public function handle(CommandInterface $command)
{
$commandName = $this->getCommandName($command);
if (!$this->commandHandlers->has($commandName)) {
throw new Exception\RuntimeException(sprintf('No handler registered for command "%s"', $commandName));
}
$preEventParams = array(CommandDispatcherEvent::PARAM_COMMAND_NAME => $commandName, CommandDispatcherEvent::PARAM_COMMAND => $command);
$events = $this->getEventManager();
$preEvent = $this->prepareEvent(CommandDispatcherEvent::EVENT_PRE_HANDLE, $preEventParams);
$events->trigger($preEvent, function ($result) {
// Don't handle the command when a listener returns false
return $result === false;
});
$commandHandler = $this->commandHandlers->get($commandName);
$commandHandlerResult = $commandHandler->handle($command);
$postEventParams = array_merge($preEventParams, array(CommandDispatcherEvent::PARAM_RESULT => $commandHandlerResult));
$postEvent = $this->prepareEvent(CommandDispatcherEvent::EVENT_HANDLE, $postEventParams);
$events->trigger($postEvent);
return $commandHandlerResult;
}
/**
* @param CommandInterface $command
* @return mixed
*/
public function dispatch(CommandInterface $command)
{
$commandName = $this->getCommandName($command);
if (!$this->commandHandlers->has($commandName)) {
throw new Exception\RuntimeException(sprintf('No handler registered for command "%s"', $commandName));
}
$preEventParams = array(CommandDispatcherEvent::PARAM_COMMAND_NAME => $commandName, CommandDispatcherEvent::PARAM_COMMAND => $command);
$continueDispatch = $this->triggerPreDispatchEvent(CommandDispatcherEvent::EVENT_PRE_DISPATCH, $preEventParams);
/** @todo Remove when we can break backwards compatibility */
if ($continueDispatch) {
$continueDispatch = $this->triggerPreDispatchEvent(CommandDispatcherEvent::EVENT_PRE_HANDLE, $preEventParams);
}
if (!$continueDispatch) {
/** @todo Should probably trigger an abort event */
return null;
}
$commandHandler = $this->commandHandlers->get($commandName);
$commandHandlerResult = $commandHandler->handle($command);
$postEventParams = array_merge($preEventParams, array(CommandDispatcherEvent::PARAM_RESULT => $commandHandlerResult));
$this->triggerPostDispatchEvent(CommandDispatcherEvent::EVENT_DISPATCH, $postEventParams);
/** @todo Remove when we can break backwards compatibility */
$this->triggerPostDispatchEvent(CommandDispatcherEvent::EVENT_HANDLE, $postEventParams);
return $commandHandlerResult;
}
