X-Git-Url: https://git.heureux-cyclage.org/?a=blobdiff_plain;f=includes%2FLinkCache.php;h=7c49d88e21a9d4e71105b0d73ecc29d49c56eb0e;hb=e715f5358a2efc9ffe1086355b32de615aae09ce;hp=967ba8512c40a6d3a25db615ed037c5277f2d545;hpb=949ef6a74438821b1355b6d8928ff6b1d3716b74;p=lhc%2Fweb%2Fwiklou.git

diff --git a/includes/LinkCache.php b/includes/LinkCache.php
index 967ba8512c..7c49d88e21 100644
--- a/includes/LinkCache.php
+++ b/includes/LinkCache.php
@@ -1,55 +1,47 @@
 <?php
 /**
  * Cache for article titles (prefixed DB keys) and ids linked from one source
- * @package MediaWiki
+ * 
+ * @addtogroup Cache
  */
-
-/**
- *
- */
-# These are used in incrementalSetup()
-define ('LINKCACHE_GOOD', 0);
-define ('LINKCACHE_BAD', 1);
-define ('LINKCACHE_IMAGE', 2);
-
-/**
- *
- * @package MediaWiki
- */
-class LinkCache {	
+class LinkCache {
 	// Increment $mClassVer whenever old serialized versions of this class
 	// becomes incompatible with the new version.
-	/* private */ var $mClassVer = 2;
+	/* private */ var $mClassVer = 3;
 
-	/* private */ var $mGoodLinks, $mBadLinks, $mActive;
-	/* private */ var $mImageLinks, $mCategoryLinks;
-	/* private */ var $mPreFilled, $mOldGoodLinks, $mOldBadLinks;
+	/* private */ var $mPageLinks;
+	/* private */ var $mGoodLinks, $mBadLinks;
 	/* private */ var $mForUpdate;
 
-	/* private */ function getKey( $title ) {
-		global $wgDBname;
-		return $wgDBname.':lc:title:'.$title;
+	/**
+	 * Get an instance of this class
+	 */
+	static function &singleton() {
+		static $instance;
+		if ( !isset( $instance ) ) {
+			$instance = new LinkCache;
+		}
+		return $instance;
 	}
-	
-	function LinkCache() {
-		$this->mActive = true;
-		$this->mPreFilled = false;
+
+	function __construct() {
 		$this->mForUpdate = false;
+		$this->mPageLinks = array();
 		$this->mGoodLinks = array();
 		$this->mBadLinks = array();
-		$this->mImageLinks = array();
-		$this->mCategoryLinks = array();
-		$this->mOldGoodLinks = array();
-		$this->mOldBadLinks = array();
+	}
+
+	/* private */ function getKey( $title ) {
+		return wfMemcKey( 'lc', 'title', $title );
 	}
 
 	/**
 	 * General accessor to get/set whether SELECT FOR UPDATE should be used
 	 */
-	function forUpdate( $update = NULL ) { 
+	function forUpdate( $update = NULL ) {
 		return wfSetVar( $this->mForUpdate, $update );
 	}
-	
+
 	function getGoodLinkID( $title ) {
 		if ( array_key_exists( $title, $this->mGoodLinks ) ) {
 			return $this->mGoodLinks[$title];
@@ -59,59 +51,43 @@ class LinkCache {
 	}
 
 	function isBadLink( $title ) {
-		return array_key_exists( $title, $this->mBadLinks ); 
+		return array_key_exists( $title, $this->mBadLinks );
 	}
 
-	function addGoodLink( $id, $title ) {
-		if ( $this->mActive ) {
-			$this->mGoodLinks[$title] = $id;
-		}
+	function addGoodLinkObj( $id, $title ) {
+		$dbkey = $title->getPrefixedDbKey();
+		$this->mGoodLinks[$dbkey] = $id;
+		$this->mPageLinks[$dbkey] = $title;
 	}
 
-	function addBadLink( $title ) {
-		if ( $this->mActive && ( ! $this->isBadLink( $title ) ) ) {
-			$this->mBadLinks[$title] = 1;
+	function addBadLinkObj( $title ) {
+		$dbkey = $title->getPrefixedDbKey();
+		if ( ! $this->isBadLink( $dbkey ) ) {
+			$this->mBadLinks[$dbkey] = 1;
+			$this->mPageLinks[$dbkey] = $title;
 		}
 	}
-	
-	function addBadLinkObj( &$nt ) {
-		$this->addBadLink( $nt->getPrefixedDBkey() );
-	}
-
-	function addImageLink( $title ) {
-		if ( $this->mActive ) { $this->mImageLinks[$title] = 1; }
-	}
-
-	function addImageLinkObj( $nt ) {
-		if ( $this->mActive ) { $this->mImageLinks[$nt->getDBkey()] = 1; }
-	}
-	
-	function addCategoryLink( $title, $sortkey ) {
-		if ( $this->mActive ) { $this->mCategoryLinks[$title] = $sortkey; }
-	}
-	
-	function addCategoryLinkObj( &$nt, $sortkey ) {
-		$this->addCategoryLink( $nt->getDBkey(), $sortkey );
-	}
 
 	function clearBadLink( $title ) {
 		unset( $this->mBadLinks[$title] );
 		$this->clearLink( $title );
 	}
-	
+
 	function clearLink( $title ) {
 		global $wgMemc, $wgLinkCacheMemcached;
 		if( $wgLinkCacheMemcached )
 			$wgMemc->delete( $this->getKey( $title ) );
 	}
 
-	function suspend() { $this->mActive = false; }
-	function resume() { $this->mActive = true; }
+	function getPageLinks() { return $this->mPageLinks; }
 	function getGoodLinks() { return $this->mGoodLinks; }
 	function getBadLinks() { return array_keys( $this->mBadLinks ); }
-	function getImageLinks() { return $this->mImageLinks; }
-	function getCategoryLinks() { return $this->mCategoryLinks; }
 
+	/**
+	 * Add a title to the link cache, return the page_id or zero if non-existent
+	 * @param $title String: title to add
+	 * @return integer
+	 */
 	function addLink( $title ) {
 		$nt = Title::newFromDBkey( $title );
 		if( $nt ) {
@@ -120,277 +96,77 @@ class LinkCache {
 			return 0;
 		}
 	}
-	
+
+	/**
+	 * Add a title to the link cache, return the page_id or zero if non-existent
+	 * @param $nt Title to add.
+	 * @return integer
+	 */
 	function addLinkObj( &$nt ) {
-		global $wgMemc, $wgLinkCacheMemcached;
+		global $wgMemc, $wgLinkCacheMemcached, $wgAntiLockFlags;
 		$title = $nt->getPrefixedDBkey();
-		if ( $this->isBadLink( $title ) ) { return 0; }		
+		if ( $this->isBadLink( $title ) ) { return 0; }
 		$id = $this->getGoodLinkID( $title );
 		if ( 0 != $id ) { return $id; }
 
 		$fname = 'LinkCache::addLinkObj';
+		global $wgProfiling, $wgProfiler;
+		if ( $wgProfiling && isset( $wgProfiler ) ) {
+			$fname .= ' (' . $wgProfiler->getCurrentSection() . ')';
+		}
+
 		wfProfileIn( $fname );
 
 		$ns = $nt->getNamespace();
 		$t = $nt->getDBkey();
 
-		if ( '' == $title ) { 
+		if ( '' == $title ) {
 			wfProfileOut( $fname );
-			return 0; 
+			return 0;
 		}
-		
+
 		$id = NULL;
 		if( $wgLinkCacheMemcached )
 			$id = $wgMemc->get( $key = $this->getKey( $title ) );
 		if( ! is_integer( $id ) ) {
 			if ( $this->mForUpdate ) {
-				$db =& wfGetDB( DB_MASTER );
-				$options = array( 'FOR UPDATE' );
+				$db = wfGetDB( DB_MASTER );
+				if ( !( $wgAntiLockFlags & ALF_NO_LINK_LOCK ) ) {
+					$options = array( 'FOR UPDATE' );
+				} else {
+					$options = array();
+				}
 			} else {
-				$db =& wfGetDB( DB_SLAVE );
+				$db = wfGetDB( DB_SLAVE );
 				$options = array();
 			}
 
-			$id = $db->selectField( 'cur', 'cur_id', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname, $options );
+			$id = $db->selectField( 'page', 'page_id',
+					array( 'page_namespace' => $ns, 'page_title' => $t ),
+					$fname, $options );
 			if ( !$id ) {
 				$id = 0;
 			}
 			if( $wgLinkCacheMemcached )
 				$wgMemc->add( $key, $id, 3600*24 );
 		}
-		
-		if ( 0 == $id ) { $this->addBadLink( $title ); }
-		else { $this->addGoodLink( $id, $title ); }
-		wfProfileOut( $fname );
-		return $id;
-	}
-
-	function preFill( &$fromtitle ) {
-		global $wgEnablePersistentLC;
 
-		$fname = 'LinkCache::preFill';
-		wfProfileIn( $fname );
-		# Note -- $fromtitle is a Title *object*
-
-		$this->suspend();
-		$id = $fromtitle->getArticleID();
-		$this->resume();
-		
-		if( $id == 0 ) {
-			wfDebug( "$fname - got id 0 for title '" . $fromtitle->getPrefixedDBkey() . "'\n" );
-			wfProfileOut( $fname );
-			return;
-		}
-		
-		if ( $wgEnablePersistentLC ) {
-			if( $this->fillFromLinkscc( $id ) ){
-				wfProfileOut( $fname );
-				return;
-			}
-		}
-		if ( $this->mForUpdate ) {
-			$db =& wfGetDB( DB_MASTER );
-			$options = 'FOR UPDATE';
+		if( 0 == $id ) {
+			$this->addBadLinkObj( $nt );
 		} else {
-			$db =& wfGetDB( DB_SLAVE );
-			$options = '';
-		}
-
-		$cur = $db->tableName( 'cur' );
-		$links = $db->tableName( 'links' );
-
-		$sql = "SELECT cur_id,cur_namespace,cur_title
-			FROM $cur,$links
-			WHERE cur_id=l_to AND l_from=$id $options";
-		$res = $db->query( $sql, $fname );
-		while( $s = $db->fetchObject( $res ) ) {
-			$this->addGoodLink( $s->cur_id,
-				Title::makeName( $s->cur_namespace, $s->cur_title )
-				);
-		}
-		
-		$res = $db->select( 'brokenlinks', array( 'bl_to' ), array( 'bl_from' => $id ), $fname, array( $options ) );
-		while( $s = $db->fetchObject( $res ) ) {
-			$this->addBadLink( $s->bl_to );
-		}
-		
-		$this->mOldBadLinks = $this->mBadLinks;
-		$this->mOldGoodLinks = $this->mGoodLinks;
-		$this->mPreFilled = true;
-
-		if ( $wgEnablePersistentLC ) {
-			$this->saveToLinkscc( $id );
+			$this->addGoodLinkObj( $id, $nt );
 		}
 		wfProfileOut( $fname );
-	}
-
-	function getGoodAdditions() {
-		return array_diff( $this->mGoodLinks, $this->mOldGoodLinks );
-	}
-
-	function getBadAdditions() {
-		#wfDebug( "mOldBadLinks: " . implode( ', ', array_keys( $this->mOldBadLinks ) ) . "\n" );
-		#wfDebug( "mBadLinks: " . implode( ', ', array_keys( $this->mBadLinks ) ) . "\n" );
-		return array_values( array_diff( array_keys( $this->mBadLinks ), array_keys( $this->mOldBadLinks ) ) );
-	}
-
-	function getImageAdditions() {
-		return array_diff_assoc( $this->mImageLinks, $this->mOldImageLinks );
-	}
-
-	function getGoodDeletions() {
-		return array_diff( $this->mOldGoodLinks, $this->mGoodLinks );
-	}
-
-	function getBadDeletions() {
-		return array_values( array_diff( array_keys( $this->mOldBadLinks ), array_keys( $this->mBadLinks ) ));
-	}
-
-	function getImageDeletions() {
-		return array_diff_assoc( $this->mOldImageLinks, $this->mImageLinks );
-	}
-
-	/**
-	 * Parameters:
-	 * @param $which is one of the LINKCACHE_xxx constants
-	 * @param $del,$add are the incremental update arrays which will be filled.
-	 *
-	 * @return Returns whether or not it's worth doing the incremental version.
-	 *
-	 * For example, if [[List of mathematical topics]] was blanked,
-	 * it would take a long, long time to do incrementally.
-	 */
-	function incrementalSetup( $which, &$del, &$add ) {
-		if ( ! $this->mPreFilled ) {
-			return false;
-		}
-
-		switch ( $which ) {
-			case LINKCACHE_GOOD:
-				$old =& $this->mOldGoodLinks;
-				$cur =& $this->mGoodLinks;
-				$del = $this->getGoodDeletions();
-				$add = $this->getGoodAdditions();
-				break;
-			case LINKCACHE_BAD:
-				$old =& $this->mOldBadLinks;
-				$cur =& $this->mBadLinks;
-				$del = $this->getBadDeletions();
-				$add = $this->getBadAdditions();
-				break;
-			default: # LINKCACHE_IMAGE
-				return false;		
-		}
-		
-		return true;
+		return $id;
 	}
 
 	/**
-	 * Clears cache but leaves old preFill copies alone
+	 * Clears cache
 	 */
 	function clear() {
+		$this->mPageLinks = array();
 		$this->mGoodLinks = array();
 		$this->mBadLinks = array();
-		$this->mImageLinks = array();
-	}
-
-	/**
-	 * @access private
-	 */
-	function fillFromLinkscc( $id ){ 
-		$fname = 'LinkCache::fillFromLinkscc';
-
-		$id = IntVal( $id );
-		if ( $this->mForUpdate ) {
-			$db =& wfGetDB( DB_MASTER );
-			$options = 'FOR UPDATE';
-		} else {
-			$db =& wfGetDB( DB_SLAVE );
-			$options = '';
-		}
-		$raw = $db->selectField( 'linkscc', 'lcc_cacheobj', array( 'lcc_pageid' => $id ), $fname, $options );
-		if ( $raw === false ) {
-			return false;
-		}
-		
-		$cacheobj = false;
-		if( function_exists( 'gzuncompress' ) )
-			$cacheobj = @gzuncompress( $raw );
-
-		if($cacheobj == FALSE){
-			$cacheobj = $raw;
-		}
-		$cc = @unserialize( $cacheobj );
-		if( isset( $cc->mClassVer ) and ($cc->mClassVer == $this->mClassVer ) ){
-			$this->mOldGoodLinks = $this->mGoodLinks = $cc->mGoodLinks;
-			$this->mOldBadLinks = $this->mBadLinks = $cc->mBadLinks;
-			$this->mPreFilled = true;
-			return TRUE;
-		} else {
-			return FALSE;
-		}
-
-	}
-
-	/**
-	 * @access private
-	 */
-	function saveToLinkscc( $pid ){
-		global $wgCompressedPersistentLC;
-		if( $wgCompressedPersistentLC and function_exists( 'gzcompress' ) ) {
-			$ser = gzcompress( serialize( $this ), 3 );
-		} else {
-			$ser = serialize( $this );
-		}
-		$db =& wfGetDB( DB_MASTER );
-		$db->replace( 'linkscc', array( 'lcc_pageid' ), array( 'lcc_pageid' => $pid, 'lcc_cacheobj' => $ser ) );
-	}
-
-	/**
-	 * Delete linkscc rows which link to here
-	 * @param $pid is a page id
-	 * @static
-	 */
-	function linksccClearLinksTo( $pid ){
-		global $wgEnablePersistentLC;
-		if ( $wgEnablePersistentLC ) {
-			$fname = 'LinkCache::linksccClearLinksTo';
-			$pid = intval( $pid );
-			$dbw =& wfGetDB( DB_MASTER );
-			# Delete linkscc rows which link to here
-			$dbw->deleteJoin( 'linkscc', 'links', 'lcc_pageid', 'l_from', array( 'l_to' => $pid ), $fname );
-			# Delete linkscc row representing this page
-			$dbw->delete( 'linkscc', array( 'lcc_pageid' => $pid ), $fname);
-		}
-
-	}
-
-	/**
-	 * Delete linkscc rows with broken links to here
-	 * @param $title is a prefixed db title for example like Title->getPrefixedDBkey() returns.
-	 * @static
-	 */
-	function linksccClearBrokenLinksTo( $title ){
-		global $wgEnablePersistentLC;
-		$fname = 'LinkCache::linksccClearBrokenLinksTo';
-
-		if ( $wgEnablePersistentLC ) {
-			$dbw =& wfGetDB( DB_MASTER );
-			$dbw->deleteJoin( 'linkscc', 'brokenlinks', 'lcc_pageid', 'bl_from', array( 'bl_to' => $title ), $fname );
-		}
-	}
-
-	/**
-	 * @param $pid is a page id
-	 * @static
-	 */
-	function linksccClearPage( $pid ){
-		global $wgEnablePersistentLC;
-		if ( $wgEnablePersistentLC ) {
-			$pid = intval( $pid );
-			$dbw =& wfGetDB( DB_MASTER );
-			$dbw->delete( 'linkscc', array( 'lcc_pageid' => $pid ) );
-		}
 	}
 }
-?>
+