/// <summary>
/// Releases the resources associated with the backup
/// </summary>
public void Dispose()
{
if (this.uploader != null)
this.uploader.Dispose();
this.uploader = null;
}
/// <summary>
/// Adds a file to the archive
/// </summary>
/// <param name="entry">
/// The backup metadata for the file
/// </param>
/// <param name="stream">
/// The file stream to add to the archive
/// </param>
public void Backup(Backup.Entry entry, Stream stream)
{
// if we are not currently uploading a vault archive,
// then attach a new uploader and create a blob for it
if (this.uploader == null)
{
this.uploader = new GlacierUploader(
this.archive.Glacier,
this.archive.Vault
);
this.archive.BackupIndex.InsertBlob(
new Backup.Blob()
{
Name = this.uploader.UploadID
}
);
}
// fetch the upload blob and sync it with the uploader's offset
var blob = this.archive.BackupIndex.LookupBlob(this.uploader.UploadID);
if (blob.Length != this.uploader.Length)
blob.Length = this.uploader.Resync(blob.Length);
// upload the incoming stream and update the backup entry
var offset = this.uploader.Length;
var length = this.uploader.Upload(stream);
entry.Blob = blob;
entry.Offset = offset;
entry.Length = length;
}
/// <summary>
/// Commits the current vault archive to Glacier
/// </summary>
public void Checkpoint()
{
if (this.uploader != null)
{
// complete the vault archive and update the blob
var blob = this.archive.BackupIndex.LookupBlob(this.uploader.UploadID);
this.uploader.Flush();
blob.Length = this.uploader.Length;
var archiveID = this.uploader.Complete();
blob.Name = archiveID;
this.archive.BackupIndex.UpdateBlob(blob);
// detach the uploader for the current vault archive
this.uploader.Dispose();
this.uploader = null;
}
this.archive.Save();
}