blob: 1b289d217499c55c3e582e1db15dca7d69c3bca9 [file] [log] [blame]
// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <list>
#include <memory>
#include "base/callback_forward.h"
#include "base/macros.h"
#include "remoting/proto/ftl/v1/ftl_messages.pb.h"
#include "third_party/grpc/src/include/grpcpp/support/status.h"
namespace remoting {
class ScopedGrpcServerStream;
// Interface for starting or closing the server stream to receive messages from
// FTL backend.
class MessageReceptionChannel {
using StreamOpener =
base::OnceClosure on_channel_ready,
const base::RepeatingCallback<void(
const ftl::ReceiveMessagesResponse&)>& on_incoming_msg,
base::OnceCallback<void(const grpc::Status&)> on_channel_closed)>;
using MessageCallback =
base::RepeatingCallback<void(const ftl::InboxMessage&)>;
using DoneCallback = base::OnceCallback<void(const grpc::Status& status)>;
MessageReceptionChannel() = default;
virtual ~MessageReceptionChannel() = default;
virtual void Initialize(const StreamOpener& stream_opener,
const MessageCallback& on_incoming_msg) = 0;
// Opens a server streaming channel to the FTL API to enable message reception
// over the fast path.
// |on_ready| is called once the stream is successfully started.
// |on_closed| is called if the stream fails to start, in which case
// |on_ready| will not be called, or when the stream is closed or dropped,
// in which case it is called after |on_ready| is called.
virtual void StartReceivingMessages(base::OnceClosure on_ready,
DoneCallback on_closed) = 0;
// Closes the streaming channel.
virtual void StopReceivingMessages() = 0;
// Returns true if the streaming channel is open.
virtual bool IsReceivingMessages() const = 0;
} // namespace remoting