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<?php |
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namespace Http\Client\Common; |
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use Http\Client\HttpAsyncClient; |
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use Http\Client\HttpClient; |
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use Psr\Http\Message\RequestInterface; |
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use Http\Client\Exception; |
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/** |
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* A HttpClientPoolItem represent a HttpClient inside a Pool. |
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* |
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* It is disabled when a request failed and can be reenable after a certain number of seconds |
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* It also keep tracks of the current number of request the client is currently sending (only usable for async method) |
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* |
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* @author Joel Wurtz <[email protected]> |
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*/ |
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class HttpClientPoolItem implements HttpClient, HttpAsyncClient |
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{ |
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/** @var int Number of request this client is currently sending */ |
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private $sendingRequestCount = 0; |
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/** @var \DateTime|null Time when this client has been disabled or null if enable */ |
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private $disabledAt; |
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/** @var int|null Number of seconds after this client is reenable, by default null: never reenable this client */ |
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private $reenableAfter; |
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/** @var FlexibleHttpClient A http client responding to async and sync request */ |
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private $client; |
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/** |
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* {@inheritdoc} |
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* |
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* @param null|int $reenableAfter Number of seconds after this client is reenable |
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*/ |
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public function __construct($client, $reenableAfter = null) |
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{ |
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$this->client = new FlexibleHttpClient($client); |
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$this->reenableAfter = $reenableAfter; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function sendRequest(RequestInterface $request) |
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{ |
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if ($this->isDisabled()) { |
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throw new Exception\RequestException('Cannot send the request as this client has been disabled', $request); |
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} |
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try { |
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$this->incrementRequestCount(); |
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$response = $this->client->sendRequest($request); |
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$this->decrementRequestCount(); |
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} catch (Exception $e) { |
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$this->disable(); |
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$this->decrementRequestCount(); |
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throw $e; |
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} |
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return $response; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function sendAsyncRequest(RequestInterface $request) |
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{ |
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if ($this->isDisabled()) { |
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throw new Exception\RequestException('Cannot send the request as this client has been disabled', $request); |
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} |
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$this->incrementRequestCount(); |
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return $this->client->sendAsyncRequest($request)->then(function ($response) { |
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1 |
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$this->decrementRequestCount(); |
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return $response; |
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}, function ($exception) { |
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$this->disable(); |
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$this->decrementRequestCount(); |
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throw $exception; |
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}); |
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} |
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/** |
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* Whether this client is disabled or not. |
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* |
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* Will also reactivate this client if possible |
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* |
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* @return bool |
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*/ |
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public function isDisabled() |
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{ |
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$disabledAt = $this->getDisabledAt(); |
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if (null !== $this->reenableAfter && null !== $disabledAt) { |
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// Reenable after a certain time |
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$now = new \DateTime(); |
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if (($now->getTimestamp() - $disabledAt->getTimestamp()) >= $this->reenableAfter) { |
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$this->enable(); |
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return false; |
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} |
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return true; |
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} |
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return null !== $disabledAt; |
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} |
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/** |
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* Get current number of request that is send by the underlying http client. |
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* |
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* @return int |
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*/ |
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public function getSendingRequestCount() |
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{ |
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return $this->sendingRequestCount; |
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} |
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/** |
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* Return when this client has been disabled or null if it's enabled. |
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* |
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* @return \DateTime|null |
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*/ |
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private function getDisabledAt() |
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{ |
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return $this->disabledAt; |
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} |
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/** |
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* Increment the request count. |
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*/ |
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private function incrementRequestCount() |
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{ |
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++$this->sendingRequestCount; |
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} |
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/** |
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* Decrement the request count. |
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*/ |
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private function decrementRequestCount() |
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{ |
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--$this->sendingRequestCount; |
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} |
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/** |
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* Enable the current client. |
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*/ |
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private function enable() |
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{ |
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$this->disabledAt = null; |
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} |
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/** |
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* Disable the current client. |
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*/ |
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10 |
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private function disable() |
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{ |
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$this->disabledAt = new \DateTime('now'); |
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} |
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} |
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php-http /
client-common
