/**
* Class representing a list of titles
* The execute() method checks them all for existence and adds them to a LinkCache object
- +
- * @package MediaWiki
- * @subpackage Cache
+ *
+ * @ingroup Cache
*/
class LinkBatch {
/**
*/
var $data = array();
- function LinkBatch( $arr = array() ) {
+ /**
+ * For debugging which method is using this class.
+ */
+ protected $caller;
+
+ function __construct( $arr = array() ) {
foreach( $arr as $item ) {
$this->addObj( $item );
}
}
- function addObj( $title ) {
+ /**
+ * Use ->setCaller( __METHOD__ ) to indicate which code is using this
+ * class. Only used in debugging output.
+ * @since 1.17
+ */
+ public function setCaller( $caller ) {
+ $this->caller = $caller;
+ }
+
+ public function addObj( $title ) {
if ( is_object( $title ) ) {
$this->add( $title->getNamespace(), $title->getDBkey() );
} else {
}
}
- function add( $ns, $dbkey ) {
+ public function add( $ns, $dbkey ) {
if ( $ns < 0 ) {
return;
}
$this->data[$ns] = array();
}
- $this->data[$ns][$dbkey] = 1;
+ $this->data[$ns][str_replace( ' ', '_', $dbkey )] = 1;
}
/**
* Set the link list to a given 2-d array
* First key is the namespace, second is the DB key, value arbitrary
*/
- function setArray( $array ) {
+ public function setArray( $array ) {
$this->data = $array;
}
/**
* Returns true if no pages have been added, false otherwise.
*/
- function isEmpty() {
+ public function isEmpty() {
return ($this->getSize() == 0);
}
/**
* Returns the size of the batch.
*/
- function getSize() {
+ public function getSize() {
return count( $this->data );
}
* Do the query and add the results to the LinkCache object
* Return an array mapping PDBK to ID
*/
- function execute() {
- $linkCache =& LinkCache::singleton();
- $this->executeInto( $linkCache );
+ public function execute() {
+ $linkCache = LinkCache::singleton();
+ return $this->executeInto( $linkCache );
}
/**
* Do the query and add the results to a given LinkCache object
* Return an array mapping PDBK to ID
*/
- function executeInto( &$cache ) {
- $fname = 'LinkBatch::executeInto';
- wfProfileIn( $fname );
- // Do query
+ protected function executeInto( &$cache ) {
+ wfProfileIn( __METHOD__ );
$res = $this->doQuery();
+ $ids = $this->addResultToCache( $cache, $res );
+ wfProfileOut( __METHOD__ );
+ return $ids;
+ }
+
+ /**
+ * Add a ResultWrapper containing IDs and titles to a LinkCache object.
+ * As normal, titles will go into the static Title cache field.
+ * This function *also* stores extra fields of the title used for link
+ * parsing to avoid extra DB queries.
+ */
+ public function addResultToCache( $cache, $res ) {
if ( !$res ) {
- wfProfileOut( $fname );
return array();
}
$ids = array();
$remaining = $this->data;
- while ( $row = $res->fetchObject() ) {
+ foreach ( $res as $row ) {
$title = Title::makeTitle( $row->page_namespace, $row->page_title );
- $cache->addGoodLinkObj( $row->page_id, $title );
+ $cache->addGoodLinkObj( $row->page_id, $title, $row->page_len, $row->page_is_redirect, $row->page_latest );
$ids[$title->getPrefixedDBkey()] = $row->page_id;
unset( $remaining[$row->page_namespace][$row->page_title] );
}
- $res->free();
// The remaining links in $data are bad links, register them as such
foreach ( $remaining as $ns => $dbkeys ) {
- foreach ( $dbkeys as $dbkey => $nothing ) {
+ foreach ( $dbkeys as $dbkey => $unused ) {
$title = Title::makeTitle( $ns, $dbkey );
$cache->addBadLinkObj( $title );
$ids[$title->getPrefixedDBkey()] = 0;
}
}
- wfProfileOut( $fname );
return $ids;
}
/**
* Perform the existence test query, return a ResultWrapper with page_id fields
*/
- function doQuery() {
- $fname = 'LinkBatch::doQuery';
- $namespaces = array();
-
+ public function doQuery() {
if ( $this->isEmpty() ) {
return false;
}
- wfProfileIn( $fname );
-
- // Construct query
- // This is very similar to Parser::replaceLinkHolders
- $dbr =& wfGetDB( DB_SLAVE );
- $page = $dbr->tableName( 'page' );
- $set = $this->constructSet( 'page', $dbr );
- if ( $set === false ) {
- wfProfileOut( $fname );
- return false;
- }
- $sql = "SELECT page_id, page_namespace, page_title FROM $page WHERE $set";
+ wfProfileIn( __METHOD__ );
+
+ // This is similar to LinkHolderArray::replaceInternal
+ $dbr = wfGetDB( DB_SLAVE );
+ $table = 'page';
+ $fields = array( 'page_id', 'page_namespace', 'page_title', 'page_len',
+ 'page_is_redirect', 'page_latest' );
+ $conds = $this->constructSet( 'page', $dbr );
// Do query
- $res = new ResultWrapper( $dbr, $dbr->query( $sql, $fname ) );
- wfProfileOut( $fname );
+ $caller = __METHOD__;
+ if ( strval( $this->caller ) !== '' ) {
+ $caller .= " (for {$this->caller})";
+ }
+ $res = $dbr->select( $table, $fields, $conds, $caller );
+ wfProfileOut( __METHOD__ );
return $res;
}
/**
* Construct a WHERE clause which will match all the given titles.
- * Give the appropriate table's field name prefix ('page', 'pl', etc).
*
- * @param $prefix String: ??
- * @return string
- * @public
+ * @param $prefix String: the appropriate table's field name prefix ('page', 'pl', etc)
+ * @param $db DatabaseBase object to use
+ * @return mixed string with SQL where clause fragment, or false if no items.
*/
- function constructSet( $prefix, &$db ) {
- $first = true;
- $firstTitle = 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 .= '))';
- }
- if ( $first && $firstTitle ) {
- # No titles added
- return false;
- } else {
- return $sql;
- }
+ public function constructSet( $prefix, $db ) {
+ return $db->makeWhereFrom2d( $this->data, "{$prefix}_namespace", "{$prefix}_title" );
}
}
-
-?>
dépôts / lhc / web / wiklou.git / blobdiff