remoting/host/native_messaging/log_message_handler.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef REMOTING_HOST_NATIVE_MESSAGIN_LOG_HANDLER_H_
   6 #define REMOTING_HOST_NATIVE_MESSAGIN_LOG_HANDLER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "base/values.h"
  11
  12 namespace remoting {
  13
  14 // Helper class for logging::SetLogMessageHandler to deliver log messages to
  15 // a consistent thread in a thread-safe way and in a format suitable for sending
  16 // over a Native Messaging channel.
  17 class LogMessageHandler {
  18  public:
  19   typedef base::Callback<void (scoped_ptr<base::Value> message)> Delegate;
  20
  21   explicit LogMessageHandler(const Delegate& delegate);
  22   ~LogMessageHandler();
  23
  24   static const char* kDebugMessageTypeName;
  25
  26  private:
  27   static bool OnLogMessage(
  28       int severity, const char* file, int line,
  29       size_t message_start, const std::string& str);
  30   void PostLogMessageToCorrectThread(
  31       int severity, const char* file, int line,
  32       size_t message_start, const std::string& str);
  33   void SendLogMessageToClient(
  34       int severity, const char* file, int line,
  35       size_t message_start, const std::string& str);
  36
  37   Delegate delegate_;
  38   bool suppress_logging_;
  39   scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
  40   logging::LogMessageHandlerFunction previous_log_message_handler_;
  41   base::WeakPtrFactory<LogMessageHandler> weak_ptr_factory_;
  42 };
  43
  44 }  // namespace remoting
  45
  46 #endif