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// Copyright 2016 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 CONTENT_BROWSER_PAYMENTS_PAYMENT_APP_CONTEXT_IMPL_H_
#define CONTENT_BROWSER_PAYMENTS_PAYMENT_APP_CONTEXT_IMPL_H_
#include <map>
#include <memory>
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/synchronization/atomic_flag.h"
#include "content/browser/payments/payment_app_database.h"
#include "content/common/content_export.h"
#include "content/public/browser/browser_thread.h"
#include "third_party/WebKit/public/platform/modules/payments/payment_app.mojom.h"
namespace content {
class PaymentAppDatabase;
class PaymentManager;
class ServiceWorkerContextWrapper;
// One instance of this exists per StoragePartition, and services multiple child
// processes/origins. Most logic is delegated to the owned PaymentAppDatabase
// instance, which is only accessed on the IO thread.
//
// This class is created/destructed by StoragePartitionImpl on UI thread.
// However, the PaymentAppDatabase that this class has internally should work on
// IO thread. So, this class has Init() and Shutdown() methods in addition to
// constructor and destructor. They should be called explicitly when creating
// and destroying StoragePartitionImpl.
//
// Expected order of lifetime calls:
// 1) Constructor
// 2) Init()
// 3) Can now call other public methods in this class in any order.
// - Can call CreatePaymentManager() on UI thread.
// - Can call GetAllPaymentApps() on UI thread.
// - Can call PaymentManagerHadConnectionError() on IO thread.
// - Can call payment_app_database() on IO thread.
// 4) Shutdown()
// 5) Destructor
class CONTENT_EXPORT PaymentAppContextImpl
: public base::RefCountedThreadSafe<
PaymentAppContextImpl,
content::BrowserThread::DeleteOnUIThread> {
public:
PaymentAppContextImpl();
// Init and Shutdown are for use on the UI thread when the
// StoragePartition is being setup and torn down.
void Init(scoped_refptr<ServiceWorkerContextWrapper> service_worker_context);
// Shutdown must be called before deleting this. Call on the UI thread.
void Shutdown();
// Create a PaymentManager that is owned by this. Call on the UI
// thread.
void CreatePaymentManager(payments::mojom::PaymentManagerRequest request);
// Called by PaymentManager objects so that they can
// be deleted. Call on the IO thread.
void PaymentManagerHadConnectionError(PaymentManager* service);
// Should be accessed only on the IO thread.
PaymentAppDatabase* payment_app_database() const;
private:
friend class PaymentAppContentUnitTestBase;
friend struct content::BrowserThread::DeleteOnThread<
content::BrowserThread::UI>;
friend class base::DeleteHelper<PaymentAppContextImpl>;
~PaymentAppContextImpl();
void CreatePaymentAppDatabaseOnIO(
scoped_refptr<ServiceWorkerContextWrapper> service_worker_context);
void CreatePaymentManagerOnIO(
mojo::InterfaceRequest<payments::mojom::PaymentManager> request);
void ShutdownOnIO();
// Only accessed on the IO thread.
std::unique_ptr<PaymentAppDatabase> payment_app_database_;
// The PaymentManagers are owned by this. They're either deleted during
// ShutdownOnIO or when the channel is closed via
// PaymentManagerHadConnectionError. Only accessed on the IO thread.
std::map<PaymentManager*, std::unique_ptr<PaymentManager>> payment_managers_;
#if DCHECK_IS_ON()
// Set after ShutdownOnIO() has run on the IO thread. |this| shouldn't be
// deleted before this is set.
base::AtomicFlag did_shutdown_on_io_;
#endif
DISALLOW_COPY_AND_ASSIGN(PaymentAppContextImpl);
};
} // namespace content
#endif // CONTENT_BROWSER_PAYMENTS_PAYMENT_APP_CONTEXT_IMPL_H_
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