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<?php
/**
* Update for the 'page_counter' field
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* Update for the 'page_counter' field, when $wgDisableCounters is false.
*
* Depending on $wgHitcounterUpdateFreq, this will directly increment the
* 'page_counter' field or use the 'hitcounter' table and then collect the data
* from that table to update the 'page_counter' field in a batch operation.
*/
class ViewCountUpdate implements DeferrableUpdate {
/** @var int Page ID to increment the view count */
protected $id;
/**
* Constructor
*
* @param int $id Page ID to increment the view count
*/
public function __construct( $id ) {
$this->id = intval( $id );
}
/**
* Run the update
*/
public function doUpdate() {
global $wgHitcounterUpdateFreq;
$dbw = wfGetDB( DB_MASTER );
if ( $wgHitcounterUpdateFreq <= 1 || $dbw->getType() == 'sqlite' ) {
$id = $this->id;
$method = __METHOD__;
$dbw->onTransactionIdle( function () use ( $dbw, $id, $method ) {
try {
$dbw->update( 'page',
array( 'page_counter = page_counter + 1' ),
array( 'page_id' => $id ),
$method
);
} catch ( DBError $e ) {
MWExceptionHandler::logException( $e );
}
} );
return;
}
# Not important enough to warrant an error page in case of failure
try {
// Since `hitcounter` is non-transactional, the contention is minimal
$dbw->insert( 'hitcounter', array( 'hc_id' => $this->id ), __METHOD__ );
$checkfreq = intval( $wgHitcounterUpdateFreq / 25 + 1 );
if ( rand() % $checkfreq == 0 && $dbw->lastErrno() == 0 ) {
$this->collect();
}
} catch ( DBError $e ) {
MWExceptionHandler::logException( $e );
}
}
protected function collect() {
global $wgHitcounterUpdateFreq;
$dbw = wfGetDB( DB_MASTER );
$rown = $dbw->selectField( 'hitcounter', 'COUNT(*)', array(), __METHOD__ );
if ( $rown < $wgHitcounterUpdateFreq ) {
return;
}
wfProfileIn( __METHOD__ . '-collect' );
$old_user_abort = ignore_user_abort( true );
$dbType = $dbw->getType();
$tabletype = $dbType == 'mysql' ? "ENGINE=HEAP " : '';
$hitcounterTable = $dbw->tableName( 'hitcounter' );
$acchitsTable = $dbw->tableName( 'acchits' );
$pageTable = $dbw->tableName( 'page' );
$dbw->lockTables( array(), array( 'hitcounter' ), __METHOD__, false );
$dbw->query( "CREATE TEMPORARY TABLE $acchitsTable $tabletype AS " .
"SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable " .
'GROUP BY hc_id', __METHOD__ );
$dbw->delete( 'hitcounter', '*', __METHOD__ );
$dbw->unlockTables( __METHOD__ );
if ( $dbType == 'mysql' ) {
$dbw->query( "UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n " .
'WHERE page_id = hc_id', __METHOD__ );
} else {
$dbw->query( "UPDATE $pageTable SET page_counter=page_counter + hc_n " .
"FROM $acchitsTable WHERE page_id = hc_id", __METHOD__ );
}
$dbw->query( "DROP TABLE $acchitsTable", __METHOD__ );
ignore_user_abort( $old_user_abort );
wfProfileOut( __METHOD__ . '-collect' );
}
}
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