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<?php |
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namespace AsyncPHP\Doorman\Manager; |
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use AsyncPHP\Doorman\Cancellable; |
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use AsyncPHP\Doorman\Expires; |
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use AsyncPHP\Doorman\Manager; |
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use AsyncPHP\Doorman\Process; |
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use AsyncPHP\Doorman\Profile; |
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use AsyncPHP\Doorman\Profile\InMemoryProfile; |
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use AsyncPHP\Doorman\Rule; |
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use AsyncPHP\Doorman\Rules; |
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use AsyncPHP\Doorman\Rules\InMemoryRules; |
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use AsyncPHP\Doorman\Shell; |
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use AsyncPHP\Doorman\Shell\BashShell; |
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use AsyncPHP\Doorman\Task; |
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use SplObjectStorage; |
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/** |
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* Class ProcessManager |
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* |
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* @package AsyncPHP\Doorman\Manager |
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*/ |
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class ProcessManager implements Manager |
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{ |
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/** |
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* @var Task[] |
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*/ |
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private $waiting = []; |
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/** |
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* @var Task[] |
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*/ |
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private $running = []; |
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/** |
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* @var null|SplObjectStorage |
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*/ |
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private $timings = null; |
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/** |
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* @var null|string |
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*/ |
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private $logPath; |
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/** |
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* @var null|Rules |
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*/ |
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private $rules; |
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/** |
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* @var null|Shell |
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*/ |
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protected $shell; |
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/** |
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* @var null|string |
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*/ |
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private $binary; |
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/** |
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* @var null|string |
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*/ |
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private $worker; |
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/** |
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* Get a list of the waiting tasks. |
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* |
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* @return array |
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*/ |
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public function getWaiting() |
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{ |
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return $this->waiting; |
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} |
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/** |
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* Get a list of the running tasks. |
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* |
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* @return array |
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*/ |
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public function getRunning() |
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{ |
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return $this->running; |
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} |
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/** |
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* @inheritdoc |
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* |
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* @param Task $task |
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* |
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* @return $this |
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*/ |
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public function addTask(Task $task) |
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{ |
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$this->waiting[] = $task; |
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return $this; |
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} |
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/** |
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* @inheritdoc |
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* |
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* @return bool |
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*/ |
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public function tick() |
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{ |
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if (!$this->timings instanceof SplObjectStorage) { |
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$this->timings = new SplObjectStorage(); |
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} |
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$waiting = []; |
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$running = []; |
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foreach ($this->waiting as $task) { |
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if ($this->isTaskCancelled($task)) { |
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continue; |
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} |
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if (!$this->canRunTask($task)) { |
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$waiting[] = $task; |
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continue; |
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} |
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if ($task->stopsSiblings()) { |
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$this->stopSiblingTasks($task); |
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} |
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$binary = $this->getBinary(); |
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$worker = $this->getWorker(); |
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$stdout = $this->getStdOut(); |
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$stderr = $this->getStdErr(); |
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if ($task instanceof Expires) { |
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$this->timings[$task] = time(); |
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} |
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$command = $this->getCommand($binary, $worker, $stdout, $stderr); |
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$output = $this->getShell()->exec($command, [ |
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$this->getTaskString($task), |
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]); |
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if ($task instanceof Process) { |
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$task->setId($output[0]); |
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} |
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$this->running[] = $task; |
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} |
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foreach ($this->running as $task) { |
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if (!$this->canRemoveTask($task)) { |
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$running[] = $task; |
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} |
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} |
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$this->waiting = $waiting; |
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$this->running = $running; |
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return !empty($waiting) || !empty($running); |
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} |
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/** |
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* Assemble the command |
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* this can be used to customise command by subclassing and overwriting this function |
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* |
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* @param string $binary |
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* @param string $worker |
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* @param string $stdout |
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* @param string $stderr |
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* @return string |
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*/ |
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protected function getCommand($binary, $worker, $stdout, $stderr) |
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{ |
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return "{$binary} {$worker} %s {$stdout} {$stderr} & echo $!"; |
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} |
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/** |
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* Stops sibling processes of a task. |
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* |
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* @param Task $task |
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* |
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* @return $this |
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*/ |
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private function stopSiblingTasks(Task $task) |
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{ |
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$handler = $task->getHandler(); |
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$stdout = $this->getStdOut(); |
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$stderr = $this->getStdErr(); |
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foreach ($this->running as $task) { |
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if ($task->getHandler() === $handler && $task instanceof Process) { |
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$this->getShell()->exec("kill -9 %s {$stdout} {$stderr} &", [ |
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$task->getId(), |
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]); |
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} |
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} |
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return $this; |
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} |
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/** |
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* Checks whether a new task can be run. |
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* |
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* @param Task $task |
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* |
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* @return bool |
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*/ |
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private function canRunTask(Task $task) |
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{ |
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if (!$task->canRunTask()) { |
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return false; |
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} |
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if ($task->ignoresRules()) { |
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return true; |
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} |
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$processes = array_filter($this->running, function (Task $task) { |
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return $task instanceof Process; |
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}); |
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if (count($processes) < 1) { |
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return true; |
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} |
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$profile = $this->getProfileForProcesses($task, $processes); |
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return $this->getRules()->canRunTask($task, $profile); |
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} |
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/** |
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* Gets the load profile related to a task. |
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* |
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* @param Task $task |
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* @param array $processes |
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* |
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* @return Profile |
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*/ |
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private function getProfileForProcesses(Task $task, array $processes) |
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{ |
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$stats = $this->getStatsForProcesses($processes); |
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$siblingProcesses = array_filter($processes, function (Task $next) use ($task) { |
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return $next->getHandler() === $task->getHandler(); |
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}); |
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$siblingStats = $this->getStatsForProcesses($siblingProcesses); |
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$profile = $this->newProfile(); |
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$profile->setProcesses($processes); |
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$profile->setProcessorLoad(min(100, array_sum(array_column($stats, 1)))); |
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$profile->setMemoryLoad(min(100, array_sum(array_column($stats, 2)))); |
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$profile->setSiblingProcesses($siblingProcesses); |
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$profile->setSiblingProcessorLoad(min(100, array_sum(array_column($siblingStats, 1)))); |
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$profile->setSiblingMemoryLoad(min(100, array_sum(array_column($siblingStats, 2)))); |
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return $profile; |
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} |
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/** |
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* Gets processor and memory stats for a list of processes. |
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* |
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* @param Process[] $processes |
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* |
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* @return array |
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*/ |
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private function getStatsForProcesses(array $processes) |
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{ |
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$stats = []; |
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foreach ($processes as $process) { |
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$output = $this->getShell()->exec("ps -o pid,%%cpu,%%mem,state,start -p %s | sed 1d", [ |
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$process->getId(), |
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]); |
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if (count($output) < 1) { |
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continue; |
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} |
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$last = $output[count($output) - 1]; |
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if (trim($last) === "") { |
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continue; |
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} |
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288
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$parts = preg_split("/\s+/", trim($last)); |
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$pid = intval($parts[0]); |
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292
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if ("{$pid}" !== $parts[0]) { |
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continue; |
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} |
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$stats[] = $parts; |
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} |
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return $stats; |
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} |
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302
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/** |
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* Gets or creates a Shell instance. |
304
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* |
305
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* @return Shell |
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*/ |
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public function getShell() |
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{ |
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2 |
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if ($this->shell === null) { |
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$this->shell = $this->newShell(); |
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} |
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313
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return $this->shell; |
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} |
315
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316
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/** |
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* @param Shell $shell |
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* |
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* @return $this |
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*/ |
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public function setShell(Shell $shell) |
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{ |
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$this->shell = $shell; |
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325
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return $this; |
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} |
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328
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/** |
329
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* Creates a new Shell instance. |
330
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* |
331
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* @return Shell |
332
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*/ |
333
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2 |
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private function newShell() |
334
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{ |
335
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2 |
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return new BashShell(); |
336
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} |
337
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338
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/** |
339
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* Creates a new Profile instance. |
340
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* |
341
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* @return Profile |
342
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*/ |
343
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1 |
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private function newProfile() |
344
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{ |
345
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1 |
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return new InMemoryProfile(); |
346
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} |
347
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348
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/** |
349
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* Gets or creates a new Rules instance. |
350
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* |
351
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* @return Rules |
352
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*/ |
353
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2 |
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public function getRules() |
354
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{ |
355
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2 |
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if ($this->rules === null) { |
356
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2 |
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$this->rules = $this->newRules(); |
357
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2 |
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} |
358
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359
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2 |
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return $this->rules; |
360
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} |
361
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362
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/** |
363
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* @param Rules $rules |
364
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* |
365
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* @return $this |
366
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*/ |
367
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1 |
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public function setRules(Rules $rules) |
368
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{ |
369
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1 |
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$this->rules = $rules; |
370
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371
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1 |
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return $this; |
372
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} |
373
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374
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/** |
375
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* Creates a new Rules instance. |
376
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* |
377
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* @return Rules |
378
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*/ |
379
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2 |
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private function newRules() |
380
|
|
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{ |
381
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2 |
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return new InMemoryRules(); |
382
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} |
383
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|
|
384
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|
/** |
385
|
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* @param string $binary |
386
|
|
|
* |
387
|
|
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* @return $this |
388
|
|
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*/ |
389
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|
|
public function setBinary($binary) |
390
|
|
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{ |
391
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$this->binary = $binary; |
392
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|
|
|
393
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return $this; |
394
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|
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} |
395
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|
|
|
396
|
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|
/** |
397
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* Gets the path of the PHP runtime. |
398
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|
|
* |
399
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|
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* @return string |
400
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|
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*/ |
401
|
1 |
|
public function getBinary() |
402
|
|
|
{ |
403
|
1 |
|
if ($this->binary === null) { |
404
|
1 |
|
$this->binary = PHP_BINDIR . "/php"; |
405
|
1 |
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} |
406
|
|
|
|
407
|
1 |
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return $this->binary; |
408
|
|
|
} |
409
|
|
|
|
410
|
|
|
/** |
411
|
|
|
* @param string $worker |
412
|
|
|
* |
413
|
|
|
* @return $this |
414
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|
|
*/ |
415
|
|
|
public function setWorker($worker) |
416
|
|
|
{ |
417
|
|
|
$this->worker = $worker; |
418
|
|
|
|
419
|
|
|
return $this; |
420
|
|
|
} |
421
|
|
|
|
422
|
|
|
/** |
423
|
|
|
* Gets the path of the worker script. |
424
|
|
|
* |
425
|
|
|
* @return string |
426
|
|
|
*/ |
427
|
1 |
|
public function getWorker() |
428
|
|
|
{ |
429
|
1 |
|
if ($this->worker === null) { |
430
|
1 |
|
$this->worker = realpath(__DIR__ . "/../../bin/worker.php"); |
431
|
1 |
|
} |
432
|
|
|
|
433
|
1 |
|
return $this->worker; |
434
|
|
|
} |
435
|
|
|
|
436
|
|
|
/** |
437
|
|
|
* Gets the path to write stdout to. |
438
|
|
|
* |
439
|
|
|
* @return string |
440
|
|
|
*/ |
441
|
1 |
|
private function getStdOut() |
442
|
|
|
{ |
443
|
1 |
|
if ($this->getLogPath() !== null) { |
444
|
|
|
return ">> " . $this->getLogPath() . "/stdout.log"; |
445
|
|
|
} |
446
|
|
|
|
447
|
1 |
|
return "> /dev/null"; |
448
|
|
|
} |
449
|
|
|
|
450
|
|
|
/** |
451
|
|
|
* @return null|string |
452
|
|
|
*/ |
453
|
2 |
|
public function getLogPath() |
454
|
|
|
{ |
455
|
2 |
|
return $this->logPath; |
456
|
|
|
} |
457
|
|
|
|
458
|
|
|
/** |
459
|
|
|
* @param string $logPath |
460
|
|
|
* |
461
|
|
|
* @return $this |
462
|
|
|
*/ |
463
|
1 |
|
public function setLogPath($logPath) |
464
|
|
|
{ |
465
|
1 |
|
$this->logPath = $logPath; |
466
|
|
|
|
467
|
1 |
|
return $this; |
468
|
|
|
} |
469
|
|
|
|
470
|
|
|
/** |
471
|
|
|
* Gets the path to write stderr to. |
472
|
|
|
* |
473
|
|
|
* @return string |
474
|
|
|
*/ |
475
|
1 |
|
private function getStdErr() |
476
|
|
|
{ |
477
|
1 |
|
if ($this->getLogPath() !== null) { |
478
|
|
|
return "2>> " . $this->getLogPath() . "/stderr.log"; |
479
|
|
|
} |
480
|
|
|
|
481
|
1 |
|
return "2> /dev/null"; |
482
|
|
|
} |
483
|
|
|
|
484
|
|
|
/** |
485
|
|
|
* Gets a string representation of a task, to pass to the worker script. |
486
|
|
|
* |
487
|
|
|
* @param Task $task |
488
|
|
|
* |
489
|
|
|
* @return string |
490
|
|
|
*/ |
491
|
1 |
|
private function getTaskString(Task $task) |
492
|
|
|
{ |
493
|
1 |
|
return base64_encode(serialize($task)); |
494
|
|
|
} |
495
|
|
|
|
496
|
|
|
/** |
497
|
|
|
* Checks whether a task can be removed from the list of running processes. |
498
|
|
|
* |
499
|
|
|
* @param Task $task |
500
|
|
|
* |
501
|
|
|
* @return bool |
502
|
|
|
*/ |
503
|
1 |
|
private function canRemoveTask(Task $task) |
504
|
|
|
{ |
505
|
1 |
|
if (!$task instanceof Process) { |
506
|
|
|
return true; |
507
|
|
|
} |
508
|
|
|
|
509
|
1 |
|
if ($this->isTaskExpired($task) || $this->isTaskCancelled($task)) { |
510
|
|
|
$this->killTask($task); |
511
|
|
|
return true; |
512
|
|
|
} |
513
|
|
|
|
514
|
1 |
|
$processes = array_filter($this->running, function (Task $task) { |
515
|
1 |
|
return $task instanceof Process; |
516
|
1 |
|
}); |
517
|
|
|
|
518
|
1 |
|
if (count($processes) < 1) { |
519
|
|
|
return true; |
520
|
|
|
} |
521
|
|
|
|
522
|
1 |
|
$found = false; |
523
|
1 |
|
$stats = $this->getStatsForProcesses($processes); |
524
|
|
|
|
525
|
1 |
|
foreach ($stats as $stat) { |
526
|
1 |
|
if ($stat[0] === $task->getId()) { |
527
|
1 |
|
$found = true; |
528
|
1 |
|
} |
529
|
1 |
|
} |
530
|
|
|
|
531
|
1 |
|
return !$found; |
532
|
|
|
} |
533
|
|
|
|
534
|
|
|
/** |
535
|
|
|
* Check if the given task is expired |
536
|
|
|
* |
537
|
|
|
* @param Task $task |
538
|
|
|
* |
539
|
|
|
* @return boolean |
540
|
|
|
*/ |
541
|
1 |
|
private function isTaskExpired(Task $task) |
542
|
|
|
{ |
543
|
1 |
|
if ($task instanceof Expires) { |
544
|
1 |
|
$expiresIn = $task->getExpiresIn(); |
545
|
1 |
|
$startedAt = $this->timings[$task]; |
546
|
|
|
|
547
|
1 |
|
if ($expiresIn > 0 && (time() - $startedAt) >= $expiresIn) { |
548
|
|
|
return $task->shouldExpire($startedAt); |
549
|
|
|
} |
550
|
1 |
|
} |
551
|
|
|
|
552
|
1 |
|
return false; |
553
|
|
|
} |
554
|
|
|
|
555
|
|
|
/** |
556
|
|
|
* Check if the given task is cancelled. |
557
|
|
|
* |
558
|
|
|
* @param Task $task |
559
|
|
|
* |
560
|
|
|
* @return bool |
561
|
|
|
*/ |
562
|
1 |
|
private function isTaskCancelled(Task $task) |
563
|
|
|
{ |
564
|
1 |
|
if ($task instanceof Cancellable) { |
565
|
|
|
return $task->isCancelled(); |
566
|
|
|
} |
567
|
|
|
|
568
|
1 |
|
return false; |
569
|
|
|
} |
570
|
|
|
|
571
|
|
|
/** |
572
|
|
|
* Revoke any background processes attached to this task. |
573
|
|
|
* |
574
|
|
|
* @param Task $task |
575
|
|
|
* |
576
|
|
|
* @return bool |
577
|
|
|
*/ |
578
|
|
|
private function killTask(Task $task) |
579
|
|
|
{ |
580
|
|
|
if ($task instanceof Process) { |
581
|
|
|
$stdout = $this->getStdOut(); |
582
|
|
|
$stderr = $this->getStdErr(); |
583
|
|
|
|
584
|
|
|
$this->getShell()->exec("kill -9 %s {$stdout} {$stderr} &", [ |
585
|
|
|
$task->getId(), |
586
|
|
|
]); |
587
|
|
|
|
588
|
|
|
return true; |
589
|
|
|
} |
590
|
|
|
|
591
|
|
|
return false; |
592
|
|
|
} |
593
|
|
|
|
594
|
|
|
/** |
595
|
|
|
* @param Rule $rule |
596
|
|
|
* |
597
|
|
|
* @return $this |
598
|
|
|
*/ |
599
|
1 |
|
public function addRule(Rule $rule) |
600
|
|
|
{ |
601
|
1 |
|
$this->getRules()->addRule($rule); |
602
|
|
|
|
603
|
1 |
|
return $this; |
604
|
|
|
} |
605
|
|
|
|
606
|
|
|
/** |
607
|
|
|
* @param Rule $rule |
608
|
|
|
* |
609
|
|
|
* @return $this |
610
|
|
|
*/ |
611
|
1 |
|
public function removeRule(Rule $rule) |
612
|
|
|
{ |
613
|
1 |
|
$this->getRules()->removeRule($rule); |
614
|
|
|
|
615
|
1 |
|
return $this; |
616
|
|
|
} |
617
|
|
|
|
618
|
|
|
public function __destruct() |
619
|
|
|
{ |
620
|
|
|
foreach ($this->running as $task) { |
621
|
|
|
$this->killTask($task); |
622
|
|
|
} |
623
|
|
|
} |
624
|
|
|
} |
625
|
|
|
|