mirror of
https://github.com/friendica/friendica
synced 2024-11-14 12:22:54 +00:00
94 lines
2.1 KiB
PHP
94 lines
2.1 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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* Memcached 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 MemcachedCacheDriver extends BaseObject implements IMemoryCacheDriver
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{
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use TraitCompareSet;
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use TraitCompareDelete;
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/**
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* @var Memcached
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*/
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private $memcached;
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public function __construct(array $memcached_hosts)
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{
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if (!class_exists('Memcached', false)) {
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throw new \Exception('Memcached class isn\'t available');
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}
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$this->memcached = new \Memcached();
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$this->memcached->addServers($memcached_hosts);
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if (count($this->memcached->getServerList()) == 0) {
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throw new \Exception('Expected Memcached servers aren\'t available, config:' . var_export($memcached_hosts, true));
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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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$value = $this->memcached->get(self::getApp()->get_hostname() . ':' . $key);
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if ($this->memcached->getResultCode() === \Memcached::RES_SUCCESS) {
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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, $ttl = Cache::FIVE_MINUTES)
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{
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// We store with the hostname as key to avoid problems with other applications
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if ($ttl > 0) {
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return $this->memcached->set(
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self::getApp()->get_hostname() . ':' . $key,
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$value,
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time() + $ttl
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);
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} else {
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return $this->memcached->set(
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self::getApp()->get_hostname() . ':' . $key,
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$value
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);
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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->memcached->delete(self::getApp()->get_hostname() . ':' . $key);
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return $return;
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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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* @brief Sets a value if it's not already stored
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*
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* @param string $key The cache key
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* @param mixed $value The old value we know from the cache
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* @param int $ttl The cache lifespan, must be one of the Cache constants
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* @return bool
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*/
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public function add($key, $value, $ttl = Cache::FIVE_MINUTES)
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{
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return $this->memcached->add(self::getApp()->get_hostname() . ":" . $key, $value, $ttl);
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}
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}
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