private void UnpackResponse(PersistedDataReader dataReader) { while (dataReader.ReadDataHeader()) { lock (this) { if (this.DimensionSet == null) { this.DimensionSet = dataReader.DimensionSet; } var remoteData = dataReader.LoadData <TInternal>(); if (!remoteData.Validate()) { remoteData.Dispose(); throw new PersistedDataException("Remote data is invalid."); } if (this.data == null && this.DimensionSet.Equals(dataReader.DimensionSet)) { this.DimensionSet = dataReader.DimensionSet; this.data = remoteData; } else { if (this.data == null) { this.data = new KeyedDataStore <TInternal>(this.DimensionSet, this.memoryStreamManager); } this.data.TakeData(remoteData); remoteData.Dispose(); } } foreach (var responseSource in dataReader.Header.Sources) { // NOTE: We use 'StartsWith' below because lots of data is currently marked with // the non-FQDN machine name. We can change it to 'Equals' in the future. var localSource = this.Sources.FirstOrDefault(s => s.Name.StartsWith(responseSource.Name, StringComparison.OrdinalIgnoreCase)); if (localSource == null) { // XXX: here for testing because we have to query 'localhost' but won't ever get something good // back. Yes, this is STUPID. if (this.Sources.Count == 1 && this.Sources[0].Name == "localhost") { localSource = this.Sources[0]; } else { throw new PersistedDataException( string.Format("Source {0} returned by server is unknown", responseSource.Name)); } } localSource.Status = responseSource.Status; } } }
private void ReadFromStorage(string filename, bool sourcesOnly) { KeyedDataStore <TInternal> readData = null; try { Events.Write.BeginLoadingData(filename); using (var stream = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read)) { using (var reader = new PersistedDataReader(stream, this.memoryStreamManager, this.DimensionSet)) { // We'll only ever write one set of data, so we only try to read one. if (reader.ReadDataHeader()) { this.MergeSourceStatus(reader.Header.Sources); if (sourcesOnly) { return; } if (typeof(TInternal) != reader.DataType) { throw new InvalidDataException( string.Format( "this.start={0},this.end={1}, hdr.start={2}, hdr.end={3}, this.type={4}, hdr.type={5}", this.StartTicks, this.EndTicks, reader.StartTime.Ticks, reader.EndTime.Ticks, typeof(TInternal), reader.DataType)); } readData = reader.LoadData <TInternal>(); if (this.DimensionSet.Equals(reader.DimensionSet) && (this.data == null || this.data.Empty)) { this.DimensionSet = reader.DimensionSet; if (this.data != null) { this.data.Dispose(); } this.data = readData; readData = null; } else { if (this.data == null) { this.data = new KeyedDataStore <TInternal>(this.DimensionSet, this.memoryStreamManager, "read data"); } this.data.TakeData(readData); this.data.Merge(); } } } } } catch (FileNotFoundException) { Events.Write.SealedDataFileMissing(filename); } catch (PersistedDataException ex) { Events.Write.PersistedDataException(ex); Events.Write.DiscardingIncompleteData(filename); if (this.data != null) { this.data.Dispose(); } this.data = null; } catch (OutOfMemoryException) { // TODO: this code is here to deal with file corruption issues, once checksums have been added and // are fully available it must be removed. File.Delete(filename); throw; } finally { if (readData != null) { readData.Dispose(); } } // if data is still null, some error happened loading the file (empty, missing, corrupt). // Just start over with clean data. if (this.data == null) { if (File.Exists(this.Filename)) { File.Delete(this.Filename); } this.data = new KeyedDataStore <TInternal>(this.DimensionSet, this.memoryStreamManager, "placeholder for invalid data."); } Events.Write.EndLoadingData(filename); }