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<?php |
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namespace dmank\gearman\event\subscriber; |
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use dmank\gearman\event\WorkerEvent; |
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use Psr\Log\LoggerInterface; |
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use Symfony\Component\EventDispatcher\EventSubscriberInterface; |
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class MemoryLimit implements EventSubscriberInterface |
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{ |
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private $maxMemoryLimit; |
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/** |
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* @var LoggerInterface |
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*/ |
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private $logger; |
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public function __construct($maxMemoryLimit = -1, LoggerInterface $logger = null) |
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{ |
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$this->maxMemoryLimit = $maxMemoryLimit; |
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$this->logger = $logger; |
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} |
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public static function getSubscribedEvents() |
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{ |
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return array( |
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WorkerEvent::EVENT_AFTER_RUN => array('onAfterRun'), |
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WorkerEvent::EVENT_BEFORE_RUN => array('onBeforeRun') |
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); |
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} |
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public function onBeforeRun(WorkerEvent $event) |
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{ |
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if (!is_null($this->logger) && $this->maxMemoryLimit != '-1') { |
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$this->logger->notice( |
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sprintf( |
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'i will stop the worker when the memory limit of %s is exceeded.', |
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$this->maxMemoryLimit |
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) |
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); |
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} |
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} |
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public function onAfterRun(WorkerEvent $event) |
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{ |
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if ($this->memoryLimitAlmostExceeded()) { |
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$this->informLogger(); |
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$event->getWorkerInstance()->destroyWorker(); |
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} |
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} |
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/** |
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* @return bool |
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*/ |
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private function memoryLimitAlmostExceeded() |
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{ |
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return ( |
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$this->maxMemoryLimit != '-1' && |
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memory_get_usage(true) * 1.2 > $this->returnBytes($this->maxMemoryLimit) |
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); |
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} |
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/** |
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* @param $value |
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* @return int |
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*/ |
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private function returnBytes($value) |
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{ |
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$value = trim($value); |
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$last = strtolower($value{strlen($value) - 1}); |
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switch ($last) { |
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case 'g': |
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$value *= 1024; |
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case 'm': |
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$value *= 1024; |
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case 'k': |
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$value *= 1024; |
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} |
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return $value; |
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} |
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private function informLogger() |
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{ |
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if (!is_null($this->logger)) { |
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$this->logger->notice( |
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sprintf( |
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'Memory limit almost exceeded. Max limit is %s, used %s so far.', |
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$this->maxMemoryLimit, |
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round((memory_get_usage(true) * 1.2) / 1048576, 2) . 'M' |
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) |
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); |
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} |
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1 |
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} |
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} |
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dominikmank /
gearman
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This check looks from parameters that have been defined for a function or method, but which are not used in the method body.