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<?php |
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declare(ticks = 1); |
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namespace Ackintosh\Snidel\Fork; |
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use Ackintosh\Snidel\ActiveWorkerSet; |
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use Ackintosh\Snidel\Config; |
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use Ackintosh\Snidel\Error; |
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use Ackintosh\Snidel\Pcntl; |
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use Ackintosh\Snidel\QueueFactory; |
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use Ackintosh\Snidel\Worker; |
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class Container |
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{ |
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/** @var int */ |
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private $masterPid; |
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/** @var \Ackintosh\Snidel\Pcntl */ |
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private $pcntl; |
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/** @var \Ackintosh\Snidel\Error */ |
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private $error; |
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/** @var \Ackintosh\Snidel\Task\QueueInterface */ |
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private $taskQueue; |
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/** @var \Ackintosh\Snidel\Result\QueueInterface */ |
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private $resultQueue; |
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/** @var \Ackintosh\Snidel\Log */ |
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private $log; |
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/** @var array */ |
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private $signals = [ |
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SIGTERM, |
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SIGINT, |
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]; |
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/** @var \Ackintosh\Snidel\Config */ |
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private $config; |
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/** @var \Ackintosh\Snidel\QueueFactory */ |
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private $queueFactory; |
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/** @var int */ |
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private $receivedSignal; |
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/** |
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* @param int $ownerPid |
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*/ |
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public function __construct(Config $config, $log) |
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{ |
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$this->log = $log; |
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$this->config = $config; |
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$this->pcntl = new Pcntl(); |
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$this->error = new Error(); |
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$this->queueFactory = new QueueFactory($config); |
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} |
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/** |
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* @param \Ackintosh\Snidel\Task |
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* @return void |
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* @throws \RuntimeException |
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*/ |
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public function enqueue($task) |
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{ |
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try { |
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$this->taskQueue->enqueue($task); |
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} catch (\RuntimeException $e) { |
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throw $e; |
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} |
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} |
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/** |
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* @return int |
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*/ |
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public function queuedCount() |
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{ |
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if (is_null($this->taskQueue)) { |
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return 0; |
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} |
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return $this->taskQueue->queuedCount(); |
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} |
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/** |
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* @return \Ackintosh\Snidel\Result\Result |
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*/ |
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private function dequeue() |
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{ |
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return $this->resultQueue->dequeue(); |
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} |
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/** |
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* @return int |
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*/ |
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public function dequeuedCount() |
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{ |
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if (is_null($this->resultQueue)) { |
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return 0; |
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} |
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return $this->resultQueue->dequeuedCount(); |
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} |
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/** |
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* fork process |
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* |
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* @return \Ackintosh\Snidel\Fork\Fork |
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* @throws \RuntimeException |
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*/ |
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private function fork() |
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{ |
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$pid = $this->pcntl->fork(); |
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if ($pid === -1) { |
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throw new \RuntimeException('could not fork a new process'); |
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} |
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$pid = ($pid === 0) ? getmypid() : $pid; |
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return new Fork($pid); |
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} |
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/** |
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* fork master process |
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* |
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* @return int $masterPid |
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*/ |
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public function forkMaster() |
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{ |
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try { |
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$fork = $this->fork(); |
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} catch (\RuntimeException $e) { |
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throw $e; |
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} |
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$this->masterPid = $fork->getPid(); |
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$this->log->setMasterPid($this->masterPid); |
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if (getmypid() === $this->config->get('ownerPid')) { |
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// owner |
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$this->log->info('pid: ' . getmypid()); |
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$this->taskQueue = $this->queueFactory->createTaskQueue(); |
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$this->resultQueue = $this->queueFactory->createResultQueue(); |
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return $this->masterPid; |
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} else { |
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// master |
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$activeWorkerSet = new ActiveWorkerSet(); |
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$this->log->info('pid: ' . $this->masterPid); |
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foreach ($this->signals as $sig) { |
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$this->pcntl->signal($sig, function ($sig) use ($activeWorkerSet) { |
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$this->receivedSignal = $sig; |
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$this->log->info('received signal: ' . $sig); |
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if ($activeWorkerSet->count() === 0) { |
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$this->log->info('no worker is active.'); |
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} else { |
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$this->log->info('------> sending signal to workers. signal: ' . $sig); |
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$activeWorkerSet->terminate($sig); |
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$this->log->info('<------ sent signal'); |
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} |
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exit; |
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}); |
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} |
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$concurrency = (int)$this->config->get('concurrency'); |
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for ($i = 0; $i < $concurrency; $i++) { |
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$activeWorkerSet->add($this->forkWorker()); |
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} |
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$status = null; |
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while (($workerPid = $this->pcntl->waitpid(-1, $status, WNOHANG)) !== -1) { |
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if ($workerPid === true || $workerPid === 0) { |
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usleep(100000); |
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continue; |
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} |
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$activeWorkerSet->delete($workerPid); |
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$activeWorkerSet->add($this->forkWorker()); |
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$status = null; |
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} |
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exit; |
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} |
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} |
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/** |
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* fork worker process |
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* |
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* @return \Ackintosh\Snidel\Worker |
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* @throws \RuntimeException |
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*/ |
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private function forkWorker() |
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{ |
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try { |
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$fork = $this->fork(); |
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} catch (\RuntimeException $e) { |
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$this->log->error($e->getMessage()); |
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throw $e; |
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} |
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$worker = new Worker($fork); |
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if (getmypid() === $this->masterPid) { |
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// master |
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$this->log->info('forked worker. pid: ' . $worker->getPid()); |
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return $worker; |
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} else { |
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// worker |
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// @codeCoverageIgnoreStart |
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$this->log->info('has forked. pid: ' . getmypid()); |
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foreach ($this->signals as $sig) { |
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$this->pcntl->signal($sig, function ($sig) { |
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$this->receivedSignal = $sig; |
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exit; |
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}, false); |
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} |
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$worker->setTaskQueue($this->queueFactory->createTaskQueue()); |
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$worker->setResultQueue($this->queueFactory->createResultQueue()); |
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register_shutdown_function(function () use ($worker) { |
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if ($worker->isFailedToEnqueueResult() && $this->receivedSignal === null) { |
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$worker->error(); |
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} |
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}); |
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$this->log->info('----> started the function.'); |
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try { |
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$worker->run(); |
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} catch (\RuntimeException $e) { |
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$this->log->error($e->getMessage()); |
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exit; |
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} |
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$this->log->info('<---- completed the function.'); |
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$this->log->info('queued the result and exit.'); |
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exit; |
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// @codeCoverageIgnoreEnd |
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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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public function existsMaster() |
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{ |
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return $this->masterPid !== null; |
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} |
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/** |
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* send signal to master process |
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* |
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* @return void |
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*/ |
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public function sendSignalToMaster($sig = SIGTERM) |
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{ |
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$this->log->info('----> sending signal to master. signal: ' . $sig); |
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posix_kill($this->masterPid, $sig); |
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$this->log->info('<---- sent signal.'); |
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$this->log->info('----> waiting for master shutdown.'); |
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$status = null; |
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$this->pcntl->waitpid($this->masterPid, $status); |
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$this->log->info('<---- master shutdown. status: ' . $status); |
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$this->masterPid = null; |
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} |
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/** |
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* @return void |
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*/ |
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public function wait() |
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{ |
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for (; $this->queuedCount() > $this->dequeuedCount();) { |
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$result = $this->dequeue(); |
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if ($result->isFailure()) { |
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$this->error[$result->getFork()->getPid()] = $result; |
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} |
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} |
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} |
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/** |
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* @return \Generator |
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*/ |
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public function results() |
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{ |
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for (; $this->queuedCount() > $this->dequeuedCount();) { |
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$result = $this->dequeue(); |
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if ($result->isFailure()) { |
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$pid = $result->getFork()->getPid(); |
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$this->error[$pid] = $result; |
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} else { |
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yield $result; |
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} |
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} |
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} |
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298
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/** |
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* @return bool |
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*/ |
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public function hasError() |
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{ |
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return $this->error->exists(); |
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} |
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/** |
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* @return \Ackintosh\Snidel\Error |
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*/ |
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public function getError() |
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{ |
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return $this->error; |
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} |
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public function __destruct() |
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{ |
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unset($this->taskQueue); |
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unset($this->resultQueue); |
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} |
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} |
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This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.
Consider the following example. The parameter
$italy
is not defined by the methodfinale(...)
.The most likely cause is that the parameter was removed, but the annotation was not.