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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/dbus/chunneld/chunneld_client.h"
#include <memory>
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "chromeos/ash/components/dbus/chunneld/fake_chunneld_client.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "third_party/cros_system_api/dbus/chunneld/dbus-constants.h"
namespace ash {
namespace {
ChunneldClient* g_instance = nullptr;
class ChunneldClientImpl : public ChunneldClient {
public:
ChunneldClientImpl() = default;
~ChunneldClientImpl() override = default;
ChunneldClientImpl(const ChunneldClientImpl&) = delete;
ChunneldClientImpl& operator=(const ChunneldClientImpl&) = delete;
void AddObserver(Observer* observer) override {
observer_list_.AddObserver(observer);
}
void RemoveObserver(Observer* observer) override {
observer_list_.RemoveObserver(observer);
}
void WaitForServiceToBeAvailable(
dbus::ObjectProxy::WaitForServiceToBeAvailableCallback callback)
override {
chunneld_proxy_->WaitForServiceToBeAvailable(std::move(callback));
}
void Init(dbus::Bus* bus) override {
chunneld_proxy_ = bus->GetObjectProxy(
vm_tools::chunneld::kChunneldServiceName,
dbus::ObjectPath(vm_tools::chunneld::kChunneldServicePath));
chunneld_proxy_->SetNameOwnerChangedCallback(
base::BindRepeating(&ChunneldClientImpl::NameOwnerChangedReceived,
weak_ptr_factory_.GetWeakPtr()));
}
private:
template <typename ResponseProto>
void OnDBusProtoResponse(chromeos::DBusMethodCallback<ResponseProto> callback,
dbus::Response* dbus_response) {
if (!dbus_response) {
std::move(callback).Run(std::nullopt);
return;
}
ResponseProto reponse_proto;
dbus::MessageReader reader(dbus_response);
if (!reader.PopArrayOfBytesAsProto(&reponse_proto)) {
LOG(ERROR) << "Failed to parse proto from " << dbus_response->GetMember();
std::move(callback).Run(std::nullopt);
return;
}
std::move(callback).Run(std::move(reponse_proto));
}
void NameOwnerChangedReceived(const std::string& old_owner,
const std::string& new_owner) {
if (!old_owner.empty()) {
for (auto& observer : observer_list_) {
observer.ChunneldServiceStopped();
}
}
if (!new_owner.empty()) {
for (auto& observer : observer_list_) {
observer.ChunneldServiceStarted();
}
}
}
base::ObserverList<Observer> observer_list_;
raw_ptr<dbus::ObjectProxy> chunneld_proxy_ = nullptr;
// Note: This should remain the last member so it'll be destroyed and
// invalidate its weak pointers before any other members are destroyed.
base::WeakPtrFactory<ChunneldClientImpl> weak_ptr_factory_{this};
};
} // namespace
// static
ChunneldClient* ChunneldClient::Get() {
return g_instance;
}
// static
void ChunneldClient::Initialize(dbus::Bus* bus) {
CHECK(bus);
(new ChunneldClientImpl())->Init(bus);
}
// static
void ChunneldClient::InitializeFake() {
(new FakeChunneldClient())->Init(nullptr);
}
// static
void ChunneldClient::Shutdown() {
CHECK(g_instance);
delete g_instance;
}
ChunneldClient::ChunneldClient() {
CHECK(!g_instance);
g_instance = this;
}
ChunneldClient::~ChunneldClient() {
CHECK_EQ(g_instance, this);
g_instance = nullptr;
}
} // namespace ash
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