume that the handler dealt with the signal appropriately. If the signal handler returns 0, POE will assume that the handler does not want to deal with the signal and POE will propgate the exception as if the handler never existed.

Caveat: POE::Exceptions will die on its own in the case of a double exception fault. If the DIE signal handler itself throws an exception, POE::Exceptions will shut the program down and bail out.

DATE

$Date: 2006-03-26 17:13:33 -0500 (Sun, 26 Mar 2006) $

REVISION

$Revision: 8 $

AUTHOR

Matt Cashner (sungo@pobox.com)

See http://perlwhore.com for the latest on all of sungo's modules.

LICENSE

Copyright (c) 2002-2005, Matt Cashner. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  • Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

  • Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

  • Neither the name of the Matt Cashner nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.