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|
<?php
namespace Studip\Cache;
use Psr\Cache\CacheItemInterface;
/**
* The cache wrapper wraps a memory cache around another cache. This should
* reduce the accesses to the actual cache.
*
* @author Jan-Hendrik Willms <tleilax+studip@gmail.com>
* @license GPL2 or any later version
* @since Stud.IP 5.4
*/
class Wrapper extends Cache
{
protected Cache $actual_cache;
protected MemoryCache $memory_cache;
public function __construct(Cache $actual_cache)
{
$this->actual_cache = $actual_cache;
$this->memory_cache = new MemoryCache();
}
/**
* @inheritdoc
*/
public function expire($arg)
{
$this->memory_cache->expire($arg);
$this->actual_cache->expire($arg);
}
/**
* @inheritdoc
*/
public function flush()
{
$this->memory_cache->flush();
$this->actual_cache->flush();
}
public static function getDisplayName(): string
{
return static::class;
}
public function getStats(): array
{
return $this->actual_cache->getStats();
}
public static function getConfig(): array
{
return [];
}
/**
* @inheritDoc
*/
public function getItem(string $key): CacheItemInterface
{
$cached = $this->memory_cache->getItem($key);
if ($cached->isHit()) {
return $cached;
}
$cached = $this->actual_cache->getItem($key);
if ($cached->isHit()) {
$this->memory_cache->save($cached);
}
return $cached;
}
/**
* @inheritDoc
*/
public function hasItem(string $key): bool
{
return $this->actual_cache->hasItem($key);
}
/**
* @inheritDoc
*/
public function save(CacheItemInterface $item): bool
{
if ($this->actual_cache->save($item)) {
return $this->memory_cache->save($item);
} else {
return false;
}
}
}
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