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   1  <?php
   2  
   3  final class DifferentialParseCacheGarbageCollector
   4    extends PhabricatorGarbageCollector {
   5  
   6    public function collectGarbage() {
   7      $key = 'gcdaemon.ttl.differential-parse-cache';
   8      $ttl = PhabricatorEnv::getEnvConfig($key);
   9      if ($ttl <= 0) {
  10        return false;
  11      }
  12  
  13      $table = new DifferentialChangeset();
  14      $conn_w = $table->establishConnection('w');
  15  
  16      queryfx(
  17        $conn_w,
  18        'DELETE FROM %T WHERE dateCreated < %d LIMIT 100',
  19        DifferentialChangeset::TABLE_CACHE,
  20        time() - $ttl);
  21  
  22      return ($conn_w->getAffectedRows() == 100);
  23    }
  24  
  25  }