Ticket #27470: 27470.patch

wp-includes/class-feed.php

@@ -11 +11 @@
          * @access public
          */
         function create($location, $filename, $extension) {
-                return new WP_Feed_Cache_Transient($location, $filename, $extension);
+                if (defined('MEMCACHE_SERVER')) {
+                        return new WP_Feed_Cache_Memcache($location, $filename, $extension);
+                } else {
+                        return new WP_Feed_Cache_Transient($location, $filename, $extension);
+                }
         }
 }
 
@@ -64 +68 @@
         }
 }
 
+/**
+ * Same as WP_Feed_Cache_Transient but use memcache as the backend
+ * In WP_Feed_Cache, it will only be activated when MEMCACHE_SEVER is defined in wp-config
+ */
+class WP_Feed_Cache_Memcache {
+        var $name;
+        var $mod_name;
+        var $lifetime = 43200; //Default lifetime in cache of 12 hours
+        var $memcache = null;
+        var $memcache_prefix = "";
+
+        function __construct($location, $filename, $extension) {
+                $this->name = 'feed_' . $filename;
+                $this->mod_name = 'feed_mod_' . $filename;
+
+                $lifetime = $this->lifetime;
+                /**
+                 * Filter the transient lifetime of the feed cache.
+                 *
+                 * @since 2.8.0
+                 *
+                 * @param int    $lifetime Cache duration in seconds. Default is 43200 seconds (12 hours).
+                 * @param string $filename Unique identifier for the cache object.
+                 */
+                $this->lifetime = apply_filters( 'wp_feed_cache_transient_lifetime', $lifetime, $filename);
+
+                $this->memcache = new Memcache();
+
+                // MEMCACHE_SERVER is from wp-config
+                $this->memcache->connect(MEMCACHE_SERVER, 11211);
+                $this->memcache_prefix = DB_NAME."::";
+        }
+
+        function save($data) {
+                if ( is_a($data, 'SimplePie') )
+                        $data = $data->data;
+
+                $this->memcache->set($this->memcache_prefix . $this->name, $data, $this->lifetime);
+                $this->memcache->set($this->memcache_prefix . $this->mod_name, time(), $this->lifetime);
+                return true;
+        }
+
+        function load() {
+                return $this->memcache->get($this->memcache_prefix . $this->name);
+        }
+
+        function mtime() {
+                return $this->memcache->get($this->memcache_prefix . $this->mod_name);
+        }
+
+        function touch() {
+                return $this->memcache->set($this->memcache_prefix . $this->mod_name, time(), $this->lifetime);
+        }
+
+        function unlink() {
+                $this->memcache->delete($this->memcache_prefix . $this->name);
+                $this->memcache->delete($this->memcache_prefix . $this->mod_name);
+                return true;
+        }
+}
+
 class WP_SimplePie_File extends SimplePie_File {
 
         function __construct($url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false) {