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<?php |
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namespace Gielfeldt\SimpleWorker; |
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/** |
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* Class Pool |
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* |
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* @package Gielfeldt\SimpleWorker |
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*/ |
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class Pool |
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{ |
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/** |
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* Workers in the pool. |
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* @var array |
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*/ |
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protected $workers = []; |
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/** |
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* Options for the pool. |
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* @var array |
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*/ |
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protected $options; |
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/** |
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* Pool singletons. |
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* @var Pool[] |
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*/ |
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static protected $pools = []; |
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/** |
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* Pool constructor. |
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* |
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* @param array $options |
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* Options for the pool. |
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* - concurrency |
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* - polling_interval |
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*/ |
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public function __construct(array $options = array()) |
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{ |
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$this->options = $options + [ |
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'concurrency' => 5, |
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'polling_interval' => 0.1, |
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'progress_callback' => null, |
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'finish_callback' => null, |
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]; |
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} |
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/** |
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* Get a singleton pool. |
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* |
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* @param string $name |
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* Name of pool. |
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* @param array $options |
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* Options for the pool. |
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* |
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* @return \Gielfeldt\SimpleWorker\Pool |
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*/ |
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public static function get($name, array $options = array()) |
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{ |
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if (!isset(static::$pools[$name])) { |
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static::$pools[$name] = new static($options); |
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} |
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return static::$pools[$name]; |
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} |
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/** |
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* Add a worker to the pool. |
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* |
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* @param \Gielfeldt\SimpleWorker\SimpleWorkerInterface $worker |
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* The worker to add. |
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* @param $callback |
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* The callback to fire when ready. |
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*/ |
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public function addWorker(SimpleWorkerInterface $worker, $callback) |
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{ |
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$this->workers[] = [$worker, $callback]; |
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} |
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/** |
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* Add multiple workers to the pool. |
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* |
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* @param \Gielfeldt\SimpleWorker\SimpleWorkerInterface[] $workers |
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* The worker to add. |
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* @param $callback |
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* The callback to fire when ready. |
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*/ |
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public function addWorkers(array $workers, $callback) |
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{ |
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foreach ($workers as $worker) { |
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$this->addWorker($worker, $callback); |
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} |
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} |
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/** |
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* Process workers. |
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*/ |
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public function process(array $options = array()) |
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{ |
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$options += $this->options; |
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while (!empty($this->workers)) { |
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$skipSleep = false; |
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foreach ($this->workers as $idx => $worker) { |
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if ($idx >= $options['concurrency']) { |
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break; |
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} |
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try { |
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if ($worker[0]->isReady()) { |
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call_user_func($worker[1], $worker[0]); |
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unset($this->workers[$idx]); |
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$this->workers = array_values($this->workers); |
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$skipSleep = true; |
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break; |
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} |
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} catch (\Exception $e) { |
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// Remove worker from pool if exception occurred. |
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unset($this->workers[$idx]); |
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throw $e; |
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} |
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} |
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if ($options['progress_callback']) { |
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call_user_func($options['progress_callback'], $this); |
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} |
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if (!$skipSleep && $options['polling_interval'] > 0) { |
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usleep($options['polling_interval'] * 1000000); |
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} |
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} |
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3 |
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if ($options['finish_callback']) { |
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1 |
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call_user_func($options['finish_callback'], $this); |
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1 |
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} |
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3 |
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} |
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} |
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gielfeldt /
simple-worker
