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<?php |
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/** |
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* Cluster nodes routing |
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* User: moyo |
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* Date: 27/10/2017 |
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* Time: 4:03 PM |
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*/ |
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namespace Carno\Cluster; |
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use Carno\Cluster\Contracts\Tags; |
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use Carno\Cluster\Routing\Property; |
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use Carno\Cluster\Routing\Selector; |
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use Carno\Net\Endpoint; |
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use Closure; |
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class Routing |
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{ |
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use Property; |
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/** |
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* event types |
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*/ |
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public const JOINING = 0xE0; |
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public const LEAVING = 0xE1; |
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/** |
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* @var string |
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*/ |
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private $serviced = 'unassigned'; |
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/** |
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* @var string[] |
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*/ |
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private $tags = []; |
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/** |
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* @var bool |
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*/ |
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private $strict = true; |
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/** |
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* @var Closure |
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*/ |
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private $watcher = null; |
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/** |
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* Routing constructor. |
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* @param string $serviced |
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* @param Closure $watcher |
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*/ |
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public function __construct(string $serviced, Closure $watcher) |
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{ |
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$this->selector = new Selector($this->serviced = $serviced); |
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$this->watcher = $watcher; |
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} |
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/** |
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* @param string ...$tags |
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* @return static |
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*/ |
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public function accepts(string ...$tags) : self |
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{ |
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$this->tags = array_unique(array_merge($this->tags, $tags)); |
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return $this; |
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} |
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/** |
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* @param bool $yes |
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* @return static |
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*/ |
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public function strictly(bool $yes) : self |
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{ |
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$this->strict = $yes; |
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return $this; |
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} |
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/** |
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* @param string ...$tags |
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* @return Endpoint |
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*/ |
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public function picking(string ...$tags) : Endpoint |
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{ |
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return $this->selector->picking(...$tags); |
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} |
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/** |
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* @param Endpoint $endpoint |
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*/ |
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public function join(Endpoint $endpoint) : void |
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{ |
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if (!$this->strict || $this->inTags($endpoint->getTags())) { |
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$this->selector->classify($endpoint); |
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logger('cluster')->info('Discovered new service', ['node' => (string)$endpoint]); |
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($this->watcher)(self::JOINING, $endpoint); |
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} else { |
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$this->nmWarning($endpoint, 'route.join'); |
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} |
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} |
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/** |
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* @param Endpoint $endpoint |
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*/ |
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public function leave(Endpoint $endpoint) : void |
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{ |
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if (!$this->strict || $this->inTags($endpoint->getTags())) { |
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$this->selector->release($endpoint); |
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logger('cluster')->info('Service is gone', ['node' => (string)$endpoint]); |
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($this->watcher)(self::LEAVING, $endpoint); |
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} else { |
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$this->nmWarning($endpoint, 'route.leave'); |
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} |
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} |
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/** |
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* @param array $epTags |
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* @return bool |
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*/ |
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private function inTags(array $epTags) : bool |
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{ |
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foreach ($epTags ?: Tags::DEFAULT as $tag) { |
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if (in_array($tag, $this->tags)) { |
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return true; |
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} elseif (substr($tag, 0, strlen(Tags::CMD)) === Tags::CMD) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* @param Endpoint $endpoint |
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* @param string $op |
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*/ |
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private function nmWarning(Endpoint $endpoint, string $op) : void |
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{ |
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logger('cluster')->info( |
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'Discovered service tags not match', |
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[ |
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'action' => $op, |
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'service' => $endpoint->service(), |
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'expect' => implode(',', $this->tags ?? []), |
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'found' => implode(',', $endpoint->getTags()), |
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] |
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); |
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} |
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} |
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carno-php /
cluster
