---
name: "Catalyst::Component::ContextClosure"
section: "3pm"
platform: "linux"
package: "libcatalyst-perl"
version: "5.90132-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Catalyst::Component::ContextClosure"
---

# Catalyst::Component::ContextClosure(3pm)

Moose Role for components which need to close over the $ctx, without leaking

## NAME

Catalyst::Component::ContextClosure - Moose Role for components which need to close over the $ctx, without leaking

## SYNOPSIS

```
    package MyApp::Controller::Foo;
    use Moose;
    use namespace::clean -except => 'meta';
    BEGIN {
        extends 'Catalyst::Controller';
        with 'Catalyst::Component::ContextClosure';
    }
    sub some_action : Local {
        my ($self, $ctx) = @_;
        $ctx->stash(a_closure => $self->make_context_closure(sub {
            my ($ctx) = @_;
            $ctx->response->body('body set from closure');
        }, $ctx));
    }
```

## DESCRIPTION

A common problem with stashing a closure, that closes over the Catalyst context (often called `$ctx` or `$c`), is the circular reference it creates, as the closure holds onto a reference to context, and the context holds a reference to the closure in its stash. This creates a memory leak, unless you always carefully weaken the closures context reference.

This role provides a convenience method to create closures, that closes over `$ctx`.

## METHODS

### make\_context\_closure ($closure, $ctx)

Returns a code reference, that will invoke `$closure` with a weakened reference to `$ctx`. All other parameters to the returned code reference will be passed along to `$closure`.

## SEE ALSO

Catalyst::Component

Catalyst::Controller

CatalystX::LeakChecker

## COPYRIGHT

This library is free software. You can redistribute it and/or modify it under the same terms as Perl itself.