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<?php |
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/** |
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* Service keepalive (agent-check updater) |
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* User: moyo |
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* Date: 18/09/2017 |
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* Time: 4:18 PM |
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*/ |
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namespace Carno\Consul\Features; |
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use Carno\Consul\APIs\AgentCheckUpdater; |
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use Carno\Consul\APIs\AgentServiceRegister; |
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use Carno\Consul\Contracts\Defaults; |
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use Carno\Consul\Results\Failed; |
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use Carno\Consul\Types\Result; |
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use Carno\Consul\Types\Service; |
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use function Carno\Coroutine\co; |
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use function Carno\Coroutine\go; |
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use function Carno\Coroutine\msleep; |
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use Carno\Timer\Timer; |
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use Generator; |
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use Throwable; |
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class Keepalive |
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{ |
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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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* @var string |
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*/ |
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private $identify = null; |
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/** |
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* @var string |
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*/ |
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private $daemon = null; |
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/** |
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* Keepalive constructor. |
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* @param Service $service |
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* @param int $heartbeat |
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*/ |
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public function __construct(Service $service, int $heartbeat) |
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{ |
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$this->service = $service; |
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$this->identify = sprintf('service:%s', $service->id()); |
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$this->start($heartbeat); |
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} |
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/** |
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* @param int $heartbeat |
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*/ |
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private function start(int $heartbeat) : void |
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{ |
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$this->daemon = Timer::loop($heartbeat * 1000, co(function () { |
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yield $this->updating(); |
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})); |
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logger('consul')->info( |
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'Agent check updater started', |
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['id' => $this->identify, 'agent' => $this->service->hosting()] |
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); |
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go($this->updating()); |
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} |
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/** |
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* @return void |
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*/ |
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public function shutdown() : void |
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{ |
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$this->daemon && Timer::clear($this->daemon); |
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logger('consul')->info('Agent check updater stopped', ['id' => $this->identify]); |
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} |
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/** |
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* @return Generator|void |
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*/ |
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private function updating() |
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{ |
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/** |
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* @var Result $krr |
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*/ |
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try { |
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$krr = yield (new AgentCheckUpdater($this->service->hosting())) |
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->related($this->identify, AgentCheckUpdater::PASS) |
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->signature() |
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->result() |
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; |
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} catch (Throwable $e) { |
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$krr = new Failed(sprintf('%s::%s', get_class($e), $e->getMessage())); |
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} |
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if ($krr->success()) { |
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logger('consul')->debug( |
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'Agent check update success', |
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['id' => $this->identify, 'agent' => $this->service->hosting()] |
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); |
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} else { |
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logger('consul')->warning( |
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'Agent check update failed', |
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['id' => $this->identify, 'agent' => $this->service->hosting(), 'reason' => $krr->reason()] |
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); |
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yield msleep($sleep = rand(Defaults::ERROR_RETRY_MIN, Defaults::ERROR_RETRY_MAX)); |
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yield $this->recovering(); |
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} |
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} |
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/** |
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* @return Generator|void |
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*/ |
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private function recovering() |
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{ |
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/** |
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* @var Service $service |
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* @var Result $srr |
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*/ |
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try { |
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$srr = yield (new AgentServiceRegister($this->service->agent())) |
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->service($this->service) |
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->result() |
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; |
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} catch (Throwable $e) { |
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$srr = new Failed(sprintf('%s::%s', get_class($e), $e->getMessage())); |
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} |
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if ($srr->success()) { |
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logger('consul')->info( |
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'Service recovering success', |
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['id' => $this->identify, 'agent' => $this->service->hosting()] |
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); |
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} else { |
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logger('consul')->warning( |
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'Service recovering failed', |
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['id' => $this->identify, 'agent' => $this->service->hosting(), 'reason' => $srr->reason()] |
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); |
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} |
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} |
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} |
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carno-php /
consul
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