1 // Copyright (c) 2013 The Chromium 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 "chromeos/dbus/system_clock_client.h"
6
7 #include "base/bind.h"
8 #include "dbus/bus.h"
9 #include "dbus/message.h"
10 #include "dbus/object_path.h"
11 #include "dbus/object_proxy.h"
12 #include "third_party/cros_system_api/dbus/service_constants.h"
13
14 namespace chromeos {
15
16 // The SystemClockClient implementation used in production.
17 class SystemClockClientImpl : public SystemClockClient {
18 public:
SystemClockClientImpl()19 SystemClockClientImpl()
20 : system_clock_proxy_(NULL), weak_ptr_factory_(this) {}
21
~SystemClockClientImpl()22 virtual ~SystemClockClientImpl() {
23 }
24
AddObserver(Observer * observer)25 virtual void AddObserver(Observer* observer) OVERRIDE {
26 observers_.AddObserver(observer);
27 }
28
RemoveObserver(Observer * observer)29 virtual void RemoveObserver(Observer* observer) OVERRIDE {
30 observers_.RemoveObserver(observer);
31 }
32
HasObserver(Observer * observer)33 virtual bool HasObserver(Observer* observer) OVERRIDE {
34 return observers_.HasObserver(observer);
35 }
36
37 protected:
Init(dbus::Bus * bus)38 virtual void Init(dbus::Bus* bus) OVERRIDE {
39 system_clock_proxy_ = bus->GetObjectProxy(
40 system_clock::kSystemClockServiceName,
41 dbus::ObjectPath(system_clock::kSystemClockServicePath));
42
43 // Monitor the D-Bus signal for TimeUpdated changes.
44 system_clock_proxy_->ConnectToSignal(
45 system_clock::kSystemClockInterface,
46 system_clock::kSystemClockUpdated,
47 base::Bind(&SystemClockClientImpl::TimeUpdatedReceived,
48 weak_ptr_factory_.GetWeakPtr()),
49 base::Bind(&SystemClockClientImpl::TimeUpdatedConnected,
50 weak_ptr_factory_.GetWeakPtr()));
51 }
52
53 private:
54 // Called when a TimeUpdated signal is received.
TimeUpdatedReceived(dbus::Signal * signal)55 void TimeUpdatedReceived(dbus::Signal* signal) {
56 VLOG(1) << "TimeUpdated signal received: " << signal->ToString();
57 dbus::MessageReader reader(signal);
58 FOR_EACH_OBSERVER(Observer, observers_, SystemClockUpdated());
59 }
60
61 // Called when the TimeUpdated signal is initially connected.
TimeUpdatedConnected(const std::string & interface_name,const std::string & signal_name,bool success)62 void TimeUpdatedConnected(const std::string& interface_name,
63 const std::string& signal_name,
64 bool success) {
65 LOG_IF(ERROR, !success)
66 << "Failed to connect to TimeUpdated signal.";
67 }
68
69 dbus::ObjectProxy* system_clock_proxy_;
70 ObserverList<Observer> observers_;
71
72 // Note: This should remain the last member so it'll be destroyed and
73 // invalidate its weak pointers before any other members are destroyed.
74 base::WeakPtrFactory<SystemClockClientImpl> weak_ptr_factory_;
75
76 DISALLOW_COPY_AND_ASSIGN(SystemClockClientImpl);
77 };
78
SystemClockClient()79 SystemClockClient::SystemClockClient() {
80 }
81
~SystemClockClient()82 SystemClockClient::~SystemClockClient() {
83 }
84
85 // static
Create()86 SystemClockClient* SystemClockClient::Create() {
87 return new SystemClockClientImpl();
88 }
89
90 } // namespace chromeos
91