Pull out common code from client and host versions of LogToServer

remoting/client/client_status_logger.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_CLIENT_STATUS_LOGGER_H_
+#define REMOTING_CLIENT_CLIENT_STATUS_LOGGER_H_
+
+#include "base/threading/non_thread_safe.h"
+#include "base/time/time.h"
+#include "remoting/jingle_glue/log_to_server.h"
+#include "remoting/protocol/connection_to_host.h"
+#include "remoting/protocol/errors.h"
+
+namespace remoting {
+
+class ChromotingStats;
+
+// ClientStatusLogger sends client log entries to a server.
+// The contents of the log entries are described in server_log_entry_client.cc.
+// They do not contain any personally identifiable information.
+class ClientStatusLogger : public base::NonThreadSafe {
+ public:
+  ClientStatusLogger(ServerLogEntry::Mode mode,
+                     SignalStrategy* signal_strategy,
+                     const std::string& directory_bot_jid);
+  ~ClientStatusLogger();
+
+  void LogSessionStateChange(protocol::ConnectionToHost::State state,
+                             protocol::ErrorCode error);
+  void LogStatistics(remoting::ChromotingStats* statistics);
+
+  // Allows test code to fake SignalStrategy state change events.
+  void SetSignalingStateForTest(SignalStrategy::State state);
+
+ private:
+  LogToServer log_to_server_;
+
+  // Generates a new random session ID.
+  void GenerateSessionId();
+
+  // Expire the session ID if the maximum duration has been exceeded.
+  void MaybeExpireSessionId();
+
+  // 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(ClientStatusLogger);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_CLIENT_CLIENT_STATUS_LOGGER_H_