// Copyright (c) 2012 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 ASH_DBUS_LIVENESS_SERVICE_PROVIDER_H_ #define ASH_DBUS_LIVENESS_SERVICE_PROVIDER_H_ #include #include "base/compiler_specific.h" #include "base/memory/ref_counted.h" #include "base/memory/weak_ptr.h" #include "chromeos/ash/components/dbus/services/cros_dbus_service.h" #include "dbus/exported_object.h" namespace dbus { class MethodCall; } namespace ash { // This class exports a "CheckLiveness" D-Bus method that the session manager // calls periodically to confirm that Chrome's UI thread is responsive to D-Bus // messages. It can be tested with the following command: // // % dbus-send --system --type=method_call --print-reply // --dest=org.chromium.LivenessService // /org/chromium/LivenessService // org.chromium.LivenessServiceInterface.CheckLiveness // // -> method return sender=:1.9 -> dest=:1.27 reply_serial=2 // // (An empty response should be returned.) class LivenessServiceProvider : public CrosDBusService::ServiceProviderInterface { public: LivenessServiceProvider(); LivenessServiceProvider(const LivenessServiceProvider&) = delete; LivenessServiceProvider& operator=(const LivenessServiceProvider&) = delete; ~LivenessServiceProvider() override; // CrosDBusService::ServiceProviderInterface overrides: void Start(scoped_refptr exported_object) override; private: // Called from ExportedObject when CheckLiveness() is exported as a D-Bus // method or failed to be exported. void OnExported(const std::string& interface_name, const std::string& method_name, bool success); // Called on UI thread in response to a D-Bus request. void CheckLiveness(dbus::MethodCall* method_call, dbus::ExportedObject::ResponseSender response_sender); // Keep this last so that all weak pointers will be invalidated at the // beginning of destruction. base::WeakPtrFactory weak_ptr_factory_{this}; }; } // namespace ash #endif // ASH_DBUS_LIVENESS_SERVICE_PROVIDER_H_