78 lines
1.8 KiB
PHP
78 lines
1.8 KiB
PHP
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<?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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* Redis Cache Driver. This driver is based on Memcache driver
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*
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* @author Hypolite Petovan <mrpetovan@gmail.com>
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* @author Roland Haeder <roland@mxchange.org>
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*/
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class RedisCacheDriver extends BaseObject implements ICacheDriver
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{
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/**
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* @var Redis
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*/
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private $redis;
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public function __construct($redis_host, $redis_port)
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{
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if (!class_exists('Redis', false)) {
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throw new \Exception('Redis class isn\'t available');
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}
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$this->redis = new \Redis();
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if (!$this->redis->connect($redis_host, $redis_port)) {
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throw new \Exception('Expected Redis server at ' . $redis_host . ':' . $redis_port . ' isn\'t available');
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}
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}
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public function get($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->redis->get(self::getApp()->get_hostname() . ':' . $key);
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// @see http://php.net/manual/en/redis.get.php#84275
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if (is_bool($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->redis->set(
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self::getApp()->get_hostname() . ":" . $key,
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serialize($value),
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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 $this->redis->delete($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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