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<?php |
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namespace Extraload\Pipeline; |
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use Extraload\Extractor\ExtractorInterface; |
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use Extraload\Transformer\TransformerInterface; |
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use Extraload\Loader\LoaderInterface; |
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use Extraload\Events; |
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use Symfony\Component\EventDispatcher\EventDispatcherInterface; |
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use Symfony\Component\EventDispatcher\GenericEvent; |
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class DefaultPipeline implements PipelineInterface |
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{ |
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private $extractor; |
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private $transformer; |
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private $loader; |
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private $eventDispatcher; |
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public function __construct( |
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ExtractorInterface $extractor, |
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TransformerInterface $transformer, |
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LoaderInterface $loader, |
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EventDispatcherInterface $eventDispatcher = null |
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) { |
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$this->extractor = $extractor; |
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$this->transformer = $transformer; |
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$this->loader = $loader; |
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$this->eventDispatcher = $eventDispatcher; |
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} |
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public function process() |
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{ |
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$this->dispatch(Events::PRE_PROCESS); |
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while (null !== $extracted = $this->extractor->extract()) { |
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$this->dispatch(Events::EXTRACT, $extracted); |
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$transformed = $this->transformer->transform($extracted); |
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$this->dispatch(Events::TRANSFORM, $transformed); |
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if (null === $transformed) { |
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continue; |
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} |
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$this->loader->load($transformed); |
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$this->dispatch(Events::LOAD, $transformed); |
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} |
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$this->loader->flush(); |
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$this->dispatch(Events::POST_PROCESS); |
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} |
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private function dispatch($name, $subject = null) |
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{ |
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if (null === $this->eventDispatcher) { |
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return; |
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} |
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$this->eventDispatcher->dispatch($name, new GenericEvent($subject)); |
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} |
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} |
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umpirsky /
Extraload
