From: Mr. E23 <e23@users.mediawiki.org>
Date: Sat, 8 Nov 2003 15:12:34 +0000 (+0000)
Subject: Experimental code for caching page links
X-Git-Tag: 1.1.0~187
X-Git-Url: http://git.cyclocoop.org/%24action?a=commitdiff_plain;h=665c30813eddfc959021b5c71772302611f10121;p=lhc%2Fweb%2Fwiklou.git

Experimental code for caching page links
---

diff --git a/includes/Article.php b/includes/Article.php
index 4c6d3b5c12..d7a8fd3d76 100644
--- a/includes/Article.php
+++ b/includes/Article.php
@@ -338,6 +338,11 @@ class Article {
 		$newid = wfInsertId();
 		$this->mTitle->resetArticleID( $newid );
 
+		// Purge related entries in links cache on new page, to heal broken links
+		$ptitle = wfStrencode( $ttl );
+		wfQuery("DELETE linkscc FROM linkscc,brokenlinks ".
+			"WHERE lcc_pageid=bl_from AND bl_to='{$ptitle}'", DB_WRITE);
+		
 		$sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 		  "rc_namespace,rc_title,rc_new,rc_minor,rc_cur_id,rc_user," .
 		  "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid,rc_bot) VALUES (" .
@@ -454,6 +459,13 @@ class Article {
 			$sql = "UPDATE recentchanges SET rc_cur_time='{$now}' " .
 			  "WHERE rc_cur_id=" . $this->getID();
 			wfQuery( $sql, DB_WRITE, $fname );
+			
+			// Purge related entries in link cache when a page change
+			// (probably just affects anything when article changes stub state)
+			$pageid=$this->getID();
+			wfQuery("DELETE linkscc FROM linkscc,links ".
+				"WHERE lcc_title=links.l_from AND l_to={$pageid}", DB_WRITE);
+
 		}
 		if( $wgDBtransactions ) {
 			$sql = "COMMIT";
@@ -830,6 +842,12 @@ class Article {
 		# Finally, clean up the link tables
 
 		if ( 0 != $id ) {
+
+                        // Purge related entries in links cache on delete,
+                        wfQuery("DELETE linkscc FROM linkscc,links ".
+                                "WHERE lcc_title=links.l_from AND l_to={$id}", DB_WRITE);
+                        wfQuery("DELETE FROM linkscc WHERE lcc_title='{$t}'", DB_WRITE);
+
 			$t = wfStrencode( $title->getPrefixedDBkey() );
 			$sql = "SELECT l_from FROM links WHERE l_to={$id}";
 			$res = wfQuery( $sql, DB_READ, $fname );
diff --git a/includes/LinkCache.php b/includes/LinkCache.php
index 99e1f2c691..23f5182c02 100644
--- a/includes/LinkCache.php
+++ b/includes/LinkCache.php
@@ -141,6 +141,22 @@ class LinkCache {
 		wfProfileIn( $fname );
 		# Note -- $fromtitle is a Title *object*
 		$dbkeyfrom = wfStrencode( $fromtitle->getPrefixedDBKey() );
+
+
+		$res = wfQuery("SELECT lcc_cacheobj FROM linkscc WHERE lcc_title = '{$dbkeyfrom}'", 
+		       	       DB_READ);
+		$row = wfFetchObject( $res );
+		if( $row != FALSE){
+		  $cacheobj = gzuncompress( $row->lcc_cacheobj );
+		  $cc = unserialize( $cacheobj );
+		  $this->mGoodLinks = $cc->mGoodLinks;
+		  $this->mBadLinks = $cc->mBadLinks;
+		  $this->mPreFilled = true;
+		  wfProfileOut( $fname );
+		  return;
+		} 
+
+
 		$sql = "SELECT cur_id,cur_namespace,cur_title
 			FROM cur,links
 			WHERE cur_id=l_to AND l_from='{$dbkeyfrom}'";
@@ -166,7 +182,12 @@ class LinkCache {
 		$this->mOldBadLinks = $this->mBadLinks;
 		$this->mOldGoodLinks = $this->mGoodLinks;
 		$this->mPreFilled = true;
-		
+
+		// put fetched link data into cache
+		$serCachegz = wfStrencode( gzcompress( serialize( $this ), 3) );
+		wfQuery("REPLACE INTO linkscc VALUES({$id}, '{$dbkeyfrom}', '{$serCachegz}')", 
+			DB_WRITE);
+
 		wfProfileOut( $fname );
 	}
 
diff --git a/includes/LinksUpdate.php b/includes/LinksUpdate.php
index 98bc427182..b87f2c46e1 100644
--- a/includes/LinksUpdate.php
+++ b/includes/LinksUpdate.php
@@ -12,6 +12,7 @@ class LinksUpdate {
 		$this->mTitleEnc = wfStrencode( $title );
 	}
 
+	
 	function doUpdate()
 	{
 		global $wgUseBetterLinksUpdate, $wgLinkCache, $wgDBtransactions;
@@ -19,6 +20,9 @@ class LinksUpdate {
 		/* Update link tables with outgoing links from an updated article */
 		/* Relies on the 'link cache' to be filled out */
 
+		// Make sure links cache is regenerated on next load
+		wfQuery("DELETE FROM linkscc WHERE lcc_title = '{$safeTitle}'", DB_WRITE);
+
 		if ( !$wgUseBetterLinksUpdate ) {
 			$this->doDumbUpdate();
 			return;