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<?php |
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/** |
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* Created for IG Monitoring. |
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* User: jakim <[email protected]> |
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* Date: 09.05.2018 |
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*/ |
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namespace app\components\http; |
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use app\models\Proxy; |
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use DateTime; |
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use Yii; |
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use yii\base\Component; |
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use yii\base\Exception; |
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use yii\base\InvalidConfigException; |
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class ProxyManager extends Component |
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{ |
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public $restTime = 1; |
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public function reserve($model): Proxy |
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{ |
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$uid = $this->generateUid(); |
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$condition = $this->prepareCondition($model); |
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$sql = Yii::$app->db->createCommand() |
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->update('proxy', [ |
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'reservation_uid' => $uid, |
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'updated_at' => (new DateTime())->format('Y-m-d H:i:s'), |
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], $condition)->rawSql; |
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$n = Yii::$app->db->createCommand("{$sql} ORDER BY [[updated_at]] ASC LIMIT 1") |
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->execute(); |
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if (empty($n)) { |
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throw new Exception('No proxy available.'); |
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} |
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$proxy = Proxy::findOne(['reservation_uid' => $uid]); |
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if (empty($proxy)) { |
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throw new InvalidConfigException('Something is wrong with \'ProxyManager\'.'); |
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} |
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return $proxy; |
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} |
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public function release(Proxy $proxy) |
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{ |
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Proxy::updateAll(['reservation_uid' => null], 'reservation_uid=:reservation_uid', [':reservation_uid' => $proxy->reservation_uid]); |
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} |
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public function invalidate(Proxy $proxy) |
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{ |
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Proxy::updateAll(['active' => false], 'id=:id', [':id' => $proxy->id]); |
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} |
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protected function generateUid() |
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{ |
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return sprintf('%s_%s', Yii::$app->security->generateRandomString(64), time()); |
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} |
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private function prepareCondition($model) |
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{ |
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$andWhere = [ |
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'and', |
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['active' => 1], |
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['reservation_uid' => null], |
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['<=', 'updated_at', (new DateTime(sprintf('-%d seconds', (int) $this->restTime)))->format('Y-m-d H:i:s')], |
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]; |
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if ($model->proxy_id) { |
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$andWhere[] = ['id' => $model->proxy_id]; |
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} |
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return $andWhere; |
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} |
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} |
jakim /
ig-monitoring
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