Implement stats reporting in Android client

remoting/client/log_to_server.h

+// Copyright 2014 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_CLIENT_LOG_TO_SERVER_H_
+#define REMOTING_CLIENT_LOG_TO_SERVER_H_
+
+#include <deque>
+#include <map>
+#include <string>
+
+#include "base/threading/non_thread_safe.h"
+#include "base/time/time.h"
+#include "remoting/client/server_log_entry.h"
+#include "remoting/jingle_glue/signal_strategy.h"
+#include "remoting/protocol/connection_to_host.h"
+#include "remoting/protocol/errors.h"
+
+namespace buzz {
+class XmlElement;
+}  // namespace buzz
+
+namespace remoting {
+
+class ChromotingStats;
+class IqSender;
+
+// Temporary namespace to prevent conflict with the same-named class in
+// remoting/host when linking unittests.
+//
+// TODO(lambroslambrou): Remove this and factor out any shared code.
+namespace client {
+
+// LogToServer sends log entries to a server.
+// The contents of the log entries are described in server_log_entry.cc.
+// They do not contain any personally identifiable information.
+class LogToServer : public base::NonThreadSafe,
+                    public SignalStrategy::Listener {
+ public:
+  LogToServer(ServerLogEntry::Mode mode,
+              SignalStrategy* signal_strategy,
+              const std::string& directory_bot_jid);
+  virtual ~LogToServer();
+
+  // Logs a session state change.
+  void LogSessionStateChange(protocol::ConnectionToHost::State state,
+                             protocol::ErrorCode error);
+  void LogStatistics(remoting::ChromotingStats* statistics);
+
+  // SignalStrategy::Listener interface.
+  virtual void OnSignalStrategyStateChange(
+      SignalStrategy::State state) OVERRIDE;
+  virtual bool OnSignalStrategyIncomingStanza(
+      const buzz::XmlElement* stanza) OVERRIDE;
+
+ private:
+  void Log(const ServerLogEntry& entry);
+  void SendPendingEntries();
+
+  // Generates a new random session ID.
+  void GenerateSessionId();
+
+  // Expire the session ID if the maximum duration has been exceeded.
+  void MaybeExpireSessionId();
+
+  ServerLogEntry::Mode mode_;
+  SignalStrategy* signal_strategy_;
+  scoped_ptr<IqSender> iq_sender_;
+  std::string directory_bot_jid_;
+
+  std::deque<ServerLogEntry> pending_entries_;
+
+  // A randomly generated session ID to be attached to log messages. This
+  // is regenerated at the start of a new session.
+  std::string session_id_;
+
+  // Start time of the session.
+  base::TimeTicks session_start_time_;
+
+  // Time when the session ID was generated.
+  base::TimeTicks session_id_generation_time_;
+
+  DISALLOW_COPY_AND_ASSIGN(LogToServer);
+};
+
+}  // namespace client
+
+}  // namespace remoting
+
+#endif  // REMOTING_CLIENT_LOG_TO_SERVER_H_