func wait(client *speech.Client, opName string) (*speechpb.AsyncRecognizeResponse, error) {
ctx := context.Background()
opClient := longrunningpb.NewOperationsClient(client.Connection())
var op *longrunningpb.Operation
var err error
for {
op, err = opClient.GetOperation(ctx, &longrunningpb.GetOperationRequest{
Name: opName,
})
if err != nil {
return nil, err
}
if op.Done {
break
}
time.Sleep(500 * time.Millisecond)
}
switch {
case op.GetError() != nil:
return nil, fmt.Errorf("recieved error in response: %v", op.GetError())
case op.GetResponse() != nil:
var resp speechpb.AsyncRecognizeResponse
if err := proto.Unmarshal(op.GetResponse().Value, &resp); err != nil {
return nil, err
}
return &resp, nil
}
// should never happen.
return nil, errors.New("no response")
}
// InternalNewOperation is for use by the google Cloud Libraries only.
//
// InternalNewOperation returns an long-running operation, abstracting the raw pb.Operation.
// The conn parameter refers to a server that proto was received from.
func InternalNewOperation(conn *grpc.ClientConn, proto *pb.Operation) *Operation {
return &Operation{
c: pb.NewOperationsClient(conn),
proto: proto,
}
}