public async Task<HttpResponseMessage> Manifest(string id)
{
var canonicalFilename = FileHeader.Canonize(id);
FileAndPagesInformation fileAndPages = null;
Storage.Batch(accessor => fileAndPages = accessor.GetFile(canonicalFilename, 0, 0));
long? fileLength = fileAndPages.TotalSize;
using (var signatureRepository = new StorageSignatureRepository(Storage, canonicalFilename))
{
var rdcManager = new LocalRdcManager(signatureRepository, Storage, SigGenerator);
var signatureManifest = await rdcManager.GetSignatureManifestAsync(
new DataInfo
{
Name = canonicalFilename,
LastModified = fileAndPages.Metadata.Value<DateTime>(Constants.RavenLastModified).ToUniversalTime()
});
signatureManifest.FileLength = fileLength ?? 0;
Log.Debug("Signature manifest for a file '{0}' was downloaded. Signatures count was {1}", id, signatureManifest.Signatures.Count);
return GetMessageWithObject(signatureManifest)
.WithNoCache();
}
}
public override async Task<SynchronizationReport> PerformAsync(ISynchronizationServerClient synchronizationServerClient)
{
AssertLocalFileExistsAndIsNotConflicted(FileMetadata);
var destinationMetadata = await synchronizationServerClient.GetMetadataForAsync(FileName);
if (destinationMetadata == null)
{
// if file doesn't exist on destination server - upload it there
return await UploadToAsync(synchronizationServerClient);
}
var destinationServerRdcStats = await synchronizationServerClient.GetRdcStatsAsync();
if (!IsRemoteRdcCompatible(destinationServerRdcStats))
throw new SynchronizationException("Incompatible RDC version detected on destination server");
var conflict = CheckConflictWithDestination(FileMetadata, destinationMetadata, FileSystemInfo.Url);
if (conflict != null)
{
var report = await HandleConflict(synchronizationServerClient, conflict, log);
if (report != null)
return report;
}
using (var localSignatureRepository = new StorageSignatureRepository(Storage, FileName))
using (var remoteSignatureCache = new VolatileSignatureRepository(FileName))
{
var localRdcManager = new LocalRdcManager(localSignatureRepository, Storage, sigGenerator);
var destinationRdcManager = new RemoteRdcManager(synchronizationServerClient, localSignatureRepository, remoteSignatureCache);
log.Debug("Starting to retrieve signatures of a local file '{0}'.", FileName);
Cts.Token.ThrowIfCancellationRequested();
// first we need to create a local file signatures before we synchronize with remote ones
var localSignatureManifest = await localRdcManager.GetSignatureManifestAsync(FileDataInfo);
log.Debug("Number of a local file '{0}' signatures was {1}.", FileName, localSignatureManifest.Signatures.Count);
if (localSignatureManifest.Signatures.Any())
{
var destinationSignatureManifest = await destinationRdcManager.SynchronizeSignaturesAsync(FileDataInfo, Cts.Token);
if (destinationSignatureManifest.Signatures.Any())
{
return await SynchronizeTo(synchronizationServerClient, localSignatureRepository, remoteSignatureCache, localSignatureManifest, destinationSignatureManifest);
}
}
return await UploadToAsync(synchronizationServerClient);
}
}