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PhabricatorDaemonTaskGarbageCollector.php
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			<?php

			final class PhabricatorDaemonTaskGarbageCollector
			extends PhabricatorGarbageCollector {

			const COLLECTORCONST = 'worker.tasks';

			public function getCollectorName() {
			return pht('Archived Tasks');
			}

			public function getDefaultRetentionPolicy() {
			return phutil_units('14 days in seconds');
			}

			protected function collectGarbage() {
			$table = new PhabricatorWorkerArchiveTask();
			$data_table = new PhabricatorWorkerTaskData();
			$conn_w = $table->establishConnection('w');

			$tasks = id(new PhabricatorWorkerArchiveTaskQuery())
			->withDateCreatedBefore($this->getGarbageEpoch())
			->setLimit(100)
			->execute();
			if (!$tasks) {
			return false;
			}

			$data_ids = array_filter(mpull($tasks, 'getDataID'));
			$task_ids = mpull($tasks, 'getID');

			$table->openTransaction();
			if ($data_ids) {
			queryfx(
			$conn_w,
			'DELETE FROM %T WHERE id IN (%Ld)',
			$data_table->getTableName(),
			$data_ids);
			}
			queryfx(
			$conn_w,
			'DELETE FROM %T WHERE id IN (%Ld)',
			$table->getTableName(),
			$task_ids);
			$table->saveTransaction();

			return (count($task_ids) == 100);
			}

			}