<?php
/**
* Cache for article titles (prefixed DB keys) and ids linked from one source
- *
- * @addtogroup Cache
+ *
+ * @ingroup Cache
*/
class LinkCache {
// Increment $mClassVer whenever old serialized versions of this class
// becomes incompatible with the new version.
- /* private */ var $mClassVer = 3;
+ /* private */ var $mClassVer = 4;
- /* private */ var $mPageLinks;
/* private */ var $mGoodLinks, $mBadLinks;
/* private */ var $mForUpdate;
function __construct() {
$this->mForUpdate = false;
- $this->mPageLinks = array();
$this->mGoodLinks = array();
+ $this->mGoodLinkFields = array();
$this->mBadLinks = 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 ) {
+ public function forUpdate( $update = null ) {
return wfSetVar( $this->mForUpdate, $update );
}
- function getGoodLinkID( $title ) {
+ public function getGoodLinkID( $title ) {
if ( array_key_exists( $title, $this->mGoodLinks ) ) {
return $this->mGoodLinks[$title];
} else {
}
}
- function isBadLink( $title ) {
+ /**
+ * Get a field of a title object from cache.
+ * If this link is not good, it will return NULL.
+ * @param Title $title
+ * @param string $field ('length','redirect')
+ * @return mixed
+ */
+ public function getGoodLinkFieldObj( $title, $field ) {
+ $dbkey = $title->getPrefixedDbKey();
+ if ( array_key_exists( $dbkey, $this->mGoodLinkFields ) ) {
+ return $this->mGoodLinkFields[$dbkey][$field];
+ } else {
+ return null;
+ }
+ }
+
+ public function isBadLink( $title ) {
return array_key_exists( $title, $this->mBadLinks );
}
- function addGoodLinkObj( $id, $title ) {
+ /**
+ * Add a link for the title to the link cache
+ * @param int $id
+ * @param Title $title
+ * @param int $len
+ * @param int $redir
+ */
+ public function addGoodLinkObj( $id, $title, $len = -1, $redir = null ) {
$dbkey = $title->getPrefixedDbKey();
- $this->mGoodLinks[$dbkey] = $id;
- $this->mPageLinks[$dbkey] = $title;
+ $this->mGoodLinks[$dbkey] = intval( $id );
+ $this->mGoodLinkFields[$dbkey] = array(
+ 'length' => intval( $len ),
+ 'redirect' => intval( $redir ) );
}
- function addBadLinkObj( $title ) {
+ public function addBadLinkObj( $title ) {
$dbkey = $title->getPrefixedDbKey();
- if ( ! $this->isBadLink( $dbkey ) ) {
+ if ( !$this->isBadLink( $dbkey ) ) {
$this->mBadLinks[$dbkey] = 1;
- $this->mPageLinks[$dbkey] = $title;
}
}
- function clearBadLink( $title ) {
+ public function clearBadLink( $title ) {
unset( $this->mBadLinks[$title] );
- $this->clearLink( $title );
}
- function clearLink( $title ) {
- global $wgMemc, $wgLinkCacheMemcached;
- if( $wgLinkCacheMemcached )
- $wgMemc->delete( $this->getKey( $title ) );
+ public function clearLink( $title ) {
+ $dbkey = $title->getPrefixedDbKey();
+ if( isset($this->mBadLinks[$dbkey]) ) {
+ unset($this->mBadLinks[$dbkey]);
+ }
+ if( isset($this->mGoodLinks[$dbkey]) ) {
+ unset($this->mGoodLinks[$dbkey]);
+ }
+ if( isset($this->mGoodLinkFields[$dbkey]) ) {
+ unset($this->mGoodLinkFields[$dbkey]);
+ }
}
- function getPageLinks() { return $this->mPageLinks; }
- function getGoodLinks() { return $this->mGoodLinks; }
- function getBadLinks() { return array_keys( $this->mBadLinks ); }
+ public function getGoodLinks() { return $this->mGoodLinks; }
+ public function getBadLinks() { return array_keys( $this->mBadLinks ); }
/**
* Add a title to the link cache, return the page_id or zero if non-existent
* @param $title String: title to add
+ * @param $len int, page size
+ * @param $redir bool, is redirect?
* @return integer
*/
- function addLink( $title ) {
+ public function addLink( $title, $len = -1, $redir = null ) {
$nt = Title::newFromDBkey( $title );
if( $nt ) {
- return $this->addLinkObj( $nt );
+ return $this->addLinkObj( $nt, $len, $redir );
} else {
return 0;
}
/**
* Add a title to the link cache, return the page_id or zero if non-existent
* @param $nt Title to add.
+ * @param $len int, page size
+ * @param $redir bool, is redirect?
* @return integer
*/
- function addLinkObj( &$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';
- global $wgProfiling, $wgProfiler;
- if ( $wgProfiling && isset( $wgProfiler ) ) {
- $fname .= ' (' . $wgProfiler->getCurrentSection() . ')';
- }
-
- wfProfileIn( $fname );
+ public function addLinkObj( &$nt, $len = -1, $redirect = null ) {
+ global $wgAntiLockFlags, $wgProfiler;
+ wfProfileIn( __METHOD__ );
- $ns = $nt->getNamespace();
- $t = $nt->getDBkey();
-
- if ( '' == $title ) {
- wfProfileOut( $fname );
+ $key = $nt->getPrefixedDBkey();
+ if ( $this->isBadLink( $key ) ) {
+ wfProfileOut( __METHOD__ );
return 0;
}
+ $id = $this->getGoodLinkID( $key );
+ if ( $id != 0 ) {
+ wfProfileOut( __METHOD__ );
+ return $id;
+ }
- $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 {
- $options = array();
- }
+ if ( $key === '' ) {
+ wfProfileOut( __METHOD__ );
+ return 0;
+ }
+
+ # Some fields heavily used for linking...
+ if ( $this->mForUpdate ) {
+ $db = wfGetDB( DB_MASTER );
+ if ( !( $wgAntiLockFlags & ALF_NO_LINK_LOCK ) ) {
+ $options = array( 'FOR UPDATE' );
} else {
- $db = wfGetDB( DB_SLAVE );
$options = array();
}
+ } 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;
- }
- if( $wgLinkCacheMemcached )
- $wgMemc->add( $key, $id, 3600*24 );
+ $s = $db->selectRow( 'page',
+ array( 'page_id', 'page_len', 'page_is_redirect' ),
+ array( 'page_namespace' => $nt->getNamespace(), 'page_title' => $nt->getDBkey() ),
+ __METHOD__, $options );
+ # Set fields...
+ if ( $s !== false ) {
+ $id = intval( $s->page_id );
+ $len = intval( $s->page_len );
+ $redirect = intval( $s->page_is_redirect );
+ } else {
+ $len = -1;
+ $redirect = 0;
}
- if( 0 == $id ) {
+ if ( $id == 0 ) {
$this->addBadLinkObj( $nt );
} else {
- $this->addGoodLinkObj( $id, $nt );
+ $this->addGoodLinkObj( $id, $nt, $len, $redirect );
}
- wfProfileOut( $fname );
+ wfProfileOut( __METHOD__ );
return $id;
}
/**
* Clears cache
*/
- function clear() {
- $this->mPageLinks = array();
+ public function clear() {
$this->mGoodLinks = array();
+ $this->mGoodLinkFields = array();
$this->mBadLinks = array();
}
}
-
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff