PhutilDaemon.php
098bfb44b9f7production

PhutilDaemon.php
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			<?php

			/*
			* Copyright 2011 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.
			*/

			/**
			* Scaffolding for implementing robust background processing scripts.
			*
			* @group daemon
			*/
			class PhutilDaemon {

			private $argv;

			private static $sighandlerInstalled;

			final public function __construct(array $argv) {

			declare(ticks = 1);
			$this->argv = $argv;

			if (!self::$sighandlerInstalled) {
			self::$sighandlerInstalled = true;
			pcntl_signal(SIGINT, __CLASS__.'::__exitOnSignal');
			pcntl_signal(SIGTERM, __CLASS__.'::__exitOnSignal');
			}
			}

			final public function stillWorking() {
			posix_kill(posix_getppid(), SIGUSR1);
			}

			public static function __exitOnSignal($signo) {
			// Normally, PHP doesn't invoke destructors when existing in response to
			// a signal. This forces it to do so, so we have a fighting chance of
			// releasing any locks on our way out.
			exit(128 + $signo);
			}

			final protected function getArgv() {
			return $this->argv;
			}

			final public function execute() {
			$this->willRun();
			$this->run();
			}

			protected function willRun() {

			}

			abstract protected function run();

			}