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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.
#ifndef COMPONENTS_UPDATE_CLIENT_UPDATE_CLIENT_INTERNAL_H_
#define COMPONENTS_UPDATE_CLIENT_UPDATE_CLIENT_INTERNAL_H_
#include <memory>
#include <queue>
#include <set>
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/observer_list.h"
#include "base/threading/thread_checker.h"
#include "components/update_client/crx_downloader.h"
#include "components/update_client/update_checker.h"
#include "components/update_client/update_client.h"
namespace update_client {
class Configurator;
class PingManager;
class Task;
class UpdateEngine;
enum class Error;
class UpdateClientImpl : public UpdateClient {
public:
UpdateClientImpl(const scoped_refptr<Configurator>& config,
std::unique_ptr<PingManager> ping_manager,
UpdateChecker::Factory update_checker_factory,
CrxDownloader::Factory crx_downloader_factory);
// Overrides for UpdateClient.
void AddObserver(Observer* observer) override;
void RemoveObserver(Observer* observer) override;
void Install(const std::string& id,
const CrxDataCallback& crx_data_callback,
const Callback& callback) override;
void Update(const std::vector<std::string>& ids,
const CrxDataCallback& crx_data_callback,
const Callback& callback) override;
bool GetCrxUpdateState(const std::string& id,
CrxUpdateItem* update_item) const override;
bool IsUpdating(const std::string& id) const override;
void Stop() override;
void SendUninstallPing(const std::string& id,
const base::Version& version,
int reason,
const Callback& callback) override;
private:
~UpdateClientImpl() override;
void RunTask(std::unique_ptr<Task> task);
void OnTaskComplete(const Callback& callback, Task* task, Error error);
void NotifyObservers(Observer::Events event, const std::string& id);
base::ThreadChecker thread_checker_;
// True if Stop method has been called.
bool is_stopped_ = false;
scoped_refptr<Configurator> config_;
// Contains the tasks that are pending. In the current implementation,
// only update tasks (background tasks) are queued up. These tasks are
// pending while they are in this queue. They have not been picked up yet
// by the update engine.
std::queue<Task*> task_queue_;
// Contains all tasks in progress. These are the tasks that the update engine
// is executing at one moment. Install tasks are run concurrently, update
// tasks are always serialized, and update tasks are queued up if install
// tasks are running. In addition, concurrent install tasks for the same id
// are not allowed.
std::set<Task*> tasks_;
// TODO(sorin): try to make the ping manager an observer of the service.
std::unique_ptr<PingManager> ping_manager_;
std::unique_ptr<UpdateEngine> update_engine_;
base::ObserverList<Observer> observer_list_;
DISALLOW_COPY_AND_ASSIGN(UpdateClientImpl);
};
} // namespace update_client
#endif // COMPONENTS_UPDATE_CLIENT_UPDATE_CLIENT_INTERNAL_H_