From c5b7002917ecfebd66d7a8f50ebb48699a279b85 Mon Sep 17 00:00:00 2001
From: Domas Mituzas <midom@users.mediawiki.org>
Date: Mon, 4 Oct 2004 20:36:11 +0000
Subject: [PATCH] initial support for partial message cache, the way to have
 separated message cache objects by scope and/or severity, though by leaving
 rarely used messages standalone on db and/or cached daemons...

---
 includes/DefaultSettings.php   |  3 +--
 includes/MessageCache.php      | 20 ++++++++++++++------
 includes/MessageCacheHints.php | 16 ++++++++++++++++
 3 files changed, 31 insertions(+), 8 deletions(-)
 create mode 100644 includes/MessageCacheHints.php

diff --git a/includes/DefaultSettings.php b/includes/DefaultSettings.php
index ea89a14488..f22f41b431 100644
--- a/includes/DefaultSettings.php
+++ b/includes/DefaultSettings.php
@@ -301,8 +301,7 @@ $wgTranslateNumerals = true; # For Hindi and Arabic use local numerals instead
 # Interface messages will be get from the database.
 $wgUseDatabaseMessages = true;
 $wgMsgCacheExpiry	= 86400;
-
-
+$wgPartialMessageCache = false;
 # Miscellaneous configuration settings
 #
 
diff --git a/includes/MessageCache.php b/includes/MessageCache.php
index e5a89e9453..fd6ae56500 100755
--- a/includes/MessageCache.php
+++ b/includes/MessageCache.php
@@ -117,16 +117,24 @@ class MessageCache
 	}
 
 	/**
-	 * Loads all cacheable messages from the database
+	 * Loads all or main part of cacheable messages from the database
 	 */
 	function loadFromDB() {
-			$fname = 'MessageCache::loadFromDB';
+		global $wgPartialMessageCache;
+		$fname = 'MessageCache::loadFromDB';
 		$dbr =& wfGetDB( DB_SLAVE );
+		$conditions = array( 'cur_is_redirect' => 0, 
+					'cur_namespace' => NS_MEDIAWIKI);
+		if ($wgPartialMessageCache) {
+			if (is_array($wgPartialMessageCache)) {
+				$conditions['cur_title']=$wgPartialMessageCache;
+			} else {
+				require_once("MessageCacheHints.php");
+				$conditions['cur_title']=MessageCacheHints::get();
+			}
+		}
 		$res = $dbr->select( 'cur',
-			array( 'cur_title', 'cur_text' ),
-			array( 'cur_is_redirect' => 0, 'cur_namespace' => NS_MEDIAWIKI ),
-			$fname
-		);
+			array( 'cur_title', 'cur_text' ), $conditions, $fname);
 
 		$this->mCache = array();
 		for ( $row = $dbr->fetchObject( $res ); $row; $row = $dbr->fetchObject( $res ) ) {
diff --git a/includes/MessageCacheHints.php b/includes/MessageCacheHints.php
new file mode 100644
index 0000000000..d84e247bee
--- /dev/null
+++ b/includes/MessageCacheHints.php
@@ -0,0 +1,16 @@
+<?
+
+/* 
+ *	@package Mediawiki
+ *	@version $Id$
+ *
+ *	This class should provide methods for message 
+ *	cache key hints for various scopes */
+
+class MessageCacheHints {
+	function get($scope="global") {
+		return array('TODO');
+	}
+}
+
+?>
-- 
2.20.1