public async Task WriteSnapshot(Messages.RoadNetworkSnapshot snapshot, int version, CancellationToken cancellationToken)
{
var snapshotBlobName = SnapshotPrefix.Append(new BlobName(version.ToString()));
using (var stream = _streamManager.GetStream())
{
await MessagePackSerializer.SerializeAsync(stream, snapshot, cancellationToken : cancellationToken);
stream.Position = 0;
await _client.CreateBlobAsync(
snapshotBlobName,
Metadata.None.AtVersion(version),
MessagePackContentType,
stream,
cancellationToken);
}
if (await _client.BlobExistsAsync(SnapshotHead, cancellationToken))
{
await _client.DeleteBlobAsync(SnapshotHead, cancellationToken);
}
var snapshotHead = new Messages.RoadNetworkSnapshotHead
{
SnapshotBlobName = snapshotBlobName.ToString()
};
using (var stream = _streamManager.GetStream())
{
await MessagePackSerializer.SerializeAsync(stream, snapshotHead, cancellationToken : cancellationToken);
stream.Position = 0;
await _client.CreateBlobAsync(
SnapshotHead,
Metadata.None,
MessagePackContentType,
stream,
cancellationToken);
}
}
public RoadNetworkView RestoreFromSnapshot(Messages.RoadNetworkSnapshot snapshot)
{
if (snapshot == null)
{
throw new ArgumentNullException(nameof(snapshot));
}
return(new RoadNetworkView(
snapshot.Nodes.ToImmutableDictionary(node => new RoadNodeId(node.Id),
node => new RoadNode(new RoadNodeId(node.Id), GeometryTranslator.Translate(node.Geometry))),
snapshot.Segments.ToImmutableDictionary(segment => new RoadSegmentId(segment.Id),
segment => new RoadSegment(new RoadSegmentId(segment.Id),
GeometryTranslator.Translate(segment.Geometry), new RoadNodeId(segment.StartNodeId),
new RoadNodeId(segment.EndNodeId), AttributeHash.FromHashCode(segment.AttributeHash))),
new RoadNodeId(snapshot.MaximumNodeId),
new RoadSegmentId(snapshot.MaximumSegmentId),
new GradeSeparatedJunctionId(snapshot.MaximumGradeSeparatedJunctionId),
new AttributeId(snapshot.MaximumEuropeanRoadAttributeId),
new AttributeId(snapshot.MaximumNationalRoadAttributeId),
new AttributeId(snapshot.MaximumNumberedRoadAttributeId),
new AttributeId(snapshot.MaximumLaneAttributeId),
new AttributeId(snapshot.MaximumWidthAttributeId),
new AttributeId(snapshot.MaximumSurfaceAttributeId),
snapshot.SegmentReusableLaneAttributeIdentifiers.ToImmutableDictionary(
segment => new RoadSegmentId(segment.SegmentId),
segment => (IReadOnlyList <AttributeId>)segment.ReusableAttributeIdentifiers
.Select(identifier => new AttributeId(identifier)).ToArray()),
snapshot.SegmentReusableWidthAttributeIdentifiers.ToImmutableDictionary(
segment => new RoadSegmentId(segment.SegmentId),
segment => (IReadOnlyList <AttributeId>)segment.ReusableAttributeIdentifiers
.Select(identifier => new AttributeId(identifier)).ToArray()),
snapshot.SegmentReusableSurfaceAttributeIdentifiers.ToImmutableDictionary(
segment => new RoadSegmentId(segment.SegmentId),
segment => (IReadOnlyList <AttributeId>)segment.ReusableAttributeIdentifiers
.Select(identifier => new AttributeId(identifier)).ToArray())
));
}
