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<?php |
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/** |
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* Copyright (c) 2017 Constantin Galbenu <[email protected]> |
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*/ |
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namespace Gica\Cqrs\Saga\State; |
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class InMemoryStateManager implements ProcessStateLoader, ProcessStateUpdater |
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{ |
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private $states = []; |
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public function loadState(string $stateClass, $stateId) |
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{ |
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$key = $stateClass . $stateId; |
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if (isset($this->states[$key])) { |
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return $this->states[$key]; |
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} |
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return null; |
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} |
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public function hasState(string $stateClass, $stateId) |
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{ |
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$key = $stateClass . $stateId; |
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return isset($this->states[$key]); |
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} |
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public function updateState($stateId, callable $updater) |
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{ |
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list($stateClass, $isOptional) = $this->getStateClass($updater); |
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$oldState = $this->loadState($stateClass, $stateId); |
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if (!$this->hasState($stateClass, $stateId)) { |
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if (!$isOptional) { |
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$oldState = new $stateClass; |
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} |
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} |
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$newState = call_user_func($updater, $oldState); |
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$key = $stateClass . $stateId; |
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$this->states[$key] = $newState; |
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} |
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private function getStateClass(callable $update) |
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{ |
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$reflection = new \ReflectionFunction($update); |
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if ($reflection->getNumberOfParameters() <= 0) { |
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throw new \Exception("Updater callback must have one type-hinted parameter"); |
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} |
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$parameter = $reflection->getParameters()[0]; |
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return [$parameter->getClass()->name, $parameter->isOptional()]; |
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} |
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public function clearAllStates() |
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{ |
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$this->states = []; |
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} |
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public function createStorage() |
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{ |
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$this->states = []; |
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} |
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} |
xprt64 /
cqrs-es
