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<?php declare(strict_types=1); |
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namespace ApiClients\Middleware\Pool; |
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use ApiClients\Foundation\Middleware\Annotation\First; |
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use ApiClients\Foundation\Middleware\Annotation\Last; |
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use ApiClients\Foundation\Middleware\ErrorTrait; |
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use ApiClients\Foundation\Middleware\MiddlewareInterface; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use React\Promise\CancellablePromiseInterface; |
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use function React\Promise\reject; |
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use ResourcePool\Allocation; |
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use ResourcePool\Pool; |
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use function React\Promise\resolve; |
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use Throwable; |
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class PoolMiddleware implements MiddlewareInterface |
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{ |
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/** |
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* @var Allocation[] |
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*/ |
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private $allocations; |
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/** |
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* @param RequestInterface $request |
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* @param array $options |
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* @return CancellablePromiseInterface |
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* |
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* @First() |
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*/ |
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public function pre( |
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RequestInterface $request, |
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string $transactionId, |
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array $options = [] |
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): CancellablePromiseInterface { |
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if (!isset($options[self::class][Options::POOL])) { |
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return resolve($request); |
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} |
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/** @var Pool $pool */ |
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$pool = $options[self::class][Options::POOL]; |
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return $pool->allocateOne()->then(function (Allocation $allocation) use ($request, $transactionId) { |
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$this->allocations[$transactionId] = $allocation; |
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return resolve($request); |
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}); |
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} |
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/** |
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* @param ResponseInterface $response |
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* @param array $options |
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* @return CancellablePromiseInterface |
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* |
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* @Last() |
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*/ |
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public function post( |
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ResponseInterface $response, |
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string $transactionId, |
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array $options = [] |
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): CancellablePromiseInterface { |
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if ($this->allocations[$transactionId] instanceof Allocation) { |
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$this->allocations[$transactionId]->releaseOne(); |
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} |
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return resolve($response); |
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} |
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public function error( |
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Throwable $throwable, |
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string $transactionId, |
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array $options = [] |
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): CancellablePromiseInterface { |
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if ($this->allocations[$transactionId] instanceof Allocation) { |
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$this->allocations[$transactionId]->releaseOne(); |
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} |
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return reject($throwable); |
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} |
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} |
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php-api-clients /
middleware-pool
