/// <summary>
/// Closes the archive file once the statistics are no longer needed.
/// </summary>
public void Close()
{
if ((object)m_archiveReader == null)
return;
m_archiveReader.Dispose();
m_archiveReader = null;
m_metadataRecords = null;
}
/// <summary>
/// Causes the <see cref="StatisticsReader"/> to open the archive file and retrieve the statistics.
/// </summary>
public void Open()
{
m_archiveReader = new ArchiveReader();
m_archiveReader.Open(ArchiveFilePath);
m_metadataRecords = m_archiveReader.MetadataFile.Read()
.Where(record => !string.IsNullOrEmpty(record.Name))
.ToList();
}
/// <summary>
/// Attempts to disconnect from this <see cref="LocalInputAdapter"/>.
/// </summary>
protected override void AttemptDisconnection()
{
if ((object)m_readTimer != null)
{
m_readTimer.Enabled = false;
lock (m_readTimer)
m_dataReader = null;
}
if ((object)m_archiveReader != null)
{
m_archiveReader.HistoricFileListBuildStart -= m_archiveReader_HistoricFileListBuildStart;
m_archiveReader.HistoricFileListBuildComplete -= m_archiveReader_HistoricFileListBuildComplete;
m_archiveReader.HistoricFileListBuildException -= m_archiveReader_HistoricFileListBuildException;
m_archiveReader.DataReadException -= m_archiveReader_DataReadException;
m_archiveReader.Dispose();
}
m_archiveReader = null;
}
/// <summary>
/// Attempts to connect to this <see cref="LocalInputAdapter"/>.
/// </summary>
protected override void AttemptConnection()
{
// This adapter is only engaged for history, so we don't process any data unless a temporal constraint is defined
if (this.TemporalConstraintIsDefined())
{
// Turn off read timer if it's active
m_readTimer.Enabled = false;
// Attempt to open historian files
if (Directory.Exists(m_archiveLocation))
{
// Specified directory is a valid one.
string[] matches = Directory.GetFiles(m_archiveLocation, "*_archive*.d");
if (matches.Length > 0)
{
// Capture the instance name
string fileName = matches[0].Remove(matches[0].IndexOf("_archive", StringComparison.OrdinalIgnoreCase)) + "_archive.d";
// Setup historian reader
m_archiveReader = new ArchiveReader();
m_archiveReader.HistoricFileListBuildStart += m_archiveReader_HistoricFileListBuildStart;
m_archiveReader.HistoricFileListBuildComplete += m_archiveReader_HistoricFileListBuildComplete;
m_archiveReader.HistoricFileListBuildException += m_archiveReader_HistoricFileListBuildException;
m_archiveReader.DataReadException += m_archiveReader_DataReadException;
// Open the active archive
m_archiveReader.Open(fileName, m_archiveLocation);
try
{
// Start the data reader on its own thread so connection attempt can complete in a timely fashion...
ThreadPool.QueueUserWorkItem(StartDataReader);
}
catch (Exception ex)
{
// Process exception for logging
OnProcessException(MessageLevel.Warning, new InvalidOperationException("Failed to start data reader due to exception: " + ex.Message, ex));
}
}
}
else
{
OnProcessException(MessageLevel.Warning, new InvalidOperationException("Cannot open historian files, directory does not exist: " + m_archiveLocation));
}
}
}
/// <summary>
/// Releases the unmanaged resources used by the <see cref="LocalInputAdapter"/> 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 override void Dispose(bool disposing)
{
if (!m_disposed)
{
try
{
if (disposing)
{
if ((object)m_readTimer != null)
{
m_readTimer.Elapsed -= m_readTimer_Elapsed;
m_readTimer.Dispose();
m_readTimer = null;
}
if ((object)m_archiveReader != null)
{
m_archiveReader.HistoricFileListBuildStart -= m_archiveReader_HistoricFileListBuildStart;
m_archiveReader.HistoricFileListBuildComplete -= m_archiveReader_HistoricFileListBuildComplete;
m_archiveReader.HistoricFileListBuildException -= m_archiveReader_HistoricFileListBuildException;
m_archiveReader.DataReadException -= m_archiveReader_DataReadException;
m_archiveReader.Dispose();
m_archiveReader.Dispose();
m_archiveReader = null;
}
}
}
finally
{
m_disposed = true; // Prevent duplicate dispose.
base.Dispose(disposing); // Call base class Dispose().
}
}
}
public Main()
{
InitializeComponent();
// Initialize UI.
EnableWatermark();
StartTimeInput.Value = DateTime.UtcNow.AddMinutes(-5);
EndTimeInput.Value = DateTime.UtcNow;
// Add version number to title
this.Text = string.Format(this.Text, AssemblyInfo.EntryAssembly.Version.ToString(3));
foreach (string port in SerialPort.GetPortNames())
{
SerialPortInput.Items.Add(port);
}
if (SerialPortInput.Items.Count > 0)
{
SerialPortInput.SelectedIndex = 0;
SerialBaudRateInput.SelectedIndex = 4;
SerialParityInput.SelectedIndex = 0;
SerialStopBitsInput.SelectedIndex = 1;
}
else
{
// No serial ports where found on this machine so the option for serial output will be removed
OutputChannelTabs.TabPages.Remove(SerialSettingsTab);
}
Application.DoEvents();
// Initialize member variables.
m_activeThreads = new List<Thread>();
m_archiveReader = new ArchiveReader();
m_archiveReader.RolloverStart += m_archiveReader_RolloverStart;
m_archiveReader.RolloverComplete += m_archiveReader_RolloverComplete;
m_archiveReader.HistoricFileListBuildStart += m_archiveReader_HistoricFileListBuildStart;
m_archiveReader.HistoricFileListBuildComplete += m_archiveReader_HistoricFileListBuildComplete;
m_archiveReader.HistoricFileListBuildException += m_archiveReader_HistoricFileListBuildException;
m_archiveReader.DataReadException += m_archiveReader_DataReadException;
m_lastSelectedArchiveLocation = ConfigurationFile.Current.Settings.General["ArchiveLocation", true].ValueAs("");
// If last selected archive is not defined, try to a few default selections
if (string.IsNullOrWhiteSpace(m_lastSelectedArchiveLocation) || !Directory.Exists(m_lastSelectedArchiveLocation))
{
// See if a local archive folder exists with a valid archive
m_lastSelectedArchiveLocation = FilePath.GetAbsolutePath("Archive");
if (!Directory.Exists(m_lastSelectedArchiveLocation) || Directory.GetFiles(m_lastSelectedArchiveLocation, "*_archive.d").Length == 0)
{
// See if a local statistics folder exists with a valid archive
m_lastSelectedArchiveLocation = FilePath.GetAbsolutePath("Statistics");
// If neither of these folders exist, just leave setting blank
if (!Directory.Exists(m_lastSelectedArchiveLocation) || Directory.GetFiles(m_lastSelectedArchiveLocation, "*_archive.d").Length == 0)
m_lastSelectedArchiveLocation = "";
}
}
// Update archive location text box to contain the archive location from the configuration file.
ArchiveLocationInput.Text = m_lastSelectedArchiveLocation;
}