00001 <?php
00026 require_once( dirname(__FILE__) . '/Maintenance.php' );
00027
00028 class DeleteImageCache extends Maintenance {
00029 public function __construct() {
00030 parent::__construct();
00031 $this->mDescription = "Delete image information from the cache";
00032 $this->addOption( 'sleep', 'How many seconds to sleep between deletions', true, true );
00033 $this->addOption( 'until', 'Timestamp to delete all entries prior to', true, true );
00034 }
00035
00036 public function execute() {
00037 global $wgMemc;
00038
00039 $until = preg_replace( "/[^\d]/", '', $this->getOption('until') );
00040 $sleep = (int)$this->getOption('sleep') * 1000;
00041
00042 ini_set( 'display_errors', false );
00043
00044 $dbr = wfGetDB( DB_SLAVE );
00045
00046 $res = $dbr->select( 'image',
00047 array( 'img_name' ),
00048 array( "img_timestamp < {$until}" ),
00049 __METHOD__
00050 );
00051
00052 $i = 0;
00053 $total = $this->getImageCount();
00054
00055 foreach ( $res as $row ) {
00056 if ($i % $this->report == 0)
00057 $this->output( sprintf("%s: %13s done (%s)\n", wfWikiID(), "$i/$total", wfPercent( $i / $total * 100 ) ) );
00058 $md5 = md5( $row->img_name );
00059 $wgMemc->delete( wfMemcKey( 'Image', $md5 ) );
00060
00061 if ($sleep != 0)
00062 usleep( $sleep );
00063
00064 ++$i;
00065 }
00066 }
00067
00068 private function getImageCount() {
00069 $dbr = wfGetDB( DB_SLAVE );
00070 return $dbr->selectField( 'image', 'COUNT(*)', array(), __METHOD__ );
00071 }
00072 }
00073
00074 $maintClass = "DeleteImageCache";
00075 require_once( DO_MAINTENANCE );