private async Task <ProjectionStream> LoadProjectionStreamAsync(Type projectionType, ProjectionVersion version, IBlobId projectionId, SnapshotMeta snapshotMeta)
{
ISnapshot loadedSnapshot = await snapshotStore.LoadAsync(version.ProjectionName, projectionId, version).ConfigureAwait(false);
Func <ISnapshot> loadSnapshot = () => projectionType.IsSnapshotable()
? loadedSnapshot
: new NoSnapshot(projectionId, version.ProjectionName);
return(await LoadProjectionStreamAsync(version, projectionId, snapshotMeta, loadSnapshot).ConfigureAwait(false));
}
async Task <ProjectionStream> LoadProjectionStreamAsync(Type projectionType, IBlobId projectionId)
{
string projectionName = projectionType.GetContractId();
ReadResult <ProjectionVersions> result = GetProjectionVersions(projectionName);
if (result.IsSuccess)
{
ProjectionVersion liveVersion = result.Data.GetLive();
if (liveVersion is null)
{
log.Warn(() => $"Unable to find projection `live` version. ProjectionId:{projectionId} ProjectionName:{projectionName} ProjectionType:{projectionType.Name}{Environment.NewLine}AvailableVersions:{Environment.NewLine}{result.Data.ToString()}");
return(ProjectionStream.Empty());
}
ISnapshot snapshot = null;
if (projectionType.IsSnapshotable())
{
snapshot = await snapshotStore.LoadAsync(projectionName, projectionId, liveVersion).ConfigureAwait(false);
}
else
{
snapshot = new NoSnapshot(projectionId, projectionName);
}
ProjectionStream stream = await LoadProjectionStreamAsync(projectionType, liveVersion, projectionId, snapshot);
return(stream);
}
return(ProjectionStream.Empty());
}