Migrate the IndexedDB backend from Blink to Chromium

content/browser/indexed_db/indexed_db_factory_impl.h

+// Copyright (c) 2013 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_INDEXED_DB_INDEXED_DB_FACTORY_IMPL_H_
+#define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_FACTORY_IMPL_H_
+
+#include <map>
+#include <set>
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "content/browser/indexed_db/indexed_db_callbacks_wrapper.h"
+#include "content/browser/indexed_db/indexed_db_database_callbacks_wrapper.h"
+#include "content/browser/indexed_db/indexed_db_factory.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+class IndexedDBBackingStore;
+class IndexedDBDatabaseImpl;
+
+class CONTENT_EXPORT IndexedDBFactoryImpl
+    : NON_EXPORTED_BASE(public IndexedDBFactory) {
+ public:
+  static scoped_refptr<IndexedDBFactoryImpl> Create() {
+    return make_scoped_refptr(new IndexedDBFactoryImpl());
+  }
+
+  // Notifications from weak pointers.
+  virtual void RemoveIDBDatabaseBackend(const string16& unique_identifier);
+
+  virtual void GetDatabaseNames(
+      scoped_refptr<IndexedDBCallbacksWrapper> callbacks,
+      const string16& database_identifier,
+      const string16& data_dir) OVERRIDE;
+  virtual void Open(
+      const string16& name,
+      int64 version,
+      int64 transaction_id,
+      scoped_refptr<IndexedDBCallbacksWrapper> callbacks,
+      scoped_refptr<IndexedDBDatabaseCallbacksWrapper> database_callbacks,
+      const string16& database_identifier,
+      const string16& data_dir) OVERRIDE;
+
+  virtual void DeleteDatabase(
+      const string16& name,
+      scoped_refptr<IndexedDBCallbacksWrapper> callbacks,
+      const string16& database_identifier,
+      const string16& data_dir) OVERRIDE;
+
+ protected:
+  IndexedDBFactoryImpl();
+  virtual ~IndexedDBFactoryImpl();
+  virtual scoped_refptr<IndexedDBBackingStore> OpenBackingStore(
+      const string16& database_identifier,
+      const string16& data_dir);
+
+ private:
+  typedef std::map<string16, scoped_refptr<IndexedDBDatabaseImpl> >
+      IndexedDBDatabaseMap;
+  IndexedDBDatabaseMap database_backend_map_;
+
+  typedef std::map<string16, base::WeakPtr<IndexedDBBackingStore> >
+      IndexedDBBackingStoreMap;
+  IndexedDBBackingStoreMap backing_store_map_;
+
+  std::set<scoped_refptr<IndexedDBBackingStore> > session_only_backing_stores_;
+
+  // Only one instance of the factory should exist at any given time.
+  static IndexedDBFactoryImpl* idb_factory_backend_impl;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_FACTORY_IMPL_H_