EventManager/EventManager.php

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Zend Framework

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Category: Zend
Copyright: Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
License: New BSD License
Package: Zend_EventManager

\Zend_EventManager_EventManager
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Package: Zend_EventManager

Event manager: notification system

Use the EventManager when you want to create a per-instance notification system for your objects.

Implements
Category: Zend
Copyright: Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
License: New BSD License

Properties

string $eventClass = 'Zend_EventManager_Event'

Class representing the event being emitted

Default value'Zend_EventManager_Event'Details

Type: string

array $events = array()

Subscribed events and their listeners

Default valuearray()Details

Type: array

array $identifiers = array()

Identifiers, used to pull static signals from StaticEventManager

Default valuearray()Details

Type: array

false|null|\Zend_EventManager_StaticEventCollection $sharedCollections = null

Static collections

Default valuenullDetails

Type: false | null | \Zend_EventManager_StaticEventCollection

Methods

__construct(null | string | int | array | \Traversable $identifiers = null) : void

Constructor

Allows optionally specifying identifier(s) to use to pull signals from a StaticEventManager.

Parameters

Name	Type	Description
$identifiers	null \| string \| int \| array \| \Traversable

addIdentifiers(string | int | array | \Traversable $identifiers) : \Zend_EventManager_EventManager

Add some identifier(s) (appends to any currently set identifiers)

Parameters

Name	Type	Description
$identifiers	string \| int \| array \| \Traversable

Returns

Type	Description
\Zend_EventManager_EventManager

attach(string | array | \Zend_EventManager_ListenerAggregate $event, callback | int $callback = null, int $priority = 1) : \Zend_Stdlib_CallbackHandler | mixed

Attach a listener to an event

The first argument is the event, and the next argument describes a callback that will respond to that event. A CallbackHandler instance describing the event listener combination will be returned. The last argument indicates a priority at which the event should be executed. By default, this value is 1; however, you may set it for any integer value. Higher values have higher priority (i.e., execute first). You can specify "*" for the event name. In such cases, the listener will be triggered for every event.

Parameters

Name	Type	Description
$event	string \| array \| \Zend_EventManager_ListenerAggregate	An event or array of event names. If a ListenerAggregate, proxies to {@link attachAggregate()}.
$callback	callback \| int	If string $event provided, expects PHP callback; for a ListenerAggregate $event, this will be the priority
$priority	int	If provided, the priority at which to register the callback

Returns

Type	Description
\Zend_Stdlib_CallbackHandler \| mixed	CallbackHandler if attaching callback (to allow later unsubscribe); mixed if attaching aggregate

attachAggregate(\Zend_EventManager_ListenerAggregate $aggregate, int $priority = 1) : mixed

Attach a listener aggregate

Listener aggregates accept an EventCollection instance, and call attach() one or more times, typically to attach to multiple events using local methods.

Parameters

Name	Type	Description
$aggregate	\Zend_EventManager_ListenerAggregate
$priority	int	If provided, a suggested priority for the aggregate to use

Returns

Type	Description
mixed	return value of {@link Zend_EventManager_ListenerAggregate::attach()}

clearListeners(string $event) : void

Clear all listeners for a given event

Parameters

Name	Type	Description
$event	string

detach(\Zend_Stdlib_CallbackHandler | \Zend_EventManager_ListenerAggregate $listener) : bool

Unsubscribe a listener from an event

Parameters

Name	Type	Description
$listener	\Zend_Stdlib_CallbackHandler \| \Zend_EventManager_ListenerAggregate

Returns

Type	Description
bool	Returns true if event and listener found, and unsubscribed; returns false if either event or listener not found

Throws

Exception	Description
\Zend_EventManager_Exception_InvalidArgumentException	if invalid listener provided

detachAggregate(\Zend_EventManager_ListenerAggregate $aggregate) : mixed

Detach a listener aggregate

Listener aggregates accept an EventCollection instance, and call detach() of all previously attached listeners.

Parameters

Name	Type	Description
$aggregate	\Zend_EventManager_ListenerAggregate

Returns

Type	Description
mixed	return value of {@link Zend_EventManager_ListenerAggregate::detach()}

getEvents() : array

Retrieve all registered events

Returns

Type	Description
array

getIdentifiers() : array

Get the identifier(s) for this Zend_EventManager_EventManager

Returns

Type	Description
array

getListeners(string $event) : \Zend_Stdlib_PriorityQueue

Retrieve all listeners for a given event

Parameters

Name	Type	Description
$event	string

Returns

Type	Description
\Zend_Stdlib_PriorityQueue

getSharedCollections() : false | \Zend_EventManager_SharedEventCollection

Get static collections container

Returns

Type	Description
false \| \Zend_EventManager_SharedEventCollection

getSharedListeners(string $event) : array

Get list of all listeners attached to the shared collection for identifiers registered by this instance

Parameters

Name	Type	Description
$event	string

Returns

Type	Description
array

insertListeners(\Zend_Stdlib_PriorityQueue $masterListeners, \Zend_Stdlib_PriorityQueue $listeners) : void

Add listeners to the master queue of listeners

Used to inject shared listeners and wildcard listeners.

Parameters

Name	Type	Description
$masterListeners	\Zend_Stdlib_PriorityQueue
$listeners	\Zend_Stdlib_PriorityQueue

prepareArgs(array $args) : \ArrayObject

Prepare arguments

Use this method if you want to be able to modify arguments from within a listener. It returns an ArrayObject of the arguments, which may then be passed to trigger() or triggerUntil().

Parameters

Name	Type	Description
$args	array

Returns

Type	Description
\ArrayObject

setEventClass(string $class) : \Zend_EventManager_EventManager

Set the event class to utilize

Parameters

Name	Type	Description
$class	string

Returns

Type	Description
\Zend_EventManager_EventManager

setIdentifiers(string | int | array | \Traversable $identifiers) : \Zend_EventManager_EventManager

Set the identifiers (overrides any currently set identifiers)

Parameters

Name	Type	Description
$identifiers	string \| int \| array \| \Traversable

Returns

Type	Description
\Zend_EventManager_EventManager

setSharedCollections(\Zend_EventManager_StaticEventCollection $collections) : void

Set static collections container

Parameters

Name	Type	Description
$collections	\Zend_EventManager_StaticEventCollection

trigger(string $event, string | object $target = null, array | \ArrayAccess $argv = array(), null | callback $callback = null) : \Zend_EventManager_ResponseCollection

Trigger all listeners for a given event

Can emulate triggerUntil() if the last argument provided is a callback.

Parameters

Name	Type	Description
$event	string
$target	string \| object	Object calling emit, or symbol describing target (such as static method name)
$argv	array \| \ArrayAccess	Array of arguments; typically, should be associative
$callback	null \| callback

Returns

Type	Description
\Zend_EventManager_ResponseCollection	All listener return values

triggerListeners(string $event, \EventDescription $e, null | callback $callback = null) : \ResponseCollection

Trigger listeners

Actual functionality for triggering listeners, to which both trigger() and triggerUntil() delegate.

Parameters

Name	Type	Description
$event	string	Event name
$e	\EventDescription
$callback	null \| callback

Returns

Type	Description
\ResponseCollection

triggerUntil(string $event, string | object $target, array | \ArrayAccess $argv = null, Callable $callback = null) : void

Trigger listeners until return value of one causes a callback to evaluate to true

Triggers listeners until the provided callback evaluates the return value of one as true, or until all listeners have been executed.

Parameters

Name	Type	Description
$event	string
$target	string \| object	Object calling emit, or symbol describing target (such as static method name)
$argv	array \| \ArrayAccess	Array of arguments; typically, should be associative
$callback	Callable

Throws

Exception	Description
\Zend_Stdlib_Exception_InvalidCallbackException	if invalid callback provided

unsetSharedCollections() : void

Remove any shared collections

Sets {@link $sharedCollections} to boolean false to disable ability to lazy-load static event manager instance.

EventManager/EventManager.php

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Properties

Methods

\Zend_EventManager_EventManager
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