1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_HISTORY_ARCHIVED_DATABASE_H_ 6 #define CHROME_BROWSER_HISTORY_ARCHIVED_DATABASE_H_ 7 #pragma once 8 9 #include "app/sql/connection.h" 10 #include "app/sql/init_status.h" 11 #include "app/sql/meta_table.h" 12 #include "base/basictypes.h" 13 #include "chrome/browser/history/url_database.h" 14 #include "chrome/browser/history/visit_database.h" 15 16 class FilePath; 17 18 namespace history { 19 20 // Encapsulates the database operations for archived history. 21 // 22 // IMPORTANT NOTE: The IDs in this system for URLs and visits will be 23 // different than those in the main database. This is to eliminate the 24 // dependency between them so we can deal with each one on its own. 25 class ArchivedDatabase : public URLDatabase, 26 public VisitDatabase { 27 public: 28 // Must call Init() before using other members. 29 ArchivedDatabase(); 30 virtual ~ArchivedDatabase(); 31 32 // Initializes the database connection. This must return true before any other 33 // functions on this class are called. 34 bool Init(const FilePath& file_name); 35 36 // Transactions on the database. We support nested transactions and only 37 // commit when the outermost one is committed (sqlite doesn't support true 38 // nested transactions). 39 void BeginTransaction(); 40 void CommitTransaction(); 41 42 private: 43 // Implemented for the specialized databases. 44 virtual sql::Connection& GetDB(); 45 46 // Makes sure the version is up-to-date, updating if necessary. If the 47 // database is too old to migrate, the user will be notified. In this case, or 48 // for other errors, false will be returned. True means it is up-to-date and 49 // ready for use. 50 // 51 // This assumes it is called from the init function inside a transaction. It 52 // may commit the transaction and start a new one if migration requires it. 53 sql::InitStatus EnsureCurrentVersion(); 54 55 // The database. 56 sql::Connection db_; 57 sql::MetaTable meta_table_; 58 59 DISALLOW_COPY_AND_ASSIGN(ArchivedDatabase); 60 }; 61 62 } // namespace history 63 64 #endif // CHROME_BROWSER_HISTORY_ARCHIVED_DATABASE_H_ 65