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// Copyright (c) 2014 The Chromium OS 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 SHILL_DBUS_NAME_WATCHER_H_
#define SHILL_DBUS_NAME_WATCHER_H_
#include <string>
#include <base/callback.h>
#include <base/macros.h>
#include <base/memory/weak_ptr.h>
namespace shill {
class DBusManager;
class DBusNameWatcher : public base::SupportsWeakPtr<DBusNameWatcher> {
public:
typedef base::Callback<void(const std::string& name,
const std::string& owner)> NameAppearedCallback;
typedef base::Callback<void(const std::string& name)> NameVanishedCallback;
// Constructs a watcher to monitor a given DBus service |name|. When the
// service appears, |name_appeared_callback| is invoked if non-null. When the
// service vanishes, |name_vanished_callback| is invoked if non-null. At
// construction, it registers to a DBus manager |dbus_manager| in order to
// receive notifications when |name| appears on or vanishes from DBus. At
// desctruction, it dereigisters from |dbus_manager|.
DBusNameWatcher(DBusManager* dbus_manager,
const std::string& name,
const NameAppearedCallback& name_appeared_callback,
const NameVanishedCallback& name_vanished_callback);
~DBusNameWatcher();
// Called by |dbus_manager_| when |name_| appears on or vanishes from DBus.
// |name_appeared_callback_| or |name_vanished_callback_| is invoked
// accordingly if non-null.
void OnNameOwnerChanged(const std::string& name) const;
const std::string& name() const { return name_; }
private:
base::WeakPtr<DBusManager> dbus_manager_;
std::string name_;
NameAppearedCallback name_appeared_callback_;
NameVanishedCallback name_vanished_callback_;
DISALLOW_COPY_AND_ASSIGN(DBusNameWatcher);
};
} // namespace shill
#endif // SHILL_DBUS_NAME_WATCHER_H_