1// Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_DBUS_LIVENESS_SERVICE_PROVIDER_H_ 6#define CHROME_BROWSER_CHROMEOS_DBUS_LIVENESS_SERVICE_PROVIDER_H_ 7 8#include <string> 9 10#include "base/basictypes.h" 11#include "base/compiler_specific.h" 12#include "base/memory/ref_counted.h" 13#include "base/memory/weak_ptr.h" 14#include "chrome/browser/chromeos/dbus/cros_dbus_service.h" 15#include "dbus/exported_object.h" 16 17namespace dbus { 18class MethodCall; 19class Response; 20} 21 22namespace chromeos { 23 24// This class exports a "CheckLiveness" D-Bus method that the session manager 25// calls periodically to confirm that Chrome's UI thread is responsive to D-Bus 26// messages. It can be tested with the following command: 27// 28// % dbus-send --system --type=method_call --print-reply 29// --dest=org.chromium.LibCrosService 30// /org/chromium/LibCrosService 31// org.chromium.LibCrosServiceInterface.CheckLiveness 32// 33// -> method return sender=:1.9 -> dest=:1.27 reply_serial=2 34// 35// (An empty response should be returned.) 36class LivenessServiceProvider 37 : public CrosDBusService::ServiceProviderInterface { 38 public: 39 LivenessServiceProvider(); 40 virtual ~LivenessServiceProvider(); 41 42 // CrosDBusService::ServiceProviderInterface overrides: 43 virtual void Start( 44 scoped_refptr<dbus::ExportedObject> exported_object) OVERRIDE; 45 46 private: 47 // Called from ExportedObject when CheckLiveness() is exported as a D-Bus 48 // method or failed to be exported. 49 void OnExported(const std::string& interface_name, 50 const std::string& method_name, 51 bool success); 52 53 // Called on UI thread in response to a D-Bus request. 54 void CheckLiveness(dbus::MethodCall* method_call, 55 dbus::ExportedObject::ResponseSender response_sender); 56 57 // Keep this last so that all weak pointers will be invalidated at the 58 // beginning of destruction. 59 base::WeakPtrFactory<LivenessServiceProvider> weak_ptr_factory_; 60 61 DISALLOW_COPY_AND_ASSIGN(LivenessServiceProvider); 62}; 63 64} // namespace chromeos 65 66#endif // CHROME_BROWSER_CHROMEOS_DBUS_LIVENESS_SERVICE_PROVIDER_H_ 67