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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.
#ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DATABASE_TASK_MANAGER_H_
#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DATABASE_TASK_MANAGER_H_
#include <memory>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/threading/sequenced_worker_pool.h"
#include "content/common/content_export.h"
namespace base {
class SequencedTaskRunner;
}
namespace content {
// Used to sequence ServiceWorkerDatabase tasks. Vends two task runners: one
// that blocks shutdown and one that doesn't. The task runners use the same
// sequence token, so no matter which runner you post to, the tasks run in the
// order they are posted. This lets you post sequenced tasks with mixed shutdown
// behaviors.
class ServiceWorkerDatabaseTaskManager {
public:
virtual ~ServiceWorkerDatabaseTaskManager() {}
virtual std::unique_ptr<ServiceWorkerDatabaseTaskManager> Clone() = 0;
virtual base::SequencedTaskRunner* GetTaskRunner() = 0;
virtual base::SequencedTaskRunner* GetShutdownBlockingTaskRunner() = 0;
};
class ServiceWorkerDatabaseTaskManagerImpl
: public ServiceWorkerDatabaseTaskManager {
public:
explicit ServiceWorkerDatabaseTaskManagerImpl(
base::SequencedWorkerPool* pool);
~ServiceWorkerDatabaseTaskManagerImpl() override;
protected:
std::unique_ptr<ServiceWorkerDatabaseTaskManager> Clone() override;
base::SequencedTaskRunner* GetTaskRunner() override;
base::SequencedTaskRunner* GetShutdownBlockingTaskRunner() override;
private:
ServiceWorkerDatabaseTaskManagerImpl(
const scoped_refptr<base::SequencedTaskRunner>& task_runner,
const scoped_refptr<base::SequencedTaskRunner>&
shutdown_blocking_task_runner);
scoped_refptr<base::SequencedTaskRunner> task_runner_;
scoped_refptr<base::SequencedTaskRunner> shutdown_blocking_task_runner_;
DISALLOW_COPY_AND_ASSIGN(ServiceWorkerDatabaseTaskManagerImpl);
};
// Dummy implementation for testing. It vends whatever you give it in the ctor.
class CONTENT_EXPORT MockServiceWorkerDatabaseTaskManager
: public NON_EXPORTED_BASE(ServiceWorkerDatabaseTaskManager) {
public:
explicit MockServiceWorkerDatabaseTaskManager(
const scoped_refptr<base::SequencedTaskRunner>& task_runner);
~MockServiceWorkerDatabaseTaskManager() override;
protected:
std::unique_ptr<ServiceWorkerDatabaseTaskManager> Clone() override;
base::SequencedTaskRunner* GetTaskRunner() override;
base::SequencedTaskRunner* GetShutdownBlockingTaskRunner() override;
private:
scoped_refptr<base::SequencedTaskRunner> task_runner_;
DISALLOW_COPY_AND_ASSIGN(MockServiceWorkerDatabaseTaskManager);
};
} // namespace content
#endif // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DATABASE_TASK_MANAGER_H_
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