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<?php |
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namespace Scheduler\Worker; |
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use DateInterval; |
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use DateTime; |
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use Scheduler\Exception\SchedulerException; |
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use Scheduler\JobRunner\JobRunnerInterface; |
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use Scheduler\SchedulerInterface; |
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/** |
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* Class AbstractWorker |
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* @package Scheduler\Worker |
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* @author Aleh Hutnikau, <[email protected]> |
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*/ |
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abstract class AbstractWorker implements WorkerInterface |
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{ |
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const DEFAULT_ITERATION_INTERVAL = 'PT60S'; |
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/** @var DateTime */ |
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private $from; |
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/** @var DateInterval */ |
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private $interval; |
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/** @var bool */ |
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private $shutdown = false; |
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/** @var integer */ |
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private $iteration = 0; |
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/** @var integer */ |
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private $maxIterations = 1000; |
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/** |
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* @param integer $startTime |
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* @param string $interval |
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* @return mixed|string |
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* @throws SchedulerException |
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*/ |
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public function run($startTime, $interval) |
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{ |
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$this->init([$startTime, $interval]); |
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$jobRunner = $this->getJobRunner(); |
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$from = clone($this->from); |
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while ($this->isRunning()) { |
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$to = new DateTime('now', new \DateTimeZone('UTC')); |
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$jobRunner->run($this->getScheduler(), $from, $to, true); |
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$from = clone($to); |
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sleep($this->getSeconds($this->interval)); |
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$this->iteration++; |
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} |
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return 'Shut down scheduler worker'; |
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} |
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/** |
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* @return JobRunnerInterface |
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*/ |
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abstract protected function getJobRunner(); |
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/** |
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* @return SchedulerInterface |
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*/ |
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abstract protected function getScheduler(); |
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/** |
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* @return bool |
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*/ |
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public function isRunning() |
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{ |
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1 |
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pcntl_signal_dispatch(); |
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if ($this->iteration >= $this->getMaxIterations()) { |
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$this->shutdown(); |
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} |
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if ($this->shutdown) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Set marker to shutdown after finishing current iteration |
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*/ |
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public function shutdown() |
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{ |
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$this->shutdown = true; |
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} |
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/** |
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* @param $iterations |
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* @throws SchedulerException |
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* @return mixed|void |
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*/ |
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public function setMaxIterations($iterations) |
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{ |
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if (!is_integer($iterations)) { |
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throw new SchedulerException('$iterations parameter must be integer'); |
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} |
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$this->maxIterations = $iterations; |
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} |
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/** |
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* Get amount of seconds in date interval |
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* |
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* @param DateInterval $interval |
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* @return int |
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* @throws \Exception |
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*/ |
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private function getSeconds(DateInterval $interval) |
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{ |
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$date = new \DateTimeImmutable('now', new \DateTimeZone('UTC')); |
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$date2 = $date->add($interval); |
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return $date2->getTimestamp() - $date->getTimestamp(); |
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} |
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/** |
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* @param array $params |
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* @throws |
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*/ |
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private function init($params = []) |
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{ |
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if (!isset($params[0]) || !is_numeric($params[0])) { |
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throw new SchedulerException('Start time parameter must be numeric'); |
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} |
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$this->from = new DateTime('@' . $params[0], new \DateTimeZone('UTC')); |
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$this->interval = new \DateInterval(self::DEFAULT_ITERATION_INTERVAL); |
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if (isset($params[1])) { |
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$this->interval = new \DateInterval($params[1]); |
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} |
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$this->registerSigHandlers(); |
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} |
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/** |
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* Register signal handlers that a worker should respond to. |
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* |
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* TERM/INT/QUIT: Shutdown after the current job is finished then exit. |
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*/ |
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private function registerSigHandlers() |
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{ |
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if (!function_exists('pcntl_signal')) { |
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//worker ran without pcntl |
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function pcntl_signal() { |
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//do nothing |
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} |
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define('SIGTERM', 15); |
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define('SIGINT', 2); |
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define('SIGQUIT', 3); |
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} |
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1 |
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if (!function_exists('pcntl_signal_dispatch')) { |
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function pcntl_signal_dispatch() { |
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//do nothing |
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}; |
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} |
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declare(ticks = 1); |
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pcntl_signal(SIGTERM, [$this, 'shutdown']); |
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pcntl_signal(SIGINT, [$this, 'shutdown']); |
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pcntl_signal(SIGQUIT, [$this, 'shutdown']); |
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} |
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/** |
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* @return integer |
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*/ |
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173
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1 |
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public function getMaxIterations() |
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{ |
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1 |
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return $this->maxIterations; |
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} |
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} |
hutnikau /
job-scheduler
Adding explicit visibility (
private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.