-<?
-# Cache for article titles and ids linked from one source
+<?php
+/**
+ * Cache for article titles (prefixed DB keys) and ids linked from one source
+ * @package MediaWiki
+ * @subpackage Cache
+ */
-class LinkCache {
+/**
+ *
+ */
+# 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 = 3;
+
+ /* private */ var $mPageLinks;
/* private */ var $mGoodLinks, $mBadLinks, $mActive;
- /* private */ var $mImageLinks;
+ /* private */ var $mImageLinks, $mCategoryLinks;
+ /* private */ var $mPreFilled, $mOldGoodLinks, $mOldBadLinks;
+ /* private */ var $mForUpdate;
- function LinkCache()
- {
+ /* private */ function getKey( $title ) {
+ global $wgDBname;
+ return $wgDBname.':lc:title:'.$title;
+ }
+
+ function LinkCache() {
$this->mActive = true;
+ $this->mPreFilled = false;
+ $this->mForUpdate = false;
+ $this->mPageLinks = array();
$this->mGoodLinks = array();
$this->mBadLinks = array();
$this->mImageLinks = array();
+ $this->mCategoryLinks = array();
+ $this->mOldGoodLinks = array();
+ $this->mOldBadLinks = array();
+ $this->mOldPageLinks = 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 )
- {
- return in_array( $title, $this->mBadLinks );
+ 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 ) ) ) {
- array_push( $this->mBadLinks, $title );
+ 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 clearBadLink( $title )
- {
- $index = array_search( $title, $this->mBadLinks );
- if ( isset( $index ) ) {
- unset( $this->mBadLinks[$index] );
- }
+ 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 $this->mBadLinks; }
+ function getBadLinks() { return array_keys( $this->mBadLinks ); }
function getImageLinks() { return $this->mImageLinks; }
+ function getCategoryLinks() { return $this->mCategoryLinks; }
- function addLink( $title )
- {
- if ( $this->isBadLink( $title ) ) { return 0; }
+ function addLink( $title ) {
+ $nt = Title::newFromDBkey( $title );
+ if( $nt ) {
+ return $this->addLinkObj( $nt );
+ } else {
+ return 0;
+ }
+ }
+
+ function addLinkObj( &$nt ) {
+ global $wgMemc, $wgLinkCacheMemcached, $wgAntiLockFlags;
+ $title = $nt->getPrefixedDBkey();
+ if ( $this->isBadLink( $title ) ) { return 0; }
$id = $this->getGoodLinkID( $title );
if ( 0 != $id ) { return $id; }
- $nt = Title::newFromDBkey( $title );
+ $fname = 'LinkCache::addLinkObj';
+ wfProfileIn( $fname );
+
$ns = $nt->getNamespace();
$t = $nt->getDBkey();
- if ( "" == $t ) { return 0; }
- $sql = "SELECT HIGH_PRIORITY cur_id FROM cur WHERE cur_namespace=" .
- "{$ns} AND cur_title='" . wfStrencode( $t ) . "'";
- $res = wfQuery( $sql, "LinkCache::addLink" );
+ if ( '' == $title ) {
+ wfProfileOut( $fname );
+ return 0;
+ }
+
+ $id = NULL;
+ if( $wgLinkCacheMemcached )
+ $id = $wgMemc->get( $key = $this->getKey( $title ) );
+ if( ! is_integer( $id ) ) {
+ if ( $this->mForUpdate ) {
+ $db =& wfGetDB( DB_MASTER );
+ if ( !( $wgAntiLockFlags & ALF_NO_LINK_LOCK ) ) {
+ $options = array( 'FOR UPDATE' );
+ }
+ } else {
+ $db =& wfGetDB( DB_SLAVE );
+ $options = array();
+ }
- if ( 0 == wfNumRows( $res ) ) {
- $id = 0;
+ $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->addBadLinkObj( $nt );
} else {
- $s = wfFetchObject( $res );
- $id = $s->cur_id;
+ $this->addGoodLinkObj( $id, $nt );
}
- if ( 0 == $id ) { $this->addBadLink( $title ); }
- else { $this->addGoodLink( $id, $title ); }
+ wfProfileOut( $fname );
return $id;
}
- function preFill( $fromtitle )
- {
- wfProfileIn( "LinkCache::preFill" );
- # Note -- $fromtitle is a Title *object*
- $dbkeyfrom = wfStrencode( $fromtitle->getPrefixedDBKey() );
- $sql = "SELECT HIGH_PRIORITY cur_id,cur_namespace,cur_title
- FROM cur,links
- WHERE cur_id=l_to AND l_from='{$dbkeyfrom}'";
- $res = wfQuery( $sql, "LinkCache::preFill" );
- while( $s = wfFetchObject( $res ) ) {
- $this->addGoodLink( $s->cur_id,
- Title::makeName( $s->cur_namespace, $s->cur_title )
- );
+ /**
+ * Bulk-check the pagelinks and page arrays for existence info.
+ * @param Title $fromtitle
+ */
+ function preFill( &$fromtitle ) {
+ $fname = 'LinkCache::preFill';
+ wfProfileIn( $fname );
+
+ $this->suspend();
+ $id = $fromtitle->getArticleID();
+ $this->resume();
+
+ if( $id == 0 ) {
+ wfDebug( "$fname - got id 0 for title '" . $fromtitle->getPrefixedDBkey() . "'\n" );
+ wfProfileOut( $fname );
+ return;
+ }
+
+ if ( $this->mForUpdate ) {
+ $db =& wfGetDB( DB_MASTER );
+ $options = 'FOR UPDATE';
+ } else {
+ $db =& wfGetDB( DB_SLAVE );
+ $options = '';
+ }
+
+ $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->mPreFilled = true;
+
+ 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 );
+ }
+
+ 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:
+ * @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;
+ 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
+ */
+ function clear() {
+ $this->mPageLinks = array();
+ $this->mGoodLinks = array();
+ $this->mBadLinks = array();
+ $this->mImageLinks = array();
+ $this->mCategoryLinks = array();
+ $this->mOldGoodLinks = array();
+ $this->mOldBadLinks = array();
+ $this->mOldPageLinks = array();
+ }
+
+ /**
+ * Swaps old and current link registers
+ */
+ function swapRegisters() {
+ swap( $this->mGoodLinks, $this->mOldGoodLinks );
+ swap( $this->mBadLinks, $this->mOldBadLinks );
+ swap( $this->mImageLinks, $this->mOldImageLinks );
+ }
+}
+
+/**
+ * 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();
+
+ 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