Devel::Events::Generator::Objects - Generate events for blessing and destruction of objects.
bless
use Devel::Events::Generator::Objects; # must be loaded before any code you want to instrument my $g = Devel::Events::Generator::Objects->new( handler => $h, ); $g->enable(); # only one Objects generator may be enabled at a time $code->(); # objects being created and destroyed cause events to be generated $g->disable();
This module overrides CORE::GLOBAL::bless on load. The altered version will delegate back to the original version until an instance of a generator is enabled.
CORE::GLOBAL::bless
When a generator is enabled (only one Devel::Events::Generator::Objects instance may be enabled at a time. Use Devel::Events::Handler::Multiplex to dup events to multiple listeners), the overridden version of bless will cause an object_bless event to fire, and will also attach magic to the object to keep track of it's destruction using Variable::Magic.
object_bless
When the object is freed by the interpreter an object_destroy event is fired. Unfortunately by this time perl has already unblessed the object in question, so in order to keep track of the class you must associate it yourself with the reference address.
object_destroy
perl
Devel::Events::Handler::ObjectTracker contains a detailed usage example.
When the generator is enabled, this event will fire on every call to bless for all code loaded after this module was loaded.
In the future this event might omit objects created during event handling, but currently it does not.
The object that was blessed
If this is a rebless then this parameter contains the class the object was in just before the bless.
These fields correspond to the location o the call to bless.
For every object created while the generator was enabled, magic to track destruction will be attached. When the object is freed this magic callback will fire this event.
This field contains a reference to the object.
NOTE: by the time this callback fires the object is no longer blessed. Be sure to keep track of the class of every refaddr as reported by object_bless in your handler if you need to know the class the object belonged to at destroy time..
Make this instance the enabled one (disabling any other instance which is enabled).
This only applies to the object_bless method.
Disable this instance. Will stop generating object_bless events.
The method called by the CORE::GLOBAL::bless hook.
Uses CORE::bless to bless the data, and then calls object_bless.
CORE::bless
Generates the object_bless event.
Calls rack_object.
rack_object
Generates the object_destroy event.
Calls untrack_object.
untrack_object
A class method containing the Variable::Magic specification necessary for track_object to work.
Attach magic to an object that will call object_destroy when the data is about to be freed.
Currently empty. A subclass with a different implementation of track_object might want to override this.
track_object
Devel::Object::Leak, Variable::Magic
To install Devel::Events::Objects, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Devel::Events::Objects
CPAN shell
perl -MCPAN -e shell install Devel::Events::Objects
For more information on module installation, please visit the detailed CPAN module installation guide.