From 52b6fde352fd0282a8a3ddfc3f2ff218d97f7dbb Mon Sep 17 00:00:00 2001
From: marcus <marcus@36083f99-b078-4883-b0ff-0f9b5a30f544>
Date: Tue, 3 Mar 2009 11:18:09 +0000
Subject: 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
---
 engine/lib/elgglib.php | 15 +++++++++++++++
 engine/lib/plugins.php | 49 +++++++++++++++++++++++++++++++++++--------------
 2 files changed, 50 insertions(+), 14 deletions(-)

(limited to 'engine/lib')

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
@@ -495,6 +495,21 @@
 			}
 		}
 		
+		/**
+		 * 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
 		 *
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));
 			}
 			
 		}
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