public void Publish <TAggregateRootId>(IDomainCommand <TAggregateRootId> command)
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
var message = new DomainCommandTransportMessage <TAggregateRootId>(command);
_messagePublisher.Publish(message);
}
public void Publish(IDomainCommand command)
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
var message = new DomainCommandTransportMessage(command);
_messagePublisher.Publish(message);
}
public async Task HandleAsync(DomainCommandTransportMessage <TAggregateRootId> message, CancellationToken token = default)
{
var command = message.DomainCommand;
var commandId = command.Id;
var commandType = command.GetType().FullName;
var aggregateRootId = command.AggregateRootId;
var aggregateRootType = command.AggregateRootType;
var aggregateRootTypeFullName = aggregateRootType.FullName;
var aggregateRootStringId = command.AggregateRootId.ToString();
var aggregate = _cache.Get(aggregateRootStringId, aggregateRootType) ??
await _stateBackend.GetAsync(aggregateRootId, aggregateRootType, token);
if (aggregate == null)
{
_logger.LogCritical($"Failed to restore aggregate root: [Id: {aggregateRootStringId}, Type: {aggregateRootTypeFullName}] for domain command: [Id: {commandId}, Type: {commandType}] from cache and state backend.");
return;
}
aggregate.MutatingDomainEvents?.Clear();
aggregate.MutatingDomainNotifications?.Clear();
try
{
var context = AggregateRootMessagingContext.Singleton.SetServiceProvider(_serviceProvider);
var result = aggregate.HandleDomainCommand(context, command);
if (!result.Succeed())
{
_logger.LogError($"Handling domain command: [Id: {commandId}, Type: {commandType}] has a error: {result.Message}.");
return;
}
}
catch (Exception e) when(e.InnerException is DomainException domainException)
{
await ProcessDomainExceptionAsync(command, domainException, token);
return;
}
catch (Exception e)
{
await ProcessUnKnownExceptionAsync(command, e, token);
return;
}
var hasDomainEvent = false;
var mutatingDomainEvents = aggregate.MutatingDomainEvents;
if (mutatingDomainEvents.IsNotEmpty())
{
hasDomainEvent = true;
await ProcessMutatingDomainEventsAsync(aggregate.MutatingDomainEvents, command, token);
}
var hasDomainNotification = false;
var mutatingDomainNotifications = aggregate.MutatingDomainNotifications;
if (mutatingDomainNotifications.IsNotEmpty())
{
hasDomainNotification = true;
await ProcessMutatingDomainNotificationsAsync(mutatingDomainNotifications, command, token);
}
if (!hasDomainEvent && !hasDomainNotification)
{
_logger.LogWarning($"The domain command: [Id: {commandId}, Type: {commandType}] apply neither domain event nor generate domain notification for aggregate root: [Id: {aggregateRootStringId}, Type: {aggregateRootTypeFullName}], please confirm whether the state will be lost.");
}
if (command.NeedReplyApplicationCommand())
{
await ReplyApplicationCommandAsync(command, token);
}
}
public void Handle(DomainCommandTransportMessage <TAggregateRootId> message) => HandleAsync(message).SyncRun();
