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<?php |
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/** |
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* Common service endpoints lister |
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* User: moyo |
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* Date: 20/11/2017 |
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* Time: 6:20 PM |
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*/ |
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namespace Carno\Consul\APIs; |
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use Carno\Consul\Contracts\Defaults; |
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use Carno\Consul\Types\Service; |
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use function Carno\Coroutine\msleep; |
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use Carno\HTTP\Standard\Response; |
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use Carno\Net\Address; |
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use Carno\Net\Endpoint; |
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use Carno\Promise\Promised; |
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abstract class AbstractEndpointsLister extends AbstractWatcher |
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{ |
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/** |
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* @var string |
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*/ |
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protected $method = 'GET'; |
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/** |
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* @var Service |
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*/ |
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private $service = null; |
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/** |
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* @param string $service |
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* @return static |
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*/ |
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public function service(string $service) : self |
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{ |
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$this->service = new Service($service); |
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$this->setVars('service', $service); |
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$this->addParams(); |
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return $this; |
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} |
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/** |
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* @return Promised|Service |
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*/ |
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public function result() |
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{ |
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return $this->perform($this->getCanceller())->then(function (Response $response) { |
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if ($response->getStatusCode() !== 200) { |
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goto DO_WAIT; |
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} |
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// reset endpoints |
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$this->service->setEndpoints(); |
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// reset version |
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$this->assignVIndex($this->service, $response); |
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$this->setVIndex($this->service->getVersion()); |
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// new endpoints |
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$endpoints = $this->decodeResponse((string)$response->getBody()); |
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foreach ($endpoints as $endpoint) { |
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list($id, $name, $host, $port, $tags) = $this->genInfo($endpoint); |
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$this->service->addEndpoint( |
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(new Endpoint(new Address($host, $port))) |
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->relatedService($name) |
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->assignID($this->distinctID($name, $id)) |
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->setTags(...$tags) |
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); |
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} |
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// continue to next |
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if ($this->service->hasVersion()) { |
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return $this->service; |
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} |
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DO_WAIT: |
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// make sleep if no versions |
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return msleep(rand(...$this->emptyWait), function () { |
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return $this->service; |
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}); |
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}); |
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} |
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/** |
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* @param string $service |
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* @param string $id |
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* @return string |
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*/ |
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private function distinctID(string $service, string $id) : string |
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{ |
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$id = ltrim($id, sprintf('%s:', Defaults::SVC_FLAG)); |
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if (substr($id, 0, strlen($service)) === $service) { |
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$id = substr($id, strlen($service)); |
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if (substr($id, 0, 1) === '-') { |
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$id = substr($id, 1); |
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} |
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} |
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return $id; |
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} |
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/** |
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* returned syntax |
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* [string $id, string $name, string $host, int $port, array $tags] |
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* @param array $endpoint |
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* @return array |
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*/ |
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abstract protected function genInfo(array $endpoint) : array; |
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/** |
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* triggered when service assigned |
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*/ |
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abstract protected function addParams() : void; |
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} |
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carno-php /
consul
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