/// <summary> /// Initialize LiteEngine using initial engine settings /// </summary> public LiteEngine(EngineSettings settings) { _settings = settings ?? throw new ArgumentNullException(nameof(settings)); // clear checkpoint if database is readonly if (_settings.ReadOnly) { _settings.Checkpoint = 0; } LOG($"start initializing{(_settings.ReadOnly ? " (readonly)" : "")}", "ENGINE"); try { // initialize locker service (no dependency) _locker = new LockService(settings.Timeout, settings.ReadOnly); // initialize disk service (will create database if needed) _disk = new DiskService(settings); // read page with no cache ref (has a own PageBuffer) - do not Release() support var buffer = _disk.ReadFull(FileOrigin.Data).First(); // if first byte are 1 this datafile are encrypted but has do defined password to open if (buffer[0] == 1) { throw new LiteException(0, "This data file is encrypted and needs a password to open"); } _header = new HeaderPage(buffer); // initialize wal-index service _walIndex = new WalIndexService(_disk, _locker); // if exists log file, restore wal index references (can update full _header instance) if (_disk.GetLength(FileOrigin.Log) > 0) { _walIndex.RestoreIndex(ref _header); } // initialize sort temp disk _sortDisk = new SortDisk(settings.CreateTempFactory(), CONTAINER_SORT_SIZE, settings.UtcDate); // initialize transaction monitor as last service _monitor = new TransactionMonitor(_header, _locker, _disk, _walIndex, _settings); // register system collections this.InitializeSystemCollections(); LOG("initialization completed", "ENGINE"); } catch (Exception ex) { LOG(ex.Message, "ERROR"); // explicit dispose (but do not run shutdown operation) this.Dispose(true); throw; } }
/// <summary> /// Initialize LiteEngine using initial engine settings /// </summary> public LiteEngine(EngineSettings settings) { _settings = settings ?? throw new ArgumentNullException(nameof(settings)); LOG($"start initializing{(_settings.ReadOnly ? " (readonly)" : "")}", "ENGINE"); try { // initialize disk service (will create database if needed) _disk = new DiskService(settings, MEMORY_SEGMENT_SIZES); // get header page from disk service _header = _disk.Header; // test for same collation if (settings.Collation != null && settings.Collation.ToString() != _header.Pragmas.Collation.ToString()) { throw new LiteException(0, $"Datafile collation '{_header.Pragmas.Collation}' is different from engine settings. Use Rebuild database to change collation."); } // initialize locker service _locker = new LockService(_header.Pragmas); // initialize wal-index service _walIndex = new WalIndexService(_disk, _locker); // restore wal index references, if exists _walIndex.RestoreIndex(_header); // initialize sort temp disk _sortDisk = new SortDisk(settings.CreateTempFactory(), CONTAINER_SORT_SIZE, _header.Pragmas); // initialize transaction monitor as last service _monitor = new TransactionMonitor(_header, _settings, _locker, _disk, _walIndex); // register system collections this.InitializeSystemCollections(); LOG("initialization completed", "ENGINE"); } catch (Exception ex) { LOG(ex.Message, "ERROR"); // explicit dispose (but do not run shutdown operation) this.Dispose(true); throw; } }
/// <summary> /// Initialize database /// </summary> public async Task OpenAsync() { LOG("start initializing", "ENGINE"); try { // open async stream if (_stream is IAsyncInitialize s) { await s.InitializeAsync(); } // initialize disk service (will create database if needed) _disk = await DiskService.CreateAsync(_stream, _collation, MEMORY_SEGMENT_SIZES, MAX_EXTENDS); // get header page from disk service _header = _disk.Header; // test for same collation if (_collation.ToString() != _header.Pragmas.Collation.ToString()) { throw new LiteException(0, $"Datafile collation '{_header.Pragmas.Collation}' is different from engine settings. Use Rebuild database to change collation."); } // initialize wal-index service _walIndex = new WalIndexService(_disk); // restore wal index references, if exists await _walIndex.RestoreIndex(_header); // register system collections // this.InitializeSystemCollections(); _disposed = false; LOG("initialization completed", "ENGINE"); } catch (Exception ex) { LOG(ex.Message, "ERROR"); // explicit dispose (but do not run shutdown operation) await this.DisposeAsync(); throw; } }