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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 CONTENT_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_H_
#define CONTENT_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_H_
#include <stdint.h>
#include <string>
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "content/common/background_sync_service.mojom.h"
#include "content/public/child/worker_thread.h"
#include "third_party/WebKit/public/platform/modules/background_sync/WebSyncProvider.h"
namespace base {
class SingleThreadTaskRunner;
}
namespace content {
// The BackgroundSyncProvider is called by the SyncManager and SyncRegistration
// objects and communicates with the BackgroundSyncManager object in the browser
// process. Each thread will have its own instance (e.g. main thread, worker
// threads), instantiated as needed by BlinkPlatformImpl. Each instance of
// the provider creates a new mojo connection to a new
// BackgroundSyncManagerImpl, which then talks to the BackgroundSyncManager
// object.
class BackgroundSyncProvider : public blink::WebSyncProvider,
public WorkerThread::Observer {
public:
// Constructor made public to allow BlinkPlatformImpl to own a copy for the
// main thread. Everyone else should use GetOrCreateThreadSpecificInstance().
explicit BackgroundSyncProvider(
const scoped_refptr<base::SingleThreadTaskRunner> main_task_runner);
~BackgroundSyncProvider() override;
// Returns thread-specific instance (if exists). Otherwise, a new instance
// will be created for the thread, except when called for a worker thread that
// has already been stopped.
static BackgroundSyncProvider* GetOrCreateThreadSpecificInstance(
base::SingleThreadTaskRunner* main_thread_task_runner);
// blink::WebSyncProvider implementation
void registerBackgroundSync(
const blink::WebSyncRegistration* options,
blink::WebServiceWorkerRegistration* service_worker_registration,
bool requested_from_service_worker,
blink::WebSyncRegistrationCallbacks* callbacks) override;
void getRegistrations(
blink::WebServiceWorkerRegistration* service_worker_registration,
blink::WebSyncGetRegistrationsCallbacks* callbacks) override;
// WorkerThread::Observer implementation.
void WillStopCurrentWorkerThread() override;
private:
// Callback handlers
void RegisterCallback(
scoped_ptr<blink::WebSyncRegistrationCallbacks> callbacks,
mojom::BackgroundSyncError error,
const mojom::SyncRegistrationPtr& options);
void GetRegistrationsCallback(
scoped_ptr<blink::WebSyncGetRegistrationsCallbacks> callbacks,
mojom::BackgroundSyncError error,
const mojo::Array<mojom::SyncRegistrationPtr>& registrations);
// Helper method that returns an initialized BackgroundSyncServicePtr.
mojom::BackgroundSyncServicePtr& GetBackgroundSyncServicePtr();
mojom::BackgroundSyncServicePtr background_sync_service_;
scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
DISALLOW_COPY_AND_ASSIGN(BackgroundSyncProvider);
};
} // namespace content
#endif // CONTENT_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_H_
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