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#-*- perl -*-
#
# Copyright (C) 2001 Ken'ichi Fukamachi
# All rights reserved. This program is free software; you can
# redistribute it and/or modify it under the same terms as Perl itself.
#
# $FML: Command.pm,v 1.11 2001/10/14 00:56:54 fukachan Exp $
#
package FML::Command;
use strict;
use vars qw(@ISA @EXPORT @EXPORT_OK $AUTOLOAD);
use Carp;
use FML::Log qw(Log LogWarn LogError);
use FML::Command::Attribute;
@ISA = qw(FML::Command::Attribute);
=head1 NAME
FML::Command - dispacher of fml commands
=head1 SYNOPSIS
=head1 DESCRIPTION
C<FML::Command> is a wrapper and dispathcer for fml commands.
AUTOLOAD() picks up the command request and dispatches
C<FML::Command::User::somoting> for the request.
Also, C<FML::Command::Admin::somoting> for the admin command request.
=head1 METHODS
=head2 C<new()>
ordinary constructor.
=head2 C<AUTOLOAD()>
dispatcher.
It hooks up the C<command> request and loads the module
C<FML::Command::command>.
=cut
sub new
{
my ($self) = @_;
my ($type) = ref($self) || $self;
my $me = {};
return bless $me, $type;
}
sub DESTROY { ;}
sub AUTOLOAD
{
my ($self, $curproc, $command_args) = @_;
my $mode = $command_args->{ 'command_mode' } =~ /admin/i ? 'Admin' : 'User';
return if $AUTOLOAD =~ /DESTROY/;
my $comname = $AUTOLOAD;
$comname =~ s/.*:://;
my $pkg = "FML::Command::${mode}::${comname}";
Log("load $pkg") if $0 =~ /loader/; # debug
eval qq{ require $pkg; $pkg->import();};
unless ($@) {
my $command = $pkg->new();
if ($command->can('auth')) {
$command->auth($curproc, $command_args);
}
if ($command->can('process')) {
$curproc->lock() if $self->require_lock($mode, $comname);
$command->process($curproc, $command_args);
$curproc->unlock() if $self->require_lock($mode, $comname);
if ($command->error()) { Log($command->error());}
}
else {
LogError("${pkg} has no process method");
}
}
else {
LogError("$pkg module is not found");
LogError($@);
}
}
=head2 C<require_lock($comname)>
specifield C<command> requires lock (giant lock) ?
return 1 by default (almost all command requires lock).
=cut
sub require_lock
{
my ($self, $mode, $comname) = @_;
my $r = $self->get_attribute($mode, $comname, 'require_lock');
if ($0 =~ /loader/) {
Log("get_attribute($mode, $comname, 'require_lock') = $r");
}
return $r;
}
=head1 AUTHOR
Ken'ichi Fukamachi
=head1 COPYRIGHT
Copyright (C) 2001 Ken'ichi Fukamachi
All rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as Perl itself.
=head1 HISTORY
FML::Command appeared in fml5 mailing list driver package.
See C<http://www.fml.org/> for more details.
=cut
1;
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