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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 CHROMEOS_DBUS_SERVICES_LIVENESS_SERVICE_PROVIDER_H_
#define CHROMEOS_DBUS_SERVICES_LIVENESS_SERVICE_PROVIDER_H_
#include <string>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/dbus/services/cros_dbus_service.h"
#include "dbus/exported_object.h"
namespace dbus {
class MethodCall;
}
namespace chromeos {
// 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.LibCrosService
// /org/chromium/LibCrosService
// org.chromium.LibCrosServiceInterface.CheckLiveness
//
// -> method return sender=:1.9 -> dest=:1.27 reply_serial=2
//
// (An empty response should be returned.)
class CHROMEOS_EXPORT LivenessServiceProvider
: public CrosDBusService::ServiceProviderInterface {
public:
LivenessServiceProvider();
~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_;
DISALLOW_COPY_AND_ASSIGN(LivenessServiceProvider);
};
} // namespace chromeos
#endif // CHROMEOS_DBUS_SERVICES_LIVENESS_SERVICE_PROVIDER_H_