HeraldTranscriptGarbageCollector.php
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	<?php

	final class HeraldTranscriptGarbageCollector
	extends PhabricatorGarbageCollector {

	const COLLECTORCONST = 'herald.transcripts';

	public function getCollectorName() {
	return pht('Herald Transcripts');
	}

	public function getDefaultRetentionPolicy() {
	return phutil_units('30 days in seconds');
	}

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

	queryfx(
	$conn_w,
	'UPDATE %T SET
	objectTranscript = "",
	ruleTranscripts = "",
	conditionTranscripts = "",
	applyTranscripts = "",
	garbageCollected = 1
	WHERE garbageCollected = 0 AND time < %d
	LIMIT 100',
	$table->getTableName(),
	$this->getGarbageEpoch());

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

	}