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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_DOWNLOAD_INTERNAL_BACKGROUND_SERVICE_BLOB_TASK_PROXY_H_
#define COMPONENTS_DOWNLOAD_INTERNAL_BACKGROUND_SERVICE_BLOB_TASK_PROXY_H_
#include <memory>
#include <string>
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/task/single_thread_task_runner.h"
#include "storage/browser/blob/blob_storage_constants.h"
namespace storage {
class BlobDataHandle;
class BlobStorageContext;
} // namespace storage
namespace download {
// Proxy for blob related task on IO thread.
// Created on main thread and do work on IO thread, destroyed on IO thread.
class BlobTaskProxy {
public:
using BlobContextGetter =
base::RepeatingCallback<base::WeakPtr<storage::BlobStorageContext>()>;
using BlobDataHandleCallback =
base::OnceCallback<void(std::unique_ptr<storage::BlobDataHandle>,
storage::BlobStatus status)>;
static std::unique_ptr<BlobTaskProxy> Create(
BlobContextGetter blob_context_getter,
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner);
BlobTaskProxy(BlobContextGetter blob_context_getter,
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner);
BlobTaskProxy(const BlobTaskProxy&) = delete;
BlobTaskProxy& operator=(const BlobTaskProxy&) = delete;
~BlobTaskProxy();
// Save blob data on UI thread. |callback| will be called on main thread after
// blob construction completes.
void SaveAsBlob(std::unique_ptr<std::string> data,
BlobDataHandleCallback callback);
private:
void InitializeOnIO(BlobContextGetter blob_context_getter);
void SaveAsBlobOnIO(std::unique_ptr<std::string> data,
BlobDataHandleCallback callback);
void BlobSavedOnIO(BlobDataHandleCallback callback,
storage::BlobStatus status);
scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
// Used to build blob data, must accessed on |io_task_runner_|.
base::WeakPtr<storage::BlobStorageContext> blob_storage_context_;
// Used to access blob storage context.
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
// BlobDataHandle that will be eventually passed to main thread.
std::unique_ptr<storage::BlobDataHandle> blob_data_handle_;
// Bounded to IO thread task runner.
base::WeakPtrFactory<BlobTaskProxy> weak_ptr_factory_{this};
};
} // namespace download
#endif // COMPONENTS_DOWNLOAD_INTERNAL_BACKGROUND_SERVICE_BLOB_TASK_PROXY_H_
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