<?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);
+/**
+ *
+ * @package MediaWiki
+ */
class LinkCache {
// Increment $mClassVer whenever old serialized versions of this class
// becomes incompatible with the new version.
/* 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->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 addGoodLink( $id, $title ) {
if ( $this->mActive ) {
$this->mGoodLinks[$title] = $id;
}
}
- function addBadLink( $title )
- {
+ function addBadLink( $title ) {
if ( $this->mActive && ( ! $this->isBadLink( $title ) ) ) {
$this->mBadLinks[$title] = 1;
}
}
- 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 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 )
- {
+ function addLinkObj( &$nt ) {
global $wgMemc, $wgLinkCacheMemcached;
$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 ) ) {
- $sql = "SELECT cur_id FROM cur WHERE cur_namespace=" .
- "{$ns} AND cur_title='" . wfStrencode( $t ) . "'";
- $res = wfQuery( $sql, DB_READ, "LinkCache::addLink" );
+ if ( $this->mForUpdate ) {
+ $db =& wfGetDB( DB_MASTER );
+ $options = array( 'FOR UPDATE' );
+ } else {
+ $db =& wfGetDB( DB_SLAVE );
+ $options = array();
+ }
- if ( 0 == wfNumRows( $res ) ) {
+ $id = $db->selectField( 'page', 'page_id', array( 'page_namespace' => $ns, 'page_title' => $t ), $fname, $options );
+ if ( !$id ) {
$id = 0;
- } else {
- $s = wfFetchObject( $res );
- $id = $s->cur_id;
}
if( $wgLinkCacheMemcached )
$wgMemc->add( $key, $id, 3600*24 );
return $id;
}
- function preFill( &$fromtitle )
- {
+ function preFill( &$fromtitle ) {
global $wgEnablePersistentLC;
- $fname = "LinkCache::preFill";
+ $fname = 'LinkCache::preFill';
wfProfileIn( $fname );
# Note -- $fromtitle is a Title *object*
return;
}
}
+ if ( $this->mForUpdate ) {
+ $db =& wfGetDB( DB_MASTER );
+ $options = 'FOR UPDATE';
+ } else {
+ $db =& wfGetDB( DB_SLAVE );
+ $options = '';
+ }
- $sql = "SELECT cur_id,cur_namespace,cur_title
- FROM cur,links
- WHERE cur_id=l_to AND l_from=$id";
- $res = wfQuery( $sql, DB_READ, $fname );
- while( $s = wfFetchObject( $res ) ) {
- $this->addGoodLink( $s->cur_id,
- Title::makeName( $s->cur_namespace, $s->cur_title )
+ $page = $db->tableName( 'page' );
+ $links = $db->tableName( 'links' );
+
+ $sql = "SELECT page_id,page_namespace,page_title
+ FROM $page,$links
+ WHERE page_id=l_to AND l_from=$id $options";
+ $res = $db->query( $sql, $fname );
+ while( $s = $db->fetchObject( $res ) ) {
+ $this->addGoodLink( $s->page_id,
+ Title::makeName( $s->page_namespace, $s->page_title )
);
}
- $sql = "SELECT bl_to
- FROM brokenlinks
- WHERE bl_from='{$id}'";
- $res = wfQuery( $sql, DB_READ, "LinkCache::preFill" );
- while( $s = wfFetchObject( $res ) ) {
+ $res = $db->select( 'brokenlinks', array( 'bl_to' ), array( 'bl_from' => $id ), $fname, array( $options ) );
+ while( $s = $db->fetchObject( $res ) ) {
$this->addBadLink( $s->bl_to );
}
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 );
}
- # 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;
}
return true;
}
- # Clears cache but leaves old preFill copies alone
- function clear()
- {
+ /**
+ * Clears cache but leaves old preFill copies alone
+ */
+ function clear() {
$this->mGoodLinks = array();
$this->mBadLinks = array();
$this->mImageLinks = array();
}
- /* private */ function fillFromLinkscc( $id ){
- $id = IntVal( $id );
- $res = wfQuery("SELECT lcc_cacheobj FROM linkscc WHERE lcc_pageid = $id",
- DB_READ);
- $row = wfFetchObject( $res );
- if( $row == FALSE)
- return false;
+ /**
+ * @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( $row->lcc_cacheobj );
+ if( function_exists( 'gzuncompress' ) )
+ $cacheobj = @gzuncompress( $raw );
if($cacheobj == FALSE){
- $cacheobj = $row->lcc_cacheobj;
+ $cacheobj = $raw;
}
$cc = @unserialize( $cacheobj );
if( isset( $cc->mClassVer ) and ($cc->mClassVer == $this->mClassVer ) ){
}
- /* private */ function saveToLinkscc( $pid ){
- global $wgCompressedPersistentLC, $wgIsMySQL;
- if( $wgCompressedPersistentLC and function_exists( "gzcompress" ) ) {
- $ser = wfStrencode( gzcompress( serialize( $this ), 3 ));
- } else {
- $ser = wfStrencode( serialize( $this ) );
- }
- if ($wgIsMySQL) {
- wfQuery("REPLACE INTO linkscc(lcc_pageid,lcc_cacheobj) " .
- "VALUES({$pid}, '{$ser}')", DB_WRITE);
+ /**
+ * @access private
+ */
+ function saveToLinkscc( $pid ){
+ global $wgCompressedPersistentLC;
+ if( $wgCompressedPersistentLC and function_exists( 'gzcompress' ) ) {
+ $ser = gzcompress( serialize( $this ), 3 );
} else {
- wfQuery("DELETE FROM linkscc WHERE lcc_pageid={$pid}",DB_WRITE);
- wfQuery("INSERT INTO linkscc(lcc_pageid,lcc_cacheobj) " .
- "VALUES({$pid}, '{$ser}')", DB_WRITE);
+ $ser = serialize( $this );
}
+ $db =& wfGetDB( DB_MASTER );
+ $db->replace( 'linkscc', array( 'lcc_pageid' ), array( 'lcc_pageid' => $pid, 'lcc_cacheobj' => $ser ) );
}
- # $pid is a page id
- /* static */ function linksccClearLinksTo( $pid ){
- global $wgEnablePersistentLC, $wgIsMySQL;
+ /**
+ * 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( $pid );
- if ($wgIsMySQL) {
- wfQuery("DELETE linkscc FROM linkscc,links ".
- "WHERE lcc_pageid=links.l_from AND l_to={$pid}", DB_WRITE);
- } else {
- wfQuery("DELETE FROM linkscc WHERE lcc_pageid IN ".
- "(SELECT l_from FROM links WHERE l_to={$pid})", DB_WRITE);
- }
- wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pid}'", 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 );
+ # Delete linkscc row representing this page
+ $dbw->delete( 'linkscc', array( 'lcc_pageid' => $pid ), $fname);
}
+
}
- # $title is a prefixed db title, for example like Title->getPrefixedDBkey() returns.
- /* static */ function linksccClearBrokenLinksTo( $title ){
- global $wgEnablePersistentLC,$wgIsMySQL;
+ /**
+ * 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 ) {
- $title = wfStrencode( $title );
- if ($wgIsMySQL) {
- wfQuery("DELETE linkscc FROM linkscc,brokenlinks ".
- "WHERE lcc_pageid=bl_from AND bl_to='{$title}'", DB_WRITE);
- } else {
- wfQuery("DELETE FROM linkscc WHERE lcc_pageid IN ".
- "(SELECT bl_from FROM brokenlinks ".
- "WHERE bl_to='{$title}')",DB_WRITE);
- }
+ $dbw =& wfGetDB( DB_MASTER );
+ $dbw->deleteJoin( 'linkscc', 'brokenlinks', 'lcc_pageid', 'bl_from', array( 'bl_to' => $title ), $fname );
}
}
- # $pid is a page id
- /* static */ function linksccClearPage( $pid ){
+ /**
+ * @param $pid is a page id
+ * @static
+ */
+ function linksccClearPage( $pid ){
global $wgEnablePersistentLC;
if ( $wgEnablePersistentLC ) {
$pid = intval( $pid );
- wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pid}'", DB_WRITE);
+ $dbw =& wfGetDB( DB_MASTER );
+ $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
+ */
+class LinkBatch {
+ /**
+ * 2-d array, first index namespace, second index dbkey, value arbitrary
+ */
+ var $data = array();
+
+ 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 ";
+ $first = true;
+
+ foreach ( $this->data as $ns => $dbkeys ) {
+ if ( !count( $dbkeys ) ) {
+ continue;
+ }
+
+ if ( $first ) {
+ $first = false;
+ } else {
+ $sql .= ' OR ';
+ }
+ $sql .= "(page_namespace=$ns AND page_title IN (";
+
+ $firstTitle = true;
+ foreach( $dbkeys as $dbkey => $nothing ) {
+ if ( $firstTitle ) {
+ $firstTitle = false;
+ } else {
+ $sql .= ',';
+ }
+ $sql .= $dbr->addQuotes( $dbkey );
+ }
+
+ $sql .= '))';
+ }
+
+ // 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->addGoodLink( $row->page_id, $title->getPrefixedDBkey() );
+ 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->addBadLink( $title->getPrefixedText() );
+ }
+ }
+
+ wfProfileOut( $fname );
+ }
+}
+
?>
dépôts / lhc / web / wiklou.git / blobdiff