Index: content/browser/service_worker/service_worker_disk_cache_migrator.h |
diff --git a/content/browser/service_worker/service_worker_disk_cache_migrator.h b/content/browser/service_worker/service_worker_disk_cache_migrator.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..f1503c85383f5fd821b3a50e254b14425cd9eab9 |
--- /dev/null |
+++ b/content/browser/service_worker/service_worker_disk_cache_migrator.h |
@@ -0,0 +1,58 @@ |
+// 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. |
+ |
+#include "content/browser/service_worker/service_worker_disk_cache.h" |
+ |
+#include "base/id_map.h" |
+#include "base/memory/scoped_ptr.h" |
+#include "content/browser/service_worker/service_worker_database.h" |
+#include "content/common/service_worker/service_worker_status_code.h" |
+ |
+namespace content { |
+ |
+// This is used for migrating the ServiceWorkerDiskCache from the BlockFile |
+// backend to the Simple backend. The migrator iterates over resources in the |
+// src DiskCache and copies them into the dest DiskCache one by one. This does |
+// not delete the resources in the src DiskCache. |
+// |
+// TODO(nhiroki): Remove this migrator after several milestones pass |
+// (http://crbug.com/487482) |
+class CONTENT_EXPORT ServiceWorkerDiskCacheMigrator { |
+ public: |
+ using StatusCallback = base::Callback<void(ServiceWorkerStatusCode)>; |
+ |
+ ServiceWorkerDiskCacheMigrator(ServiceWorkerDiskCache* src, |
+ ServiceWorkerDiskCache* dest); |
+ ~ServiceWorkerDiskCacheMigrator(); |
+ |
+ // Returns SERVICE_WORKER_OK if all resources are successfully migrated. The |
+ // caller should delete the src DiskCache after migration. |
+ void Start(const StatusCallback& callback); |
+ |
+ private: |
+ class Task; |
+ |
+ using InflightTaskMap = IDMap<Task, IDMapOwnPointer>; |
+ |
+ void ContinueMigratingResources(); |
+ void OnOpenNextEntry(disk_cache::Entry** entry, int result); |
+ void OnResourceMigrated(InflightTaskMap::KeyType task_id, |
+ ServiceWorkerStatusCode status); |
+ void Complete(ServiceWorkerStatusCode status); |
+ |
+ scoped_ptr<disk_cache::Backend::Iterator> iterator_; |
+ ServiceWorkerDiskCache* src_; |
+ ServiceWorkerDiskCache* dest_; |
+ |
+ InflightTaskMap::KeyType next_task_id_ = 0; |
+ InflightTaskMap inflight_tasks_; |
+ |
+ StatusCallback callback_; |
+ |
+ base::WeakPtrFactory<ServiceWorkerDiskCacheMigrator> weak_factory_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(ServiceWorkerDiskCacheMigrator); |
+}; |
+ |
+} // namespace content |