blob: 52e3e5d45056c2d77e885bd021caf9ae66a7902e [file] [log] [blame]
// Copyright (c) 2012 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 <memory>
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "remoting/protocol/errors.h"
#include "remoting/protocol/message_pipe.h"
namespace remoting {
class CompoundBuffer;
namespace protocol {
class MessageChannelFactory;
// Base class for channel message dispatchers. It's responsible for
// creating the named channel. Derived dispatchers then dispatch
// incoming messages on this channel as well as send outgoing
// messages.
class ChannelDispatcherBase : public MessagePipe::EventHandler {
class EventHandler {
EventHandler() {}
virtual ~EventHandler() {}
// Called after the channel is initialized.
virtual void OnChannelInitialized(
ChannelDispatcherBase* channel_dispatcher) = 0;
// Called after the channel is closed.
virtual void OnChannelClosed(ChannelDispatcherBase* channel_dispatcher) = 0;
~ChannelDispatcherBase() override;
// Creates and connects the channel using |channel_factory|.
void Init(MessageChannelFactory* channel_factory,
EventHandler* event_handler);
// Initializes the channel using |message_pipe| that's already connected.
void Init(std::unique_ptr<MessagePipe> message_pipe,
EventHandler* event_handler);
const std::string& channel_name() { return channel_name_; }
// Returns true if the channel is currently connected.
bool is_connected() { return is_connected_; }
explicit ChannelDispatcherBase(const std::string& channel_name);
MessagePipe* message_pipe() { return message_pipe_.get(); }
// Child classes must override this method to handle incoming messages.
virtual void OnIncomingMessage(std::unique_ptr<CompoundBuffer> message) = 0;
void OnChannelReady(std::unique_ptr<MessagePipe> message_pipe);
// MessagePipe::EventHandler interface.
void OnMessagePipeOpen() override;
void OnMessageReceived(std::unique_ptr<CompoundBuffer> message) override;
void OnMessagePipeClosed() override;
std::string channel_name_;
MessageChannelFactory* channel_factory_ = nullptr;
EventHandler* event_handler_ = nullptr;
bool is_connected_ = false;
std::unique_ptr<MessagePipe> message_pipe_;
} // namespace protocol
} // namespace remoting