Update "mrpetovan" email address

[friendica.git/.git] / src / Core / Cache / MemcachedCacheDriver.php

diff --git a/src/Core/Cache/MemcachedCacheDriver.php b/src/Core/Cache/MemcachedCacheDriver.php
index d6b8d4a..9e9c00f 100644 (file)
--- a/src/Core/Cache/MemcachedCacheDriver.php
+++ b/src/Core/Cache/MemcachedCacheDriver.php
@@ -2,67 +2,118 @@
 
 namespace Friendica\Core\Cache;
 
-use Friendica\BaseObject;
 use Friendica\Core\Cache;
 
+use Exception;
+use Memcached;
+
 /**
  * Memcached Cache Driver
  *
- * @author Hypolite Petovan <mrpetovan@gmail.com>
+ * @author Hypolite Petovan <hypolite@mrpetovan.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 $this->memcached->delete($key);
+               $cachekey = $this->getCacheKey($key);
+               return $this->memcached->delete($cachekey);
        }
 
-       public function clear()
+       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)
        {
-               return true;
+               $cachekey = $this->getCacheKey($key);
+               return $this->memcached->add($cachekey, $value, $ttl);
        }
 }