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<?php |
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/* |
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* This file is part of Transfer. |
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* |
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* For the full copyright and license information, please view the LICENSE file located |
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* in the root directory. |
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*/ |
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namespace Transfer\Adapter; |
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use Psr\Cache\CacheItemPoolInterface; |
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use Transfer\Adapter\Transaction\Request; |
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use Transfer\Adapter\Transaction\Response; |
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class CacheAdapter implements SourceAdapterInterface |
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{ |
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const HIT = 1; |
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const MISS = 0; |
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/** |
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* @var CacheItemPoolInterface Cache pool |
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*/ |
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private $cachePool; |
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/** |
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* @var SourceAdapterInterface Inner adapter |
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*/ |
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private $adapter; |
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/** |
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* @var callable|null Key generator |
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*/ |
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private $keyGeneratorCallback; |
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/** |
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* @param CacheItemPoolInterface $cachePool Cache pool |
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* @param SourceAdapterInterface $adapter Inner adapter |
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* @param callable $keyGeneratorCallback Key generator |
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*/ |
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public function __construct(CacheItemPoolInterface $cachePool, $adapter, $keyGeneratorCallback = null) |
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{ |
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$this->cachePool = $cachePool; |
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$this->adapter = $adapter; |
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$this->keyGeneratorCallback = $keyGeneratorCallback; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function receive(Request $request) |
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{ |
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if (is_callable($this->keyGeneratorCallback)) { |
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$key = call_user_func_array($this->keyGeneratorCallback, array($request)); |
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} else { |
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$key = md5(serialize($request->getData())); |
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} |
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$item = $this->cachePool->getItem($key); |
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if (!$item->isHit()) { |
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$response = $this->adapter->receive($request); |
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$response->setHeader('cache-status', self::MISS); |
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$response->setHeader('cache-key', $key); |
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$item->set($response); |
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$this->cachePool->save($item); |
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return $response; |
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} |
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/** @var Response $response */ |
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$response = $item->get(); |
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$response->setHeader('cache-status', self::HIT); |
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$response->setHeader('cache-key', $key); |
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$response->setHeader('cache-data', $response->getData()); |
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return $response; |
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} |
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} |
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transfer-framework /
transfer
