Appending an event to the outbox

It is possible to append directly to the outbox. However this can become hard to maintain or complex to get right, so recommend looking at projections for the same purpose.

If appending directly is the correct approach for your use case, it is very similar to how the appending to event log works. You can do this anywhere you can take a dependency to the IEventOutbox type from the Aksio.Cratis.Events namespace. For instance, that could be directly in your domain or in an observer that is reacting to private events. The latter would make it more decouple and is probably preferred from a systems maintenance perspective.

Below is an example of

using Aksio.Cratis.Events;

public class DebitAccountsBalance
{
    readonly IEventOutbox _eventOutbox;

    public DebitAccounts(IEventOutbox eventOutbox) => _eventOutbox = eventOutbox;

    public Task BalanceChanged(AccountId accountId, double amount) => _eventOutbox.Append(context.EventSourceId, new AccountBalance(Name, Owner));
}