PhabricatorTaskmasterDaemon.php
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	<?php

	/*
	* Copyright 2012 Facebook, Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	final class PhabricatorTaskmasterDaemon extends PhabricatorDaemon {

	public function run() {
	$sleep = 0;
	do {
	$tasks = id(new PhabricatorWorkerLeaseQuery())
	->setLimit(1)
	->execute();

	if ($tasks) {
	foreach ($tasks as $task) {
	$id = $task->getID();
	$class = $task->getTaskClass();

	$this->log("Working on task {$id} ({$class})...");

	$task = $task->executeTask();
	$ex = $task->getExecutionException();
	if ($ex) {
	$this->log("Task {$id} failed!");
	throw $ex;
	} else {
	$this->log("Task {$id} complete! Moved to archive.");
	}
	}

	$sleep = 0;
	} else {
	$sleep = min($sleep + 1, 30);
	}

	$this->sleep($sleep);
	} while (true);
	}

	}