1 // Copyright 2015 The Chromium OS 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 #include <brillo/dbus/dbus_service_watcher.h> 6 7 #include <base/bind.h> 8 9 namespace brillo { 10 namespace dbus_utils { 11 12 DBusServiceWatcher::DBusServiceWatcher( 13 scoped_refptr<dbus::Bus> bus, 14 const std::string& connection_name, 15 const base::Closure& on_connection_vanish) 16 : bus_{bus}, 17 connection_name_{connection_name}, 18 on_connection_vanish_{on_connection_vanish} { 19 monitoring_callback_ = base::Bind( 20 &DBusServiceWatcher::OnServiceOwnerChange, weak_factory_.GetWeakPtr()); 21 // Register to listen, and then request the current owner; 22 bus_->ListenForServiceOwnerChange(connection_name_, monitoring_callback_); 23 bus_->GetServiceOwner(connection_name_, monitoring_callback_); 24 } 25 26 DBusServiceWatcher::~DBusServiceWatcher() { 27 bus_->UnlistenForServiceOwnerChange( 28 connection_name_, monitoring_callback_); 29 } 30 31 void DBusServiceWatcher::OnServiceOwnerChange( 32 const std::string& service_owner) { 33 if (service_owner.empty()) { 34 on_connection_vanish_.Run(); 35 } 36 } 37 38 } // namespace dbus_utils 39 } // namespace brillo 40
