Ensure Horde_Cache is an optional dependency.

diff --git a/framework/Kolab_Server/lib/Horde/Kolab/Server.php b/framework/Kolab_Server/lib/Horde/Kolab/Server.php
index 85b6c34..b3a996b 100644 (file)
--- a/framework/Kolab_Server/lib/Horde/Kolab/Server.php
+++ b/framework/Kolab_Server/lib/Horde/Kolab/Server.php
@@ -206,7 +206,8 @@ abstract class Horde_Kolab_Server
     function shutdown()
     {
         if (isset($this->attributes)) {
-            if (!empty($GLOBALS['conf']['kolab']['server']['cache']['driver'])) {
+            if (!empty($GLOBALS['conf']['kolab']['server']['cache']['driver'])
+               && class_exists('Horde_Cache')) {
                 $params = isset($GLOBALS['conf']['kolab']['server']['cache']['params'])
                     ? $GLOBALS['conf']['kolab']['server']['cache']['params'] : null;
                 $cache  = Horde_Cache::singleton($GLOBALS['conf']['kolab']['server']['cache']['driver'],
@@ -387,7 +388,8 @@ abstract class Horde_Kolab_Server
         static $lifetime;
 
         if (!isset($this->attributes)) {
-            if (!empty($GLOBALS['conf']['kolab']['server']['cache']['driver'])) {
+            if (!empty($GLOBALS['conf']['kolab']['server']['cache']['driver'])
+               && class_exists('Horde_Cache')) {
                 $params = isset($GLOBALS['conf']['kolab']['server']['cache']['params'])
                     ? $GLOBALS['conf']['kolab']['server']['cache']['params'] : null;
                 $cache  = Horde_Cache::singleton($GLOBALS['conf']['kolab']['server']['cache']['driver'],