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<?php |
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namespace LeoCarmo\CircuitBreaker; |
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use LeoCarmo\CircuitBreaker\Adapters\AdapterInterface; |
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class CircuitBreaker |
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{ |
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/** |
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* @var AdapterInterface |
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*/ |
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protected static $adapter; |
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/** |
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* @var string |
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*/ |
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protected static $redisNamespace; |
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/** |
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* @var array |
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*/ |
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protected static $servicesSettings; |
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/** |
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* @var array |
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*/ |
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protected static $globalSettings; |
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/** |
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* @var array |
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*/ |
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protected static $defaultSettings = [ |
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'timeWindow' => 60, |
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'failureRateThreshold' => 50, |
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'intervalToHalfOpen' => 30, |
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]; |
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/** |
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* @param AdapterInterface $adapter |
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*/ |
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public static function setAdapter(AdapterInterface $adapter) : void |
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{ |
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self::$adapter = $adapter; |
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} |
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/** |
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* @return AdapterInterface |
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*/ |
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public static function getAdapter() : AdapterInterface |
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{ |
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return self::$adapter; |
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} |
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/** |
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* Set global settings for all services |
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* |
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* @param array $settings |
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*/ |
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public static function setGlobalSettings(array $settings) : void |
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{ |
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foreach (self::$defaultSettings as $defaultSetting => $settingValue) { |
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self::$globalSettings[$defaultSetting] = (int) $settings[$defaultSetting] ?? $settingValue; |
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} |
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} |
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/** |
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* @return array |
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*/ |
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public static function getGlobalSettings() : array |
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{ |
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return self::$globalSettings; |
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} |
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/** |
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* Set custom settings for each service |
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* |
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* @param string $service |
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* @param array $settings |
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*/ |
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public static function setServiceSettings(string $service, array $settings) : void |
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{ |
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foreach (self::$defaultSettings as $defaultSetting => $settingValue) { |
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self::$servicesSettings[$service][$defaultSetting] = |
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(int) $settings[$defaultSetting] |
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?? self::$globalSettings[$defaultSetting] |
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?? $settingValue; |
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} |
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} |
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/** |
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* Get setting for a service, if not set, get from default settings |
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* |
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* @param string $service |
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* @param string $setting |
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* @return mixed |
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*/ |
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public static function getServiceSetting(string $service, string $setting) |
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{ |
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return self::$servicesSettings[$service][$setting] |
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?? self::$globalSettings[$setting] |
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?? self::$defaultSettings[$setting]; |
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} |
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/** |
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* Check if circuit is available (closed) |
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* |
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* @param string $service |
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* @return bool |
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*/ |
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public static function isAvailable(string $service) : bool |
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{ |
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if (self::$adapter->isOpen($service)) { |
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return false; |
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} |
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if (self::$adapter->reachRateLimit($service)) { |
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self::$adapter->setOpenCircuit($service); |
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self::$adapter->setHalfOpenCircuit($service); |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Set new failure for a service |
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* |
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* @param string $service |
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* @return bool |
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*/ |
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public static function failure(string $service) |
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{ |
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if (self::$adapter->isHalfOpen($service)) { |
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self::$adapter->setOpenCircuit($service); |
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self::$adapter->setHalfOpenCircuit($service); |
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return false; |
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} |
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return self::$adapter->incrementFailure($service); |
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} |
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/** |
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* Record success and clear all status |
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* |
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* @param string $service |
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* @return bool|int |
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*/ |
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public static function success(string $service) |
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{ |
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return self::$adapter->setSuccess($service); |
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} |
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} |
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leocarmo /
circuit-breaker-php
