/// <summary>
/// Handles all types of command asynchronously.
/// </summary>
/// <param name="command">The command.</param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">If command is null</exception>
/// <exception cref="ArgumentOutOfRangeException">If command has unsupported type</exception>
/// <exception cref="Exception">In case of more generic exception</exception>
public async Task <BaseItemEvent> HandleAsync(BaseItemCommand command)
{
try
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
BaseItemEvent evt;
switch (command)
{
case CreateItemCommand create:
evt = new ItemCreatedEvent(create.Item.Id, create.Item.Name, command.UserName, Guid.NewGuid(), DateTime.UtcNow);
break;
case DeleteItemCommand delete:
evt = new ItemDeletedEvent(delete.ItemId, delete.UserName, Guid.NewGuid(), DateTime.UtcNow);
break;
case UpdateItemCommand update:
evt = new ItemUpdatedEvent(update.Item.Id, update.Item.Name, update.UserName, Guid.NewGuid(), DateTime.UtcNow);
break;
default:
throw new ArgumentOutOfRangeException(nameof(command));
}
var applicationResult = await this.root.ApplyEventAsync(evt);
switch (applicationResult)
{
case SuccessAggregateApplicationResult success:
await this.root.CommitAsync();
await this.publisher.PublishAsync(evt);
return(evt);
case ItemNotFoundApplicationResult notFound:
throw new ItemNotFoundException();
case ItemAlreadyExistsApplicationResult itemExists:
throw new ItemAlreadyExistsException(itemExists.Message);
case FailedAggregateApplicationResult failed:
throw new Exception(failed.Error);
default:
throw new ArgumentOutOfRangeException(nameof(applicationResult));
}
}
catch (Exception e)
{
await this.root.RollbackAsync();
this.logger.LogError(e, $"Failed to process command {command.GetType().Name}");
throw;
}
}
public void Handle(ItemDeletedEvent e)
{
}
internal void Publish(ItemDeletedEvent itemDeletedEvent)
{
_bus.Publish(itemDeletedEvent);
}
public void Handle(ItemDeletedEvent e)
{
//Id = e.AggregateId;
}
public virtual void Delete(ItemDeletedEvent message)
{
}
public void Handle(ItemDeletedEvent @event)
{
hub.Clients.All.globalMessageRecieved(@event);
}
