content/browser/indexed_db/indexed_db_factory.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_H_
#define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_FACTORY_H_

#include <map>
#include <set>

#include "base/basictypes.h"
#include "base/files/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/strings/string16.h"
#include "content/browser/indexed_db/indexed_db_callbacks.h"
#include "content/browser/indexed_db/indexed_db_database.h"
#include "content/browser/indexed_db/indexed_db_database_callbacks.h"
#include "content/common/content_export.h"

namespace content {

class IndexedDBBackingStore;

class CONTENT_EXPORT IndexedDBFactory
    : NON_EXPORTED_BASE(public base::RefCounted<IndexedDBFactory>) {
 public:
  IndexedDBFactory();

  // Notifications from weak pointers.
  void ReleaseDatabase(const IndexedDBDatabase::Identifier& identifier,
                       bool forcedClose);

  void GetDatabaseNames(scoped_refptr<IndexedDBCallbacks> callbacks,
                        const std::string& origin_identifier,
                        const base::FilePath& data_directory);
  void Open(const string16& name,
            int64 version,
            int64 transaction_id,
            scoped_refptr<IndexedDBCallbacks> callbacks,
            scoped_refptr<IndexedDBDatabaseCallbacks> database_callbacks,
            const std::string& origin_identifier,
            const base::FilePath& data_directory);

  void DeleteDatabase(const string16& name,
                      scoped_refptr<IndexedDBCallbacks> callbacks,
                      const std::string& origin_identifier,
                      const base::FilePath& data_directory);

  // Iterates over all databases; for diagnostics only.
  std::vector<IndexedDBDatabase*> GetOpenDatabasesForOrigin(
      const std::string& origin_identifier) const;

 protected:
  friend class base::RefCounted<IndexedDBFactory>;

  virtual ~IndexedDBFactory();

  virtual scoped_refptr<IndexedDBBackingStore> OpenBackingStore(
      const std::string& origin_identifier,
      const base::FilePath& data_directory,
      WebKit::WebIDBCallbacks::DataLoss* data_loss,
      bool* disk_full);

  void ReleaseBackingStore(const std::string& identifier, bool immediate);
  void CloseBackingStore(const std::string& identifier);

 private:
  // Called internally after a database is closed, with some delay. If this
  // factory has the last reference, it will be released.
  void MaybeCloseBackingStore(const std::string& identifier);
  bool HasLastBackingStoreReference(const std::string& identifier) const;

  typedef std::map<IndexedDBDatabase::Identifier,
                   scoped_refptr<IndexedDBDatabase> > IndexedDBDatabaseMap;
  IndexedDBDatabaseMap database_map_;

  typedef std::map<std::string, scoped_refptr<IndexedDBBackingStore> >
      IndexedDBBackingStoreMap;
  IndexedDBBackingStoreMap backing_store_map_;

  std::set<scoped_refptr<IndexedDBBackingStore> > session_only_backing_stores_;
};

}  // namespace content

#endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_FACTORY_H_