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<?php |
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/** |
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* This file is part of tenside/core-bundle. |
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* |
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* (c) Christian Schiffler <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* This project is provided in good faith and hope to be usable by anyone. |
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* |
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* @package tenside/core-bundle |
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* @author Christian Schiffler <[email protected]> |
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* @copyright 2015 Christian Schiffler <[email protected]> |
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* @license https://github.com/tenside/core-bundle/blob/master/LICENSE MIT |
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* @link https://github.com/tenside/core-bundle |
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* @filesource |
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*/ |
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namespace Tenside\CoreBundle\Command; |
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use Psr\Log\LoggerInterface; |
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use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand; |
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use Symfony\Component\Console\Input\InputArgument; |
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use Symfony\Component\Console\Input\InputInterface; |
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use Symfony\Component\Console\Output\OutputInterface; |
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use Tenside\Core\Task\Runner; |
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use Tenside\Core\Util\FunctionAvailabilityCheck; |
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/** |
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* This class executes a queued task in detached mode. |
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*/ |
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class RunTaskCommand extends ContainerAwareCommand |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function configure() |
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{ |
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$this |
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->setName('tenside:runtask') |
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->setDescription('Execute a queued task') |
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->setHelp('You most likely do not want to use this from CLI - use the web UI') |
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->addArgument('taskId', InputArgument::REQUIRED, 'The task id of the task to run.'); |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @throws \RuntimeException When another task is already running. |
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*/ |
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public function run(InputInterface $input, OutputInterface $output) |
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{ |
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// If successfully forked, exit now as the parenting process is done. |
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if ($this->fork()) { |
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$output->writeln('Forked into background.'); |
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return 0; |
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} |
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return parent::run($input, $output); |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @throws \InvalidArgumentException When an invalid task id has been passed. |
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*/ |
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protected function execute(InputInterface $input, OutputInterface $output) |
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{ |
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$container = $this->getContainer(); |
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$taskList = $container->get('tenside.tasks'); |
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$task = $taskList->getTask($input->getArgument('taskId')); |
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if (!$task) { |
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throw new \InvalidArgumentException('Task not found: ' . $input->getArgument('taskId')); |
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} |
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$runner = new Runner($task, $container->get('tenside.taskrun_lock'), $container->get('logger')); |
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return $runner->run( |
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$container->get('kernel')->getLogDir() . DIRECTORY_SEPARATOR . 'task-' . $task->getId() . '.log' |
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) ? 0 : 1; |
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} |
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/** |
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* Try to fork. |
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* |
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* The return value determines if the caller shall exit (when forking was successful and it is the forking process) |
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* or rather proceed execution (is the fork or unable to fork). |
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* |
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* True means exit, false means go on in this process. |
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* |
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* @return bool |
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* |
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* @throws \RuntimeException When the forking caused an error. |
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*/ |
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private function fork() |
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{ |
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/** @var LoggerInterface $logger */ |
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$logger = $this->getContainer()->get('logger'); |
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if (!$this->getContainer()->get('tenside.config')->isForkingAvailable()) { |
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$logger->warning('Forking disabled by configuration, execution will block until the command has finished.'); |
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return false; |
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} elseif (!FunctionAvailabilityCheck::isFunctionEnabled('pcntl_fork', 'pcntl')) { |
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$logger->warning('pcntl_fork() is not available, execution will block until the command has finished.'); |
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return false; |
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} else { |
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$pid = pcntl_fork(); |
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if (-1 === $pid) { |
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throw new \RuntimeException('pcntl_fork() returned -1.'); |
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} elseif (0 !== $pid) { |
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// Tell the calling method to exit now. |
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$logger->info('Forked process ' . posix_getpid() . ' to pid ' . $pid); |
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return true; |
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} |
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$logger->info('Processing task in forked process with pid ' . posix_getpid()); |
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return false; |
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} |
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} |
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} |
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tenside /
core-bundle
