-<?php\r
-\r
-namespace Friendica\Core\Cache;\r
-\r
-use Friendica\BaseObject;\r
-use Friendica\Core\Cache;\r
-\r
-/**\r
- * Memcached Cache Driver\r
- *\r
- * @author Hypolite Petovan <mrpetovan@gmail.com>\r
- */\r
-class MemcachedCacheDriver extends BaseObject implements ICacheDriver\r
-{\r
- /**\r
- * @var Memcached\r
- */\r
- private $memcached;\r
-\r
- public function __construct(array $memcached_hosts)\r
- {\r
- if (!class_exists('Memcached', false)) {\r
- throw new \Exception('Memcached class isn\'t available');\r
- }\r
-\r
- $this->memcached = new \Memcached();\r
-\r
- $this->memcached->addServers($memcached_hosts);\r
-\r
- if (count($this->memcached->getServerList()) == 0) {\r
- throw new \Exception('Expected Memcached servers aren\'t available, config:' . var_export($memcached_hosts, true));\r
- }\r
- }\r
-\r
- public function get($key)\r
- {\r
- $return = null;\r
-\r
- // We fetch with the hostname as key to avoid problems with other applications\r
- $value = $this->memcached->get(self::getApp()->get_hostname() . ':' . $key);\r
-\r
- if ($this->memcached->getResultCode() === \Memcached::RES_SUCCESS) {\r
- $return = $value;\r
- }\r
-\r
- return $return;\r
- }\r
-\r
- public function set($key, $value, $duration = Cache::MONTH)\r
- {\r
- // We store with the hostname as key to avoid problems with other applications\r
- return $this->memcached->set(\r
- self::getApp()->get_hostname() . ":" . $key,\r
- $value,\r
- Cache::duration($duration)\r
- );\r
- }\r
-\r
- public function delete($key)\r
- {\r
- return $this->memcached->delete($key);\r
- }\r
-\r
- public function clear()\r
- {\r
- return true;\r
- }\r
-}\r
+<?php
+
+namespace Friendica\Core\Cache;
+
+use Friendica\Core\Cache;
+
+use Exception;
+use Memcached;
+
+/**
+ * Memcached Cache Driver
+ *
+ * @author Hypolite Petovan <mrpetovan@gmail.com>
+ */
+class MemcachedCacheDriver extends AbstractCacheDriver implements IMemoryCacheDriver
+{
+ use TraitCompareSet;
+ use TraitCompareDelete;
+
+ /**
+ * @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');
+ }
+
+ $this->memcached = new Memcached();
+
+ array_walk($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));
+ }
+ }
+
+ public function get($key)
+ {
+ $return = null;
+ $cachekey = $this->getCacheKey($key);
+
+ // We fetch with the hostname as key to avoid problems with other applications
+ $value = $this->memcached->get($cachekey);
+
+ if ($this->memcached->getResultCode() === Memcached::RES_SUCCESS) {
+ $return = $value;
+ }
+
+ return $return;
+ }
+
+ public function set($key, $value, $ttl = Cache::FIVE_MINUTES)
+ {
+ $cachekey = $this->getCacheKey($key);
+
+ // We store with the hostname as key to avoid problems with other applications
+ if ($ttl > 0) {
+ return $this->memcached->set(
+ $cachekey,
+ $value,
+ $ttl
+ );
+ } else {
+ return $this->memcached->set(
+ $cachekey,
+ $value
+ );
+ }
+
+ }
+
+ public function delete($key)
+ {
+ $cachekey = $this->getCacheKey($key);
+ return $this->memcached->delete($cachekey);
+ }
+
+ public function clear($outdated = true)
+ {
+ if ($outdated) {
+ return true;
+ } else {
+ return $this->memcached->flush();
+ }
+ }
+
+ /**
+ * @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)
+ {
+ $cachekey = $this->getCacheKey($key);
+ return $this->memcached->add($cachekey, $value, $ttl);
+ }
+}