namespace Friendica\Core\Cache;
-use Friendica\BaseObject;
use Friendica\Core\Cache;
+use Exception;
+use Memcached;
+
/**
* Memcached Cache Driver
*
* @author Hypolite Petovan <mrpetovan@gmail.com>
*/
-class MemcachedCacheDriver extends BaseObject implements ICacheDriver
+class MemcachedCacheDriver extends AbstractCacheDriver implements IMemoryCacheDriver
{
+ use TraitCompareSet;
+ use TraitCompareDelete;
+
/**
- * @var Memcached
+ * @var \Memcached
*/
private $memcached;
+ /**
+ * Due to limitations of the INI format, the expected configuration for Memcached servers is the following:
+ * array {
+ * 0 => "hostname, port(, weight)",
+ * 1 => ...
+ * }
+ *
+ * @param array $memcached_hosts
+ * @throws \Exception
+ */
public function __construct(array $memcached_hosts)
{
if (!class_exists('Memcached', false)) {
- throw new \Exception('Memcached class isn\'t available');
+ throw new Exception('Memcached class isn\'t available');
}
- $this->memcached = new \Memcached();
+ $this->memcached = new Memcached();
+
+ array_walk($memcached_hosts, function (&$value) {
+ if (is_string($value)) {
+ $value = array_map('trim', explode(',', $value));
+ }
+ });
$this->memcached->addServers($memcached_hosts);
if (count($this->memcached->getServerList()) == 0) {
- throw new \Exception('Expected Memcached servers aren\'t available, config:' . var_export($memcached_hosts, true));
+ throw new Exception('Expected Memcached servers aren\'t available, config:' . var_export($memcached_hosts, true));
}
}
public function get($key)
{
$return = null;
+ $cachekey = $this->getCacheKey($key);
// We fetch with the hostname as key to avoid problems with other applications
- $value = $this->memcached->get(self::getApp()->get_hostname() . ':' . $key);
+ $value = $this->memcached->get($cachekey);
- if ($this->memcached->getResultCode() === \Memcached::RES_SUCCESS) {
+ if ($this->memcached->getResultCode() === Memcached::RES_SUCCESS) {
$return = $value;
}
return $return;
}
- public function set($key, $value, $duration = Cache::MONTH)
+ public function set($key, $value, $ttl = Cache::FIVE_MINUTES)
{
+ $cachekey = $this->getCacheKey($key);
+
// We store with the hostname as key to avoid problems with other applications
- return $this->memcached->set(
- self::getApp()->get_hostname() . ':' . $key,
- $value,
- time() + $duration
- );
+ if ($ttl > 0) {
+ return $this->memcached->set(
+ $cachekey,
+ $value,
+ $ttl
+ );
+ } else {
+ return $this->memcached->set(
+ $cachekey,
+ $value
+ );
+ }
+
}
public function delete($key)
{
- $return = $this->memcached->delete(self::getApp()->get_hostname() . ':' . $key);
+ $cachekey = $this->getCacheKey($key);
+ return $this->memcached->delete($cachekey);
+ }
- return $return;
+ public function clear($outdated = true)
+ {
+ if ($outdated) {
+ return true;
+ } else {
+ return $this->memcached->flush();
+ }
}
- public function clear()
+ /**
+ * @brief Sets a value if it's not already stored
+ *
+ * @param string $key The cache key
+ * @param mixed $value The old value we know from the cache
+ * @param int $ttl The cache lifespan, must be one of the Cache constants
+ * @return bool
+ */
+ public function add($key, $value, $ttl = Cache::FIVE_MINUTES)
{
- return true;
+ $cachekey = $this->getCacheKey($key);
+ return $this->memcached->add($cachekey, $value, $ttl);
}
}