/// <inheritdoc />
public async Task Handle(TCommand command)
{
var root = Create(command);
var events = root.GetUncommittedEvents().OfType <Event>().ToList();
var eventType = events.Select(e => e.MessageType).SingleOrDefault();
if (eventType == null)
{
throw new InvalidOperationException("More than one event type produced by a command");
}
command.EventType = eventType;
foreach (var e in events)
{
e.CommandId = command.MessageId;
e.AncestorId = command.MessageId;
e.CorrelationId = command.CorrelationId;
}
if (command.UseTimestamp)
{
root.TimestampEvents(command.Timestamp);
}
await _repository.Save(root);
}
/// <inheritdoc />
public virtual async Task Handle(TCommand command)
{
if (command == null)
{
throw new ArgumentNullException(typeof(TCommand).GetFriendlyName());
}
var root = await _repository.Find <TRoot>(command.Target, ComputeHash);
if (root == null)
{
throw new ArgumentNullException(typeof(TRoot).GetFriendlyName());
}
if (command.Timestamp < root.Timestamp)
{
throw new InvalidOperationException(
$"{typeof(TCommand).Name} command ({command.Timestamp}) updating the past of the aggregate {typeof(TRoot).Name}:{command.Target} ({root.Timestamp}) ");
}
Act(root, command);
if (command.UseTimestamp)
{
root.TimestampEvents(command.Timestamp);
}
var events = root.GetUncommittedEvents().OfType <Event>().ToList();
var eventType = events.Select(e => e.MessageType).SingleOrDefault();
if (eventType == null)
{
throw new InvalidOperationException("More than one event type produced by a command");
}
foreach (var e in events)
{
e.CommandId = command.MessageId;
e.AncestorId = command.MessageId;
e.CorrelationId = command.CorrelationId;
}
command.EventType = eventType;
await _repository.Save(root);
}
private async Task Handle(IEvent e)
{
// _log.Trace($"{typeof(TSaga).Name}.When({e.EventType}[{e.Stream}])");
_log.Trace($"{e.MessageType}", typeof(TSaga).GetFriendlyName());
try
{
var emptySaga = new TSaga();
var id = emptySaga.SagaId(e);
var isInitializer = emptySaga.IsInitializer(e);
TSaga saga;
if (isInitializer)
{
saga = await _repository.GetOrAdd <TSaga>(id);
}
else
{
saga = await _repository.Find <TSaga>(id);
}
if (saga == null)
{
return;
}
var saveEvent = ((Event)e).Copy();
saga.When(saveEvent);
var commands = saga.GetUncommittedCommands().OfType <Command>();
foreach (var c in commands)
{
c.AncestorId = e.MessageId;
c.CorrelationId = id;
}
await _repository.Save(saga);
}
catch (Exception exception)
{
_log.Errors.Add(exception);
}
}