DifferentialParseCacheGarbageCollector.php
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	<?php

	final class DifferentialParseCacheGarbageCollector
	extends PhabricatorGarbageCollector {

	public function collectGarbage() {
	$key = 'gcdaemon.ttl.differential-parse-cache';
	$ttl = PhabricatorEnv::getEnvConfig($key);
	if ($ttl <= 0) {
	return false;
	}

	$table = new DifferentialChangeset();
	$conn_w = $table->establishConnection('w');

	queryfx(
	$conn_w,
	'DELETE FROM %T WHERE dateCreated < %d LIMIT 100',
	DifferentialChangeset::TABLE_CACHE,
	time() - $ttl);

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

	}