CodeIgniter installed

[living-lab-site.git] / system / libraries / Cache / drivers / Cache_apc.php

diff --git a/system/libraries/Cache/drivers/Cache_apc.php b/system/libraries/Cache/drivers/Cache_apc.php
new file mode 100755 (executable)
index 0000000..de75719
--- /dev/null
+++ b/system/libraries/Cache/drivers/Cache_apc.php
@@ -0,0 +1,151 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.1.6 or newer
+ *
+ * @package            CodeIgniter
+ * @author             ExpressionEngine Dev Team
+ * @copyright  Copyright (c) 2006 - 2011 EllisLab, Inc.
+ * @license            http://codeigniter.com/user_guide/license.html
+ * @link               http://codeigniter.com
+ * @since              Version 2.0
+ * @filesource 
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * CodeIgniter APC Caching Class 
+ *
+ * @package            CodeIgniter
+ * @subpackage Libraries
+ * @category   Core
+ * @author             ExpressionEngine Dev Team
+ * @link               
+ */
+
+class CI_Cache_apc extends CI_Driver {
+
+       /**
+        * Get 
+        *
+        * Look for a value in the cache.  If it exists, return the data 
+        * if not, return FALSE
+        *
+        * @param       string  
+        * @return      mixed           value that is stored/FALSE on failure
+        */
+       public function get($id)
+       {
+               $data = apc_fetch($id);
+
+               return (is_array($data)) ? $data[0] : FALSE;
+       }
+
+       // ------------------------------------------------------------------------     
+       
+       /**
+        * Cache Save
+        *
+        * @param       string          Unique Key
+        * @param       mixed           Data to store
+        * @param       int                     Length of time (in seconds) to cache the data
+        *
+        * @return      boolean         true on success/false on failure
+        */
+       public function save($id, $data, $ttl = 60)
+       {
+               return apc_store($id, array($data, time(), $ttl), $ttl);
+       }
+       
+       // ------------------------------------------------------------------------
+
+       /**
+        * Delete from Cache
+        *
+        * @param       mixed           unique identifier of the item in the cache
+        * @param       boolean         true on success/false on failure
+        */
+       public function delete($id)
+       {
+               return apc_delete($id);
+       }
+
+       // ------------------------------------------------------------------------
+
+       /**
+        * Clean the cache
+        *
+        * @return      boolean         false on failure/true on success
+        */
+       public function clean()
+       {
+               return apc_clear_cache('user');
+       }
+
+       // ------------------------------------------------------------------------
+
+       /**
+        * Cache Info
+        *
+        * @param       string          user/filehits
+        * @return      mixed           array on success, false on failure      
+        */
+        public function cache_info($type = NULL)
+        {
+                return apc_cache_info($type);
+        }
+
+       // ------------------------------------------------------------------------
+
+       /**
+        * Get Cache Metadata
+        *
+        * @param       mixed           key to get cache metadata on
+        * @return      mixed           array on success/false on failure
+        */
+       public function get_metadata($id)
+       {
+               $stored = apc_fetch($id);
+
+               if (count($stored) !== 3)
+               {
+                       return FALSE;
+               }
+
+               list($data, $time, $ttl) = $stored;
+
+               return array(
+                       'expire'        => $time + $ttl,
+                       'mtime'         => $time,
+                       'data'          => $data
+               );
+       }
+
+       // ------------------------------------------------------------------------
+
+       /**
+        * is_supported()
+        *
+        * Check to see if APC is available on this system, bail if it isn't.
+        */
+       public function is_supported()
+       {
+               if ( ! extension_loaded('apc') OR ! function_exists('apc_store'))
+               {
+                       log_message('error', 'The APC PHP extension must be loaded to use APC Cache.');
+                       return FALSE;
+               }
+               
+               return TRUE;
+       }
+
+       // ------------------------------------------------------------------------
+
+       
+}
+// End Class
+
+/* End of file Cache_apc.php */
+/* Location: ./system/libraries/Cache/drivers/Cache_apc.php */
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