FeedStoryNotificationGarbageCollector.php
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	<?php

	final class FeedStoryNotificationGarbageCollector
	extends PhabricatorGarbageCollector {

	const COLLECTORCONST = 'feed.notifications';

	public function getCollectorName() {
	return pht('Notifications');
	}

	public function getDefaultRetentionPolicy() {
	return phutil_units('90 days in seconds');
	}

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

	queryfx(
	$conn_w,
	'DELETE FROM %T WHERE chronologicalKey < (%d << 32)
	ORDER BY chronologicalKey ASC LIMIT 100',
	$table->getTableName(),
	$this->getGarbageEpoch());

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

	}