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plugin wrapping:

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replace wrap_plugin implementation with
  isa_plugin inheritance based implementation


git-svn-id: https://svn.perl.org/qpsmtpd/trunk@312 958fd67b-6ff1-0310-b445-bb7760255be9
This commit is contained in:
Robert Spier 2004-09-08 05:14:10 +00:00
parent fb3f0b4604
commit 0b16ec9418
1 changed files with 16 additions and 27 deletions
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43
lib/Qpsmtpd/Plugin.pm
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@ -52,37 +52,26 @@ sub connection {
shift->qp->connection; shift->qp->connection;
} }
sub wrap_plugin { # plugin inheritance:
my ($self, $plugin_file, @args) = @_; # usage:
# sub register {
# my $self = shift;
# $self->isa_plugin("rhsbl");
# $self->SUPER::register(@_);
# }
sub isa_plugin {
my ($self, $parent) = @_;
my ($currentPackage) = caller;
my $newPackage = $currentPackage."::_isa_";
# Wrap all of the methods in an existing plugin so that functions return if defined &{"${newPackage}::register"};
# can easily be replaced. Yes, we could use something like
# Hook::Lexwrap isntead, but since it's only 15 lines of code, might
# as well do it ourself.
# Static methods in plugins will probably not work right in this Qpsmtpd::_compile($self->plugin_name . "_isa",
# scheme. $newPackage,
"plugins/$parent"); # assumes Cwd is qpsmtpd root
# Load the new plugin under our namespace.
my $newPackage = __PACKAGE__."::_wrap_";
Qpsmtpd::_compile($self->plugin_name, $newPackage, $plugin_file)
unless defined &{"${newPackage}::register"};
no strict 'refs'; no strict 'refs';
my $currentPackage = ref $self; push @{"${currentPackage}::ISA"}, $newPackage;
local *{${newPackage}."::register_hook"} = sub {
if (defined &{ $currentPackage . "::$_[2]"}) {
# We're wrapping this hook. Store the old value in $self-{_wrap_FUNC}
$self->{"_wrap_".$_[2]} = \&{${newPackage}."::$_[2]"};
} else {
# We're not wrapping this hook. Alias it into our namespace.
*{$currentPackage."::$_[2]"} = \&{${newPackage}."::$_[2]"};
}
$self->register_hook($_[1],$_[2]);
};
$self->{_wrapped_package} = $newPackage;
$newPackage->register($self->{_qp},@args);
} }
1; 1;