From 4960bff13d90c8afd48077682bb0bbad49b85d6b Mon Sep 17 00:00:00 2001
From: Platonides <platonides@users.mediawiki.org>
Date: Thu, 12 Aug 2010 18:25:04 +0000
Subject: [PATCH] Make $wgExternalBlobCache a local static variable. Remove
 $wgExternalLoadBalancers, unused since r32578 (birth of LBFactory)

---
 includes/ExternalStoreDB.php | 35 +++++++++++------------------------
 1 file changed, 11 insertions(+), 24 deletions(-)

diff --git a/includes/ExternalStoreDB.php b/includes/ExternalStoreDB.php
index 769c64da0a..877277a280 100644
--- a/includes/ExternalStoreDB.php
+++ b/includes/ExternalStoreDB.php
@@ -1,25 +1,5 @@
 <?php
 
-/**
- * External database storage will use one (or more) separate connection pools
- * from what the main wiki uses. If we load many revisions, such as when doing
- * bulk backups or maintenance, we want to keep them around over the lifetime
- * of the script.
- *
- * Associative array of LoadBalancer objects, indexed by cluster name.
- */
-global $wgExternalLoadBalancers;
-$wgExternalLoadBalancers = array();
-
-/**
- * One-step cache variable to hold base blobs; operations that
- * pull multiple revisions may often pull multiple times from
- * the same blob. By keeping the last-used one open, we avoid
- * redundant unserialization and decompression overhead.
- */
-global $wgExternalBlobCache;
-$wgExternalBlobCache = array();
-
 /**
  * DB accessable external objects
  * @ingroup ExternalStorage
@@ -113,11 +93,18 @@ class ExternalStoreDB {
 	 * @private
 	 */
 	function &fetchBlob( $cluster, $id, $itemID ) {
-		global $wgExternalBlobCache;
+		/**
+		 * One-step cache variable to hold base blobs; operations that
+		 * pull multiple revisions may often pull multiple times from
+		 * the same blob. By keeping the last-used one open, we avoid
+		 * redundant unserialization and decompression overhead.
+		 */
+		static $externalBlobCache = array();
+
 		$cacheID = ( $itemID === false ) ? "$cluster/$id" : "$cluster/$id/";
-		if( isset( $wgExternalBlobCache[$cacheID] ) ) {
+		if( isset( $externalBlobCache[$cacheID] ) ) {
 			wfDebug( "ExternalStoreDB::fetchBlob cache hit on $cacheID\n" );
-			return $wgExternalBlobCache[$cacheID];
+			return $externalBlobCache[$cacheID];
 		}
 
 		wfDebug( "ExternalStoreDB::fetchBlob cache miss on $cacheID\n" );
@@ -138,7 +125,7 @@ class ExternalStoreDB {
 			$ret = unserialize( $ret );
 		}
 
-		$wgExternalBlobCache = array( $cacheID => &$ret );
+		$externalBlobCache = array( $cacheID => &$ret );
 		return $ret;
 	}
 
-- 
2.20.1