58 lines
2.4 KiB
PHP
58 lines
2.4 KiB
PHP
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Contracts\Cache;
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use Psr\Cache\CacheItemInterface;
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use Psr\Cache\InvalidArgumentException;
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/**
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* Covers most simple to advanced caching needs.
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*
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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interface CacheInterface
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{
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/**
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* Fetches a value from the pool or computes it if not found.
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*
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* On cache misses, a callback is called that should return the missing value.
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* This callback is given a PSR-6 CacheItemInterface instance corresponding to the
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* requested key, that could be used e.g. for expiration control. It could also
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* be an ItemInterface instance when its additional features are needed.
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*
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* @param string $key The key of the item to retrieve from the cache
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* @param callable|CallbackInterface $callback Should return the computed value for the given key/item
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* @param float|null $beta A float that, as it grows, controls the likeliness of triggering
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* early expiration. 0 disables it, INF forces immediate expiration.
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* The default (or providing null) is implementation dependent but should
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* typically be 1.0, which should provide optimal stampede protection.
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* See https://en.wikipedia.org/wiki/Cache_stampede#Probabilistic_early_expiration
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* @param array &$metadata The metadata of the cached item {@see ItemInterface::getMetadata()}
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*
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* @return mixed The value corresponding to the provided key
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*
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* @throws InvalidArgumentException When $key is not valid or when $beta is negative
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*/
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public function get(string $key, callable $callback, float $beta = null, array &$metadata = null);
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/**
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* Removes an item from the pool.
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*
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* @param string $key The key to delete
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*
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* @throws InvalidArgumentException When $key is not valid
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*
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* @return bool True if the item was successfully removed, false if there was any error
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*/
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public function delete(string $key): bool;
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}
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