public async Task RemoveEntityFromProjectionAsync(ProjectionSourceDescriptor projectionSource,
ProjectionTargetDescriptor removedProjection,
CancellationToken cancellation)
{
var(originalMetadata, metadata) = await GetMetadataAsync(removedProjection, cancellation);
if (metadata == null)
{
Assert(false);
return;
}
var removed = metadata.ProjectionSources
.RemoveFirstWhere(p => p.Id == projectionSource.SourceId &&
p.Type == projectionSource.SourceType.GetUnqualifiedTypeName());
Assert(removed != null);
if (!metadata.ProjectionSources.Any())
{
_targetMetadataCache[removedProjection] = new ProjectionTargetMetadataCacheEntry(originalMetadata,
metadata: null,
touched: true);
var predicate = DataPropertyHelper.BuildPredicate <TProjectionId, TProjection>(metadata.TargetId);
var projection = await _database.GetAsync(predicate, cancellation).FirstOrDefault();
if (projection != null)
{
_targetsToDelete.Add(projection);
//await _database.RemoveAsync(projection, cancellation);
}
}
_targetMetadataCache[removedProjection] = new ProjectionTargetMetadataCacheEntry(originalMetadata,
metadata,
touched: true);
}
public Task <ISnapshot> GetSnapshotAsync(string bucketId, string streamId, long maxRevision = default, CancellationToken cancellation = default)
{
if (maxRevision < 0)
{
throw new ArgumentOutOfRangeException(nameof(maxRevision));
}
Expression <Func <Snapshot, bool> > predicate;
if (maxRevision == default)
{
predicate = snapshot => snapshot.BucketId.Equals(bucketId) &&
snapshot.StreamId.Equals(streamId);
}
else
{
predicate = snapshot => snapshot.BucketId.Equals(bucketId) &&
snapshot.StreamId.Equals(streamId) &&
snapshot.StreamRevision <= maxRevision;
}
return(_database.GetAsync(predicate, cancellation)
.OrderByDescending(snapshot => snapshot.StreamRevision)
.Cast <ISnapshot>()
.FirstOrDefault(cancellation));
}