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// Copyright 2014 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/update_client.h"
#include <algorithm>
#include <queue>
#include <set>
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/observer_list.h"
#include "base/sequenced_task_runner.h"
#include "base/single_thread_task_runner.h"
#include "base/thread_task_runner_handle.h"
#include "base/threading/sequenced_worker_pool.h"
#include "base/threading/thread_checker.h"
#include "components/update_client/configurator.h"
#include "components/update_client/crx_update_item.h"
#include "components/update_client/ping_manager.h"
#include "components/update_client/task_update.h"
#include "components/update_client/update_checker.h"
#include "components/update_client/update_client_internal.h"
#include "components/update_client/update_engine.h"
#include "components/update_client/update_response.h"
#include "components/update_client/utils.h"
#include "url/gurl.h"
namespace update_client {
CrxUpdateItem::CrxUpdateItem()
: state(State::kNew),
on_demand(false),
diff_update_failed(false),
error_category(0),
error_code(0),
extra_code1(0),
diff_error_category(0),
diff_error_code(0),
diff_extra_code1(0) {
}
CrxUpdateItem::~CrxUpdateItem() {
}
CrxComponent::CrxComponent() : allow_background_download(true) {
}
CrxComponent::~CrxComponent() {
}
// It is important that an instance of the UpdateClient binds an unretained
// pointer to itself. Otherwise, a life time circular dependency between this
// instance and its inner members prevents the destruction of this instance.
// Using unretained references is allowed in this case since the life time of
// the UpdateClient instance exceeds the life time of its inner members,
// including any thread objects that might execute callbacks bound to it.
UpdateClientImpl::UpdateClientImpl(
const scoped_refptr<Configurator>& config,
scoped_ptr<PingManager> ping_manager,
UpdateChecker::Factory update_checker_factory,
CrxDownloader::Factory crx_downloader_factory)
: config_(config),
ping_manager_(ping_manager.Pass()),
update_engine_(
new UpdateEngine(config,
update_checker_factory,
crx_downloader_factory,
ping_manager_.get(),
base::Bind(&UpdateClientImpl::NotifyObservers,
base::Unretained(this)))) {
}
UpdateClientImpl::~UpdateClientImpl() {
DCHECK(thread_checker_.CalledOnValidThread());
config_ = nullptr;
}
void UpdateClientImpl::Install(const std::string& id,
const CrxDataCallback& crx_data_callback,
const CompletionCallback& completion_callback) {
DCHECK(thread_checker_.CalledOnValidThread());
if (IsUpdating(id)) {
completion_callback.Run(Error::ERROR_UPDATE_IN_PROGRESS);
return;
}
std::vector<std::string> ids;
ids.push_back(id);
// Partially applies |completion_callback| to OnTaskComplete, so this
// argument is available when the task completes, along with the task itself.
const auto callback =
base::Bind(&UpdateClientImpl::OnTaskComplete, this, completion_callback);
scoped_ptr<TaskUpdate> task(new TaskUpdate(update_engine_.get(), true, ids,
crx_data_callback, callback));
// Install tasks are run concurrently and never queued up.
auto it = tasks_.insert(task.release()).first;
RunTask(*it);
}
void UpdateClientImpl::Update(const std::vector<std::string>& ids,
const CrxDataCallback& crx_data_callback,
const CompletionCallback& completion_callback) {
DCHECK(thread_checker_.CalledOnValidThread());
const auto callback =
base::Bind(&UpdateClientImpl::OnTaskComplete, this, completion_callback);
scoped_ptr<TaskUpdate> task(new TaskUpdate(update_engine_.get(), false, ids,
crx_data_callback, callback));
// If no other tasks are running at the moment, run this update task.
// Otherwise, queue the task up.
if (tasks_.empty()) {
auto it = tasks_.insert(task.release()).first;
RunTask(*it);
} else {
task_queue_.push(task.release());
}
}
void UpdateClientImpl::RunTask(Task* task) {
DCHECK(thread_checker_.CalledOnValidThread());
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::Bind(&Task::Run, base::Unretained(task)));
}
void UpdateClientImpl::OnTaskComplete(
const CompletionCallback& completion_callback,
Task* task,
int error) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(task);
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::Bind(completion_callback, error));
tasks_.erase(task);
delete task;
// Pick up a task from the queue if the queue has pending tasks and no other
// task is running.
if (tasks_.empty() && !task_queue_.empty()) {
RunTask(task_queue_.front());
task_queue_.pop();
}
}
void UpdateClientImpl::AddObserver(Observer* observer) {
DCHECK(thread_checker_.CalledOnValidThread());
observer_list_.AddObserver(observer);
}
void UpdateClientImpl::RemoveObserver(Observer* observer) {
DCHECK(thread_checker_.CalledOnValidThread());
observer_list_.RemoveObserver(observer);
}
void UpdateClientImpl::NotifyObservers(Observer::Events event,
const std::string& id) {
DCHECK(thread_checker_.CalledOnValidThread());
FOR_EACH_OBSERVER(Observer, observer_list_, OnEvent(event, id));
}
bool UpdateClientImpl::GetCrxUpdateState(const std::string& id,
CrxUpdateItem* update_item) const {
return update_engine_->GetUpdateState(id, update_item);
}
bool UpdateClientImpl::IsUpdating(const std::string& id) const {
DCHECK(thread_checker_.CalledOnValidThread());
for (const auto& task : tasks_) {
const auto ids(task->GetIds());
if (std::find(std::begin(ids), std::end(ids), id) != std::end(ids)) {
return true;
}
}
return false;
}
scoped_refptr<UpdateClient> UpdateClientFactory(
const scoped_refptr<Configurator>& config) {
scoped_ptr<PingManager> ping_manager(new PingManager(*config));
return new UpdateClientImpl(config, ping_manager.Pass(),
&UpdateChecker::Create, &CrxDownloader::Create);
}
} // namespace update_client
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