Current File : //www/loslex/demo/vendor/php-http/client-common/src/HttpClientPool/HttpClientPoolItem.php
<?php
declare(strict_types=1);
namespace Http\Client\Common\HttpClientPool;
use Http\Client\Common\FlexibleHttpClient;
use Http\Client\Exception;
use Http\Client\HttpAsyncClient;
use Http\Client\HttpClient;
use Psr\Http\Client\ClientInterface;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
/**
* A HttpClientPoolItem represent a HttpClient inside a Pool.
*
* It is disabled when a request failed and can be reenabled after a certain number of seconds.
* It also keep tracks of the current number of open requests the client is currently being sending
* (only usable for async method).
*
* This class is used internally in the client pools and is not supposed to be used anywhere else.
*
* @final
*
* @internal
*
* @author Joel Wurtz <joel.wurtz@gmail.com>
*/
class HttpClientPoolItem implements HttpClient, HttpAsyncClient
{
/**
* @var int Number of request this client is currently sending
*/
private $sendingRequestCount = 0;
/**
* @var \DateTime|null Time when this client has been disabled or null if enable
*/
private $disabledAt;
/**
* Number of seconds until this client is enabled again after an error.
*
* null: never reenable this client.
*
* @var int|null
*/
private $reenableAfter;
/**
* @var FlexibleHttpClient A http client responding to async and sync request
*/
private $client;
/**
* @param ClientInterface|HttpAsyncClient $client
* @param int|null $reenableAfter Number of seconds until this client is enabled again after an error
*/
public function __construct($client, int $reenableAfter = null)
{
if (!$client instanceof ClientInterface && !$client instanceof HttpAsyncClient) {
throw new \TypeError(
sprintf('%s::__construct(): Argument #1 ($client) must be of type %s|%s, %s given', self::class, ClientInterface::class, HttpAsyncClient::class, get_debug_type($client))
);
}
$this->client = new FlexibleHttpClient($client);
$this->reenableAfter = $reenableAfter;
}
/**
* {@inheritdoc}
*/
public function sendRequest(RequestInterface $request): ResponseInterface
{
if ($this->isDisabled()) {
throw new Exception\RequestException('Cannot send the request as this client has been disabled', $request);
}
try {
$this->incrementRequestCount();
$response = $this->client->sendRequest($request);
$this->decrementRequestCount();
} catch (Exception $e) {
$this->disable();
$this->decrementRequestCount();
throw $e;
}
return $response;
}
/**
* {@inheritdoc}
*/
public function sendAsyncRequest(RequestInterface $request)
{
if ($this->isDisabled()) {
throw new Exception\RequestException('Cannot send the request as this client has been disabled', $request);
}
$this->incrementRequestCount();
return $this->client->sendAsyncRequest($request)->then(function ($response) {
$this->decrementRequestCount();
return $response;
}, function ($exception) {
$this->disable();
$this->decrementRequestCount();
throw $exception;
});
}
/**
* Whether this client is disabled or not.
*
* If the client was disabled, calling this method checks if the client can
* be reenabled and if so enables it.
*/
public function isDisabled(): bool
{
if (null !== $this->reenableAfter && null !== $this->disabledAt) {
// Reenable after a certain time
$now = new \DateTime();
if (($now->getTimestamp() - $this->disabledAt->getTimestamp()) >= $this->reenableAfter) {
$this->enable();
return false;
}
return true;
}
return null !== $this->disabledAt;
}
/**
* Get current number of request that are currently being sent by the underlying HTTP client.
*/
public function getSendingRequestCount(): int
{
return $this->sendingRequestCount;
}
/**
* Increment the request count.
*/
private function incrementRequestCount(): void
{
++$this->sendingRequestCount;
}
/**
* Decrement the request count.
*/
private function decrementRequestCount(): void
{
--$this->sendingRequestCount;
}
/**
* Enable the current client.
*/
private function enable(): void
{
$this->disabledAt = null;
}
/**
* Disable the current client.
*/
private function disable(): void
{
$this->disabledAt = new \DateTime('now');
}
}
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