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// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
part of protobuf;
/// Client side context for [RpcClient]s.
class ClientContext {
/// The desired timeout of the RPC call.
final Duration? timeout;
/// Client-side transport for making calls to a service.
/// Subclasses implement whatever serialization and networking is needed
/// to make a call. They should serialize the request to binary or JSON as
/// appropriate and merge the response into the supplied emptyResponse
/// before returning it.
/// The protoc plugin generates a client-side stub for each service that
/// takes an RpcClient as a constructor parameter.
abstract class RpcClient {
/// Sends a request to a server and returns the reply.
/// The implementation should serialize the request as binary or JSON, as
/// appropriate. It should merge the reply into [emptyResponse] and
/// return it.
Future<T> invoke<T extends GeneratedMessage>(
ClientContext? ctx,
String serviceName,
String methodName,
GeneratedMessage request,
T emptyResponse);