NAME

MasonX::LeakGuard::Object - report memory leaks (objects) per request

SYNOPSIS

use MasonX::LeakGuard::Object;
%MasonX::LeakGuard::Object::OPTIONS = (
    exclude => [
        'utf8',
        'HTML::Mason::*',
        'Devel::StackTrace',
    ],
    hide_arguments => [
        'pass', 'password',
    ],
);
my @MasonParameters = (
    ...
    plugins => [qw(MasonX::LeakGuard::Object)],
);

DESCRIPTION

This is plugin for HTML::Mason based applications that helps you find memory leaks in OO code. It uses Devel::LeakGuard::Object framework for that.

OPTIONS

It's possible to use all options leakguard function in Devel::LeakGuard::Object supports. Look at "SYNOPSIS" for example.

Some additional options are supported.

on_leak

on_leak option can be used to customize report or redirect to custom log, for example:

%MasonX::LeakGuard::Object::OPTIONS = (
    on_leak => sub {
        my ($report, %args) = @_;
        MyApp->logger->error( $args{'message'} );
    },
);

First argument is the report structure (read more on it in Devel::LeakGuard::Object). To make life easier more data is passed into your function as a hash. The hash contains:

formatted - formatted report, a text table.

message - formatted default message containg description, request path, request arguments and report. For example:

Leak(s) found after request to '/index.html' with $ARGS1 = [
           'argument',
           'value',
         ];
Leaked objects:
  Class          Before  After  Delta
  MyApp::Class        0      1      1

path - request path.

arguments - request arguments, array reference.

hide_arguments

It's possible to specify list of arguments names to hide from reports, for example:

%MasonX::LeakGuard::Object::OPTIONS = (
    hide_arguments => [
        'pass', 'password',
    ],
);

FALSE POSITIVES

It's possible that false positives are reported, for example if a compontent has ONCE block where you cache some values on first request. Most caches will generate false positive reports, but it's possible to use options of function leakguard in Devel::LeakGuard::Object. Look at "SYNOPSIS" for example and "OPTIONS" for additional details.

To avoid many false positives the module as well ignores first request to a path.

Sure it doesn't protect you from all cases.

AUTHOR

Ruslan Zakirov <ruz@bestpractical.com>

LICENSE

Under the same terms as perl itself.

-cut