78 lines
1.8 KiB
PHP
78 lines
1.8 KiB
PHP
<?php
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namespace Friendica\Core\Cache;
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use Friendica\BaseObject;
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use Friendica\Core\Cache;
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/**
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* Memcache Cache Driver
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*
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* @author Hypolite Petovan <mrpetovan@gmail.com>
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*/
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class MemcacheCacheDriver extends BaseObject implements ICacheDriver
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{
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/**
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* @var Memcache
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*/
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private $memcache;
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public function __construct($memcache_host, $memcache_port)
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{
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if (!class_exists('Memcache', false)) {
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throw new \Exception('Memcache class isn\'t available');
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}
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$this->memcache = new \Memcache();
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if (!$this->memcache->connect($memcache_host, $memcache_port)) {
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throw new \Exception('Expected Memcache server at ' . $memcache_host . ':' . $memcache_port . ' isn\'t available');
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}
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}
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public function get($key)
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{
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$return = null;
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// We fetch with the hostname as key to avoid problems with other applications
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$cached = $this->memcache->get(self::getApp()->get_hostname() . ':' . $key);
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// @see http://php.net/manual/en/memcache.get.php#84275
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if (is_bool($cached) || is_double($cached) || is_long($cached)) {
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return $return;
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}
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$value = @unserialize($cached);
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// Only return a value if the serialized value is valid.
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// We also check if the db entry is a serialized
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// boolean 'false' value (which we want to return).
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if ($cached === serialize(false) || $value !== false) {
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$return = $value;
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}
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return $return;
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}
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public function set($key, $value, $duration = Cache::MONTH)
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{
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// We store with the hostname as key to avoid problems with other applications
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return $this->memcache->set(
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self::getApp()->get_hostname() . ":" . $key,
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serialize($value),
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MEMCACHE_COMPRESSED,
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time() + $duration
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);
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}
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public function delete($key)
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{
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return $this->memcache->delete($key);
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}
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public function clear()
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{
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return true;
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}
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}
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