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Vendor waffle-commons
Package event-dispatcher
Short Description Event Dispatcher component for Waffle framework.
License MIT

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Informations about the package event-dispatcher

Waffle Event Dispatcher Component

Release: 0.1.0-beta4 | CHANGELOG.md PSR Compliance: PSR-14 (Psr\EventDispatcher\EventDispatcherInterface, ListenerProviderInterface, StoppableEventInterface)

A minimal, attribute-driven PSR-14 dispatcher. The dispatcher itself is final readonly and stateless; the listener provider stores the listener map and supports priority ordering and #[AsEventListener] attribute discovery.

📦 Installation

🧱 Surface

Class	Role
`Waffle\Commons\EventDispatcher\Dispatcher\EventDispatcher`	`final readonly` PSR-14 dispatcher. Walks listeners, respects `StoppableEventInterface`.
`Waffle\Commons\EventDispatcher\Provider\ListenerProvider`	Listener registry. Manual registration via `addListener()`, or attribute scanning via `register($object)`.
`Waffle\Commons\EventDispatcher\Attribute\AsEventListener`	PHP 8 attribute marking a class or method as a listener.
`Waffle\Commons\EventDispatcher\Event\AbstractStoppableEvent`	Convenience base implementing `StoppableEventInterface`.

🚀 Manual registration

🏷️ Attribute-driven registration (`#[AsEventListener]`)

The attribute is declared as:

Method-level — event class resolved from the parameter type-hint

Class-level — first public non-constructor method is the handler

🛑 Stoppable events

The dispatcher honours isPropagationStopped() and breaks out of the listener loop.

🐘 PHP 8.5 features used

final readonly class EventDispatcher — the dispatcher itself is immutable.
Constructor property promotion with explicit visibility on listeners.
Typed properties + parameters throughout.
Inheritance walks via native get_parent_class() (not reflection caches), so listener resolution against parent event types is O(depth) without warm-up cost.

🧭 Architectural boundary (`mago guard`)

An active dependency perimeter is enforced on every CI run by vendor/bin/mago guard (bundled into composer mago; zero baselines). The rules live in mago.toml under [guard.perimeter] — a forbidden use statement fails the build, not a reviewer.

Production code under Waffle\Commons\EventDispatcher may depend only on:

Waffle\Commons\EventDispatcher\** — itself
Waffle\Commons\Contracts\** — the shared contracts package, the only Waffle dependency permitted
Psr\** — PSR interfaces (PSR-14)
@global + Psl\** — PHP core and the PHP Standard Library

Test code under WaffleTests\Commons\EventDispatcher is unrestricted (@all). Structural rules are guarded too: interfaces must be named *Interface, Exception\** classes must end in *Exception, and any Enum\** namespace may hold only enum declarations.

Contract-first, component-agnostic by construction: components compose through waffle-commons/contracts, never directly through one another.

🧪 Testing

📄 License

MIT — see LICENSE.md.

All versions of event-dispatcher with dependencies

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Package Version

Version 0.1.0-beta4 Release 14. Jun 2026
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Requires php Version ^8.5
psr/event-dispatcher Version ^1.0
waffle-commons/contracts Version self.version

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