/// <summary>
/// Causes the <see cref="StatisticsReader"/> to open the archive file and retrieve the statistics.
/// </summary>
public void Open()
{
IEnumerable<MetadataRecord> records;
string signalReference;
int index;
if (m_archive != null)
throw new InvalidOperationException("The StatisticsReader must be closed before reopening.");
m_archive = OpenArchiveFile();
records = m_archive.MetadataFile.Read();
foreach (MetadataRecord record in records)
{
signalReference = record.Synonym1;
index = signalReference.LastIndexOf('!');
if (index >= 0)
{
switch (signalReference.Substring(index))
{
case "!IS-ST1":
m_totalFrames.Add(record, m_archive.ReadData(record.HistorianID, StartTime, EndTime));
break;
case "!IS-ST3":
m_missingFrames.Add(record, m_archive.ReadData(record.HistorianID, StartTime, EndTime));
break;
case "!IS-ST8":
m_connectedStats.Add(record, m_archive.ReadData(record.HistorianID, StartTime, EndTime));
break;
case "!IS-ST14":
m_averageLatency.Add(record, m_archive.ReadData(record.HistorianID, StartTime, EndTime));
break;
case "!IS-ST17":
m_actualDataRate.Add(record, m_archive.ReadData(record.HistorianID, StartTime, EndTime));
break;
case "!PMU-ST1":
m_dataQualityErrors.Add(record, m_archive.ReadData(record.HistorianID, StartTime, EndTime));
break;
case "!PMU-ST2":
m_timeQualityErrors.Add(record, m_archive.ReadData(record.HistorianID, StartTime, EndTime));
break;
}
}
}
}
/// <summary>
/// Closes the archive file once the statistics are no longer needed.
/// </summary>
public void Close()
{
if ((object)m_archive == null)
return;
m_totalFrames.Clear();
m_missingFrames.Clear();
m_connectedStats.Clear();
m_averageLatency.Clear();
m_actualDataRate.Clear();
m_dataQualityErrors.Clear();
m_timeQualityErrors.Clear();
m_archive.Close();
m_archive = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="ArchiveFileAllocationTable"/> class.
/// </summary>
/// <param name="parent">An <see cref="ArchiveFile"/> object.</param>
internal ArchiveFileAllocationTable(ArchiveFile parent)
{
m_parent = parent;
m_dataBlockPointers = new List<ArchiveDataBlockPointer>();
m_fixedTableRegion = new FixedTableRegion(this);
m_variableTableRegion = new VariableTableRegion(this);
if (m_parent.FileData.Length == 0)
{
// File is brand new.
m_fileStartTime = TimeTag.MinValue;
m_fileEndTime = TimeTag.MinValue;
m_dataBlockSize = m_parent.DataBlockSize;
m_dataBlockCount = ArchiveFile.MaximumDataBlocks(m_parent.FileSize, m_parent.DataBlockSize);
for (int i = 0; i < m_dataBlockCount; i++)
{
m_dataBlockPointers.Add(new ArchiveDataBlockPointer(m_parent, i));
}
}
else
{
// Existing file, read table regions:
// Seek to beginning of fixed table region
m_parent.FileData.Seek(-m_fixedTableRegion.BinaryLength, SeekOrigin.End);
// Parse fixed table region
m_fixedTableRegion.ParseBinaryImageFromStream(m_parent.FileData);
// Seek to beginning of variable table region (above fixed from bottom of file)
m_parent.FileData.Seek(-(m_fixedTableRegion.BinaryLength + m_variableTableRegion.BinaryLength), SeekOrigin.End);
// Parse variable table region
m_variableTableRegion.ParseBinaryImageFromStream(m_parent.FileData);
}
}
private void WriteToHistoricArchiveFile(IDataPoint[] items)
{
// Wait until the historic file list has been built.
if (m_buildHistoricFileListThread.IsAlive)
m_buildHistoricFileListThread.Join();
Dictionary<Info, Dictionary<int, List<IDataPoint>>> historicFileData = new Dictionary<Info, Dictionary<int, List<IDataPoint>>>();
// Separate all point data into bins by historic file and point ID
foreach (IDataPoint dataPoint in items) {
try
{
Info historicFileInfo;
Dictionary<int, List<IDataPoint>> sortedPointData;
List<IDataPoint> pointData;
lock (m_historicArchiveFiles)
{
// Attempt to find a historic archive file where the data point belongs
historicFileInfo = m_historicArchiveFiles.Find(info => FindHistoricArchiveFileForWrite(info, dataPoint.Time));
}
// If a historic file exists, sort the data point into the proper bin
if ((object)historicFileInfo != null)
{
sortedPointData = historicFileData.GetOrAdd(historicFileInfo, info => new Dictionary<int, List<IDataPoint>>());
pointData = sortedPointData.GetOrAdd(dataPoint.HistorianID, id => new List<IDataPoint>());
pointData.Add(dataPoint);
}
}
catch (Exception ex)
{
// Notify of the exception
OnDataWriteException(ex);
}
}
foreach (Info historicFileInfo in historicFileData.Keys)
{
Dictionary<int, List<IDataPoint>> sortedPointData = historicFileData[historicFileInfo];
int overflowBlocks = 0;
using (ArchiveFile historicFile = new ArchiveFile())
{
try
{
// Open the historic file
historicFile.FileName = historicFileInfo.FileName;
historicFile.StateFile = m_stateFile;
historicFile.IntercomFile = m_intercomFile;
historicFile.MetadataFile = m_metadataFile;
historicFile.Open();
}
catch (Exception ex)
{
// Notify of the exception
OnDataWriteException(ex);
// If we fail to open the historic file,
// then we cannot write any of these data
// points to it so we might as well move on
continue;
}
// Calculate the number of additional data blocks needed to store all the data
foreach (int pointID in sortedPointData.Keys)
{
try
{
ArchiveDataBlock lastDataBlock = historicFile.Fat.FindLastDataBlock(pointID);
int blockCapacity = historicFile.DataBlockSize * 1024 / ArchiveDataPoint.FixedLength;
int overflowPoints = sortedPointData[pointID].Count + (lastDataBlock?.SlotsUsed ?? 0) - (lastDataBlock?.Capacity ?? 0);
overflowBlocks += (overflowPoints + blockCapacity - 1) / blockCapacity;
}
catch (Exception ex)
{
// Notify of the exception
OnDataWriteException(ex);
}
}
try
{
// Extend the file by the needed amount
if (overflowBlocks > 0)
historicFile.Fat.Extend(overflowBlocks);
}
catch (Exception ex)
{
// Notify of the exception
OnDataWriteException(ex);
}
foreach (int pointID in sortedPointData.Keys)
{
try
{
ArchiveDataBlock historicFileBlock = null;
// Sort the point data for the current point ID by time
sortedPointData[pointID].Sort();
foreach (IDataPoint dataPoint in sortedPointData[pointID])
{
if ((object)historicFileBlock == null || historicFileBlock.SlotsAvailable == 0)
{
// Request a new or previously used data block for point data
historicFileBlock = historicFile.Fat.RequestDataBlock(pointID, dataPoint.Time, -1);
}
// Write the data point into the data block
historicFileBlock.Write(dataPoint);
historicFile.Fat.DataPointsReceived++;
historicFile.Fat.DataPointsArchived++;
}
}
catch (Exception ex)
{
// Notify of the exception
OnDataWriteException(ex);
}
}
try
{
// Save the file after all
// data has been written to it
historicFile.Save();
}
catch (Exception ex)
{
// Notify of the exception
OnDataWriteException(ex);
}
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ArchiveDataBlock"/> class.
/// </summary>
/// <param name="parent">An <see cref="ArchiveFile"/> object.</param>
/// <param name="index">0-based index of the <see cref="ArchiveDataBlock"/>.</param>
/// <param name="historianID">Historian identifier whose <see cref="ArchiveDataPoint"/> is stored in the <see cref="ArchiveDataBlock"/>.</param>
/// <param name="preRead">true to pre-read data to locate write cursor.</param>
internal ArchiveDataBlock(ArchiveFile parent, int index, int historianID, bool preRead = true)
{
m_parent = parent;
m_index = index;
m_historianID = historianID;
m_readBuffer = new byte[ArchiveDataPoint.FixedLength];
m_writeCursor = Location;
m_lastActivityTime = DateTime.UtcNow;
if (!preRead)
return;
// Scan through existing data to locate write cursor
// ReSharper disable once UnusedVariable
foreach (IDataPoint dataPoint in Read())
{
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ArchiveDataBlockPointer"/> class.
/// </summary>
/// <param name="parent">An <see cref="ArchiveFile"/> object.</param>
/// <param name="index">0-based index of the <see cref="ArchiveDataBlockPointer"/>.</param>
internal ArchiveDataBlockPointer(ArchiveFile parent, int index)
{
m_parent = parent;
m_index = index;
Reset();
}
private Info GetHistoricFileInfo(string fileName)
{
Info fileInfo = null;
try
{
// Validate the file name to determine whether the given file is actually a historic file
if (!Regex.IsMatch(fileName, string.Format(".+_.+_to_.+\\{0}$", FileExtension)))
return null;
if (File.Exists(fileName))
{
// We'll open the file and get relevant information about it.
ArchiveFile historicArchiveFile = new ArchiveFile();
historicArchiveFile.FileName = fileName;
historicArchiveFile.StateFile = m_stateFile;
historicArchiveFile.IntercomFile = m_intercomFile;
historicArchiveFile.MetadataFile = m_metadataFile;
historicArchiveFile.FileAccessMode = FileAccess.Read;
try
{
historicArchiveFile.Open();
fileInfo = new Info(fileName)
{
StartTimeTag = historicArchiveFile.Fat.FileStartTime,
EndTimeTag = historicArchiveFile.Fat.FileEndTime
};
}
catch (Exception ex)
{
OnHistoricFileListBuildException(new InvalidOperationException(string.Format("Failed to open historic data file \"{0}\" due to exception: {1}", FilePath.GetFileName(fileName), ex.Message), ex));
}
finally
{
historicArchiveFile.Dispose();
}
}
else
{
// We'll resolve to getting the file information from its name only if the file no longer exists
// at the location. This will be the case when file is moved to a different location. In this
// case the file information we provide is only as good as the file name.
string datesString = FilePath.GetFileNameWithoutExtension(fileName).Substring((FilePath.GetFileNameWithoutExtension(m_fileName) + "_").Length);
string[] fileStartEndDates = datesString.Split(new string[] { "_to_" }, StringSplitOptions.None);
fileInfo = new Info(fileName);
if (fileStartEndDates.Length == 2)
{
fileInfo.StartTimeTag = new TimeTag(Convert.ToDateTime(fileStartEndDates[0].Replace('!', ':')));
fileInfo.EndTimeTag = new TimeTag(Convert.ToDateTime(fileStartEndDates[1].Replace('!', ':')));
}
}
}
catch (Exception ex)
{
OnHistoricFileListBuildException(new InvalidOperationException(string.Format("Failed during information access attempt for historic data file \"{0}\" due to exception: {1}", FilePath.GetFileName(fileName), ex.Message), ex));
}
return fileInfo;
}
private static ArchiveFile OpenArchiveFile(string sourceFileName)
{
const string MetadataFileName = "{0}{1}_dbase.dat";
const string StateFileName = "{0}{1}_startup.dat";
const string IntercomFileName = "{0}scratch.dat";
string location = FilePath.GetDirectoryName(sourceFileName);
string fileName = FilePath.GetFileName(sourceFileName);
string instance = fileName.Substring(0, fileName.LastIndexOf("_archive", StringComparison.OrdinalIgnoreCase));
ArchiveFile file = new ArchiveFile
{
FileName = sourceFileName,
FileAccessMode = FileAccess.ReadWrite,
MonitorNewArchiveFiles = false,
PersistSettings = false,
LeadTimeTolerance = 10.0D * 365.0D * 24.0D * 60.0D,
CompressData = false,
ConserveMemory = false,
StateFile = new StateFile
{
FileAccessMode = FileAccess.ReadWrite,
FileName = string.Format(StateFileName, location, instance)
},
IntercomFile = new IntercomFile
{
FileAccessMode = FileAccess.ReadWrite,
FileName = string.Format(IntercomFileName, location)
},
MetadataFile = new MetadataFile
{
FileAccessMode = FileAccess.ReadWrite,
FileName = string.Format(MetadataFileName, location, instance),
LegacyMode = MetadataFileLegacyMode.Disabled,
LoadOnOpen = true
}
};
MetadataFile metadata = file.MetadataFile;
file.MetadataFile.Open();
if (file.MetadataFile.RecordsOnDisk == 0)
{
Console.WriteLine("Building Metadata file...");
for (int i = 1; i <= MetaDataPoints; i++)
{
metadata.Write(i, new MetadataRecord(i, MetadataFileLegacyMode.Disabled)
{
Name = "point" + i,
GeneralFlags = new MetadataRecordGeneralFlags
{
DataType = DataType.Analog,
Enabled = true
}
});
}
metadata.Save();
}
file.Open();
file.SynchronizeStateFile();
return file;
}
// Read data implementation
private IEnumerable<IDataPoint> ReadData(IEnumerable<int> historianIDs, TimeTag startTime, TimeTag endTime, IDataPoint resumeFrom, bool timeSorted)
{
// Yield to archive rollover process.
m_rolloverWaitHandle.WaitOne();
// Ensure that the current file is open.
if (!IsOpen)
throw new InvalidOperationException(string.Format("\"{0}\" file is not open", m_fileName));
// Ensure that the current file is active.
if (m_fileType != ArchiveFileType.Active)
throw new InvalidOperationException("Data can only be directly read from files that are Active");
// Ensure that the start and end time are valid.
if (startTime.CompareTo(endTime) > 0)
throw new ArgumentException("End Time precedes Start Time in the specified time span");
List<Info> dataFiles = new List<Info>();
bool pendingRollover = false;
bool usingActiveFile = false;
if (startTime.CompareTo(m_fat.FileStartTime) < 0)
{
// Data is to be read from historic file(s) - make sure that the list has been built
if (m_buildHistoricFileListThread.IsAlive)
m_buildHistoricFileListThread.Join();
lock (m_historicArchiveFiles)
{
dataFiles.AddRange(m_historicArchiveFiles.FindAll(info => FindHistoricArchiveFileForRead(info, startTime, endTime)));
}
}
if (endTime.CompareTo(m_fat.FileStartTime) >= 0)
{
// Data is to be read from the active file.
Info activeFileInfo = new Info(m_fileName)
{
StartTimeTag = m_fat.FileStartTime,
EndTimeTag = m_fat.FileEndTime
};
dataFiles.Add(activeFileInfo);
}
// Read data from all qualifying files.
foreach (Info dataFile in dataFiles)
{
ArchiveFile file = null;
try
{
if (string.Compare(dataFile.FileName, m_fileName, StringComparison.OrdinalIgnoreCase) == 0)
{
// Read data from current file.
usingActiveFile = true;
file = this;
// Atomically increment total number of readers for active file
Interlocked.Increment(ref m_activeFileReaders);
// Handle race conditions between rollover
// and incrementing the active readers
while (m_rolloverInProgress)
{
Interlocked.Decrement(ref m_activeFileReaders);
m_rolloverWaitHandle.WaitOne();
Interlocked.Increment(ref m_activeFileReaders);
}
}
else
{
// Read data from historic file.
usingActiveFile = false;
file = new ArchiveFile();
file.FileName = dataFile.FileName;
file.StateFile = m_stateFile;
file.IntercomFile = m_intercomFile;
file.MetadataFile = m_metadataFile;
file.FileAccessMode = FileAccess.Read;
file.Open();
}
// Create new data point scanner for the desired points in this file and given time range
IArchiveFileScanner scanner;
if (timeSorted)
scanner = new TimeSortedArchiveFileScanner();
else
scanner = new ArchiveFileScanner();
scanner.FileAllocationTable = file.Fat;
scanner.HistorianIDs = historianIDs;
scanner.StartTime = startTime;
scanner.EndTime = endTime;
scanner.ResumeFrom = resumeFrom;
scanner.DataReadExceptionHandler = (sender, e) => OnDataReadException(e.Argument);
// Reset resumeFrom to scan from beginning after picking up where left off from roll over
resumeFrom = null;
// Return data points
foreach (IDataPoint dataPoint in scanner.Read())
{
yield return dataPoint;
// If a rollover needs to happen, we need to relinquish read lock and close file
if (m_rolloverInProgress)
{
resumeFrom = dataPoint;
pendingRollover = true;
break;
}
}
}
finally
{
if (usingActiveFile)
{
// Atomically decrement active file reader count to signal in-process code that read is complete or yielded
Interlocked.Decrement(ref m_activeFileReaders);
}
else if ((object)file != null)
{
file.Dispose();
}
}
if (pendingRollover)
break;
}
if (pendingRollover)
{
// Recurse into this function with an updated start time and last read point ID so that read can
// resume right where it left off - recursed function call will wait until rollover is complete
foreach (IDataPoint dataPoint in ReadData(historianIDs, startTime, endTime, resumeFrom, timeSorted))
{
yield return dataPoint;
}
}
}
private void CloseArchiveFile()
{
if ((object)m_archiveFile != null)
{
m_archiveFile.DataReadException -= file_DataReadException;
m_archiveFile.HistoricFileListBuildComplete -= file_HistoricFileListBuildComplete;
m_archiveFile.HistoricFileListBuildException -= file_HistoricFileListBuildException;
m_archiveFile.HistoricFileListBuildStart -= file_HistoricFileListBuildStart;
m_archiveFile.HistoricFileListUpdated -= file_HistoricFileListUpdated;
m_archiveFile.RolloverComplete -= file_RolloverComplete;
m_archiveFile.RolloverStart -= file_RolloverStart;
m_archiveFile.Dispose();
}
m_archiveFile = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="LocalOutputAdapter"/> class.
/// </summary>
public LocalOutputAdapter()
{
m_autoRefreshMetadata = true;
m_archive = new ArchiveFile();
m_archive.MetadataFile = new MetadataFile();
m_archive.StateFile = new StateFile();
m_archive.IntercomFile = new IntercomFile();
MetadataRefreshOperation.IsBackground = false;
m_badDataMessageInterval = 900;
m_orphanCounts = new Dictionary<int, ulong>();
m_orphanQueue = ProcessQueue<IDataPoint>.CreateRealTimeQueue(HandleOrphanData);
m_badTimestampCounts = new Dictionary<int, ulong>();
m_badTimestampQueue = ProcessQueue<IDataPoint>.CreateRealTimeQueue(HandleBadTimestampData);
m_outOfSequenceCounts = new Dictionary<int, ulong>();
m_outOfSequenceQueue = ProcessQueue<IDataPoint>.CreateRealTimeQueue(HandleOutOfSequenceData);
}
// Opens an archive file as read-only and returns the ArchiveFile object.
private ArchiveFile OpenArchiveFile(string fileName, string offloadLocation)
{
const string metadataFileName = "{0}{1}_dbase.dat";
const string stateFileName = "{0}{1}_startup.dat";
const string intercomFileName = "{0}scratch.dat";
string archiveLocation = FilePath.GetDirectoryName(fileName);
string archiveName = FilePath.GetFileName(fileName);
string instance = archiveName.Substring(0, archiveName.LastIndexOf("_archive", StringComparison.OrdinalIgnoreCase));
ArchiveFile file = new ArchiveFile
{
FileName = fileName,
FileAccessMode = FileAccess.Read,
MonitorNewArchiveFiles = true,
PersistSettings = false,
ArchiveOffloadLocation = offloadLocation,
StateFile = new StateFile
{
FileAccessMode = FileAccess.Read,
FileName = string.Format(stateFileName, archiveLocation, instance)
},
IntercomFile = new IntercomFile
{
FileAccessMode = FileAccess.Read,
FileName = string.Format(intercomFileName, archiveLocation)
},
MetadataFile = new MetadataFile
{
FileAccessMode = FileAccess.Read,
FileName = string.Format(metadataFileName, archiveLocation, instance),
LoadOnOpen = true
}
};
file.DataReadException += file_DataReadException;
file.HistoricFileListBuildComplete += file_HistoricFileListBuildComplete;
file.HistoricFileListBuildException += file_HistoricFileListBuildException;
file.HistoricFileListBuildStart += file_HistoricFileListBuildStart;
file.HistoricFileListUpdated += file_HistoricFileListUpdated;
file.RolloverComplete += file_RolloverComplete;
file.RolloverStart += file_RolloverStart;
// Initialize the archive file (starts file watchers)
file.Initialize();
// Open the active archive file
file.Open();
// Start the roll-over watch timer
m_rolloverWatcher.Start();
return file;
}
/// <summary>
/// Opens the <see cref="ArchiveFile"/> for use.
/// </summary>
/// <param name="fileName">Archive .D archive file name.</param>
/// <param name="offloadLocation">Path to archive offload location.</param>
public void Open(string fileName, string offloadLocation = "")
{
CloseArchiveFile();
m_archiveFile = OpenArchiveFile(fileName, offloadLocation.ToNonNullString());
}
/// <summary>
/// Initializes a new instance of the <see cref="ArchiveDataBlockPointer"/> class.
/// </summary>
/// <param name="parent">An <see cref="ArchiveFile"/> object.</param>
/// <param name="index">0-based index of the <see cref="ArchiveDataBlockPointer"/>.</param>
/// <param name="buffer">Binary image to be used for initializing <see cref="ArchiveDataBlockPointer"/>.</param>
/// <param name="startIndex">0-based starting index of initialization data in the <paramref name="buffer"/>.</param>
/// <param name="length">Valid number of bytes in <paramref name="buffer"/> from <paramref name="startIndex"/>.</param>
internal ArchiveDataBlockPointer(ArchiveFile parent, int index, byte[] buffer, int startIndex, int length)
: this(parent, index)
{
ParseBinaryImage(buffer, startIndex, length);
}
/// <summary>
/// Releases the unmanaged resources used by the <see cref="StatisticsReader"/> object and optionally releases the managed resources.
/// </summary>
/// <param name="disposing">true to release both managed and unmanaged resources; false to release only unmanaged resources.</param>
protected virtual void Dispose(bool disposing)
{
if (!m_disposed)
{
try
{
// This will be done regardless of whether the object is finalized or disposed.
if (disposing)
{
m_archive?.Close();
m_archive = null;
}
}
finally
{
m_disposed = true; // Prevent duplicate dispose.
}
}
}
private void PrepareForRollover()
{
try
{
DriveInfo archiveDrive = new DriveInfo(Path.GetPathRoot(m_fileName).ToNonNullString());
// We'll start offloading historic files if we've reached the offload threshold.
if (m_archiveOffloadMaxAge > 0)
OffloadMaxAgedFiles();
if (archiveDrive.AvailableFreeSpace < archiveDrive.TotalSize * (1 - (m_archiveOffloadThreshold / 100)))
OffloadHistoricFiles();
// Maintain maximum number of historic files, if configured to do so
MaintainMaximumNumberOfHistoricFiles();
OnRolloverPreparationStart();
// Opening and closing a new archive file in "standby" mode will create a "standby" archive file.
ArchiveFile standbyArchiveFile = new ArchiveFile();
standbyArchiveFile.FileName = StandbyArchiveFileName;
standbyArchiveFile.FileSize = m_fileSize;
standbyArchiveFile.DataBlockSize = m_dataBlockSize;
standbyArchiveFile.StateFile = m_stateFile;
standbyArchiveFile.IntercomFile = m_intercomFile;
standbyArchiveFile.MetadataFile = m_metadataFile;
try
{
standbyArchiveFile.Open();
}
catch
{
string standbyFileName = standbyArchiveFile.FileName;
standbyArchiveFile.Close();
// We didn't succeed in creating a "standby" archive file, so we'll delete it if it was created
// partially (might happen if there isn't enough disk space or thread is aborted). This is to
// ensure that this preparation processes is kicked off again until a valid "standby" archive
// file is successfully created.
DeleteFile(standbyFileName);
throw; // Rethrow the exception so the appropriate action is taken.
}
finally
{
standbyArchiveFile.Dispose();
}
OnRolloverPreparationComplete();
}
catch (ThreadAbortException)
{
// This thread must die now...
}
catch (Exception ex)
{
OnRolloverPreparationException(ex);
}
}
// Opens the archive file in order to retrieve the statistics.
private ArchiveFile OpenArchiveFile()
{
ArchiveFile file = new ArchiveFile
{
FileName = ArchiveFilePath,
FileAccessMode = FileAccess.Read,
StateFile = new StateFile
{
FileAccessMode = FileAccess.Read,
FileName = StateFilePath
},
IntercomFile = new IntercomFile
{
FileAccessMode = FileAccess.Read,
FileName = IntercomFilePath
},
MetadataFile = new MetadataFile
{
FileAccessMode = FileAccess.Read,
FileName = MetadataFilePath,
LoadOnOpen = true
}
};
file.Open();
return file;
}
private void WriteToHistoricArchiveFile(IDataPoint[] items)
{
// Wait until the historic file list has been built.
if (m_buildHistoricFileListThread.IsAlive)
m_buildHistoricFileListThread.Join();
Dictionary<int, List<IDataPoint>> sortedPointData = new Dictionary<int, List<IDataPoint>>();
// First we'll separate all point data by ID.
for (int i = 0; i < items.Length; i++)
{
if (!sortedPointData.ContainsKey(items[i].HistorianID))
{
sortedPointData.Add(items[i].HistorianID, new List<IDataPoint>());
}
sortedPointData[items[i].HistorianID].Add(items[i]);
}
foreach (int pointID in sortedPointData.Keys)
{
// We'll sort the point data for the current point ID by time.
sortedPointData[pointID].Sort();
ArchiveFile historicFile = null;
ArchiveDataBlock historicFileBlock = null;
try
{
for (int i = 0; i < sortedPointData[pointID].Count; i++)
{
if ((object)historicFile == null)
{
// We'll try to find a historic file when the current point data belongs.
Info historicFileInfo;
lock (m_historicArchiveFiles)
{
historicFileInfo = m_historicArchiveFiles.Find(info => FindHistoricArchiveFileForWrite(info, sortedPointData[pointID][i].Time));
}
if ((object)historicFileInfo != null)
{
// Found a historic file where the data can be written.
historicFile = new ArchiveFile();
historicFile.FileName = historicFileInfo.FileName;
historicFile.StateFile = m_stateFile;
historicFile.IntercomFile = m_intercomFile;
historicFile.MetadataFile = m_metadataFile;
historicFile.Open();
}
}
if ((object)historicFile != null)
{
if (sortedPointData[pointID][i].Time.CompareTo(historicFile.Fat.FileStartTime) >= 0 && sortedPointData[pointID][i].Time.CompareTo(historicFile.Fat.FileEndTime) <= 0)
{
// The current point data belongs to the current historic archive file.
if ((object)historicFileBlock == null || historicFileBlock.SlotsAvailable == 0)
{
// Request a new or previously used data block for point data.
historicFileBlock = historicFile.Fat.RequestDataBlock(pointID, sortedPointData[pointID][i].Time, -1);
}
historicFileBlock.Write(sortedPointData[pointID][i]);
historicFile.Fat.DataPointsReceived++;
historicFile.Fat.DataPointsArchived++;
if (i == sortedPointData[pointID].Count() - 1)
{
// Last piece of data for the point, so we close the currently open file.
historicFile.Save();
historicFile.Dispose();
historicFile = null;
historicFileBlock = null;
}
}
else
{
// The current point data doesn't belong to the current historic archive file, so we have
// to write all the point data we have so far for the current historic archive file to it.
i--;
historicFile.Dispose();
historicFile = null;
historicFileBlock = null;
}
}
}
}
catch (Exception ex)
{
// Free-up used memory.
if ((object)historicFile != null)
{
try
{
historicFile.Dispose();
}
catch
{
}
}
// Notify of the exception.
OnDataWriteException(ex);
}
}
}
