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// Copyright 2015 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 "components/update_client/action.h"
#include <algorithm>
#include <memory>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/location.h"
#include "base/memory/ref_counted.h"
#include "base/single_thread_task_runner.h"
#include "base/threading/thread_task_runner_handle.h"
#include "components/update_client/action_update.h"
#include "components/update_client/action_wait.h"
#include "components/update_client/configurator.h"
#include "components/update_client/update_client_errors.h"
#include "components/update_client/update_engine.h"
#include "components/update_client/utils.h"
namespace update_client {
using Events = UpdateClient::Observer::Events;
namespace {
// Returns true if a differential update is available, it has not failed yet,
// and the configuration allows this update.
bool CanTryDiffUpdate(const CrxUpdateItem* update_item,
const scoped_refptr<Configurator>& config) {
return HasDiffUpdate(update_item) && !update_item->diff_update_failed &&
config->EnabledDeltas();
}
} // namespace
ActionImpl::ActionImpl() : update_context_(nullptr) {
}
ActionImpl::~ActionImpl() {
DCHECK(thread_checker_.CalledOnValidThread());
}
void ActionImpl::Run(UpdateContext* update_context, Callback callback) {
DCHECK(thread_checker_.CalledOnValidThread());
update_context_ = update_context;
callback_ = callback;
}
CrxUpdateItem* ActionImpl::FindUpdateItemById(const std::string& id) const {
DCHECK(thread_checker_.CalledOnValidThread());
const auto it = update_context_->update_items.find(id);
return it != update_context_->update_items.end() ? it->second.get() : nullptr;
}
void ActionImpl::ChangeItemState(CrxUpdateItem* item, CrxUpdateItem::State to) {
DCHECK(thread_checker_.CalledOnValidThread());
item->state = to;
using Events = UpdateClient::Observer::Events;
const std::string& id(item->id);
switch (to) {
case CrxUpdateItem::State::kChecking:
NotifyObservers(Events::COMPONENT_CHECKING_FOR_UPDATES, id);
break;
case CrxUpdateItem::State::kCanUpdate:
NotifyObservers(Events::COMPONENT_UPDATE_FOUND, id);
break;
case CrxUpdateItem::State::kUpdatingDiff:
case CrxUpdateItem::State::kUpdating:
NotifyObservers(Events::COMPONENT_UPDATE_READY, id);
break;
case CrxUpdateItem::State::kUpdated:
NotifyObservers(Events::COMPONENT_UPDATED, id);
break;
case CrxUpdateItem::State::kUpToDate:
case CrxUpdateItem::State::kNoUpdate:
NotifyObservers(Events::COMPONENT_NOT_UPDATED, id);
break;
case CrxUpdateItem::State::kNew:
case CrxUpdateItem::State::kDownloading:
case CrxUpdateItem::State::kDownloadingDiff:
case CrxUpdateItem::State::kDownloaded:
case CrxUpdateItem::State::kUninstalled:
case CrxUpdateItem::State::kLastStatus:
// No notification for these states.
break;
}
}
size_t ActionImpl::ChangeAllItemsState(CrxUpdateItem::State from,
CrxUpdateItem::State to) {
DCHECK(thread_checker_.CalledOnValidThread());
size_t count = 0;
for (const auto& item : update_context_->update_items) {
if (item.second->state == from) {
ChangeItemState(item.second.get(), to);
++count;
}
}
return count;
}
void ActionImpl::NotifyObservers(UpdateClient::Observer::Events event,
const std::string& id) {
DCHECK(thread_checker_.CalledOnValidThread());
update_context_->notify_observers_callback.Run(event, id);
}
void ActionImpl::UpdateCrx() {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(!update_context_->queue.empty());
const std::string& id = update_context_->queue.front();
CrxUpdateItem* item = FindUpdateItemById(id);
DCHECK(item);
item->update_begin = base::TimeTicks::Now();
if (item->component.supports_group_policy_enable_component_updates &&
!update_context_->enabled_component_updates) {
item->error_category = static_cast<int>(ErrorCategory::kServiceError);
item->error_code = static_cast<int>(ServiceError::UPDATE_DISABLED);
item->extra_code1 = 0;
ChangeItemState(item, CrxUpdateItem::State::kNoUpdate);
UpdateCrxComplete(item);
return;
}
std::unique_ptr<Action> update_action(
CanTryDiffUpdate(item, update_context_->config)
? ActionUpdateDiff::Create()
: ActionUpdateFull::Create());
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::Bind(&Action::Run, base::Unretained(update_action.get()),
update_context_, callback_));
update_context_->current_action = std::move(update_action);
}
void ActionImpl::UpdateCrxComplete(CrxUpdateItem* item) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(item);
update_context_->ping_manager->SendPing(item);
update_context_->queue.pop();
if (update_context_->queue.empty()) {
UpdateComplete(Error::NONE);
} else {
DCHECK(!item->update_begin.is_null());
// Assume that the cost of applying the update is proportional with how
// long it took to apply it. Then delay the next update by the same time
// interval or the value provided by the configurator, whichever is less.
const base::TimeDelta max_update_delay =
base::TimeDelta::FromSeconds(update_context_->config->UpdateDelay());
const base::TimeDelta update_cost(base::TimeTicks::Now() -
item->update_begin);
DCHECK(update_cost >= base::TimeDelta());
std::unique_ptr<ActionWait> action_wait(
new ActionWait(std::min(update_cost, max_update_delay)));
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::Bind(&Action::Run, base::Unretained(action_wait.get()),
update_context_, callback_));
update_context_->current_action = std::move(action_wait);
}
}
void ActionImpl::UpdateComplete(Error error) {
DCHECK(thread_checker_.CalledOnValidThread());
base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
base::Bind(callback_, error));
}
} // namespace update_client
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