@Override
 public void fillOperationMetrics(AllOperationMetrics metrics) {
   metrics.GET = ExternalOperationMetrics.create(_getMetrics);
   metrics.PUT = ExternalOperationMetrics.create(_putMetrics);
   metrics.DELETE = ExternalOperationMetrics.create(_deleteMetrics);
   _storeHandler.augmentOperationMetrics(metrics);
 }
 protected ServletServiceResponse _handleDelete(
     ServletServiceRequest request,
     ServletServiceResponse response,
     OperationDiagnostics stats,
     K key)
     throws IOException {
   response = (ServletServiceResponse) _storeHandler.removeEntry(request, response, key, stats);
   _addStdHeaders(response);
   return response;
 }
 protected ServletServiceResponse _handlePut(
     ServletServiceRequest request,
     ServletServiceResponse response,
     OperationDiagnostics stats,
     K key)
     throws IOException {
   response =
       (ServletServiceResponse)
           _storeHandler.putEntry(request, response, key, request.getInputStream(), stats);
   _addStdHeaders(response);
   return response;
 }