added apc session driver.

application/config/session.php

@@ -12,7 +12,7 @@ return array(
 	| Since HTTP is stateless, sessions are used to maintain "state" across
 	| multiple requests from the same user of your application.
 	|
-	| Supported Drivers: 'file', 'db', 'memcached'.
+	| Supported Drivers: 'file', 'db', 'memcached', 'apc'.
 	|
 	*/
 

system/session/driver/apc.php

@@ -0,0 +1,49 @@
+<?php namespace System\Session\Driver;
+
+class APC implements \System\Session\Driver {
+
+	/**
+	 * Load a session by ID.
+	 *
+	 * @param  string  $id
+	 * @return array
+	 */
+	public function load($id)
+	{
+		return \System\Cache::driver('apc')->get($id);
+	}
+
+	/**
+	 * Save a session.
+	 *
+	 * @param  array  $session
+	 * @return void
+	 */
+	public function save($session)
+	{
+		\System\Cache::driver('apc')->put($session['id'], $session, \System\Config::get('session.lifetime'));
+	}
+
+	/**
+	 * Delete a session by ID.
+	 *
+	 * @param  string  $id
+	 * @return void
+	 */
+	public function delete($id)
+	{
+		\System\Cache::driver('apc')->forget($id);
+	}
+
+	/**
+	 * Delete all expired sessions.
+	 *
+	 * @param  int   $expiration
+	 * @return void
+	 */
+	public function sweep($expiration)
+	{
+		// APC sessions will expire automatically.
+	}
+
+}

system/session/factory.php

@@ -21,6 +21,9 @@ class Factory {
 			case 'memcached':
 				return new Driver\Memcached;
 
+			case 'apc':
+				return new Driver\APC;
+
 			default:
 				throw new \Exception("Session driver [$driver] is not supported.");
 		}