private async Task <List <Event> > GetAllEventsFromStream(string streamName, long start = StreamPosition.Start)
{
var results = new List <Event>();
StreamEventsSlice currentSlice;
long nextSliceStart = start;
var sliceSize = 200;
using (var connection = _store.Connect())
{
do
{
_logger.Debug($"Getting event slice {nextSliceStart}-{sliceSize} from stream '{streamName}' from the event store.");
currentSlice = await connection.ReadStreamEventsForwardAsync(streamName, nextSliceStart, sliceSize, true);
nextSliceStart = currentSlice.NextEventNumber;
var items = currentSlice.Events.Select(e =>
{
var json = Encoding.ASCII.GetString(e.Event.Data);
if (!_eventDeserializers.ContainsKey(e.Event.EventType))
{
throw new InvalidOperationException($"No event serializer registered for event of type {e.Event.EventType}");
}
var obj = _eventDeserializers[e.Event.EventType](json);
var metaDataJson = Encoding.ASCII.GetString(e.Event.Metadata);
var metaDataObj = JsonConvert.DeserializeObject(metaDataJson);
var metaData = EventMetadata.FromObject(metaDataObj);
_logger.DebugWithContext($"Deserializing metadata for event {e.Event.EventId}", metaDataJson);
_logger.TraceWithContext($"Deserialized metadata for event {e.Event.EventId}", metaData);
var num = e.IsResolved
? e.Link.EventNumber
: e.Event.EventNumber;
obj.SetVersion(num);
obj.SetMetadata(metaData);
return(obj);
});
results.AddRange(items);
} while (!currentSlice.IsEndOfStream);
}
return(results);
}
private async Task <List <EventModel <TId> > > GetAllEventsFromStream(ActionContext context, IEventStoreConnection connection, string streamName, long start = StreamPosition.Start)
{
StreamEventsSlice currentSlice;
long nextSliceStart = start;
var sliceSize = 200;
var data = new List <UnprocessedEventData>();
do
{
context.Logger.Trace($"Getting event slice {nextSliceStart}-{sliceSize} from stream '{streamName}' from the event store.");
currentSlice = await connection.ReadStreamEventsForwardAsync(streamName, nextSliceStart, sliceSize, true);
nextSliceStart = currentSlice.NextEventNumber;
var jsonData = currentSlice.Events.Select(e =>
{
var type = e.Event.EventType;
var bodyJson = Encoding.ASCII.GetString(e.Event.Data);
var metadataJson = Encoding.ASCII.GetString(e.Event.Metadata);
var position = e.IsResolved
? e.Link.EventNumber
: e.Event.EventNumber;
return(new UnprocessedEventData
{
Id = e.Event.EventId,
Type = type,
BodyJson = bodyJson,
MetaJson = metadataJson,
Position = position,
Version = e.Event.EventNumber
});
});
data.AddRange(jsonData);
} while (!currentSlice.IsEndOfStream);
if (data.Any())
{
context.Logger.Information($"{data.Count()} events found since index {start}!");
}
var items = data.Select(e =>
{
context.State.SetParam("eventToDeserialize", e);
if (!_eventDeserializers.ContainsKey(e.Type))
{
throw new InvalidOperationException($"No event deserializer registered for event of type {e.Type}");
}
var metaDataObj = JsonConvert.DeserializeObject(e.MetaJson);
var metaData = EventMetadata.FromObject(metaDataObj);
var model = _eventDeserializers[e.Type](e.BodyJson, metaData, e.Position, e.Version);
return(model);
}).ToList();
context.State.RemoveParam("eventToDeserialize");
context.State.SetParam("events", items);
return(items.ToList());
}
