/// <summary>
/// Tells the transfer service that transmission is being
/// paused for an unknown period of time. This should keep
/// the transfer enabled, but gives the service time to
/// free or unlock resources.
/// </summary>
/// <param name="transferId">Identifies the transfer and resource.</param>
/// <exception cref="UnknownTransferException">In case no such transfer
/// is currently maintained.</exception>
public virtual void PauseTransfer(string transferId)
{
var context = IsUploadService
? FileSystemTask.UploadTransferPauseRequest
: FileSystemTask.DownloadTransferPauseRequest;
TTransfer transfer = GetCachedTransfer(transferId, true, context);
lock (transfer.SyncRoot)
{
if (!transfer.Status.Is(TransferStatus.Starting, TransferStatus.Running))
{
AuditEvent auditEvent = AuditEvent.InvalidTransferStatusChange;
AuditHelper.AuditInvalidTransferPauseRequest(Auditor, transfer, context, auditEvent);
string msg = "Only active transfers can be paused. Current status is: [{0}].";
msg = String.Format(msg, transfer.Status);
throw new TransferStatusException(msg)
{
IsAudited = true, EventId = (int)auditEvent
};
}
PauseTransferImpl(transfer);
transfer.Status = TransferStatus.Paused;
AuditHelper.AuditChangedTransferStatus(Auditor, transfer, context, AuditEvent.TransferPaused);
}
}