Closes #831: Plugin view location is now cached in a file in dataroot and is invalidated on upgrade and plugin enable/disable/reorder. This means that views no longer have to be discovered on boot - reducing file IO from crazy amounts to 1. This also helps make adding new plugins a linear event.

git-svn-id: https://code.elgg.org/elgg/trunk@3025 36083f99-b078-4883-b0ff-0f9b5a30f544

2 files changed, 50 insertions, 14 deletions

diff --git a/engine/lib/elgglib.php b/engine/lib/elgglib.php
index 1b2629a22..5571339cd 100644
--- a/engine/lib/elgglib.php
+++ b/engine/lib/elgglib.php
@@ -496,6 +496,21 @@
 		}
 		
 		/**
+		 * This is a factory function which produces an ElggCache object suitable for caching file load paths.
+		 *
+		 * TODO: Can this be done in a cleaner way?
+		 * TODO: Swap to memcache etc?
+		 */
+		function elgg_get_filepath_cache()
+		{
+			global $CONFIG;
+			static $FILE_PATH_CACHE;
+			if (!$FILE_PATH_CACHE) $FILE_PATH_CACHE = new ElggFileCache($CONFIG->dataroot);
+			
+			return $FILE_PATH_CACHE;
+		}
+		
+		/**
 		 * Internal function for retrieving views used by elgg_view_tree
 		 *
 		 * @param unknown_type $dir
diff --git a/engine/lib/plugins.php b/engine/lib/plugins.php
index 937766e66..c70cd8ebc 100644
--- a/engine/lib/plugins.php
+++ b/engine/lib/plugins.php
@@ -210,10 +210,21 @@
 		 * @package Elgg

 		 * @subpackage Core

 		 */

-		function load_plugins() {

-

-			global $CONFIG;

-			if (!empty($CONFIG->pluginspath)) {

+		function load_plugins() {
+			

+			global $CONFIG;
+			
+			$cache = elgg_get_filepath_cache();
+			

+			if (!empty($CONFIG->pluginspath)) {
+				
+				// See if we have cached values for things
+				$cached_view_paths = $cache->load('view_paths');
+				if ($cached_view_paths) $CONFIG->views = unserialize($cached_view_paths);
+				
+				$cached_lang_paths = $cache->load('lang_paths');
+				if ($cached_lang_paths) $CONFIG->views = unserialize($cached_lang_paths);
+				
 				

 				// temporary disable all plugins if there is a file called 'disabled' in the plugin dir

 				if (file_exists($CONFIG->pluginspath . "disabled"))

@@ -221,28 +232,38 @@
 				

 				$plugins = get_plugin_list();

 				

-				if (sizeof($plugins))

+				if (sizeof($plugins))
+				{

 					foreach($plugins as $mod) {

 						if (is_plugin_enabled($mod)) {

 							if (file_exists($CONFIG->pluginspath . $mod)) {

 								if (!include($CONFIG->pluginspath . $mod . "/start.php"))

-									throw new PluginException(sprintf(elgg_echo('PluginException:MisconfiguredPlugin'), $mod));

-								if (is_dir($CONFIG->pluginspath . $mod . "/views")) {

-									if ($handle = opendir($CONFIG->pluginspath . $mod . "/views")) {

-										while ($viewtype = readdir($handle)) {

-											if (!in_array($viewtype,array('.','..','.svn','CVS')) && is_dir($CONFIG->pluginspath . $mod . "/views/" . $viewtype)) {

-												autoregister_views("",$CONFIG->pluginspath . $mod . "/views/" . $viewtype,$CONFIG->pluginspath . $mod . "/views/", $viewtype);

+									throw new PluginException(sprintf(elgg_echo('PluginException:MisconfiguredPlugin'), $mod));
+									
+								if (!$cached_view_paths)
+								{

+									if (is_dir($CONFIG->pluginspath . $mod . "/views")) {

+										if ($handle = opendir($CONFIG->pluginspath . $mod . "/views")) {

+											while ($viewtype = readdir($handle)) {

+												if (!in_array($viewtype,array('.','..','.svn','CVS')) && is_dir($CONFIG->pluginspath . $mod . "/views/" . $viewtype)) {

+													autoregister_views("",$CONFIG->pluginspath . $mod . "/views/" . $viewtype,$CONFIG->pluginspath . $mod . "/views/", $viewtype);

+												}

 											}

 										}

-									}

-								}

+									}
+								}
+								

 								if (is_dir($CONFIG->pluginspath . $mod . "/languages")) {

 									register_translations($CONFIG->pluginspath . $mod . "/languages/");

 								}

 							}

 						}

 					}

-				

+				}
+
+				// Cache results
+				if (!$cached_view_paths)
+					$cache->save('view_paths', serialize($CONFIG->views));
 			}

 			

 		}