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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_PROTOCOL_STREAM_CHANNEL_FACTORY_H_
#define REMOTING_PROTOCOL_STREAM_CHANNEL_FACTORY_H_
#include <memory>
#include <string>
#include "base/functional/callback.h"
#include "base/sequence_checker.h"
namespace remoting::protocol {
class P2PStreamSocket;
class StreamChannelFactory {
public:
// TODO(sergeyu): Specify connection error code when channel
// connection fails.
typedef base::OnceCallback<void(std::unique_ptr<P2PStreamSocket>)>
ChannelCreatedCallback;
StreamChannelFactory() = default;
StreamChannelFactory(const StreamChannelFactory&) = delete;
StreamChannelFactory& operator=(const StreamChannelFactory&) = delete;
// Creates new channels and calls the |callback| when then new channel is
// created and connected. The |callback| is called with nullptr if connection
// failed for any reason. Callback may be called synchronously, before the
// call returns. All channels must be destroyed, and CancelChannelCreation()
// called for any pending channels, before the factory is destroyed.
virtual void CreateChannel(const std::string& name,
ChannelCreatedCallback callback) = 0;
// Cancels a pending CreateChannel() operation for the named channel. If the
// channel creation already completed then canceling it has no effect. When
// shutting down this method must be called for each channel pending creation.
virtual void CancelChannelCreation(const std::string& name) = 0;
protected:
virtual ~StreamChannelFactory() = default;
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace remoting::protocol
#endif // REMOTING_PROTOCOL_STREAM_CHANNEL_FACTORY_H_
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