chromeos: Implement the new D-Bus client for update engine.

chrome/browser/chromeos/dbus/update_engine_client.cc

+// Copyright (c) 2011 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.
+
+#include "chrome/browser/chromeos/dbus/update_engine_client.h"
+
+#include "base/bind.h"
+#include "base/callback.h"
+#include "base/string_util.h"
+#include "chrome/browser/chromeos/system/runtime_environment.h"
+#include "dbus/bus.h"
+#include "dbus/message.h"
+#include "dbus/object_proxy.h"
+#include "third_party/cros_system_api/dbus/service_constants.h"
+
+namespace chromeos {
+namespace {
+
+// Returns UPDATE_STATUS_ERROR on error.
+UpdateEngineClient::UpdateStatusOperation UpdateStatusFromString(
+    const std::string& str) {
+  if (str == "UPDATE_STATUS_IDLE")
+    return UpdateEngineClient::UPDATE_STATUS_IDLE;
+  if (str == "UPDATE_STATUS_CHECKING_FOR_UPDATE")
+    return UpdateEngineClient::UPDATE_STATUS_CHECKING_FOR_UPDATE;
+  if (str == "UPDATE_STATUS_UPDATE_AVAILABLE")
+    return UpdateEngineClient::UPDATE_STATUS_UPDATE_AVAILABLE;
+  if (str == "UPDATE_STATUS_DOWNLOADING")
+    return UpdateEngineClient::UPDATE_STATUS_DOWNLOADING;
+  if (str == "UPDATE_STATUS_VERIFYING")
+    return UpdateEngineClient::UPDATE_STATUS_VERIFYING;
+  if (str == "UPDATE_STATUS_FINALIZING")
+    return UpdateEngineClient::UPDATE_STATUS_FINALIZING;
+  if (str == "UPDATE_STATUS_UPDATED_NEED_REBOOT")
+    return UpdateEngineClient::UPDATE_STATUS_UPDATED_NEED_REBOOT;
+  if (str == "UPDATE_STATUS_REPORTING_ERROR_EVENT")
+    return UpdateEngineClient::UPDATE_STATUS_REPORTING_ERROR_EVENT;
+  return UpdateEngineClient::UPDATE_STATUS_ERROR;
+}
+
+// Used in UpdateEngineClient::EmptyUpdateCheckCallback().
+void EmptyUpdateCheckCallbackBody(
+    UpdateEngineClient::UpdateCheckResult unused_result) {
+}
+
+}  // namespace
+
+// The UpdateEngineClient implementation used in production.
+class UpdateEngineClientImpl : public UpdateEngineClient {
+ public:
+  explicit UpdateEngineClientImpl(dbus::Bus* bus)
+      : update_engine_proxy_(NULL),
+        weak_ptr_factory_(this),
+        last_status_() {
+    update_engine_proxy_ = bus->GetObjectProxy(
+        update_engine::kUpdateEngineServiceName,
+        update_engine::kUpdateEngineServicePath);
+
+    // Monitor the D-Bus signal for brightness changes. Only the power
+    // manager knows the actual brightness level. We don't cache the
+    // brightness level in Chrome as it will make things less reliable.
+    update_engine_proxy_->ConnectToSignal(
+        update_engine::kUpdateEngineInterface,
+        update_engine::kStatusUpdate,
+        base::Bind(&UpdateEngineClientImpl::StatusUpdateReceived,
+                   weak_ptr_factory_.GetWeakPtr()),
+        base::Bind(&UpdateEngineClientImpl::StatusUpdateConnected,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+
+  virtual ~UpdateEngineClientImpl() {
+  }
+
+  // UpdateEngineClient override.
+  virtual void AddObserver(Observer* observer) OVERRIDE {
+    observers_.AddObserver(observer);
+  }
+
+  // UpdateEngineClient override.
+  virtual void RemoveObserver(Observer* observer) OVERRIDE {
+    observers_.RemoveObserver(observer);
+  }
+
+  // UpdateEngineClient override.
+  virtual bool HasObserver(Observer* observer) OVERRIDE {
+    return observers_.HasObserver(observer);
+  }
+
+  // UpdateEngineClient override.
+  virtual void RequestUpdateCheck(UpdateCheckCallback callback) OVERRIDE {
+    dbus::MethodCall method_call(
+        update_engine::kUpdateEngineInterface,
+        update_engine::kAttemptUpdate);
+    dbus::MessageWriter writer(&method_call);
+    writer.AppendString("");  // Unused.
+    writer.AppendString("");  // Unused.
+
+    VLOG(1) << "Requesting an update check";
+    update_engine_proxy_->CallMethod(
+        &method_call,
+        dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
+        base::Bind(&UpdateEngineClientImpl::OnRequestUpdateCheck,
+                   weak_ptr_factory_.GetWeakPtr(),
+                   callback));
+  }
+
+  // UpdateEngineClient override.
+  virtual void RebootAfterUpdate() OVERRIDE {
+    dbus::MethodCall method_call(
+        update_engine::kUpdateEngineInterface,
+        update_engine::kRebootIfNeeded);
+
+    VLOG(1) << "Requesting a reboot";
+    update_engine_proxy_->CallMethod(
+        &method_call,
+        dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
+        base::Bind(&UpdateEngineClientImpl::OnRebootAfterUpdate,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+
+  // UpdateEngineClient override.
+  virtual void SetReleaseTrack(const std::string& track) OVERRIDE {
+    dbus::MethodCall method_call(
+        update_engine::kUpdateEngineInterface,
+        update_engine::kSetTrack);
+    dbus::MessageWriter writer(&method_call);
+    writer.AppendString(track);
+
+    VLOG(1) << "Requesting to set the release track to " << track;
+    update_engine_proxy_->CallMethod(
+        &method_call,
+        dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
+        base::Bind(&UpdateEngineClientImpl::OnSetReleaseTrack,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+
+  // UpdateEngineClient override.
+  virtual void GetReleaseTrack(GetReleaseTrackCallback callback) OVERRIDE {
+    dbus::MethodCall method_call(
+        update_engine::kUpdateEngineInterface,
+        update_engine::kGetTrack);
+
+    VLOG(1) << "Requesting to get the current release track";
+    update_engine_proxy_->CallMethod(
+        &method_call,
+        dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
+        base::Bind(&UpdateEngineClientImpl::OnGetReleaseTrack,
+                   weak_ptr_factory_.GetWeakPtr(),
+                   callback));
+  }
+
+  // UpdateEngineClient override.
+  virtual Status GetLastStatus() OVERRIDE {
+    return last_status_;
+  }
+
+ private:
+  // Called when a response for RequestUpdateCheck() is received.
+  void OnRequestUpdateCheck(UpdateCheckCallback callback,
+                            dbus::Response* response) {
+    if (!response) {
+      LOG(ERROR) << "Failed to request update check";
+      callback.Run(UPDATE_RESULT_FAILED);
+      return;
+    }
+    callback.Run(UPDATE_RESULT_SUCCESS);
+  }
+
+  // Called when a response for RebootAfterUpdate() is received.
+  void OnRebootAfterUpdate(dbus::Response* response) {
+    if (!response) {
+      LOG(ERROR) << "Failed to request rebooting after update";
+      return;
+    }
+  }
+
+  // Called when a response for SetReleaseTrack() is received.
+  void OnSetReleaseTrack(dbus::Response* response) {
+    if (!response) {
+      LOG(ERROR) << "Failed to request setting release track";
+      return;
+    }
+  }
+
+  // Called when a response for GetReleaseTrack() is received.
+  void OnGetReleaseTrack(GetReleaseTrackCallback callback,
+                         dbus::Response* response) {
+    if (!response) {
+      LOG(ERROR) << "Failed to request getting release track";
+      callback.Run("");
+      return;
+    }
+    dbus::MessageReader reader(response);
+    std::string release_track;
+    if (!reader.PopString(&release_track)) {
+      LOG(ERROR) << "Incorrect response: " << response->ToString();
+      callback.Run("");
+      return;
+    }
+    VLOG(1) << "The current release track received: " << release_track;
+    callback.Run(release_track);
+  }
+
+  // Called when a status update signal is received.
+  void StatusUpdateReceived(dbus::Signal* signal) {
+    VLOG(1) << "Status update signal received: " << signal->ToString();
+    dbus::MessageReader reader(signal);
+    int64 last_checked_time = 0;
+    double progress = 0.0;
+    std::string current_operation;
+    std::string new_version;
+    int64_t new_size = 0;
+    if (!(reader.PopInt64(&last_checked_time) &&
+          reader.PopDouble(&progress) &&
+          reader.PopString(&current_operation) &&
+          reader.PopString(&new_version) &&
+          reader.PopInt64(&new_size))) {
+      LOG(ERROR) << "Status changed signal had incorrect parameters: "
+                 << signal->ToString();
+      return;
+    }
+    Status status;
+    status.last_checked_time = last_checked_time;
+    status.download_progress = progress;
+    status.status = UpdateStatusFromString(current_operation);
+    status.new_version = new_version;
+    status.new_size = new_size;
+
+    last_status_ = status;
+    FOR_EACH_OBSERVER(Observer, observers_, UpdateStatusChanged(status));
+  }
+
+  // Called when the status update signal is initially connected.
+  void StatusUpdateConnected(const std::string& interface_name,
+                             const std::string& signal_name,
+                             bool success) {
+    LOG_IF(WARNING, !success)
+        << "Failed to connect to status updated signal.";
+  }
+
+  dbus::ObjectProxy* update_engine_proxy_;
+  ObserverList<Observer> observers_;
+  base::WeakPtrFactory<UpdateEngineClientImpl> weak_ptr_factory_;
+  Status last_status_;
+
+  DISALLOW_COPY_AND_ASSIGN(UpdateEngineClientImpl);
+};
+
+// The UpdateEngineClient implementation used on Linux desktop,
+// which does nothing.
+class UpdateEngineClientStubImpl : public UpdateEngineClient {
+  // UpdateEngineClient overrides.
+  virtual void AddObserver(Observer* observer) OVERRIDE {}
+  virtual void RemoveObserver(Observer* observer) OVERRIDE {}
+  virtual bool HasObserver(Observer* observer) OVERRIDE { return false; }
+
+  virtual void RequestUpdateCheck(UpdateCheckCallback callback) OVERRIDE {
+    callback.Run(UPDATE_RESULT_FAILED);
+  }
+  virtual void RebootAfterUpdate() OVERRIDE {}
+  virtual void SetReleaseTrack(const std::string& track) OVERRIDE {}
+  virtual void GetReleaseTrack(GetReleaseTrackCallback callback) OVERRIDE {
+    callback.Run("beta-channel");
+  }
+  virtual Status GetLastStatus() OVERRIDE { return Status(); }
+};
+
+UpdateEngineClient::UpdateEngineClient() {
+}
+
+UpdateEngineClient::~UpdateEngineClient() {
+}
+
+// static
+UpdateEngineClient::UpdateCheckCallback
+UpdateEngineClient::EmptyUpdateCheckCallback() {
+  return base::Bind(&EmptyUpdateCheckCallbackBody);
+}
+
+// static
+UpdateEngineClient* UpdateEngineClient::Create(dbus::Bus* bus) {
+  if (system::runtime_environment::IsRunningOnChromeOS()) {
+    return new UpdateEngineClientImpl(bus);
+  } else {
+    return new UpdateEngineClientStubImpl();
+  }
+}
+
+}  // namespace chromeos