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<?php |
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namespace izzum\statemachine\persistence; |
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use izzum\statemachine\Identifier; |
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use izzum\statemachine\State; |
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/** |
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* In memory storage adapter that stores statemachine data, best used in a |
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* runtime environment. |
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* This is the default persistence adapter for a Context. |
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* |
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* TRICKY: This memory adapter only functions during the execution of |
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* one (1) php process. Therefore, it is best used in a runtime environment such |
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* as a php daemon program or an interactive command line php script. |
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* |
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* @author Rolf Vreijdenberger |
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*/ |
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class Memory extends Adapter { |
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/** |
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* hashmap. |
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* the key is Identifier->getId() |
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* |
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* @var StorageData[] |
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*/ |
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private static $registry = array(); |
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/** |
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* {@inheritDoc} |
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*/ |
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public function processGetState(Identifier $identifier) |
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{ |
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return $this->getStateFromRegistry($identifier); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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protected function insertState(Identifier $identifier, $state, $message = null) |
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{ |
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$this->setStateInRegistry($identifier, $state, $message); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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protected function updateState(Identifier $identifier, $state, $message = null) |
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{ |
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$this->setStateInRegistry($identifier, $state, $message); |
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} |
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/** |
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* |
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* @param Identifier $identifier |
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* @param string $state |
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*/ |
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protected function setStateInRegistry(Identifier $identifier, $state, $message = null) |
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{ |
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$data = new StorageData($identifier, $state, $message); |
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$this->writeRegistry($identifier->getId(), $data); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function isPersisted(Identifier $identifier) |
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{ |
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$persisted = false; |
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$storage = $this->getStorageFromRegistry($identifier); |
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if ($storage != null) { |
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$persisted = true; |
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} |
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return $persisted; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getEntityIds($machine, $state = null) |
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{ |
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$ids = array(); |
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foreach ($this->getRegistry() as $key => $storage) { |
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if (strstr($key, $machine)) { |
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if ($state) { |
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if ($storage->state === $state) { |
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$ids [] = $storage->id; |
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} |
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} else { |
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$ids [] = $storage->id; |
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} |
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} |
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} |
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return $ids; |
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} |
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protected function getStateFromRegistry(Identifier $identifier) |
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{ |
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$storage = $this->getStorageFromRegistry($identifier); |
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if (!$storage) { |
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$state = State::STATE_UNKNOWN; |
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} else { |
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$state = $storage->state; |
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} |
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return $state; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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protected function addHistory(Identifier $identifier, $state, $message = null, $is_exception = false) |
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{ |
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//don't store history in memory, this is a simple adapter and we don't want a memory increase |
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//for a long running process |
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} |
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/** |
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* |
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* @param string $key |
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* @param StorageData $value |
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*/ |
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protected function writeRegistry($key, $value) |
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{ |
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self::$registry [$key] = $value; |
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} |
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/** |
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* |
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* @return StorageData[] |
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*/ |
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protected function getRegistry() |
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{ |
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return self::$registry; |
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} |
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public function getStorageFromRegistry(Identifier $identifier) |
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{ |
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$registry = $this->getRegistry(); |
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if (!isset($registry [$identifier->getId()])) { |
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$storage = null; |
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} else { |
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$storage = $registry [$identifier->getId()]; |
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} |
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return $storage; |
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} |
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/** |
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* clears the storage facility. |
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* Not a method we want to have on the Adapter interface. |
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* this method is useful for testing. |
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*/ |
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public static function clear() |
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{ |
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self::$registry = array(); |
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} |
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1 |
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public static function get() |
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{ |
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return self::$registry; |
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} |
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160
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} |
rolfvreijdenberger /
izzum-statemachine
