// Process the integration events
public void ProcessEvent(string typeName, IntegrationEventReceivedNotificationDto eventReceived)
{
// No handlers registered
if (_handlers.Count == 0)
{
return;
}
var eventType = GetEventTypeByName(typeName);
var sqsResponse = (SnsMessage)JsonConvert.DeserializeObject(eventReceived.Message.Body, typeof(SnsMessage));
var integrationEvent = JsonConvert.DeserializeObject(sqsResponse.Message, eventType);
if (integrationEvent == null)
{
_logger.LogError("Error on integration event deserialization");
return;
}
OnIntegrationEventReceived?.Invoke(this, eventReceived);
foreach (var handlerCollection in _handlers)
{
if (handlerCollection.Key != typeName)
{
continue;
}
foreach (var handlerValue in handlerCollection.Value)
{
var handlerFactory = handlerValue.Item2;
var handler = handlerFactory.DynamicInvoke();
var concreteType = typeof(IIntegrationEventHandler <>).MakeGenericType(eventType);
var t = concreteType.GetRuntimeMethod("Handle", new[] { eventType });
t.Invoke(handler, new [] { integrationEvent });
var handlerName = handler.ToString().Split('.').Last();
// Update integration event context
UpdateIntegrationEventContext(eventReceived, eventType, handlerName);
}
}
}
private void UpdateIntegrationEventContext(
IntegrationEventReceivedNotificationDto eventReceived,
Type eventType,
string handlerName)
{
var instances = _integrationEventsRespository.GetIntegrationEventRegisteredInstances().Result;
if (instances == null || !instances.Values.Contains(eventType.Name))
{
_logger.LogWarning($"No integration event {eventType.Name} instance present, deleting message.");
OnIntegrationEventReadyToDelete?.Invoke(this, eventReceived);
return;
}
var instance = instances.First(i => i.Value == eventType.Name);
_logger.LogTrace($"Mark sub handler as processed, Guid: {instance.Key}, Event type: {instance.Value}, Handler name: {handlerName}");
var updatedInstance = _integrationEventsRespository.MarkSubscriberHandlerAsProcessed(
instance.Key,
instance.Value,
handlerName).Result;
if (updatedInstance == null)
{
throw new NullReferenceException();
}
// Check if the all subscribers have done
if (updatedInstance.Subscribers.All(i => i.Item2 == true))
{
// Delete the message on the queue
OnIntegrationEventReadyToDelete?.Invoke(this, eventReceived);
// Delete instance record
var result = _integrationEventsRespository.DeleteInstanceAsync(updatedInstance.Id,
updatedInstance.EventType).Result;
if (!result)
{
_logger.LogError("Error on deleting integration event instance");
}
}
}
