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EVENTS.md

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📣 As of the V6, Phpfastcache provides an event mechanism. You can subscribe to an event by passing a Closure to an active event:

use Phpfastcache\EventManager;

/**
* Bind the event callback
*/
EventManager::getInstance()->onCacheGetItem(function(ExtendedCacheItemPoolInterface $itemPool, ExtendedCacheItemInterface $item){
    $item->set('[HACKED BY EVENT] ' . $item->get());
});

An event callback can get unbind but you MUST provide a name to the callback previously:

use Phpfastcache\EventManager;

/**
* Bind the event callback
*/
EventManager::getInstance()->onCacheGetItem(function(ExtendedCacheItemPoolInterface $itemPool, ExtendedCacheItemInterface $item){
    $item->set('[HACKED BY EVENT] ' . $item->get());
}, 'myCallbackName');


/**
* Unbind the event callback
*/
EventManager::getInstance()->unbindEventCallback('onCacheGetItem', 'myCallbackName');

🆕 in V8

You can simply subscribe to every events at once of Phpfastcache.

<?php
use Phpfastcache\EventManager;

EventManager::getInstance()->onEveryEvents(static function (string $eventName, ...$args) {
    echo sprintf("Triggered event '{$eventName}' with %d arguments provided", count($args));
}, 'debugCallback');

This is an exhaustive list, and it will be updated as soon as new events will be added to the Core.

🆕 In V9

  • Some callback parameter, that are NOT objects, are passed by reference via the new \Phpfastcache\Event\EventReferenceParameter class.
    This class is instantiated and passed to the callback with the original value passed by reference allowing you to either read or re-write its value.
    If it's allowed by the event dispatcher the type can be changed or not.
    If you try to while it's not allowed, you will get a PhpfastcacheInvalidArgumentException when trying to call \Phpfastcache\Event\EventReferenceParameter::setParameterValue()
    Finally the class \Phpfastcache\Event\EventReferenceParameter is invokable and trying to do so will return you the parameter value.\
  • A method named unbindAllEventCallbacks(): bool has been added to EventManagerInterface to allow you to unbind/clear all event from an event instance.
  • Event callbacks will now receive the eventName as an extra last callback parameter (except for onEveryEvents callbacks)
  • Added EventManagerInterface::on(array $eventNames, $callback) method, to subscribe to multiple events in once with the same callback

⚠️ Changed in V9.2

As of the V9.2 there is a slight change with the EventManager: EventManager is now scoped to its own poll if retrieved through ExtendedCacheItemPoolTrait::->getEventManager(). This means, that the behavior is not more consistent:
An EventManager retrieved through ExtendedCacheItemPoolTrait::->getEventManager() will now ONLY fire events related to this pool instance.
However, the global EventManager EventManager::getInstance() remains unchanged and will fire any events no matter what pool emitted it. The order of execution of the events is always the following:

  1. Scoped named Event through ExtendedCacheItemPoolTrait::->getEventManager()->onXxxxxXxxxx(...)
  2. Scoped onEveryEvent Event through ExtendedCacheItemPoolTrait::->getEventManager()->onEveryEvent(...)
  3. Unscoped named event through EventManager::getInstance()->onXxxxxXxxxx(...)
  4. Unscoped onEveryEvent event through EventManager::getInstance()->onEveryEvent(...)

List of active events:

ItemPool Events

  • onCacheGetItem(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • ExtendedCacheItemInterface $item
    • Scope
      • ItemPool
    • Description
      • Allow you to manipulate an item just before it gets returned by the getItem() method.
    • Risky Circular Methods
      • ExtendedCacheItemPoolInterface::getItem()
      • ExtendedCacheItemPoolInterface::getItems()
      • ExtendedCacheItemPoolInterface::getItemsByTag()
      • ExtendedCacheItemPoolInterface::getItemsAsJsonString()

  • onCacheGetItems(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • ExtendedCacheItemInterface[] $items
    • Scope
      • ItemPool
    • Description
      • Allow you to manipulate a set of items just before it gets returned by the getItems() method.
    • Risky Circular Methods
      • ExtendedCacheItemPoolInterface::getItem()
      • ExtendedCacheItemPoolInterface::getItems()
      • ExtendedCacheItemPoolInterface::getItemsByTag()
      • ExtendedCacheItemPoolInterface::getItemsAsJsonString()

  • onCacheDeleteItem(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • ExtendedCacheItemInterface $item
    • Scope
      • ItemPool
    • Description
      • Allow you to manipulate an item after being deleted (this event is not fired if deleteItems() is called). ❗ Caution The provided item is in pool detached-state.
    • Risky Circular Methods
      • ExtendedCacheItemPoolInterface::deleteItem()
      • ExtendedCacheItemPoolInterface::deleteItems()
      • ExtendedCacheItemPoolInterface::getItem()
      • ExtendedCacheItemPoolInterface::getItems()
      • ExtendedCacheItemPoolInterface::getItemsByTag()
      • ExtendedCacheItemPoolInterface::getItemsAsJsonString()

  • onCacheDeleteItems(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • ExtendedCacheItemInterface[] $items
    • Scope
      • ItemPool
    • Description
      • Allow you to manipulate multiple items after being deleted. ❗ Caution The provided item is in pool detached-state.
    • Risky Circular Methods
      • ExtendedCacheItemPoolInterface::deleteItem()
      • ExtendedCacheItemPoolInterface::deleteItems()
      • ExtendedCacheItemPoolInterface::getItem()
      • ExtendedCacheItemPoolInterface::getItems()
      • ExtendedCacheItemPoolInterface::getItemsByTag()
      • ExtendedCacheItemPoolInterface::getItemsAsJsonString()

  • onCacheSaveItem(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • ExtendedCacheItemInterface $item
    • Scope
      • ItemPool
    • Description
      • Allow you to manipulate an item just before it gets saved by the driver.
    • Risky Circular Methods
      • ExtendedCacheItemPoolInterface::commit()
      • ExtendedCacheItemPoolInterface::save()

  • onCacheSaveMultipleItems(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • EventReferenceParameter($items) $items via EventReferenceParameter object (type modification forbidden)
    • Scope
      • ItemPool
    • Description
      • Allow you to manipulate an array of items before they get saved by the driver.
    • Risky Circular Methods
      • ExtendedCacheItemPoolInterface::commit()
      • ExtendedCacheItemPoolInterface::save()
      • ExtendedCacheItemPoolInterface::saveMultiple()

  • onCacheSaveDeferredItem(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • ExtendedCacheItemInterface $item
    • Scope
      • ItemPool
    • Description
      • Allow you to manipulate an item just before it gets pre-saved by the driver.
    • Risky Circular Methods
      • ExtendedCacheItemPoolInterface::saveDeferred()

  • onCacheCommitItem(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • EventReferenceParameter($items) $items via EventReferenceParameter object (type modification forbidden)
    • Scope
      • ItemPool
    • Description
      • Allow you to manipulate and/or alter a set of items just before they gets pre-saved by the driver.
    • Risky Circular Methods
      • ExtendedCacheItemPoolInterface::commit()

  • onCacheClearItem(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • ExtendedCacheItemInterface[] $items
    • Scope
      • ItemPool
    • Description
      • Allow you to manipulate a set of item just before they gets cleared by the driver.
    • Risky Circular Methods
      • ExtendedCacheItemPoolInterface::clear()
      • ExtendedCacheItemPoolInterface::clean()

  • onCacheWriteFileOnDisk(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • string $file
      • bool $secureFileManipulation
    • Scope
      • ItemPool
    • Description
      • Allow you to get notified when a file is written on disk.
    • Risky Circular Methods
      • ExtendedCacheItemPoolInterface::writefile()

  • onCacheGetItemInSlamBatch(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • ItemBatch $driverData
      • int $cacheSlamsSpendSeconds
    • Scope
      • ItemPool
    • Description
      • Allow you to get notified each time a batch loop is looping
    • Risky Circular Methods
      • ExtendedCacheItemPoolInterface::deleteItem()
      • ExtendedCacheItemPoolInterface::getItem()
      • ExtendedCacheItemPoolInterface::getItems()
      • ExtendedCacheItemPoolInterface::getItemsByTag()
      • ExtendedCacheItemPoolInterface::getItemsAsJsonString()

  • onCacheDriverChecked(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
    • Scope
      • ItemPool
    • Description
      • Allow you to bind an event when the driver prerequisites has passed but before it the driverConnect() is called.
    • Risky Circular Methods
      • (none)

  • onCacheDriverConnected(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemPoolInterface $itemPool
      • object $instance Internal instance of the backend connect
    • Scope
      • ItemPool
    • Description
      • Allow you to bind an event when the driver backend has been successfully instantiated and connected/authenticated (where applicable).
    • Risky Circular Methods
      • (none)

ItemPool Events (Cluster)

  • onCacheReplicationSlaveFallback(Callable $callback)

    • Callback arguments
      • ClusterPoolInterface $self
      • string $caller
    • Scope
      • Cluster pool
    • Description
      • Allow you to get notified when a Master/Slave cluster switches on slave
    • Risky Circular Methods
      • N/A

  • onCacheReplicationRandomPoolChosen(Callable $callback)

    • Callback arguments
      • ClusterPoolInterface $self
      • ExtendedCacheItemPoolInterface $randomPool
    • Scope
      • Cluster pool
    • Description
      • Allow you to get notified when a Random Replication cluster choose a cluster
    • Risky Circular Methods
      • N/A

  • onCacheClusterBuilt(Callable $callback)

    • Callback arguments
      • AggregatorInterface $clusterAggregator
      • ClusterPoolInterface $cluster
    • Scope
      • Cluster aggregator
    • Description
      • Allow you to get notified when a cluster is being built
    • Risky Circular Methods
      • $clusterAggregator::getCluster()

Item Events

  • onCacheItemSet(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemInterface $item
      • EventReferenceParameter($value) $value via EventReferenceParameter object (type modification allowed)
    • Scope
      • Item
    • Description
      • Allow you to read (and rewrite) the value set to an item.
    • Risky Circular Methods
      • ExtendedCacheItemInterface::get()

  • onCacheItemExpireAt(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemInterface $item
      • \DateTimeInterface $expiration
    • Scope
      • Item
    • Description
      • Allow you to get/set the expiration date of an item.
    • Risky Circular Methods
      • ExtendedCacheItemInterface::expiresAt()

  • onCacheItemExpireAfter(Callable $callback)

    • Callback arguments
      • ExtendedCacheItemInterface $item
      • int | \DateInterval $time
    • Scope
      • Item
    • Description
      • Allow you to get the "expire after" time of an item. If $time is a DateInterval you also set it.
    • Risky Circular Methods
      • ExtendedCacheItemInterface::expiresAt()

Driver-specific Events (as of V9)

Arangodb

See Arangodb extension event documentation.

Couchdb (v9.2)

See Couchdb extension event documentation.

Dynamodb

See Dynamodb extension event documentation.

Solr

See Solr extension event documentation.