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<?php |
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/** |
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* Lookupd |
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* User: moyo |
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* Date: 15/11/2017 |
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* Time: 4:02 PM |
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*/ |
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namespace Carno\NSQ\Components; |
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use Carno\HTTP\Client; |
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use Carno\HTTP\Options; |
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use Carno\HTTP\Standard\Request; |
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use Carno\HTTP\Standard\Response; |
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use Carno\HTTP\Standard\Uri; |
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use Carno\Net\Address; |
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use Carno\Net\Endpoint; |
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use Carno\NSQ\Chips\LookupCached; |
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use Carno\NSQ\Exception\LookupRequestException; |
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use Carno\NSQ\Exception\NoneEndpointsException; |
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use Closure; |
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class Lookupd |
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{ |
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use LookupCached; |
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/** |
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* @var string |
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*/ |
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private $host = null; |
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/** |
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* @var int |
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*/ |
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private $port = null; |
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/** |
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* @var Client |
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*/ |
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private $http = null; |
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/** |
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* @var array |
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*/ |
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private $observers = []; |
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/** |
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* Lookupd constructor. |
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* @param string $host |
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* @param int $port |
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*/ |
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public function __construct(string $host = 'localhost', int $port = 4161) |
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{ |
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$this->host = $host; |
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$this->port = $port; |
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$this->http = new Client(new Options, new Address($host, $port)); |
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} |
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/** |
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* @param string $topic |
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* @param Closure $observer |
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* @return Endpoint[] |
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* @throws NoneEndpointsException |
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*/ |
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public function endpoints(string $topic, Closure $observer = null) |
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{ |
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$this->observers[] = $observer; |
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$querying = function () use ($topic) { |
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/** |
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* @var Response $response |
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*/ |
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$uri = new Uri('http', $this->host, $this->port, '/lookup', ['topic' => $topic]); |
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$request = new Request('GET', $uri, ['Accept' => 'application/vnd.nsq; version=1.0']); |
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$response = yield $this->http->perform($request); |
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switch ($response->getStatusCode()) { |
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case 200: |
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$endpoints = $this->parsing((string)$response->getBody()); |
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if ($this->observers) { |
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foreach ($this->observers as $observer) { |
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yield $observer($endpoints); |
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} |
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} |
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return $endpoints; |
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case 404: |
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throw new NoneEndpointsException; |
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default: |
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throw new LookupRequestException; |
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} |
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}; |
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if ($this->cached) { |
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return yield $this->cached->delegate($topic, $querying, $this->ttl); |
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} else { |
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return yield $querying(); |
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} |
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} |
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/** |
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* @param string $body |
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* @return Endpoint[] |
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*/ |
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private function parsing(string $body) : array |
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{ |
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$response = json_decode($body, true); |
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if (isset($response['producers']) && $response['producers']) { |
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$eps = []; |
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foreach ($response['producers'] as $producer) { |
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$eps[] = |
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(new Endpoint(new Address($producer['broadcast_address'], $producer['tcp_port']))) |
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->relatedService($producer['hostname']) |
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; |
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} |
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return $eps; |
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} |
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throw new NoneEndpointsException; |
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} |
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} |
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carno-php /
nsq
Loading history...
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.