From a944a143a2a468db7f818b06f2d45eb1406ab0de Mon Sep 17 00:00:00 2001
From: Tim Otten <totten@civicrm.org>
Date: Tue, 15 Sep 2015 20:53:53 -0700
Subject: [PATCH] Memcache for extension, setting, and string caches

---
 CRM/Extension/System.php       | 2 +-
 CRM/Utils/Cache.php            | 9 +++++++++
 Civi/Core/Container.php        | 2 +-
 Civi/Core/SettingsMetadata.php | 4 ++--
 4 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/CRM/Extension/System.php b/CRM/Extension/System.php
index a04d63cb7c..6b4a07de85 100644
--- a/CRM/Extension/System.php
+++ b/CRM/Extension/System.php
@@ -244,7 +244,7 @@ class CRM_Extension_System {
       // Extension system starts before container. Manage our own cache.
       $this->cache = CRM_Utils_Cache::create(array(
         'name' => $cacheGroup,
-        'type' => array('SqlGroup', 'ArrayCache'),
+        'type' => array('*memory*', 'SqlGroup', 'ArrayCache'),
         'prefetch' => TRUE,
       ));
     }
diff --git a/CRM/Utils/Cache.php b/CRM/Utils/Cache.php
index 5caa450dbe..df0427c238 100644
--- a/CRM/Utils/Cache.php
+++ b/CRM/Utils/Cache.php
@@ -182,6 +182,15 @@ class CRM_Utils_Cache {
 
     foreach ($types as $type) {
       switch ($type) {
+        case '*memory*':
+          if (defined('CIVICRM_DB_CACHE_CLASS') && in_array(CIVICRM_DB_CACHE_CLASS, array('Memcache', 'Memcached'))) {
+            $dbCacheClass = 'CRM_Utils_Cache_' . CIVICRM_DB_CACHE_CLASS;
+            $settings = self::getCacheSettings(CIVICRM_DB_CACHE_CLASS);
+            $settings['prefix'] = $settings['prefix'] . '_' . $params['name'];
+            return new $dbCacheClass($settings);
+          }
+          break;
+
         case 'SqlGroup':
           if (defined('CIVICRM_DSN') && CIVICRM_DSN) {
             return new CRM_Utils_Cache_SqlGroup(array(
diff --git a/Civi/Core/Container.php b/Civi/Core/Container.php
index e1d0132e02..5488a44567 100644
--- a/Civi/Core/Container.php
+++ b/Civi/Core/Container.php
@@ -180,7 +180,7 @@ class Container {
         array(
           array(
             'name' => $cacheName,
-            'type' => array('SqlGroup', 'ArrayCache'),
+            'type' => array('*memory*', 'SqlGroup', 'ArrayCache'),
           ),
         )
       ))->setFactoryClass('CRM_Utils_Cache')->setFactoryMethod('create');
diff --git a/Civi/Core/SettingsMetadata.php b/Civi/Core/SettingsMetadata.php
index fd70a8ca99..1fe89496b3 100644
--- a/Civi/Core/SettingsMetadata.php
+++ b/Civi/Core/SettingsMetadata.php
@@ -75,9 +75,9 @@ class SettingsMetadata {
     // the caching into 'All' seems to be a duplicate of caching to
     // settingsMetadata__ - I think the reason was to cache all settings as defined & then those altered by a hook
     $settingsMetadata = $cache->get($cacheString);
-    $cached = ($settingsMetadata === NULL);
+    $cached = is_array($settingsMetadata);
 
-    if ($settingsMetadata === NULL) {
+    if (!$cached) {
       $settingsMetadata = $cache->get(self::ALL);
       if (empty($settingsMetadata)) {
         global $civicrm_root;
-- 
2.25.1