Aspect::Pointcut::True(3pm) User Contributed Perl Documentation Aspect::Pointcut::True(3pm)NAME
Aspect::Pointcut::True - Pointcut that allows arbitrary Perl code
SYNOPSIS
use Aspect;
# High-level creation
my $pointcut1 = true { rand() > 0.5 };
# Manual creation
my $pointcut2 = Aspect::Pointcut::True->new(
sub { rand() > 0.5 }
);
DESCRIPTION
Because Aspect's weaving phase technically occurs at run-time (relative to the overall process) it does not need to be limit itself only to
conditions that are fully describable at compile-time.
Aspect::Pointcut::True allows you to take advantage of this to create your own custom run-time pointcut conditions, although for safety and
purity reasons you are not permitted to create custom conditions that interact with the Aspect::Point object for the call.
AUTHORS
Adam Kennedy <adamk@cpan.org>
Marcel Gruenauer <marcel@cpan.org>
Ran Eilam <eilara@cpan.org>
COPYRIGHT
Copyright 2001 by Marcel Gruenauer
Some parts copyright 2009 - 2012 Adam Kennedy.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.14.2 2012-02-01 Aspect::Pointcut::True(3pm)
Check Out this Related Man Page
Aspect::Modular(3pm) User Contributed Perl Documentation Aspect::Modular(3pm)NAME
Aspect::Modular - First generation base class for reusable aspects
SYNOPSIS
# Subclassing to create a reusable aspect
package Aspect::Library::ConstructorTracer;
use strict;
use base 'Aspect::Modular';
use Aspect::Advice::After ();
sub get_advice {
my $self = shift;
my $pointcut = shift;
return Aspect::Advice::After->new(
lexical => $self->lexical,
pointcut => $pointcut,
code => sub {
print 'Created object: ' . shift->return_value . "
";
},
);
}
# Using the new aspect
package main;
use Aspect;
# Print message when constructing new Person
aspect ConstructorTracer => call 'Person::new';
DESCRIPTION
All reusable aspect inherit from this class.
Such aspects are created in user code, using the "aspect()" sub exported by Aspect. You call "aspect()" with the class name of the reusable
aspect (it must exist in the package "Aspect::Library"), and any parameters (pointcuts, class names, code to run, etc.) the specific aspect
may require.
The Wormhole aspect, for example, expects 2 pointcut specs for the wormhole source and target, while the Profiler aspect expects a pointcut
object, to select the subs to be profiled.
You create a reusable aspect by subclassing this class, and providing one template method: "get_advice()". It is called with all the
parameters that were sent when user code created the aspect, and is expected to return Aspect::Advice object/s, that will be installed
while the reusable aspect is still in scope. If the "aspect()" sub is called in void context, the reusable aspect is installed until class
reloading or interpreter shutdown.
Typical things a reusable aspect may want to do:
o Install advice on pointcuts specified by the caller
o Push (vs. OOP pull) subs and base classes into classes specified by the caller
AUTHORS
Adam Kennedy <adamk@cpan.org>
Marcel Gruenauer <marcel@cpan.org>
Ran Eilam <eilara@cpan.org>
COPYRIGHT
Copyright 2001 by Marcel Gruenauer
Some parts copyright 2009 - 2012 Adam Kennedy.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.14.2 2012-02-01 Aspect::Modular(3pm)