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OO::Plugin – framework for working with OO plugins.
use OO::Plugin;
use OO::Plugin::Manager;
class Foo is pluggable {
has $.attr;
method bar is pluggable {
return 42;
}
}
plugin Fubar {
method a-bar ( $msg ) is plug-around( Foo => 'bar' ) {
$msg.set-rc( pi ); # Will override &Foo::bar return value and prevent its execution.
}
}
my $manager = OO::Plugin::Manager.new.initialize;
my $instance = $manager.create( Foo, attr => 'some value' );
say $instance.bar; # 3.141592653589793
With this framework any application can have highly flexible and extensible plugin subsystem with which plugins would be capable of:
method overriding
class overriding (inheriting)
callbacks
asynchronous event handling
The framework also supports:
automatic loading of plugins with a predefined namespace
managing plugin ordering and dependencies
Not yet supported but planned for the future is plugin compatibility management.
Read more in OO::Plugin::Manual
.
plugin-meta [key =
value, ...]>
Registers plugin meta. Can only be used within plugin body block.
plug-last [return-value]
Cancels current execution chain and optionally sets return value.
plug-redo
Restarts current execution chain.
PluginMessage
and OO::Plugin::Class
.
OO::Plugin::Manual
, OO::Plugin::Manager
, OO::Plugin::Class
OO::Plugin::Registry
Vadim Belman [email protected]