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PhabricatorCacheTTLGarbageCollector.php
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			<?php

			final class PhabricatorCacheTTLGarbageCollector
			extends PhabricatorGarbageCollector {

			const COLLECTORCONST = 'cache.general.ttl';

			public function getCollectorName() {
			return pht('General Cache (TTL)');
			}

			public function hasAutomaticPolicy() {
			return true;
			}

			protected function collectGarbage() {
			$cache = new PhabricatorKeyValueDatabaseCache();
			$conn_w = $cache->establishConnection('w');

			queryfx(
			$conn_w,
			'DELETE FROM %T WHERE cacheExpires < %d
			ORDER BY cacheExpires ASC LIMIT 100',
			$cache->getTableName(),
			PhabricatorTime::getNow());

			return ($conn_w->getAffectedRows() == 100);
			}

			}