-<?
-# Cache for article titles and ids linked from one source
+<?php
+# Cache for article titles (prefixed DB keys) and ids linked from one source
-class LinkCache {
+# These are used in incrementalSetup()
+define ('LINKCACHE_GOOD', 0);
+define ('LINKCACHE_BAD', 1);
+define ('LINKCACHE_IMAGE', 2);
- /* private */ var $mGoodLinks, $mBadLinks, $mActive;
- /* private */ var $mImageLinks;
+class LinkCache {
+ // Increment $mClassVer whenever old serialized versions of this class
+ // becomes incompatible with the new version.
+ /* private */ var $mClassVer = 1;
+ /* private */ var $mGoodLinks, $mBadLinks, $mActive;
+ /* private */ var $mImageLinks;
+ /* private */ var $mPreFilled, $mOldGoodLinks, $mOldBadLinks;
+
+ /* private */ function getKey( $title ) {
+ global $wgDBname;
+ return "$wgDBname:lc:title:$title";
+ }
+
function LinkCache()
{
$this->mActive = true;
+ $this->mPreFilled = false;
$this->mGoodLinks = array();
$this->mBadLinks = array();
$this->mImageLinks = array();
+ $this->mOldGoodLinks = array();
+ $this->mOldBadLinks = array();
}
function getGoodLinkID( $title )
function isBadLink( $title )
{
- return in_array( $title, $this->mBadLinks );
+ return array_key_exists( $title, $this->mBadLinks );
}
function addGoodLink( $id, $title )
function addBadLink( $title )
{
if ( $this->mActive && ( ! $this->isBadLink( $title ) ) ) {
- array_push( $this->mBadLinks, $title );
+ $this->mBadLinks[$title] = 1;
}
}
if ( $this->mActive ) { $this->mImageLinks[$title] = 1; }
}
+ function addImageLinkObj( $nt )
+ {
+ if ( $this->mActive ) { $this->mImageLinks[$nt->getDBkey()] = 1; }
+ }
+
function clearBadLink( $title )
{
- $index = array_search( $title, $this->mBadLinks );
- if ( isset( $index ) ) {
- unset( $this->mBadLinks[$index] );
- }
+ 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 getGoodLinks() { return $this->mGoodLinks; }
- function getBadLinks() { return $this->mBadLinks; }
+ function getBadLinks() { return array_keys( $this->mBadLinks ); }
function getImageLinks() { return $this->mImageLinks; }
function addLink( $title )
{
- if ( $this->isBadLink( $title ) ) { return 0; }
+ $nt = Title::newFromDBkey( $title );
+ if( $nt ) {
+ return $this->addLinkObj( $nt );
+ } else {
+ return 0;
+ }
+ }
+
+ function addLinkObj( &$nt )
+ {
+ global $wgMemc, $wgLinkCacheMemcached;
+ $title = $nt->getPrefixedDBkey();
+ if ( $this->isBadLink( $title ) ) { return 0; }
$id = $this->getGoodLinkID( $title );
if ( 0 != $id ) { return $id; }
- wfProfileIn( "LinkCache::addLink-checkdatabase" );
+ $fname = "LinkCache::addLinkObj";
+ wfProfileIn( $fname );
- $nt = Title::newFromDBkey( $title );
$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 ) ) {
+ $sql = "SELECT cur_id FROM cur WHERE cur_namespace=" .
+ "{$ns} AND cur_title='" . wfStrencode( $t ) . "'";
+ $res = wfQuery( $sql, DB_READ, "LinkCache::addLink" );
- if ( 0 == wfNumRows( $res ) ) {
- $id = 0;
- } else {
- $s = wfFetchObject( $res );
- $id = $s->cur_id;
+ if ( 0 == wfNumRows( $res ) ) {
+ $id = 0;
+ } else {
+ $s = wfFetchObject( $res );
+ $id = $s->cur_id;
+ }
+ if( $wgLinkCacheMemcached )
+ $wgMemc->add( $key, $id, 3600*24 );
}
+
if ( 0 == $id ) { $this->addBadLink( $title ); }
else { $this->addGoodLink( $id, $title ); }
- wfProfileOut();
+ wfProfileOut( $fname );
return $id;
}
- function preFill( $fromtitle )
+ function preFill( &$fromtitle )
{
- wfProfileIn( "LinkCache::preFill" );
+ global $wgEnablePersistentLC;
+
+ $fname = "LinkCache::preFill";
+ wfProfileIn( $fname );
# Note -- $fromtitle is a Title *object*
- $dbkeyfrom = wfStrencode( $fromtitle->getPrefixedDBKey() );
- $sql = "SELECT HIGH_PRIORITY cur_id,cur_namespace,cur_title
+
+ $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 ) ){
+ return;
+ }
+ }
+
+ $sql = "SELECT cur_id,cur_namespace,cur_title
FROM cur,links
- WHERE cur_id=l_to AND l_from='{$dbkeyfrom}'";
- $res = wfQuery( $sql, "LinkCache::preFill" );
+ WHERE cur_id=l_to AND l_from=$id";
+ $res = wfQuery( $sql, DB_READ, $fname );
while( $s = wfFetchObject( $res ) ) {
$this->addGoodLink( $s->cur_id,
Title::makeName( $s->cur_namespace, $s->cur_title )
);
}
-
- $sql = "SELECT HIGH_PRIORITY bl_to
+
+ $sql = "SELECT bl_to
FROM brokenlinks
- WHERE bl_from='{$dbkeyfrom}'";
- $res = wfQuery( $sql, "LinkCache::preFill" );
+ WHERE bl_from='{$id}'";
+ $res = wfQuery( $sql, DB_READ, "LinkCache::preFill" );
while( $s = wfFetchObject( $res ) ) {
$this->addBadLink( $s->bl_to );
}
+
+ $this->mOldBadLinks = $this->mBadLinks;
+ $this->mOldGoodLinks = $this->mGoodLinks;
+ $this->mPreFilled = true;
- wfProfileOut();
+ if ( $wgEnablePersistentLC ) {
+ $this->saveToLinkscc( $id );
+ }
+ 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: $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 )
+ {
+ 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;
+ }
+
+ # 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;
+
+ $cacheobj = false;
+ if( function_exists( "gzuncompress" ) )
+ $cacheobj = @gzuncompress( $row->lcc_cacheobj );
+
+ if($cacheobj == FALSE){
+ $cacheobj = $row->lcc_cacheobj;
+ }
+ $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;
+ }
+
+ }
+
+ /* private */ function saveToLinkscc( $pid ){
+ global $wgCompressedPersistentLC;
+ if( $wgCompressedPersistentLC and function_exists( "gzcompress" ) ) {
+ $ser = wfStrencode( gzcompress( serialize( $this ), 3 ));
+ } else {
+ $ser = wfStrencode( serialize( $this ) );
+ }
+ wfQuery("REPLACE INTO linkscc(lcc_pageid,lcc_cacheobj) " .
+ "VALUES({$pid}, '{$ser}')", DB_WRITE);
+ }
+
+ # $pid is a page id
+ /* static */ function linksccClearLinksTo( $pid ){
+ $pid = intval( $pid );
+ wfQuery("DELETE linkscc FROM linkscc,links ".
+ "WHERE lcc_pageid=links.l_from AND l_to={$pid}", DB_WRITE);
+ wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pid}'", DB_WRITE);
+ }
+
+ # $title is a prefixed db title, for example like Title->getPrefixedDBkey() returns.
+ /* static */ function linksccClearBrokenLinksTo( $title ){
+ $title = wfStrencode( $title );
+ wfQuery("DELETE linkscc FROM linkscc,brokenlinks ".
+ "WHERE lcc_pageid=bl_from AND bl_to='{$title}'", DB_WRITE);
+ }
+
+ # $pid is a page id
+ /* static */ function linksccClearPage( $pid ){
+ $pid = intval( $pid );
+ wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pid}'", DB_WRITE);
+ }
+}
?>
dépôts / lhc / web / wiklou.git / blobdiff