<?php
-# Cache for article titles (prefixed DB keys) and ids linked from one source
-
+/**
+ * Cache for article titles (prefixed DB keys) and ids linked from one source
+ * @package MediaWiki
+ * @subpackage Cache
+ */
+
+/**
+ *
+ */
# These are used in incrementalSetup()
define ('LINKCACHE_GOOD', 0);
define ('LINKCACHE_BAD', 1);
define ('LINKCACHE_IMAGE', 2);
+define ('LINKCACHE_PAGE', 3);
+/**
+ * @package MediaWiki
+ * @subpackage Cache
+ */
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 $mPageLinks;
/* private */ var $mGoodLinks, $mBadLinks, $mActive;
/* private */ var $mImageLinks, $mCategoryLinks;
/* private */ var $mPreFilled, $mOldGoodLinks, $mOldBadLinks;
-
+ /* private */ var $mForUpdate;
+
/* private */ function getKey( $title ) {
global $wgDBname;
- return "$wgDBname:lc:title:$title";
+ return $wgDBname.':lc:title:'.$title;
}
- function LinkCache()
- {
+ function LinkCache() {
$this->mActive = true;
$this->mPreFilled = false;
+ $this->mForUpdate = false;
+ $this->mPageLinks = array();
$this->mGoodLinks = array();
$this->mBadLinks = array();
$this->mImageLinks = array();
$this->mOldBadLinks = array();
}
- function getGoodLinkID( $title )
- {
+ /**
+ * General accessor to get/set whether SELECT FOR UPDATE should be used
+ */
+ function forUpdate( $update = NULL ) {
+ return wfSetVar( $this->mForUpdate, $update );
+ }
+
+ function getGoodLinkID( $title ) {
if ( array_key_exists( $title, $this->mGoodLinks ) ) {
return $this->mGoodLinks[$title];
} else {
}
}
- function isBadLink( $title )
- {
+ function isBadLink( $title ) {
return array_key_exists( $title, $this->mBadLinks );
}
- function addGoodLink( $id, $title )
- {
+ function addGoodLinkObj( $id, $title ) {
if ( $this->mActive ) {
- $this->mGoodLinks[$title] = $id;
+ $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->mActive && ( ! $this->isBadLink( $dbkey ) ) ) {
+ $this->mBadLinks[$dbkey] = 1;
+ $this->mPageLinks[$dbkey] = $title;
}
}
- function addImageLink( $title )
- {
+ function addImageLink( $title ) {
if ( $this->mActive ) { $this->mImageLinks[$title] = 1; }
}
- function addImageLinkObj( $nt )
- {
+ function addImageLinkObj( $nt ) {
if ( $this->mActive ) { $this->mImageLinks[$nt->getDBkey()] = 1; }
}
$this->addCategoryLink( $nt->getDBkey(), $sortkey );
}
- function clearBadLink( $title )
- {
+ function clearBadLink( $title ) {
unset( $this->mBadLinks[$title] );
$this->clearLink( $title );
}
- function 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; }
- function addLink( $title )
- {
+ function addLink( $title ) {
$nt = Title::newFromDBkey( $title );
if( $nt ) {
return $this->addLinkObj( $nt );
}
}
- function addLinkObj( &$nt )
- {
- global $wgMemc, $wgLinkCacheMemcached;
+ function addLinkObj( &$nt ) {
+ global $wgMemc, $wgLinkCacheMemcached, $wgAntiLockFlags;
$title = $nt->getPrefixedDBkey();
if ( $this->isBadLink( $title ) ) { return 0; }
$id = $this->getGoodLinkID( $title );
if ( 0 != $id ) { return $id; }
- $fname = "LinkCache::addLinkObj";
+ $fname = 'LinkCache::addLinkObj';
wfProfileIn( $fname );
$ns = $nt->getNamespace();
$t = $nt->getDBkey();
- if ( "" == $title ) {
+ if ( '' == $title ) {
wfProfileOut( $fname );
return 0;
}
if( $wgLinkCacheMemcached )
$id = $wgMemc->get( $key = $this->getKey( $title ) );
if( ! is_integer( $id ) ) {
- $dbr =& wfGetDB( DB_READ );
- $id = $dbr->getField( 'cur', 'cur_id', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
+ if ( $this->mForUpdate ) {
+ $db =& wfGetDB( DB_MASTER );
+ if ( !( $wgAntiLockFlags & ALF_NO_LINK_LOCK ) ) {
+ $options = array( 'FOR UPDATE' );
+ }
+ } else {
+ $db =& wfGetDB( DB_SLAVE );
+ $options = array();
+ }
+
+ $id = $db->selectField( 'page', 'page_id', array( 'page_namespace' => $ns, 'page_title' => $t ), $fname, $options );
if ( !$id ) {
$id = 0;
}
$wgMemc->add( $key, $id, 3600*24 );
}
- if ( 0 == $id ) { $this->addBadLink( $title ); }
- else { $this->addGoodLink( $id, $title ); }
+ if( 0 == $id ) {
+ $this->addBadLinkObj( $nt );
+ } else {
+ $this->addGoodLinkObj( $id, $nt );
+ }
wfProfileOut( $fname );
return $id;
}
- function preFill( &$fromtitle )
- {
+ /**
+ * Bulk-check the pagelinks and page arrays for existence info.
+ * @param Title $fromtitle
+ */
+ function preFill( &$fromtitle ) {
global $wgEnablePersistentLC;
- $fname = "LinkCache::preFill";
+ $fname = 'LinkCache::preFill';
wfProfileIn( $fname );
- # Note -- $fromtitle is a Title *object*
$this->suspend();
$id = $fromtitle->getArticleID();
return;
}
}
-
- $dbr =& wfGetDB( DB_READ );
- $cur = $dbr->tableName( 'cur' );
- $links = $dbr->tableName( 'links' );
-
- $sql = "SELECT cur_id,cur_namespace,cur_title
- FROM $cur,$links
- WHERE cur_id=l_to AND l_from=$id";
- $res = $dbr->query( $sql, $fname );
- while( $s = $dbr->fetchObject( $res ) ) {
- $this->addGoodLink( $s->cur_id,
- Title::makeName( $s->cur_namespace, $s->cur_title )
- );
+ if ( $this->mForUpdate ) {
+ $db =& wfGetDB( DB_MASTER );
+ $options = 'FOR UPDATE';
+ } else {
+ $db =& wfGetDB( DB_SLAVE );
+ $options = '';
}
-
- $res = $dbr->select( 'brokenlinks', array( 'bl_to' ), array( 'bl_from' => $id ), $fname );
- while( $s = wfFetchObject( $res ) ) {
- $this->addBadLink( $s->bl_to );
+
+ $page = $db->tableName( 'page' );
+ $pagelinks = $db->tableName( 'pagelinks' );
+
+ $sql = "SELECT page_id,pl_namespace,pl_title
+ FROM $pagelinks
+ LEFT JOIN $page
+ ON pl_namespace=page_namespace AND pl_title=page_title
+ WHERE pl_from=$id $options";
+ $res = $db->query( $sql, $fname );
+ while( $s = $db->fetchObject( $res ) ) {
+ $title = Title::makeTitle( $s->pl_namespace, $s->pl_title );
+ if( $s->page_id ) {
+ $this->addGoodLinkObj( $s->page_id, $title );
+ } else {
+ $this->addBadLinkObj( $title );
+ }
}
-
- $this->mOldBadLinks = $this->mBadLinks;
+ $this->mOldPageLinks = $this->mPageLinks;
+ $this->mOldBadLinks = $this->mBadLinks;
$this->mOldGoodLinks = $this->mGoodLinks;
$this->mPreFilled = true;
wfProfileOut( $fname );
}
- function getGoodAdditions()
- {
+ function getGoodAdditions() {
return array_diff( $this->mGoodLinks, $this->mOldGoodLinks );
}
- function getBadAdditions()
- {
+ 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()
- {
+ function getImageAdditions() {
return array_diff_assoc( $this->mImageLinks, $this->mOldImageLinks );
}
- function getGoodDeletions()
- {
+ function getGoodDeletions() {
return array_diff( $this->mOldGoodLinks, $this->mGoodLinks );
}
- function getBadDeletions()
- {
+ function getBadDeletions() {
return array_values( array_diff( array_keys( $this->mOldBadLinks ), array_keys( $this->mBadLinks ) ));
}
- function getImageDeletions()
- {
+ function getImageDeletions() {
return array_diff_assoc( $this->mOldImageLinks, $this->mImageLinks );
}
+
+ function getPageAdditions() {
+ $set = array_diff( array_keys( $this->mPageLinks ), array_keys( $this->mOldPageLinks ) );
+ $out = array();
+ foreach( $set as $key ) {
+ $out[$key] = $this->mPageLinks[$key];
+ }
+ return $out;
+ }
+
+ function getPageDeletions() {
+ $set = array_diff( array_keys( $this->mOldPageLinks ), array_keys( $this->mPageLinks ) );
+ $out = array();
+ foreach( $set as $key ) {
+ $out[$key] = $this->mOldPageLinks[$key];
+ }
+ return $out;
+ }
- # Parameters: $which is one of the LINKCACHE_xxx constants, $del and $add are
- # the incremental update arrays which will be filled. 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 )
- {
+ /**
+ * 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;
}
$del = $this->getBadDeletions();
$add = $this->getBadAdditions();
break;
+ case LINKCACHE_PAGE:
+ $old =& $this->mOldPageLinks;
+ $cur =& $this->mPageLinks;
+ $del = $this->getPageDeletions();
+ $add = $this->getPageAdditions();
+ break;
default: # LINKCACHE_IMAGE
return false;
}
return true;
}
- # Clears cache but leaves old preFill copies alone
- function clear()
- {
+ /**
+ * Clears cache but leaves old preFill copies alone
+ */
+ function clear() {
+ $this->mPageLinks = array();
$this->mGoodLinks = array();
$this->mBadLinks = array();
$this->mImageLinks = array();
}
- /* private */ function fillFromLinkscc( $id ){
+ /**
+ * @access private
+ */
+ function fillFromLinkscc( $id ){
+ $fname = 'LinkCache::fillFromLinkscc';
+
$id = IntVal( $id );
- $dbr =& wfGetDB( DB_READ );
- $raw = $dbr->getField( 'linkscc', 'lcc_cacheobj', array( 'lcc_pageid' => $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" ) )
+ if( function_exists( 'gzuncompress' ) )
$cacheobj = @gzuncompress( $raw );
if($cacheobj == FALSE){
}
$cc = @unserialize( $cacheobj );
if( isset( $cc->mClassVer ) and ($cc->mClassVer == $this->mClassVer ) ){
+ $this->mOldPageLinks = $this->mPageLinks = $cc->mPageLinks;
$this->mOldGoodLinks = $this->mGoodLinks = $cc->mGoodLinks;
$this->mOldBadLinks = $this->mBadLinks = $cc->mBadLinks;
$this->mPreFilled = true;
}
- /* private */ function saveToLinkscc( $pid ){
+ /**
+ * @access private
+ */
+ function saveToLinkscc( $pid ){
global $wgCompressedPersistentLC;
- if( $wgCompressedPersistentLC and function_exists( "gzcompress" ) ) {
+ if( $wgCompressedPersistentLC and function_exists( 'gzcompress' ) ) {
$ser = gzcompress( serialize( $this ), 3 );
} else {
$ser = serialize( $this );
}
- $db =& wfGetDB( DB_WRITE );
+ $db =& wfGetDB( DB_MASTER );
$db->replace( 'linkscc', array( 'lcc_pageid' ), array( 'lcc_pageid' => $pid, 'lcc_cacheobj' => $ser ) );
}
- # Delete linkscc rows which link to here
- # $pid is a page id
- /* static */ function linksccClearLinksTo( $pid ){
+ /**
+ * Delete linkscc rows which link to here
+ * @param $title The page linked to
+ * @static
+ */
+ function linksccClearLinksTo( $title ){
global $wgEnablePersistentLC;
if ( $wgEnablePersistentLC ) {
- $fname = "LinkCache::linksccClearLinksTo";
+ $fname = 'LinkCache::linksccClearLinksTo';
$pid = intval( $pid );
- $dbw =& wfGetDB( DB_WRITE );
+ $dbw =& wfGetDB( DB_MASTER );
# Delete linkscc rows which link to here
- $dbw->deleteJoin( 'linkscc', 'links', 'lcc_pageid', 'l_from', array( 'l_to' => $pid ), $fname );
+ $dbw->deleteJoin( 'linkscc', 'pagelinks', 'lcc_pageid', 'pl_from',
+ array(
+ 'pl_namespace' => $title->getNamespace(),
+ 'pl-title' => $title->getDbKey() ),
+ $fname );
# Delete linkscc row representing this page
$dbw->delete( 'linkscc', array( 'lcc_pageid' => $pid ), $fname);
}
}
- # Delete linkscc rows with broken links to here
- # $title is a prefixed db title, for example like Title->getPrefixedDBkey() returns.
- /* static */ function linksccClearBrokenLinksTo( $title ){
+ /**
+ * @param $pid is a page id
+ * @static
+ */
+ function linksccClearPage( $pid ){
global $wgEnablePersistentLC;
- $fname = 'LinkCache::linksccClearBrokenLinksTo';
-
if ( $wgEnablePersistentLC ) {
- $dbw =& wfGetDB( DB_WRITE );
- $dbw->deleteJoin( 'linkscc', 'brokenlinks', 'lcc_pageid', 'bl_from', array( 'bl_to' => $title ), $fname );
+ $pid = intval( $pid );
+ $dbw =& wfGetDB( DB_MASTER );
+ $dbw->delete( 'linkscc', array( 'lcc_pageid' => $pid ) );
}
}
+}
- # $pid is a page id
- /* static */ function linksccClearPage( $pid ){
- global $wgEnablePersistentLC;
- if ( $wgEnablePersistentLC ) {
- $pid = intval( $pid );
- $dbw =& wfGetDB( DB_WRITE );
- $dbw->delete( 'linkscc', array( 'lcc_pageid' => $pid ) );
+/**
+ * Class representing a list of titles
+ * The execute() method checks them all for existence and adds them to a LinkCache object
+ +
+ * @package MediaWikki
+ * @subpackage Cache
+ */
+class LinkBatch {
+ /**
+ * 2-d array, first index namespace, second index dbkey, value arbitrary
+ */
+ var $data = array();
+
+ function LinkBatch( $arr = array() ) {
+ foreach( $arr as $item ) {
+ $this->addObj( $item );
}
}
+
+ function addObj( $title ) {
+ $this->add( $title->getNamespace(), $title->getDBkey() );
+ }
+
+ function add( $ns, $dbkey ) {
+ if ( $ns < 0 ) {
+ return;
+ }
+ if ( !array_key_exists( $ns, $this->data ) ) {
+ $this->data[$ns] = array();
+ }
+
+ $this->data[$ns][$dbkey] = 1;
+ }
+
+ function execute( &$cache ) {
+ $fname = 'LinkBatch::execute';
+ $namespaces = array();
+
+ if ( !count( $this->data ) ) {
+ return;
+ }
+
+ wfProfileIn( $fname );
+
+ // Construct query
+ // This is very similar to Parser::replaceLinkHolders
+ $dbr = wfGetDB( DB_SLAVE );
+ $page = $dbr->tableName( 'page' );
+ $sql = "SELECT page_id, page_namespace, page_title FROM $page WHERE "
+ . $this->constructSet( 'page', $dbr );
+
+ // Do query
+ $res = $dbr->query( $sql, $fname );
+
+ // Process results
+ // For each returned entry, add it to the list of good links, and remove it from $remaining
+
+ $remaining = $this->data;
+ while ( $row = $dbr->fetchObject( $res ) ) {
+ $title = Title::makeTitle( $row->page_namespace, $row->page_title );
+ $cache->addGoodLinkObj( $row->page_id, $title );
+ unset( $remaining[$row->page_namespace][$row->page_title] );
+ }
+ $dbr->freeResult( $res );
+
+ // The remaining links in $data are bad links, register them as such
+ foreach ( $remaining as $ns => $dbkeys ) {
+ foreach ( $dbkeys as $dbkey => $nothing ) {
+ $title = Title::makeTitle( $ns, $dbkey );
+ $cache->addBadLinkObj( $title );
+ }
+ }
+
+ wfProfileOut( $fname );
+ }
+
+ /**
+ * Construct a WHERE clause which will match all the given titles.
+ * Give the appropriate table's field name prefix ('page', 'pl', etc).
+ *
+ * @param string $prefix
+ * @return string
+ * @access public
+ */
+ function constructSet( $prefix, $db ) {
+ $first = true;
+ $sql = '';
+ foreach ( $this->data as $ns => $dbkeys ) {
+ if ( !count( $dbkeys ) ) {
+ continue;
+ }
+
+ if ( $first ) {
+ $first = false;
+ } else {
+ $sql .= ' OR ';
+ }
+ $sql .= "({$prefix}_namespace=$ns AND {$prefix}_title IN (";
+
+ $firstTitle = true;
+ foreach( $dbkeys as $dbkey => $nothing ) {
+ if ( $firstTitle ) {
+ $firstTitle = false;
+ } else {
+ $sql .= ',';
+ }
+ $sql .= $db->addQuotes( $dbkey );
+ }
+
+ $sql .= '))';
+ }
+ return $sql;
+ }
}
+
?>
dépôts / lhc / web / wiklou.git / blobdiff