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// Copyright 2015 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 BLIMP_NET_CLIENT_CONNECTION_MANAGER_H_
#define BLIMP_NET_CLIENT_CONNECTION_MANAGER_H_
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "blimp/net/blimp_net_export.h"
#include "blimp/net/connection_error_observer.h"
namespace blimp {
class BlimpConnection;
class BlimpTransport;
class ConnectionHandler;
// Coordinates the channel creation and authentication workflows for
// outgoing (Client) network connections.
//
// TODO(haibinlu): cope with network changes that may potentially affect the
// endpoint that we're trying to connect to.
class BLIMP_NET_EXPORT ClientConnectionManager
: public ConnectionErrorObserver {
public:
// Caller is responsible for ensuring that |connection_handler|
// outlives |this|.
explicit ClientConnectionManager(ConnectionHandler* connection_handler);
~ClientConnectionManager() override;
// Adds a transport. All transports are expected to be added before invoking
// |Connect|.
void AddTransport(scoped_ptr<BlimpTransport> transport);
// Attempts to create a connection using any of the BlimpTransports in
// |transports_|.
// This will result in the handler being called back at-most-once.
//
// This is also a placeholder for automatic reconnection logic for common
// cases such as network switches, online/offline changes.
void Connect();
// Sets the client token to use in the authentication message.
void set_client_token(const std::string& client_token) {
client_token_ = client_token;
}
private:
// Tries to connect using the BlimpTransport specified at |transport_index|.
void Connect(int transport_index);
// Callback invoked by transports_[transport_index] to indicate that it has a
// connection ready to be authenticated or there is an error.
void OnConnectResult(int transport_index, int result);
// Sends authentication message to the engine via |connection|.
void SendAuthenticationMessage(scoped_ptr<BlimpConnection> connection);
// Invoked after the authentication message is sent to |connection|.
// The result of the write operation is passed via |result|.
void OnAuthenticationMessageSent(scoped_ptr<BlimpConnection> connection,
int result);
// ConnectionErrorObserver implementation.
void OnConnectionError(int error) override;
std::string client_token_;
ConnectionHandler* connection_handler_;
std::vector<scoped_ptr<BlimpTransport>> transports_;
base::WeakPtrFactory<ClientConnectionManager> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(ClientConnectionManager);
};
} // namespace blimp
#endif // BLIMP_NET_CLIENT_CONNECTION_MANAGER_H_
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