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<?php |
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/** |
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* Endpoints refresher (from lookupd) |
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* User: moyo |
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* Date: 17/11/2017 |
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* Time: 5:29 PM |
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*/ |
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namespace Carno\NSQ\Chips; |
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use Carno\Net\Endpoint; |
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use Carno\NSQ\Components\Lookupd; |
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use Carno\NSQ\Connector\Linker; |
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use Closure; |
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trait EndpointsRefresher |
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{ |
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/** |
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* @var Endpoint[] |
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*/ |
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private $cachedEndpoints = []; |
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/** |
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* @param Lookupd $lookupd |
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* @param string $topic |
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* @return Endpoint |
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*/ |
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protected function lookupEndpoint(Lookupd $lookupd, string $topic) |
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{ |
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if (empty($this->cachedEndpoints)) { |
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$this->cachedEndpoints = yield $lookupd->endpoints($topic, function (array $endpoints) { |
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$this->cachedEndpoints = $endpoints; |
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}); |
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} |
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return $this->cachedEndpoints[array_rand($this->cachedEndpoints)]; |
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} |
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/** |
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* @param string $topic |
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* @param Closure $linker |
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* @param Lookupd $lookupd |
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* @param array $statics |
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* @return Endpoint[] |
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*/ |
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protected function syncedEndpoints(string $topic, Closure $linker, Lookupd $lookupd = null, array $statics = []) |
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{ |
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return $lookupd ? $lookupd->endpoints($topic, function (array $endpoints) use ($linker) { |
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return $this->routedEndpoints($linker, ...$endpoints); |
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}) : $this->routedEndpoints($linker, ...$statics); |
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} |
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/** |
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* @param Closure $linker |
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* @param Endpoint ...$endpoints |
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* @return Endpoint[] |
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*/ |
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private function routedEndpoints(Closure $linker, Endpoint ...$endpoints) |
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{ |
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// marking |
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$current = $this->markedEndpoints(...$this->cachedEndpoints); |
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$found = $this->markedEndpoints(...$endpoints); |
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// reset |
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$this->cachedEndpoints = $endpoints; |
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// checking |
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foreach ($current as $id => $endpoint) { |
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if (isset($found[$id])) { |
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unset($found[$id]); |
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unset($current[$id]); |
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} |
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} |
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// new joining |
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foreach ($found as $endpoint) { |
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yield $linker(Linker::ACT_JOIN, $endpoint); |
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} |
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// old leaving |
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foreach ($current as $endpoint) { |
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yield $linker(Linker::ACT_LEAVE, $endpoint); |
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} |
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return $endpoints; |
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} |
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/** |
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* @param Endpoint ...$endpoints |
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* @return Endpoint[] |
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*/ |
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private function markedEndpoints(Endpoint ...$endpoints) |
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{ |
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$marked = []; |
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foreach ($endpoints as $endpoint) { |
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$marked[(string)$endpoint->address()] = $endpoint; |
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} |
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return $marked; |
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} |
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} |
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