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// Copyright 2016 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/upstart/upstart_client.h"
#include <utility>
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/logging.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chromeos/ash/components/dbus/upstart/fake_upstart_client.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_proxy.h"
namespace ash {
namespace {
constexpr char kUpstartServiceName[] = "com.ubuntu.Upstart";
constexpr char kUpstartJobInterface[] = "com.ubuntu.Upstart0_6.Job";
constexpr char kStartMethod[] = "Start";
constexpr char kRestartMethod[] = "Restart";
constexpr char kStopMethod[] = "Stop";
constexpr char kUpstartJobsPath[] = "/com/ubuntu/Upstart/jobs/";
constexpr char kMediaAnalyticsJob[] = "rtanalytics";
UpstartClient* g_instance = nullptr;
class UpstartClientImpl : public UpstartClient {
public:
explicit UpstartClientImpl(dbus::Bus* bus) : bus_(bus) {}
UpstartClientImpl(const UpstartClientImpl&) = delete;
UpstartClientImpl& operator=(const UpstartClientImpl&) = delete;
~UpstartClientImpl() override = default;
// UpstartClient overrides:
void StartJob(const std::string& job,
const std::vector<std::string>& upstart_env,
chromeos::VoidDBusMethodCallback callback) override {
CallJobMethod(job, kStartMethod, upstart_env,
base::BindOnce(&UpstartClientImpl::OnVoidMethod,
weak_ptr_factory_.GetWeakPtr(), job, "start",
std::move(callback)));
}
void StartJobWithTimeout(const std::string& job,
const std::vector<std::string>& upstart_env,
chromeos::VoidDBusMethodCallback callback,
int timeout_ms) override {
CallJobMethod(job, kStartMethod, upstart_env,
base::BindOnce(&UpstartClientImpl::OnVoidMethod,
weak_ptr_factory_.GetWeakPtr(), job, "start",
std::move(callback)),
timeout_ms);
}
void StartJobWithErrorDetails(
const std::string& job,
const std::vector<std::string>& upstart_env,
StartJobWithErrorDetailsCallback callback) override {
CallJobMethod(
job, kStartMethod, upstart_env,
base::BindOnce(&UpstartClientImpl::OnStartJobWithErrorDetails,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)));
}
void StopJob(const std::string& job,
const std::vector<std::string>& upstart_env,
chromeos::VoidDBusMethodCallback callback) override {
CallJobMethod(job, kStopMethod, upstart_env,
base::BindOnce(&UpstartClientImpl::OnVoidMethod,
weak_ptr_factory_.GetWeakPtr(), job, "stop",
std::move(callback)));
}
void StartMediaAnalytics(const std::vector<std::string>& upstart_env,
chromeos::VoidDBusMethodCallback callback) override {
StartJob(kMediaAnalyticsJob, upstart_env, std::move(callback));
}
void RestartMediaAnalytics(
chromeos::VoidDBusMethodCallback callback) override {
CallJobMethod(
kMediaAnalyticsJob, kRestartMethod, {},
base::BindOnce(&UpstartClientImpl::OnVoidMethod,
weak_ptr_factory_.GetWeakPtr(), kMediaAnalyticsJob,
"restart", std::move(callback)));
}
using UpstartClient::StopJob;
void StopMediaAnalytics() override {
StopJob(kMediaAnalyticsJob, {}, base::DoNothing());
}
void StopMediaAnalytics(chromeos::VoidDBusMethodCallback callback) override {
StopJob(kMediaAnalyticsJob, {}, std::move(callback));
}
private:
void CallJobMethod(const std::string& job,
const std::string& method,
const std::vector<std::string>& upstart_env,
dbus::ObjectProxy::ResponseOrErrorCallback callback,
int timeout_ms = dbus::ObjectProxy::TIMEOUT_USE_DEFAULT) {
dbus::ObjectProxy* job_proxy = bus_->GetObjectProxy(
kUpstartServiceName, dbus::ObjectPath(kUpstartJobsPath + job));
dbus::MethodCall method_call(kUpstartJobInterface, method);
dbus::MessageWriter writer(&method_call);
writer.AppendArrayOfStrings(upstart_env);
writer.AppendBool(true /* wait for response */);
job_proxy->CallMethodWithErrorResponse(&method_call, timeout_ms,
std::move(callback));
}
void OnVoidMethod(const std::string& job_for_logging,
const std::string& action_for_logging,
chromeos::VoidDBusMethodCallback callback,
dbus::Response* response,
dbus::ErrorResponse* error_response) {
if (!response)
LogError(job_for_logging, action_for_logging, error_response);
std::move(callback).Run(response);
}
void OnStartJobWithErrorDetails(StartJobWithErrorDetailsCallback callback,
dbus::Response* response,
dbus::ErrorResponse* error_response) {
std::optional<std::string> error_name;
std::optional<std::string> error_message;
if (!response && error_response) {
// Error response may contain the error message as string.
error_name = error_response->GetErrorName();
dbus::MessageReader reader(error_response);
std::string message;
if (reader.PopString(&message))
error_message = std::move(message);
}
std::move(callback).Run(response, std::move(error_name),
std::move(error_message));
}
void LogError(const std::string& job_for_logging,
const std::string& action_for_logging,
dbus::ErrorResponse* error_response) {
std::string error_name;
std::string error_message;
if (error_response) {
// Error response may contain the error message as string.
error_name = error_response->GetErrorName();
dbus::MessageReader reader(error_response);
reader.PopString(&error_message);
} else {
// Method call failed without returning an error response. D-Bus itself is
// not working for whatever reason.
error_name = "unknown error";
}
LOG(ERROR) << "Failed to " << action_for_logging << " " << job_for_logging
<< ": " << error_name << ": " << error_message;
}
raw_ptr<dbus::Bus> bus_ = 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<UpstartClientImpl> weak_ptr_factory_{this};
};
} // namespace
// static
const char UpstartClient::kAlreadyStartedError[] =
"com.ubuntu.Upstart0_6.Error.AlreadyStarted";
UpstartClient::UpstartClient() {
DCHECK(!g_instance);
g_instance = this;
}
UpstartClient::~UpstartClient() {
DCHECK_EQ(this, g_instance);
g_instance = nullptr;
}
// static
void UpstartClient::Initialize(dbus::Bus* bus) {
DCHECK(bus);
new UpstartClientImpl(bus);
}
// static
void UpstartClient::InitializeFake() {
// Do not create a new fake if it was initialized early in a browser test (to
// allow test properties to be set).
if (!FakeUpstartClient::Get())
new FakeUpstartClient();
}
// static
void UpstartClient::Shutdown() {
DCHECK(g_instance);
delete g_instance;
}
// static
UpstartClient* UpstartClient::Get() {
return g_instance;
}
} // namespace ash
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