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- // 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 <string>
- #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<dbus::ExportedObject> 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<LivenessServiceProvider> weak_ptr_factory_{this};
- };
- } // namespace ash
- #endif // ASH_DBUS_LIVENESS_SERVICE_PROVIDER_H_
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