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<?php |
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namespace Tactics\CommandBusBundle\CommandBus; |
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use Tactics\CommandBusBundle\Command\Command; |
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use Tactics\CommandBusBundle\CommandHandler\CommandHandler; |
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use Tactics\CommandBusBundle\Exception\DuplicateHandlerException; |
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use Tactics\CommandBusBundle\NamingStrategy\NamingStrategy; |
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/** |
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* Class SimpleCommandBus |
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* @package Tactics\CommandBusBundle\CommandBus |
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*/ |
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class SimpleCommandBus implements CommandBus |
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{ |
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/** |
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* @var array |
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*/ |
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private $handlers = []; |
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/** |
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* @var \Tactics\CommandBusBundle\NamingStrategy\NamingStrategy |
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*/ |
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private $namingStrategy; |
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/**e |
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* @param NamingStrategy $namingStrategy |
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*/ |
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public function __construct(NamingStrategy $namingStrategy) |
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{ |
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$this->namingStrategy = $namingStrategy; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function registerHandler(CommandHandler $handler) |
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{ |
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$this->guardAgainstDuplicateHandlers($handler); |
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$this->handlers[$this->namingStrategy->getCommandHandlerName($handler)] = $handler; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getHandlers() |
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{ |
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return $this->handlers; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function handle(Command $command) |
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{ |
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$handler = $this->findHandler($this->namingStrategy->getCommandName($command)); |
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if (! $handler) { |
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return; |
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} |
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$handler->handle($command); |
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} |
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/** |
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* @param CommandHandler $handler |
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* @throws DuplicateHandlerException |
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*/ |
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private function guardAgainstDuplicateHandlers(CommandHandler $handler) |
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{ |
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if ($this->findHandler($this->namingStrategy->getCommandHandlerName($handler))) { |
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throw new DuplicateHandlerException($handler); |
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} |
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} |
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/** |
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* @param string $needle |
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* @return CommandHandler |
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*/ |
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private function findHandler($needle) |
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{ |
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return array_key_exists($needle, $this->handlers) |
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? $this->handlers[$needle] |
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: null; |
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} |
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} |
Tactics /
CommandBusBundle
