private async ValueTask <ProjectionTargetMetadataCacheEntry> GetMetadataAsync(ProjectionTargetDescriptor <TProjectionId> target,
CancellationToken cancellation)
{
if (!_targetMetadataCache.TryGetValue(target, out var entry))
{
var entryId = ProjectionTargetMetadata.GenerateId(target.TargetId.ToString(), target.TargetType.GetUnqualifiedTypeName());
var metadata = await _database.GetAsync <ProjectionTargetMetadata>(p => p.Id == entryId, cancellation).FirstOrDefault();
var originalMetadata = metadata;
var touched = false;
if (metadata == null)
{
metadata = new ProjectionTargetMetadata
{
TargetId = target.TargetId,
TargetType = target.TargetType.GetUnqualifiedTypeName()
};
touched = true;
}
entry = new ProjectionTargetMetadataCacheEntry(originalMetadata, metadata, touched);
_targetMetadataCache.Add(target, entry);
}
return(entry);
}
public ProjectionTargetMetadataCacheEntry(ProjectionTargetMetadata originalMetadata,
ProjectionTargetMetadata metadata,
bool touched)
{
if (originalMetadata == null && metadata == null)
{
touched = false;
}
OriginalMetadata = originalMetadata;
Metadata = metadata;
Touched = touched;
}
private bool MatchesByRevision(ProjectionTargetMetadata original, ProjectionTargetMetadata comparand)
{
if (original is null)
{
return(comparand is null);
}
if (comparand is null)
{
return(false);
}
return(original.MetadataRevision == comparand.MetadataRevision);
}
private async ValueTask <ProjectionTargetMetadataCacheEntry> GetMetadataAsync(ProjectionTargetDescriptor target,
CancellationToken cancellation)
{
if (!_targetMetadataCache.TryGetValue(target, out var entry))
{
var entryId = ProjectionTargetMetadata.GenerateId(target.TargetId, target.TargetType.GetUnqualifiedTypeName());
var metadata = await _database.GetAsync <ProjectionTargetMetadata>(p => p.Id == entryId, cancellation).FirstOrDefault();
entry = new ProjectionTargetMetadataCacheEntry(metadata, metadata, touched: false);
if (metadata != null)
{
_targetMetadataCache.Add(target, entry);
}
}
return(entry);
}
public void Deconstruct(out ProjectionTargetMetadata originalMetadata,
out ProjectionTargetMetadata metadata)
{
originalMetadata = OriginalMetadata;
metadata = Metadata;
}
