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<?php |
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/** |
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* This file is part of the bugloos/fault-tolerance-bundle project. |
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* (c) Bugloos <https://bugloos.com/> |
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* For the full copyright and license information, please view |
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* the LICENSE file that was distributed with this source code. |
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* |
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* @author Mojtaba Gheytasi <[email protected]> |
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*/ |
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namespace Bugloos\FaultToleranceBundle\CircuitBreaker\Storage; |
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use Psr\Cache\InvalidArgumentException; |
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use Symfony\Component\Cache\Adapter\AdapterInterface; |
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class Storage |
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{ |
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private AdapterInterface $adapter; |
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public function __construct(AdapterInterface $adapter) |
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{ |
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$this->adapter = $adapter; |
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} |
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/** |
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* @throws InvalidArgumentException |
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*/ |
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public function isOpen(string $commandKey): bool |
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{ |
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return (bool) $this->adapter->getItem($this->openCacheKey($commandKey))->get(); |
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} |
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/** |
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* @throws InvalidArgumentException |
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*/ |
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public function isHalfOpen(string $commandKey): bool |
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{ |
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return (bool) $this->adapter->getItem($this->halfOpenCacheKey($commandKey))->get(); |
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} |
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/** |
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* @throws InvalidArgumentException |
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*/ |
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public function setOpenCircuit(string $commandKey, int $timeWindow): void |
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{ |
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$openCircuit = $this->adapter->getItem($this->openCacheKey($commandKey)); |
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$openCircuit |
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->set(true) |
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->expiresAfter($timeWindow); |
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$this->adapter->save($openCircuit); |
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} |
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/** |
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* @throws InvalidArgumentException |
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*/ |
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public function setHalfOpenCircuit(string $commandKey, int $timeWindow, int $intervalToHalfOpen): void |
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{ |
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$halfOpenCircuit = $this->adapter->getItem($this->halfOpenCacheKey($commandKey)); |
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$halfOpenCircuit |
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->set(true) |
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->expiresAfter($timeWindow + $intervalToHalfOpen); |
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$this->adapter->save($halfOpenCircuit); |
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} |
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/** |
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* @throws InvalidArgumentException |
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*/ |
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public function incrementFailure(string $commandKey, int $timeWindow): void |
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{ |
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$failures = $this->adapter->getItem($this->failuresCacheKey($commandKey)); |
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if ($failures->get()) { |
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$failuresExpireDatetime = $this->getFailuresExpireTime($commandKey); |
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$failures->set($failures->get() + 1) |
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->expiresAt($failuresExpireDatetime); |
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} else { |
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$expirationDatetime = $this->makeFailuresExpireTime($timeWindow); |
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$failures->set(1) |
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->expiresAt($expirationDatetime); |
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$this->rememberFailuresExpireTime($commandKey, $expirationDatetime); |
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} |
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$this->adapter->save($failures); |
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} |
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/** |
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* @throws InvalidArgumentException |
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*/ |
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public function failureCount(string $commandKey): int |
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{ |
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return $this->adapter->getItem($this->failuresCacheKey($commandKey))->get() ?? 0; |
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} |
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/** |
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* @throws InvalidArgumentException |
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*/ |
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public function setSuccess(string $commandKey): void |
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{ |
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$this->adapter->deleteItems([ |
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$this->halfOpenCacheKey($commandKey), |
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$this->openCacheKey($commandKey), |
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$this->failuresCacheKey($commandKey), |
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$this->failuresExpireTimeCacheKey($commandKey), |
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]); |
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} |
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private function failuresCacheKey(string $commandKey): string |
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{ |
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return $commandKey . '.failures'; |
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} |
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private function openCacheKey(string $commandKey): string |
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{ |
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return $commandKey . '.open'; |
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} |
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private function halfOpenCacheKey(string $commandKey): string |
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{ |
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return $commandKey . '.halfOpen'; |
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} |
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private function failuresExpireTimeCacheKey(string $commandKey): string |
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{ |
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return $this->failuresCacheKey($commandKey) . '.expireTime'; |
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} |
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/** |
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* @throws InvalidArgumentException |
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*/ |
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private function getFailuresExpireTime(string $commandKey): \DateTime |
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{ |
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return $this->adapter->getItem( |
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$this->failuresExpireTimeCacheKey($commandKey) |
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)->get(); |
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} |
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/** |
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* @throws InvalidArgumentException |
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*/ |
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private function rememberFailuresExpireTime(string $commandKey, \DateTime $expirationDatetime) |
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{ |
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$failuresExpireDatetime = $this->adapter->getItem( |
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$this->failuresExpireTimeCacheKey($commandKey) |
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) |
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->set($expirationDatetime) |
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->expiresAt($expirationDatetime); |
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$this->adapter->save($failuresExpireDatetime); |
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} |
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private function makeFailuresExpireTime(int $timeWindow): \DateTime |
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{ |
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return (new \DateTime()) |
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->add( |
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date_interval_create_from_date_string("$timeWindow seconds") |
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); |
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} |
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} |
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bugloos /
fault-tolerance-bundle
