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// 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.
#ifndef REMOTING_PROTOCOL_CHANNEL_DISPATCHER_BASE_H_
#define REMOTING_PROTOCOL_CHANNEL_DISPATCHER_BASE_H_
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "remoting/protocol/errors.h"
namespace remoting {
class CompoundBuffer;
namespace protocol {
class MessageChannelFactory;
class MessagePipe;
// 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:
class EventHandler {
public:
EventHandler() {}
virtual ~EventHandler() {}
virtual void OnChannelInitialized(
ChannelDispatcherBase* channel_dispatcher) = 0;
};
// The callback is called when initialization is finished. The
// parameter is set to true on success.
typedef base::Callback<void(bool)> InitializedCallback;
virtual ~ChannelDispatcherBase();
// Creates and connects the channel in the specified
// |session|. Caller retains ownership of the Session.
void Init(MessageChannelFactory* channel_factory,
EventHandler* event_handler);
const std::string& channel_name() { return channel_name_; }
// Returns true if the channel is currently connected.
bool is_connected() { return message_pipe() != nullptr; }
protected:
explicit ChannelDispatcherBase(const char* channel_name);
MessagePipe* message_pipe() { return message_pipe_.get(); }
// Child classes must override this method to handle incoming messages.
virtual void OnIncomingMessage(scoped_ptr<CompoundBuffer> message) = 0;
private:
void OnChannelReady(scoped_ptr<MessagePipe> message_pipe);
void OnPipeError(int error);
std::string channel_name_;
MessageChannelFactory* channel_factory_ = nullptr;
EventHandler* event_handler_ = nullptr;
scoped_ptr<MessagePipe> message_pipe_;
DISALLOW_COPY_AND_ASSIGN(ChannelDispatcherBase);
};
} // namespace protocol
} // namespace remoting
#endif // REMOTING_PROTOCOL_CHANNEL_DISPATCHER_BASE_H_
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