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// Copyright (c) 2011 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 WEBKIT_SUPPORT_SIMPLE_DATABASE_SYSTEM_H_
#define WEBKIT_SUPPORT_SIMPLE_DATABASE_SYSTEM_H_
#include "base/file_path.h"
#include "base/hash_tables.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_temp_dir.h"
#include "base/platform_file.h"
#include "base/string16.h"
#include "base/synchronization/lock.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDatabaseObserver.h"
#include "webkit/database/database_connections.h"
#include "webkit/database/database_tracker.h"
class SimpleDatabaseSystem : public webkit_database::DatabaseTracker::Observer,
public WebKit::WebDatabaseObserver {
public:
static SimpleDatabaseSystem* GetInstance();
SimpleDatabaseSystem();
~SimpleDatabaseSystem();
// VFS functions
base::PlatformFile OpenFile(const string16& vfs_file_name, int desired_flags);
int DeleteFile(const string16& vfs_file_name, bool sync_dir);
long GetFileAttributes(const string16& vfs_file_name);
long long GetFileSize(const string16& vfs_file_name);
// database tracker functions
void DatabaseOpened(const string16& origin_identifier,
const string16& database_name,
const string16& description,
int64 estimated_size);
void DatabaseModified(const string16& origin_identifier,
const string16& database_name);
void DatabaseClosed(const string16& origin_identifier,
const string16& database_name);
// DatabaseTracker::Observer implementation
virtual void OnDatabaseSizeChanged(const string16& origin_identifier,
const string16& database_name,
int64 database_size,
int64 space_available);
virtual void OnDatabaseScheduledForDeletion(const string16& origin_identifier,
const string16& database_name);
// WebDatabaseObserver implementation
virtual void databaseOpened(const WebKit::WebDatabase& database);
virtual void databaseModified(const WebKit::WebDatabase& database);
virtual void databaseClosed(const WebKit::WebDatabase& database);
void ClearAllDatabases();
void SetDatabaseQuota(int64 quota);
private:
// The calls that come from the database tracker run on the main thread.
// Therefore, we can only call DatabaseUtil::GetFullFilePathForVfsFile()
// on the main thread. However, the VFS calls run on the DB thread and
// they need to crack VFS file paths. To resolve this problem, we store
// a map of vfs_file_names to file_paths. The map is updated on the main
// thread on each DatabaseOpened() call that comes from the database
// tracker, and is read on the DB thread by each VFS call.
void SetFullFilePathsForVfsFile(const string16& origin_identifier,
const string16& database_name);
FilePath GetFullFilePathForVfsFile(const string16& vfs_file_name);
static SimpleDatabaseSystem* instance_;
bool waiting_for_dbs_to_close_;
ScopedTempDir temp_dir_;
scoped_refptr<webkit_database::DatabaseTracker> db_tracker_;
base::Lock file_names_lock_;
base::hash_map<string16, FilePath> file_names_;
webkit_database::DatabaseConnections database_connections_;
};
#endif // WEBKIT_SUPPORT_SIMPLE_DATABASE_SYSTEM_H_
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