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<?php |
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namespace JVelasco\CircuitBreaker\Adapters; |
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use JVelasco\CircuitBreaker\AvailabilityStrategy; |
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use JVelasco\CircuitBreaker\AvailabilityStrategy\Storage; |
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use \JVelasco\CircuitBreaker\FailuresCounterStorage; |
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final class APCuStorage implements FailuresCounterStorage, Storage |
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{ |
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private $failuresCounterPrefix; |
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public function __construct(string $failuresCounterPrefix = "cb_failures") |
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{ |
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$this->failuresCounterPrefix = $failuresCounterPrefix; |
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} |
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public function incrementFailures(string $serviceName) |
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{ |
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apcu_inc($this->counterKeyForService($serviceName)); |
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} |
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public function decrementFailures(string $serviceName) |
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{ |
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$counterKey = $this->counterKeyForService($serviceName); |
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$newValue = apcu_dec($counterKey); |
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if ($newValue < 0) { |
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apcu_store($counterKey, 0); |
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} |
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} |
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public function numberOfFailures(string $serviceName): int |
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{ |
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return apcu_fetch($this->counterKeyForService($serviceName)); |
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} |
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public function saveStrategyData( |
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AvailabilityStrategy $strategy, |
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string $serviceName, |
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string $key, |
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string $value |
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) { |
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apcu_store($this->keyForStrategyData($strategy, $serviceName, $key), $value); |
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} |
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public function getStrategyData( |
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AvailabilityStrategy $strategy, |
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string $serviceName, |
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string $key |
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): string { |
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return apcu_fetch($this->keyForStrategyData($strategy, $serviceName, $key)); |
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} |
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public function resetFailuresCounter(string $serviceName) |
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{ |
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apcu_store($this->counterKeyForService($serviceName), 0); |
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} |
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private function counterKeyForService(string $serviceName): string |
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{ |
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return sprintf("%s.%s", $this->failuresCounterPrefix, $serviceName); |
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} |
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private function keyForStrategyData( |
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AvailabilityStrategy $strategy, |
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string $serviceName, |
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string $key |
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): string { |
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return implode(".", [$strategy->getId(), $serviceName, $key]); |
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} |
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} |
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j-velasco /
php-circuit-breaker
