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<?php
namespace Aws\Retry;
use Aws\Exception\AwsException;
use Aws\ResultInterface;
/**
* @internal
*/
class QuotaManager
{
private $availableCapacity;
private $capacityAmount;
private $initialRetryTokens;
private $maxCapacity;
private $noRetryIncrement;
private $retryCost;
private $timeoutRetryCost;
public function __construct($config = [])
{
$this->initialRetryTokens = isset($config['initial_retry_tokens'])
? $config['initial_retry_tokens']
: 500;
$this->noRetryIncrement = isset($config['no_retry_increment'])
? $config['no_retry_increment']
: 1;
$this->retryCost = isset($config['retry_cost'])
? $config['retry_cost']
: 5;
$this->timeoutRetryCost = isset($config['timeout_retry_cost'])
? $config['timeout_retry_cost']
: 10;
$this->maxCapacity = $this->initialRetryTokens;
$this->availableCapacity = $this->initialRetryTokens;
}
public function hasRetryQuota($result)
{
if ($result instanceof AwsException && $result->isConnectionError()) {
$this->capacityAmount = $this->timeoutRetryCost;
} else {
$this->capacityAmount = $this->retryCost;
}
if ($this->capacityAmount > $this->availableCapacity) {
return false;
}
$this->availableCapacity -= $this->capacityAmount;
return true;
}
public function releaseToQuota($result)
{
if ($result instanceof AwsException) {
$statusCode = (int) $result->getStatusCode();
} elseif ($result instanceof ResultInterface) {
$statusCode = isset($result['@metadata']['statusCode'])
? (int) $result['@metadata']['statusCode']
: null;
}
if (!empty($statusCode) && $statusCode >= 200 && $statusCode < 300) {
if (isset($this->capacityAmount)) {
$amount = $this->capacityAmount;
$this->availableCapacity += $amount;
unset($this->capacityAmount);
} else {
$amount = $this->noRetryIncrement;
$this->availableCapacity += $amount;
}
$this->availableCapacity = min(
$this->availableCapacity,
$this->maxCapacity
);
}
return (isset($amount) ? $amount : 0);
}
public function getAvailableCapacity()
{
return $this->availableCapacity;
}
}
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