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<?php
namespace Aws\EndpointV2;
use Aws\EndpointV2\Ruleset\Ruleset;
use Aws\Exception\UnresolvedEndpointException;
use Aws\LruArrayCache;
/**
* Given a service's Ruleset and client-provided input parameters, provides
* either an object reflecting the properties of a resolved endpoint,
* or throws an error.
*/
class EndpointProviderV2
{
/** @var Ruleset */
private $ruleset;
/** @var LruArrayCache */
private $cache;
public function __construct(array $ruleset, array $partitions)
{
$this->ruleset = new Ruleset($ruleset, $partitions);
$this->cache = new LruArrayCache(100);
}
/**
* @return Ruleset
*/
public function getRuleset()
{
return $this->ruleset;
}
/**
* Given a Ruleset and input parameters, determines the correct endpoint
* or an error to be thrown for a given request.
*
* @return RulesetEndpoint
* @throws UnresolvedEndpointException
*/
public function resolveEndpoint(array $inputParameters)
{
$hashedParams = $this->hashInputParameters($inputParameters);
$match = $this->cache->get($hashedParams);
if (!is_null($match)) {
return $match;
}
$endpoint = $this->ruleset->evaluate($inputParameters);
if ($endpoint === false) {
throw new UnresolvedEndpointException(
'Unable to resolve an endpoint using the provider arguments: '
. json_encode($inputParameters)
);
}
$this->cache->set($hashedParams, $endpoint);
return $endpoint;
}
private function hashInputParameters($inputParameters)
{
return md5(serialize($inputParameters));
}
}
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