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<?php |
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namespace League\Tactician\Handler\Locator; |
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use League\Tactician\Exception\MissingHandlerException; |
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/** |
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* Fetch handler instances from an in-memory collection. |
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* |
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* This locator allows you to bind a handler object to receive commands of a |
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* certain class name. For example: |
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* |
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* // Wire everything together |
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* $myHandler = new TaskAddedHandler($dependency1, $dependency2); |
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* $inMemoryLocator->addHandler($myHandler, 'My\TaskAddedCommand'); |
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* |
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* // Returns $myHandler |
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* $inMemoryLocator->getHandlerForCommand('My\TaskAddedCommand'); |
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*/ |
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class InMemoryLocator implements HandlerLocator |
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{ |
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/** |
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* @var object[] |
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*/ |
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protected $handlers = []; |
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/** |
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* @param array $commandClassToHandlerMap |
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*/ |
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public function __construct(array $commandClassToHandlerMap = []) |
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{ |
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$this->addHandlers($commandClassToHandlerMap); |
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} |
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/** |
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* Bind a handler instance to receive all commands with a certain class |
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* |
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* @param object $handler Handler to receive class |
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* @param string $commandClassName Command class e.g. "My\TaskAddedCommand" |
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*/ |
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public function addHandler($handler, $commandClassName): void |
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{ |
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$this->handlers[$commandClassName] = $handler; |
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} |
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/** |
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* Allows you to add multiple handlers at once. |
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* |
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* The map should be an array in the format of: |
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* [ |
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* AddTaskCommand::class => $someHandlerInstance, |
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* CompleteTaskCommand::class => $someHandlerInstance, |
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* ] |
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* |
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* @param array $commandClassToHandlerMap |
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*/ |
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protected function addHandlers(array $commandClassToHandlerMap): void |
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{ |
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foreach ($commandClassToHandlerMap as $commandClass => $handler) { |
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$this->addHandler($handler, $commandClass); |
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} |
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} |
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/** |
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* Returns the handler bound to the command's class name. |
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* |
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* @param string $commandName |
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* |
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* @return object |
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*/ |
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public function getHandlerForCommand($commandName) |
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{ |
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if (!isset($this->handlers[$commandName])) { |
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throw MissingHandlerException::forCommand($commandName); |
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} |
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return $this->handlers[$commandName]; |
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} |
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} |
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Adgoal /
tactician
