public virtual async Task AppendEvent <TStream>(Guid aggregateId, IEvent @event, int?expectedVersion = null, Func <StreamState, Task> action = null)
{
var version = 1;
var events = await GetEvents(aggregateId);
var versions = events.Select(e => e.Version).ToList();
if (expectedVersion.HasValue)
{
if (versions.Contains(expectedVersion.Value))
{
throw new Exception($"Version '{expectedVersion.Value}' already exists for stream '{aggregateId}'");
}
}
else
{
version = versions.DefaultIfEmpty(0).Max() + 1;
}
var stream = new StreamState
{
AggregateId = aggregateId,
Version = version,
Type = MessageBrokersHelper.GetTypeName(@event.GetType()),
Data = @event == null ? "{}" : JsonConvert.SerializeObject(@event, JSON_SERIALIZER_SETTINGS)
};
await _store.Add(stream);
if (action != null)
{
await action(stream);
}
}
public virtual async Task Publish <T>(T @event) where T : IEvent
{
using (var p = new ProducerBuilder <string, string>(_kafkaOptions.Producer).Build())
{
await p.ProduceAsync(_kafkaOptions.Topic,
new Message <string, string>
{
Key = MessageBrokersHelper.GetTypeName <T>(),
Value = JsonConvert.SerializeObject(@event)
});
}
}
public virtual async Task Commit <TEvent>(TEvent @event) where TEvent : IEvent
{
var outboxMessage = new OutboxMessage
{
Type = MessageBrokersHelper.GetTypeName <TEvent>(),
Data = @event == null ? "{}" : JsonConvert.SerializeObject(@event, new JsonSerializerSettings
{
TypeNameHandling = TypeNameHandling.All
})
};
await Commit(outboxMessage);
}
public virtual async Task AppendEvent <TStream>(Guid streamId, IEvent @event, int?expectedVersion = null, Func <StreamState, Task> action = null)
{
var version = 1;
var events = await GetEvents(streamId);
var versions = events.Select(e => e.Version).ToList();
if (expectedVersion.HasValue)
{
if (versions.Contains(expectedVersion.Value))
{
throw new Exception($"Version '{expectedVersion.Value}' already exists for stream '{streamId}'");
}
}
else
{
version = versions.DefaultIfEmpty(0).Max() + 1;
}
var stream = new StreamState
{
AggregateId = streamId,
Version = version,
Type = MessageBrokersHelper.GetTypeName(@event.GetType()),
Data = @event == null ? "{}" : JsonConvert.SerializeObject(@event, new JsonSerializerSettings
{
TypeNameHandling = TypeNameHandling.All
})
};
await _streamStates.InsertOneAsync(stream);
if (action != null)
{
await action(stream);
}
}
private Action <RawRabbit.Configuration.Exchange.IExchangeDeclarationBuilder> GetExchangeDeclaration(Type type)
{
var name = MessageBrokersHelper.GetTypeName(type);
return(GetExchangeDeclaration(name));
}
