public async Task GetEventsAsync(Func <StoredEvent, Task> callback, string streamFilter = null, string position = null, CancellationToken cancellationToken = default(CancellationToken))
{
var streamName = await connection.CreateProjectionAsync(projectionsManager, prefix, streamFilter);
var sliceStart = ProjectionHelper.ParsePosition(position);
StreamEventsSlice currentSlice;
do
{
currentSlice = await connection.ReadStreamEventsForwardAsync(streamName, sliceStart, ReadPageSize, true);
if (currentSlice.Status == SliceReadStatus.Success)
{
sliceStart = currentSlice.NextEventNumber;
foreach (var resolved in currentSlice.Events)
{
var storedEvent = Formatter.Read(resolved);
await callback(storedEvent);
}
}
}while (!currentSlice.IsEndOfStream && !cancellationToken.IsCancellationRequested);
}
public GetEventStoreSubscription(
IEventStoreConnection eventStoreConnection,
IEventSubscriber eventSubscriber,
ProjectionsManager projectionsManager,
string prefix,
string position,
string streamFilter)
{
Guard.NotNull(eventSubscriber, nameof(eventSubscriber));
this.eventStoreConnection = eventStoreConnection;
this.eventSubscriber = eventSubscriber;
this.position = ProjectionHelper.ParsePositionOrNull(position);
var streamName = eventStoreConnection.CreateProjectionAsync(projectionsManager, prefix, streamFilter).Result;
subscription = SubscribeToStream(streamName);
}