public void Dispatch <C>(C command)
where C : CommandBase
{
try
{
// Log the fact that we received a command
_eventRepo.PersistEvent(new CommandReceivedEvent(command));
// Load the Aggreage
var initAggregate = _aggreageFactory.Init(command.AggregateId);
var aggregate = (A)_eventRepo
.FetchAggregateEvent(command.AggregateId) // <-- Fetch events from repo
.Aggregate(initAggregate, _applyEvent); // <-- Reduce the array of events to an AggregateRoot with the current state
// Command handler to create new events
var newEvents = _serviceLocator
.Resolve <ICommandHandler <C, A> >()
.Handle(command, aggregate)
.ToList();
// Apply the newly created events we got from the command handler
newEvents
.Where(e => e is IAggregateEvent) // Only apply Aggreage Events
.Select(e => e as IAggregateEvent)
.ToList()
.ForEach(e => _applyEvent(aggregate, e));
// Persist newly created events
newEvents.ForEach(_eventRepo.PersistEvent);
// Mark the command as successful
_eventRepo.PersistEvent(new CommandFulfilledEvent(command));
// Log
_log.Info($"Command {command.CommandId} Succesful");
}
catch (Exception ex)
{
// Log the rejected command
_eventRepo.PersistEvent(new CommandRejectedEvent(command, ex));
var msg = $"Command Rejected. CommandId: {command.CommandId}. {ex.Message}";
_log.Error(msg, ex);
throw new CommandRejectedException(msg, ex);
}
}
