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<?php
declare(strict_types=1);
/*
* This file is part of Bounded Cache.
*
* (c) Graham Campbell <hello@gjcampbell.co.uk>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace GrahamCampbell\BoundedCache;
use DateInterval;
use Psr\SimpleCache\CacheInterface;
/**
* This is the bounded cache class.
*
* @author Graham Campbell <hello@gjcampbell.co.uk>
*/
final class BoundedCache implements BoundedCacheInterface
{
/**
* The underlying cache instance.
*/
private CacheInterface $cache;
/**
* The minimum cache lifetime.
*/
private int $min;
/**
* The maximum cache lifetime.
*/
private int $max;
/**
* Create a bounded cache instance.
*
* @return void
*/
public function __construct(CacheInterface $cache, int $min, int $max)
{
$this->cache = $cache;
$this->min = $min;
$this->max = $max;
}
/**
* Get the minimum cache lifetime.
*/
public function getMinimumLifetime(): int
{
return $this->min;
}
/**
* Get the maximum cache lifetime.
*/
public function getMaximumLifetime(): int
{
return $this->max;
}
/**
* Fetches a value from the cache.
*
* @throws \Psr\SimpleCache\InvalidArgumentException
*/
public function get(string $key, mixed $default = null): mixed
{
return $this->cache->get($key, $default);
}
/**
* Persists data in the cache, uniquely referenced by a key.
*
* @throws \Psr\SimpleCache\InvalidArgumentException
*
* @return bool
*/
public function set(string $key, mixed $value, null|int|DateInterval $ttl = null): bool
{
return $this->cache->set($key, $value, $this->computeTtl($ttl));
}
/**
* Delete an item from the cache by its unique key.
*
* @throws \Psr\SimpleCache\InvalidArgumentException
*/
public function delete(string $key): bool
{
return $this->cache->delete($key);
}
/**
* Wipes clean the entire cache's keys.
*
* @return bool
*/
public function clear(): bool
{
return $this->cache->clear();
}
/**
* Obtains multiple cache items by their unique keys.
*
* @param iterable<string> $keys
*
* @throws \Psr\SimpleCache\InvalidArgumentException
*
* @return iterable<string, mixed>
*/
public function getMultiple(iterable $keys, mixed $default = null): iterable
{
return $this->cache->getMultiple($keys, $default);
}
/**
* Persists a set of key => value pairs in the cache.
*
* @throws \Psr\SimpleCache\InvalidArgumentException
*/
public function setMultiple(iterable $values, null|int|\DateInterval $ttl = null): bool
{
return $this->cache->setMultiple($values, $this->computeTtl($ttl));
}
/**
* Deletes multiple cache items in a single operation.
*
* @param iterable<string> $keys
*
* @throws \Psr\SimpleCache\InvalidArgumentException
*/
public function deleteMultiple(iterable $keys): bool
{
return $this->cache->deleteMultiple($keys);
}
/**
* Determines whether an item is present in the cache.
*
* @throws \Psr\SimpleCache\InvalidArgumentException
*/
public function has(string $key): bool
{
return $this->cache->has($key);
}
/**
* Computes the TTL to use.
*/
private function computeTtl(null|int|DateInterval $ttl): int
{
return TtlHelper::computeTtl($this->min, $this->max, $ttl);
}
}
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