Lazy Listeners
In This Article
Lazy Listeners
Lazy listeners are a new feature in version 3.0, provided to reduce the performance overhead of fetching listeners and/or aggregates from a Dependency Injection Container until they are actually triggered.
The feature consists of three classes:
Zend\EventManager\LazyListener
, which provides basic capabilities for wrapping the retrieval of a listener from a container and invoking it.Zend\EventManager\LazyEventListener
, which extendsLazyListener
but adds awareness of the event and optionally priority to use when attaching the listener. These are primarily used and created by:Zend\EventManager\LazyListenerAggregate
, which can take a list ofLazyEventListeners
and/or their definitions, and be used as an aggregate listener for attaching the lazy listeners to an event manager.
Preparation
In order to use the lazy listeners feature, you will need to install container-interop, if you haven't already:
$ composer require container-interop/container-interop
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