/**
* @param EventInterface $event
* @return bool|void
* @throws BusException
*/
public function publishEvent(EventInterface $event)
{
$eventClass = get_class($event);
if (!isset($this->eventListenerMap[$eventClass])) {
return false;
}
foreach ($this->eventListenerMap[$eventClass] as $callableOrDefinition) {
if (is_callable($callableOrDefinition)) {
call_user_func($callableOrDefinition, $event);
}
if (is_array($callableOrDefinition)) {
if (is_null($this->eventListenerLoader)) {
throw BusException::loaderNotExistError(sprintf('Can not load the event listener <%s>. No EventListenerLoader found.', $callableOrDefinition['alias']));
}
$eventListener = $this->eventListenerLoader->getEventListener($callableOrDefinition['alias']);
$method = $callableOrDefinition['method'];
// instead of invoking the handler method directly
// we call the execute function of the implemented trait and pass along a reference to the gate
$usedTraits = class_uses($eventListener);
if (!isset($usedTraits['Malocher\\Cqrs\\Adapter\\AdapterTrait'])) {
throw BusException::traitError('Adapter Trait is missing! Use it!');
}
$eventListener->executeEvent($this, $eventListener, $method, $event);
}
}
return true;
}
/**
* {@inheritDoc}
*/
public function publishEvent(EventInterface $event)
{
// Check if event exists after invoking the PublishEventCommand because
// the PublishEventCommand tells that a event is dispatched but does not care
// if it succeeded. Later the EventPublishedEvent can be used to check if a
// event succeeded.
if (!is_null($this->gate->getSystemBus())) {
$publishEventCommand = new PublishEventCommand();
$publishEventCommand->setMessageClass(get_class($event));
$publishEventCommand->setMessageVars($event->getMessageVars());
$publishEventCommand->setBusName($this->getName());
$this->gate->getSystemBus()->invokeCommand($publishEventCommand);
}
try {
$response = $this->bus->publishEvent($event);
if ($response === false) {
return false;
}
} catch (BusException $ex) {
//throw it again
throw $ex;
} catch (\Exception $ex) {
throw BusException::defaultBusError($ex->getMessage(), null, $ex);
}
// Dispatch the EventPublishedEvent here! If for example a event could not be dispatched
// because it does not exist in the eventListenerMap[<empty>] this Event would never
// be dispatched!
if (!is_null($this->gate->getSystemBus())) {
$eventPublishedEvent = new EventPublishedEvent();
$eventPublishedEvent->setMessageClass(get_class($event));
$eventPublishedEvent->setMessageVars($event->getMessageVars());
$eventPublishedEvent->setBusName($this->getName());
$this->gate->getSystemBus()->publishEvent($eventPublishedEvent);
}
return $response;
}
/**
* get bus by name
*
* If no name is provided, the gate tries to find a default bus:
* 1. you can set a default bus via {@see setDefaultBusName}
* 2. if only one bus is attached, it is treated as default bus
*
* @param string $name
* @return BusInterface|null If the system bus is requested but not enabled, method returns null
* @throws Bus\BusException If default bus can not be detected or bus not exists
*/
public function getBus($name = null)
{
if ($name == AbstractBus::SYSTEMBUS) {
return $this->systemBus;
}
if (is_null($name)) {
if (!is_null($this->defaultBusName)) {
$name = $this->defaultBusName;
} else {
if (count($this->buses) == 1) {
return current($this->buses);
} else {
throw Bus\BusException::defaultBusError('Default bus can not be detected. Please set the default bus or provide a bus name');
}
}
}
if (!isset($this->buses[$name])) {
throw Bus\BusException::busNotExistError(sprintf('The bus <%s> can not be found', $name));
}
return $this->buses[$name];
}
