private void ProcessServerResponse(byte[] buffer, int length)
{
// Currently this work is done on the async socket completion thread, make sure work to be done is timely and if the response processing
// is coming in via the command channel and needs to send a command back to the server, it should be done on a separate thread...
if (buffer != null && length > 0)
{
try
{
Dictionary<Guid, DeviceStatisticsHelper<SubscribedDevice>> subscribedDevicesLookup;
DeviceStatisticsHelper<SubscribedDevice> statisticsHelper;
ServerResponse responseCode = (ServerResponse)buffer[0];
ServerCommand commandCode = (ServerCommand)buffer[1];
int responseLength = BigEndian.ToInt32(buffer, 2);
int responseIndex = DataPublisher.ClientResponseHeaderSize;
bool solicited = false;
byte[][][] keyIVs;
// See if this was a solicited response to a requested server command
if (responseCode.IsSolicited())
{
lock (m_requests)
{
int index = m_requests.BinarySearch(commandCode);
if (index >= 0)
{
solicited = true;
m_requests.RemoveAt(index);
}
}
// Disconnect any established UDP data channel upon successful unsubscribe
if (solicited && commandCode == ServerCommand.Unsubscribe && responseCode == ServerResponse.Succeeded)
DataChannel = null;
}
OnReceivedServerResponse(responseCode, commandCode);
switch (responseCode)
{
case ServerResponse.Succeeded:
if (solicited)
{
switch (commandCode)
{
case ServerCommand.Authenticate:
OnStatusMessage("Success code received in response to server command \"{0}\": {1}", commandCode, InterpretResponseMessage(buffer, responseIndex, responseLength));
m_authenticated = true;
OnConnectionAuthenticated();
break;
case ServerCommand.Subscribe:
OnStatusMessage("Success code received in response to server command \"{0}\": {1}", commandCode, InterpretResponseMessage(buffer, responseIndex, responseLength));
m_subscribed = true;
break;
case ServerCommand.Unsubscribe:
OnStatusMessage("Success code received in response to server command \"{0}\": {1}", commandCode, InterpretResponseMessage(buffer, responseIndex, responseLength));
m_subscribed = false;
if ((object)m_dataStreamMonitor != null)
m_dataStreamMonitor.Enabled = false;
break;
case ServerCommand.RotateCipherKeys:
OnStatusMessage("Success code received in response to server command \"{0}\": {1}", commandCode, InterpretResponseMessage(buffer, responseIndex, responseLength));
break;
case ServerCommand.MetaDataRefresh:
OnStatusMessage("Success code received in response to server command \"{0}\": latest meta-data received.", commandCode);
OnMetaDataReceived(DeserializeMetadata(buffer.BlockCopy(responseIndex, responseLength)));
m_metadataRefreshPending = false;
break;
}
}
else
{
switch (commandCode)
{
case ServerCommand.MetaDataRefresh:
// Meta-data refresh may be unsolicited
OnStatusMessage("Received server confirmation for unsolicited request to \"{0}\" command: latest meta-data received.", commandCode);
OnMetaDataReceived(DeserializeMetadata(buffer.BlockCopy(responseIndex, responseLength)));
m_metadataRefreshPending = false;
break;
case ServerCommand.RotateCipherKeys:
// Key rotation may be unsolicited
OnStatusMessage("Received server confirmation for unsolicited request to \"{0}\" command: {1}", commandCode, InterpretResponseMessage(buffer, responseIndex, responseLength));
break;
case ServerCommand.Subscribe:
OnStatusMessage("Received unsolicited response to \"{0}\" command: {1}", commandCode, InterpretResponseMessage(buffer, responseIndex, responseLength));
break;
default:
OnProcessException(new InvalidOperationException("Publisher sent a success code for an unsolicited server command: " + commandCode));
break;
}
}
break;
case ServerResponse.Failed:
if (solicited)
OnStatusMessage("Failure code received in response to server command \"{0}\": {1}", commandCode, InterpretResponseMessage(buffer, responseIndex, responseLength));
else
OnProcessException(new InvalidOperationException("Publisher sent a failed code for an unsolicited server command: " + commandCode));
if (commandCode == ServerCommand.MetaDataRefresh)
m_metadataRefreshPending = false;
break;
case ServerResponse.DataPacket:
long now = DateTime.UtcNow.Ticks;
// Deserialize data packet
List<IMeasurement> measurements = new List<IMeasurement>();
DataPacketFlags flags;
Ticks timestamp = 0;
int count;
if (m_totalBytesReceived == 0)
{
// At the point when data is being received, data monitor should be enabled
if ((object)m_dataStreamMonitor != null && !m_dataStreamMonitor.Enabled)
m_dataStreamMonitor.Enabled = true;
// Establish run-time log for subscriber
if (m_autoConnect || m_dataGapRecoveryEnabled)
{
if ((object)m_runTimeLog == null)
{
m_runTimeLog = new RunTimeLog();
m_runTimeLog.FileName = GetLoggingPath(Name + "_RunTimeLog.txt");
m_runTimeLog.ProcessException += m_runTimeLog_ProcessException;
m_runTimeLog.Initialize();
}
else
{
// Mark the start of any data transmissions
m_runTimeLog.StartTime = DateTime.UtcNow;
m_runTimeLog.Enabled = true;
}
}
// The duration between last disconnection and start of data transmissions
// represents a gap in data - if data gap recovery is enabled, we log
// this as a gap for recovery:
if (m_dataGapRecoveryEnabled && (object)m_dataGapRecoverer != null)
m_dataGapRecoverer.LogDataGap(m_runTimeLog.StopTime, DateTime.UtcNow);
}
// Track total data packet bytes received from any channel
m_totalBytesReceived += m_lastBytesReceived;
m_monitoredBytesReceived += m_lastBytesReceived;
// Get data packet flags
flags = (DataPacketFlags)buffer[responseIndex];
responseIndex++;
bool synchronizedMeasurements = ((byte)(flags & DataPacketFlags.Synchronized) > 0);
bool compactMeasurementFormat = ((byte)(flags & DataPacketFlags.Compact) > 0);
bool compressedPayload = ((byte)(flags & DataPacketFlags.Compressed) > 0);
int cipherIndex = (flags & DataPacketFlags.CipherIndex) > 0 ? 1 : 0;
// Decrypt data packet payload if keys are available
if ((object)m_keyIVs != null)
{
// Get a local copy of volatile keyIVs reference since this can change at any time
keyIVs = m_keyIVs;
// Decrypt payload portion of data packet
buffer = Common.SymmetricAlgorithm.Decrypt(buffer, responseIndex, responseLength - 1, keyIVs[cipherIndex][0], keyIVs[cipherIndex][1]);
responseIndex = 0;
responseLength = buffer.Length;
}
// Synchronized packets contain a frame level timestamp
if (synchronizedMeasurements)
{
timestamp = BigEndian.ToInt64(buffer, responseIndex);
responseIndex += 8;
}
// Deserialize number of measurements that follow
count = BigEndian.ToInt32(buffer, responseIndex);
responseIndex += 4;
if (compressedPayload)
{
if ((object)m_signalIndexCache == null && m_lastMissingCacheWarning + MissingCacheWarningInterval < now)
{
if (m_lastMissingCacheWarning != 0L)
{
// Warning message for missing signal index cache
OnStatusMessage("WARNING: Signal index cache has not arrived. No compact measurements can be parsed.");
}
m_lastMissingCacheWarning = now;
}
else
{
try
{
if (CompressionModes.HasFlag(CompressionModes.TSSC))
{
// Use TSSC compression to decompress measurements
if ((object)m_decompressionBlock == null)
m_decompressionBlock = new MeasurementDecompressionBlock();
MemoryStream bufferStream = new MemoryStream(buffer, responseIndex, responseLength - responseIndex + DataPublisher.ClientResponseHeaderSize);
bool eos = false;
while (!eos)
{
Measurement measurement;
Tuple<Guid, string, uint> tuple;
ushort id;
long time;
uint quality;
float value;
byte command;
switch (m_decompressionBlock.GetMeasurement(out id, out time, out quality, out value, out command))
{
case DecompressionExitCode.EndOfStreamOccured:
if (bufferStream.Position != bufferStream.Length)
m_decompressionBlock.Fill(bufferStream);
else
eos = true;
break;
case DecompressionExitCode.CommandRead:
break;
case DecompressionExitCode.MeasurementRead:
// Attempt to restore signal identification
if (m_signalIndexCache.Reference.TryGetValue(id, out tuple))
{
measurement = new Measurement();
measurement.Key = MeasurementKey.LookUpOrCreate(tuple.Item1, tuple.Item2, tuple.Item3);
measurement.Timestamp = time;
measurement.StateFlags = (MeasurementStateFlags)quality;
measurement.Value = value;
measurements.Add(measurement);
}
break;
}
}
}
else
{
// Decompress compact measurements from payload
measurements.AddRange(buffer.DecompressPayload(m_signalIndexCache, responseIndex, responseLength - responseIndex + DataPublisher.ClientResponseHeaderSize, count, m_includeTime, flags));
}
}
catch (Exception ex)
{
OnProcessException(new InvalidOperationException("WARNING: Decompression failure: " + ex.Message, ex));
}
}
}
else
{
// Deserialize measurements
for (int i = 0; i < count; i++)
{
if (!compactMeasurementFormat)
{
// Deserialize full measurement format
SerializableMeasurement measurement = new SerializableMeasurement(m_encoding);
responseIndex += measurement.ParseBinaryImage(buffer, responseIndex, responseLength - responseIndex);
measurements.Add(measurement);
}
else if ((object)m_signalIndexCache != null)
{
// Deserialize compact measurement format
CompactMeasurement measurement = new CompactMeasurement(m_signalIndexCache, m_includeTime, m_baseTimeOffsets, m_timeIndex, m_useMillisecondResolution);
responseIndex += measurement.ParseBinaryImage(buffer, responseIndex, responseLength - responseIndex);
// Apply timestamp from frame if not included in transmission
if (!measurement.IncludeTime)
measurement.Timestamp = timestamp;
measurements.Add(measurement);
}
else if (m_lastMissingCacheWarning + MissingCacheWarningInterval < now)
{
if (m_lastMissingCacheWarning != 0L)
{
// Warning message for missing signal index cache
OnStatusMessage("WARNING: Signal index cache has not arrived. No compact measurements can be parsed.");
}
m_lastMissingCacheWarning = now;
}
}
}
// Calculate statistics
subscribedDevicesLookup = m_subscribedDevicesLookup;
statisticsHelper = null;
if ((object)subscribedDevicesLookup != null)
{
IEnumerable<IGrouping<DeviceStatisticsHelper<SubscribedDevice>, IMeasurement>> deviceGroups = measurements
.Where(measurement => subscribedDevicesLookup.TryGetValue(measurement.ID, out statisticsHelper))
.Select(measurement => Tuple.Create(statisticsHelper, measurement))
.ToList()
.GroupBy(tuple => tuple.Item1, tuple => tuple.Item2);
foreach (IGrouping<DeviceStatisticsHelper<SubscribedDevice>, IMeasurement> deviceGroup in deviceGroups)
{
statisticsHelper = deviceGroup.Key;
foreach (IGrouping<Ticks, IMeasurement> frame in deviceGroup.GroupBy(measurement => measurement.Timestamp))
{
// Determine the number of measurements received with valid values
int measurementsReceived = frame.Count(measurement => !double.IsNaN(measurement.Value));
IMeasurement statusFlags = null;
IMeasurement frequency = null;
IMeasurement deltaFrequency = null;
// Attempt to update real-time
if (!m_useLocalClockAsRealTime && frame.Key > m_realTime)
m_realTime = frame.Key;
// Search the frame for status flags, frequency, and delta frequency
foreach (IMeasurement measurement in frame)
{
if (measurement.ID == statisticsHelper.Device.StatusFlagsID)
statusFlags = measurement;
else if (measurement.ID == statisticsHelper.Device.FrequencyID)
frequency = measurement;
else if (measurement.ID == statisticsHelper.Device.DeltaFrequencyID)
deltaFrequency = measurement;
}
// If we are receiving status flags for this device,
// count the data quality, time quality, and device errors
if ((object)statusFlags != null)
{
uint commonStatusFlags = (uint)statusFlags.Value;
if ((commonStatusFlags & (uint)Bits.Bit19) > 0)
statisticsHelper.Device.DataQualityErrors++;
if ((commonStatusFlags & (uint)Bits.Bit18) > 0)
statisticsHelper.Device.TimeQualityErrors++;
if ((commonStatusFlags & (uint)Bits.Bit16) > 0)
statisticsHelper.Device.DeviceErrors++;
measurementsReceived--;
}
// Zero is not a valid value for frequency.
// If frequency is zero, invalidate both frequency and delta frequency
if ((object)frequency != null && frequency.Value == 0.0D)
{
if ((object)deltaFrequency != null)
measurementsReceived -= 2;
else
measurementsReceived--;
}
// Track the number of measurements received
statisticsHelper.AddToMeasurementsReceived(measurementsReceived);
}
}
}
// Provide new measurements to local concentrator, if defined, otherwise directly expose them to the consumer
if ((object)m_localConcentrator != null)
m_localConcentrator.SortMeasurements(measurements);
else
OnNewMeasurements(measurements);
// Gather statistics on received data
DateTime timeReceived = RealTime;
if (!m_useLocalClockAsRealTime && timeReceived.Ticks - m_lastStatisticsHelperUpdate > Ticks.PerSecond)
{
UpdateStatisticsHelpers();
m_lastStatisticsHelperUpdate = m_realTime;
}
m_lifetimeMeasurements += measurements.Count;
UpdateMeasurementsPerSecond(timeReceived, measurements.Count);
for (int x = 0; x < measurements.Count; x++)
{
long latency = timeReceived.Ticks - (long)measurements[x].Timestamp;
// Throw out latencies that exceed one hour as invalid
if (Math.Abs(latency) > Time.SecondsPerHour * Ticks.PerSecond)
continue;
if (m_lifetimeMinimumLatency > latency || m_lifetimeMinimumLatency == 0)
m_lifetimeMinimumLatency = latency;
if (m_lifetimeMaximumLatency < latency || m_lifetimeMaximumLatency == 0)
m_lifetimeMaximumLatency = latency;
m_lifetimeTotalLatency += latency;
m_lifetimeLatencyMeasurements++;
}
break;
case ServerResponse.BufferBlock:
// Buffer block received - wrap as a buffer block measurement and expose back to consumer
uint sequenceNumber = BigEndian.ToUInt32(buffer, responseIndex);
int cacheIndex = (int)(sequenceNumber - m_expectedBufferBlockSequenceNumber);
BufferBlockMeasurement bufferBlockMeasurement;
Tuple<Guid, string, uint> measurementKey;
ushort signalIndex;
// Check if this buffer block has already been processed (e.g., mistaken retransmission due to timeout)
if (cacheIndex >= 0 && (cacheIndex >= m_bufferBlockCache.Count || (object)m_bufferBlockCache[cacheIndex] == null))
{
// Send confirmation that buffer block is received
SendServerCommand(ServerCommand.ConfirmBufferBlock, buffer.BlockCopy(responseIndex, 4));
// Get measurement key from signal index cache
signalIndex = BigEndian.ToUInt16(buffer, responseIndex + 4);
if (!m_signalIndexCache.Reference.TryGetValue(signalIndex, out measurementKey))
throw new InvalidOperationException("Failed to find associated signal identification for runtime ID " + signalIndex);
// Skip the sequence number and signal index when creating the buffer block measurement
bufferBlockMeasurement = new BufferBlockMeasurement(buffer, responseIndex + 6, responseLength - 6)
{
Key = MeasurementKey.LookUpOrCreate(measurementKey.Item1, measurementKey.Item2, measurementKey.Item3)
};
// Determine if this is the next buffer block in the sequence
if (sequenceNumber == m_expectedBufferBlockSequenceNumber)
{
List<IMeasurement> bufferBlockMeasurements = new List<IMeasurement>();
int i;
// Add the buffer block measurement to the list of measurements to be published
bufferBlockMeasurements.Add(bufferBlockMeasurement);
m_expectedBufferBlockSequenceNumber++;
// Add cached buffer block measurements to the list of measurements to be published
for (i = 1; i < m_bufferBlockCache.Count; i++)
{
if ((object)m_bufferBlockCache[i] == null)
break;
bufferBlockMeasurements.Add(m_bufferBlockCache[i]);
m_expectedBufferBlockSequenceNumber++;
}
// Remove published measurements from the buffer block queue
if (m_bufferBlockCache.Count > 0)
m_bufferBlockCache.RemoveRange(0, i);
// Publish measurements
OnNewMeasurements(bufferBlockMeasurements);
}
else
{
// Ensure that the list has at least as many
// elements as it needs to cache this measurement
for (int i = m_bufferBlockCache.Count; i <= cacheIndex; i++)
m_bufferBlockCache.Add(null);
// Insert this buffer block into the proper location in the list
m_bufferBlockCache[cacheIndex] = bufferBlockMeasurement;
}
}
m_lifetimeMeasurements += 1;
UpdateMeasurementsPerSecond(DateTime.UtcNow, 1);
break;
case ServerResponse.DataStartTime:
// Raise data start time event
OnDataStartTime(BigEndian.ToInt64(buffer, responseIndex));
break;
case ServerResponse.ProcessingComplete:
// Raise input processing completed event
OnProcessingComplete(InterpretResponseMessage(buffer, responseIndex, responseLength));
break;
case ServerResponse.UpdateSignalIndexCache:
// Deserialize new signal index cache
m_remoteSignalIndexCache = DeserializeSignalIndexCache(buffer.BlockCopy(responseIndex, responseLength));
m_signalIndexCache = new SignalIndexCache(DataSource, m_remoteSignalIndexCache);
FixExpectedMeasurementCounts();
break;
case ServerResponse.UpdateBaseTimes:
// Get active time index
m_timeIndex = BigEndian.ToInt32(buffer, responseIndex);
responseIndex += 4;
// Deserialize new base time offsets
m_baseTimeOffsets = new[] { BigEndian.ToInt64(buffer, responseIndex), BigEndian.ToInt64(buffer, responseIndex + 8) };
break;
case ServerResponse.UpdateCipherKeys:
// Move past active cipher index (not currently used anywhere else)
responseIndex++;
// Extract remaining response
byte[] bytes = buffer.BlockCopy(responseIndex, responseLength - 1);
// Decrypt response payload if subscription is authenticated
if (m_authenticated)
bytes = bytes.Decrypt(m_sharedSecret, CipherStrength.Aes256);
// Deserialize new cipher keys
keyIVs = new byte[2][][];
keyIVs[EvenKey] = new byte[2][];
keyIVs[OddKey] = new byte[2][];
int index = 0;
int bufferLen;
// Read even key size
bufferLen = BigEndian.ToInt32(bytes, index);
index += 4;
// Read even key
keyIVs[EvenKey][KeyIndex] = new byte[bufferLen];
Buffer.BlockCopy(bytes, index, keyIVs[EvenKey][KeyIndex], 0, bufferLen);
index += bufferLen;
// Read even initialization vector size
bufferLen = BigEndian.ToInt32(bytes, index);
index += 4;
// Read even initialization vector
keyIVs[EvenKey][IVIndex] = new byte[bufferLen];
Buffer.BlockCopy(bytes, index, keyIVs[EvenKey][IVIndex], 0, bufferLen);
index += bufferLen;
// Read odd key size
bufferLen = BigEndian.ToInt32(bytes, index);
index += 4;
// Read odd key
keyIVs[OddKey][KeyIndex] = new byte[bufferLen];
Buffer.BlockCopy(bytes, index, keyIVs[OddKey][KeyIndex], 0, bufferLen);
index += bufferLen;
// Read odd initialization vector size
bufferLen = BigEndian.ToInt32(bytes, index);
index += 4;
// Read odd initialization vector
keyIVs[OddKey][IVIndex] = new byte[bufferLen];
Buffer.BlockCopy(bytes, index, keyIVs[OddKey][IVIndex], 0, bufferLen);
//index += bufferLen;
// Exchange keys
m_keyIVs = keyIVs;
OnStatusMessage("Successfully established new cipher keys for data packet transmissions.");
break;
case ServerResponse.Notify:
// Skip the 4-byte hash
string message = m_encoding.GetString(buffer, responseIndex + 4, responseLength - 4);
// Display notification
OnStatusMessage("NOTIFICATION: {0}", message);
OnNotificationReceived(message);
// Send confirmation of receipt of the notification
SendServerCommand(ServerCommand.ConfirmNotification, buffer.BlockCopy(responseIndex, 4));
break;
case ServerResponse.ConfigurationChanged:
OnStatusMessage("Received notification from publisher that configuration has changed.");
OnServerConfigurationChanged();
// Initiate meta-data refresh when publisher configuration has changed - we only do this
// for automatic connections since API style connections have to manually initiate a
// meta-data refresh. API style connection should attach to server configuration changed
// event and request meta-data refresh to complete automated cycle.
if (m_autoConnect && m_autoSynchronizeMetadata)
SendServerCommand(ServerCommand.MetaDataRefresh, m_metadataFilters);
break;
}
}
catch (Exception ex)
{
OnProcessException(new InvalidOperationException("Failed to process publisher response packet due to exception: " + ex.Message, ex));
}
}
}
/// <summary>
/// Event handler for service stopping operation.
/// </summary>
/// <param name="sender">Event source.</param>
/// <param name="e">Event arguments.</param>
/// <remarks>
/// Time-series framework uses this handler to un-wire events and dispose of system objects.
/// </remarks>
protected virtual void ServiceStoppingHandler(object sender, EventArgs e)
{
// Dispose system health exporter
if ((object)m_healthExporter != null)
{
m_healthExporter.Enabled = false;
m_serviceHelper.ServiceComponents.Remove(m_healthExporter);
m_healthExporter.Dispose();
m_healthExporter.StatusMessage -= m_iaonSession.StatusMessageHandler;
m_healthExporter.ProcessException -= m_iaonSession.ProcessExceptionHandler;
m_healthExporter = null;
}
// Dispose system status exporter
if ((object)m_statusExporter != null)
{
m_statusExporter.Enabled = false;
m_serviceHelper.ServiceComponents.Remove(m_statusExporter);
m_statusExporter.Dispose();
m_statusExporter.StatusMessage -= m_iaonSession.StatusMessageHandler;
m_statusExporter.ProcessException -= m_iaonSession.ProcessExceptionHandler;
m_statusExporter = null;
}
// Dispose reload config queue
if ((object)m_reloadConfigQueue != null)
{
m_reloadConfigQueue.ProcessException -= m_iaonSession.ProcessExceptionHandler;
m_reloadConfigQueue.Dispose();
m_reloadConfigQueue = null;
}
// Dispose reporting processes
if ((object)m_reportingProcesses != null)
{
m_serviceHelper.ServiceComponents.Remove(m_reportingProcesses);
m_reportingProcesses = null;
}
// Dispose Iaon session
if ((object)m_iaonSession != null)
{
m_serviceHelper.ServiceComponents.Remove(m_iaonSession.InputAdapters);
m_serviceHelper.ServiceComponents.Remove(m_iaonSession.ActionAdapters);
m_serviceHelper.ServiceComponents.Remove(m_iaonSession.OutputAdapters);
m_iaonSession.Dispose();
m_iaonSession.StatusMessage -= StatusMessageHandler;
m_iaonSession.ProcessException -= ProcessExceptionHandler;
m_iaonSession.ConfigurationChanged -= ConfigurationChangedHandler;
m_iaonSession = null;
}
// Dispose of run-time log
if ((object)m_runTimeLog != null)
{
m_serviceHelper.ServiceComponents.Remove(m_runTimeLog);
m_runTimeLog.ProcessException -= ProcessExceptionHandler;
m_runTimeLog.Dispose();
m_runTimeLog = null;
}
m_serviceHelper.ServiceStarting -= ServiceStartingHandler;
m_serviceHelper.ServiceStarted -= ServiceStartedHandler;
m_serviceHelper.ServiceStopping -= ServiceStoppingHandler;
m_serviceHelper.UpdatedStatus -= UpdatedStatusHandler;
m_serviceHelper.LoggedException -= LoggedExceptionHandler;
if ((object)m_serviceHelper.StatusLog != null)
{
m_serviceHelper.StatusLog.Flush();
m_serviceHelper.StatusLog.LogException -= LogExceptionHandler;
}
if ((object)m_serviceHelper.ErrorLogger != null && (object)m_serviceHelper.ErrorLogger.ErrorLog != null)
{
m_serviceHelper.ErrorLogger.ErrorLog.Flush();
m_serviceHelper.ErrorLogger.ErrorLog.LogException -= LogExceptionHandler;
}
// Detach from handler for unobserved task exceptions
TaskScheduler.UnobservedTaskException -= TaskScheduler_UnobservedTaskException;
ShutdownHandler.InitiateSafeShutdown();
}
/// <summary>
/// Releases the unmanaged resources used by the <see cref="DataSubscriber"/> 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)
{
DataLossInterval = 0.0D;
CommandChannel = null;
DataChannel = null;
DisposeLocalConcentrator();
if ((object)m_dataGapRecoverer != null)
{
m_dataGapRecoverer.RecoveredMeasurements -= m_dataGapRecoverer_RecoveredMeasurements;
m_dataGapRecoverer.StatusMessage -= m_dataGapRecoverer_StatusMessage;
m_dataGapRecoverer.ProcessException -= m_dataGapRecoverer_ProcessException;
m_dataGapRecoverer.Dispose();
m_dataGapRecoverer = null;
}
if ((object)m_runTimeLog != null)
{
m_runTimeLog.ProcessException -= m_runTimeLog_ProcessException;
m_runTimeLog.Dispose();
m_runTimeLog = null;
}
if ((object)m_subscribedDevicesTimer != null)
{
m_subscribedDevicesTimer.Elapsed -= SubscribedDevicesTimer_Elapsed;
m_subscribedDevicesTimer.Dispose();
m_subscribedDevicesTimer = null;
}
}
}
finally
{
m_disposed = true; // Prevent duplicate dispose.
base.Dispose(disposing); // Call base class Dispose().
}
}
}
/// <summary>
/// Event handler for service starting operations.
/// </summary>
/// <param name="sender">Event source.</param>
/// <param name="e">Event arguments containing command line arguments passed into service at startup.</param>
/// <remarks>
/// Time-series framework uses this handler to load settings from configuration file as service is starting.
/// </remarks>
protected virtual void ServiceStartingHandler(object sender, EventArgs<string[]> e)
{
ShutdownHandler.Initialize();
// Define a run-time log
m_runTimeLog = new RunTimeLog();
m_runTimeLog.FileName = "RunTimeLog.txt";
m_runTimeLog.ProcessException += ProcessExceptionHandler;
m_runTimeLog.Initialize();
// Initialize Iaon session
m_iaonSession = new IaonSession();
m_iaonSession.StatusMessage += StatusMessageHandler;
m_iaonSession.ProcessException += ProcessExceptionHandler;
m_iaonSession.ConfigurationChanged += ConfigurationChangedHandler;
// Create a handler for unobserved task exceptions
TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;
// Make sure default service settings exist
ConfigurationFile configFile = ConfigurationFile.Current;
string servicePath = FilePath.GetAbsolutePath("");
string cachePath = string.Format("{0}{1}ConfigurationCache{1}", servicePath, Path.DirectorySeparatorChar);
string defaultLogPath = string.Format("{0}{1}Logs{1}", servicePath, Path.DirectorySeparatorChar);
// System settings
CategorizedSettingsElementCollection systemSettings = configFile.Settings["systemSettings"];
systemSettings.Add("ConfigurationType", "Database", "Specifies type of configuration: Database, WebService, BinaryFile or XmlFile");
systemSettings.Add("ConnectionString", "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=IaonHost.mdb", "Configuration database connection string");
systemSettings.Add("DataProviderString", "AssemblyName={System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089};ConnectionType=System.Data.OleDb.OleDbConnection;AdapterType=System.Data.OleDb.OleDbDataAdapter", "Configuration database ADO.NET data provider assembly type creation string");
systemSettings.Add("ConfigurationCachePath", cachePath, "Defines the path used to cache serialized configurations");
systemSettings.Add("LogPath", defaultLogPath, "Defines the path used to archive log files");
systemSettings.Add("MaxLogFiles", DefaultMaxLogFiles, "Defines the maximum number of log files to keep");
systemSettings.Add("CachedConfigurationFile", "SystemConfiguration.xml", "File name for last known good system configuration (only cached for a Database or WebService connection)");
systemSettings.Add("UniqueAdaptersIDs", "True", "Set to true if all runtime adapter ID's will be unique to allow for easier adapter specification");
systemSettings.Add("ProcessPriority", "High", "Sets desired process priority: Normal, AboveNormal, High, RealTime");
systemSettings.Add("AllowRemoteRestart", "True", "Controls ability to remotely restart the host service.");
systemSettings.Add("MinThreadPoolWorkerThreads", DefaultMinThreadPoolSize, "Defines the minimum number of allowed thread pool worker threads.");
systemSettings.Add("MaxThreadPoolWorkerThreads", DefaultMaxThreadPoolSize, "Defines the maximum number of allowed thread pool worker threads.");
systemSettings.Add("MinThreadPoolIOPortThreads", DefaultMinThreadPoolSize, "Defines the minimum number of allowed thread pool I/O completion port threads (used by socket layer).");
systemSettings.Add("MaxThreadPoolIOPortThreads", DefaultMaxThreadPoolSize, "Defines the maximum number of allowed thread pool I/O completion port threads (used by socket layer).");
systemSettings.Add("ConfigurationBackups", DefaultConfigurationBackups, "Defines the total number of older backup configurations to maintain.");
systemSettings.Add("PreferCachedConfiguration", "False", "Set to true to try the cached configuration first, before loading database configuration - typically used when cache is updated by external process.");
systemSettings.Add("LocalCertificate", $"{ServiceName}.cer", "Path to the local certificate used by this server for authentication.");
systemSettings.Add("RemoteCertificatesPath", @"Certs\Remotes", "Path to the directory where remote certificates are stored.");
systemSettings.Add("DefaultCulture", "en-US", "Default culture to use for language, country/region and calendar formats.");
// Example connection settings
CategorizedSettingsElementCollection exampleSettings = configFile.Settings["exampleConnectionSettings"];
exampleSettings.Add("SqlServer.ConnectionString", "Data Source=serverName; Initial Catalog=databaseName; User ID=userName; Password=password", "Example SQL Server database connection string");
exampleSettings.Add("SqlServer.DataProviderString", "AssemblyName={System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089}; ConnectionType=System.Data.SqlClient.SqlConnection; AdapterType=System.Data.SqlClient.SqlDataAdapter", "Example SQL Server database .NET provider string");
exampleSettings.Add("MySQL.ConnectionString", "Server=serverName;Database=databaseName; Uid=root; Pwd=password; allow user variables = true;", "Example MySQL database connection string");
exampleSettings.Add("MySQL.DataProviderString", "AssemblyName={MySql.Data, Version=6.3.6.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d}; ConnectionType=MySql.Data.MySqlClient.MySqlConnection; AdapterType=MySql.Data.MySqlClient.MySqlDataAdapter", "Example MySQL database .NET provider string");
exampleSettings.Add("Oracle.ConnectionString", "Data Source=tnsName; User ID=schemaUserName; Password=schemaPassword", "Example Oracle database connection string");
exampleSettings.Add("Oracle.DataProviderString", "AssemblyName={Oracle.DataAccess, Version=2.112.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342}; ConnectionType=Oracle.DataAccess.Client.OracleConnection; AdapterType=Oracle.DataAccess.Client.OracleDataAdapter", "Example Oracle database .NET provider string");
exampleSettings.Add("SQLite.ConnectionString", "Data Source=databaseName.db; Version=3; Foreign Keys=True; FailIfMissing=True", "Example SQLite database connection string");
exampleSettings.Add("SQLite.DataProviderString", "AssemblyName={System.Data.SQLite, Version=1.0.99.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139}; ConnectionType=System.Data.SQLite.SQLiteConnection; AdapterType=System.Data.SQLite.SQLiteDataAdapter", "Example SQLite database .NET provider string");
exampleSettings.Add("OleDB.ConnectionString", "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=databaseName.mdb", "Example Microsoft Access (via OleDb) database connection string");
exampleSettings.Add("OleDB.DataProviderString", "AssemblyName={System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089}; ConnectionType=System.Data.OleDb.OleDbConnection; AdapterType=System.Data.OleDb.OleDbDataAdapter", "Example OleDb database .NET provider string");
exampleSettings.Add("Odbc.ConnectionString", "Driver={SQL Server Native Client 10.0}; Server=serverName; Database=databaseName; Uid=userName; Pwd=password;", "Example ODBC database connection string");
exampleSettings.Add("Odbc.DataProviderString", "AssemblyName={System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089}; ConnectionType=System.Data.Odbc.OdbcConnection; AdapterType=System.Data.Odbc.OdbcDataAdapter", "Example ODBC database .NET provider string");
exampleSettings.Add("WebService.ConnectionString", "http://localhost/ConfigSource/SystemConfiguration.xml", "Example web service connection string");
exampleSettings.Add("XmlFile.ConnectionString", "SystemConfiguration.xml", "Example XML configuration file connection string");
// Attempt to set default culture
try
{
string defaultCulture = systemSettings["DefaultCulture"].ValueAs("en-US");
CultureInfo.DefaultThreadCurrentCulture = CultureInfo.CreateSpecificCulture(defaultCulture); // Defaults for date formatting, etc.
CultureInfo.DefaultThreadCurrentUICulture = CultureInfo.CreateSpecificCulture(defaultCulture); // Culture for resource strings, etc.
}
catch (Exception ex)
{
DisplayStatusMessage("Failed to set default culture due to exception, defaulting to \"{1}\": {0}", UpdateType.Alarm, ex.Message, CultureInfo.CurrentCulture.Name.ToNonNullNorEmptyString("Undetermined"));
LogException(ex);
}
// Retrieve application log path as defined in the config file
string logPath = FilePath.GetAbsolutePath(systemSettings["LogPath"].Value);
// Make sure log directory exists
try
{
if (!Directory.Exists(logPath))
Directory.CreateDirectory(logPath);
}
catch (Exception ex)
{
// Attempt to default back to common log file path
if (!Directory.Exists(defaultLogPath))
{
try
{
Directory.CreateDirectory(defaultLogPath);
}
catch
{
defaultLogPath = servicePath;
}
}
DisplayStatusMessage("Failed to create logging directory \"{0}\" due to exception, defaulting to \"{1}\": {2}", UpdateType.Alarm, logPath, defaultLogPath, ex.Message);
LogException(ex);
logPath = defaultLogPath;
}
int maxLogFiles = systemSettings["MaxLogFiles"].ValueAs(DefaultMaxLogFiles);
try
{
Logger.FileWriter.SetPath(logPath);
Logger.FileWriter.SetLoggingFileCount(maxLogFiles);
}
catch (Exception ex)
{
DisplayStatusMessage("Failed to set logging path \"{0}\" or max file count \"{1}\" due to exception: {2}", UpdateType.Alarm, logPath, maxLogFiles, ex.Message);
LogException(ex);
}
// Retrieve configuration cache directory as defined in the config file
cachePath = FilePath.GetAbsolutePath(systemSettings["ConfigurationCachePath"].Value);
// Make sure configuration cache directory exists
try
{
if (!Directory.Exists(cachePath))
Directory.CreateDirectory(cachePath);
}
catch (Exception ex)
{
DisplayStatusMessage("Failed to create configuration cache directory \"{0}\" due to exception: {1}", UpdateType.Alarm, cachePath, ex.Message);
LogException(ex);
}
try
{
Directory.SetCurrentDirectory(servicePath);
}
catch (Exception ex)
{
DisplayStatusMessage("Failed to set current directory to execution path \"{0}\" due to exception: {1}", UpdateType.Alarm, servicePath, ex.Message);
LogException(ex);
}
// Initialize system settings
m_configurationType = systemSettings["ConfigurationType"].ValueAs<ConfigurationType>();
m_cachedXmlConfigurationFile = FilePath.AddPathSuffix(cachePath) + systemSettings["CachedConfigurationFile"].Value;
m_cachedBinaryConfigurationFile = FilePath.AddPathSuffix(cachePath) + FilePath.GetFileNameWithoutExtension(m_cachedXmlConfigurationFile) + ".bin";
m_configurationBackups = systemSettings["ConfigurationBackups"].ValueAs(DefaultConfigurationBackups);
m_uniqueAdapterIDs = systemSettings["UniqueAdaptersIDs"].ValueAsBoolean(true);
m_allowRemoteRestart = systemSettings["AllowRemoteRestart"].ValueAsBoolean(true);
m_preferCachedConfiguration = systemSettings["PreferCachedConfiguration"].ValueAsBoolean(false);
m_reloadConfigQueue = ProcessQueue<Tuple<string, Action<bool>>>.CreateSynchronousQueue(ExecuteReloadConfig, 500.0D, Timeout.Infinite, false, false);
m_reloadConfigQueue.ProcessException += m_iaonSession.ProcessExceptionHandler;
m_configurationCacheOperation = new LongSynchronizedOperation(ExecuteConfigurationCache)
{
IsBackground = true
};
// Setup default thread pool size
try
{
ThreadPool.SetMinThreads(systemSettings["MinThreadPoolWorkerThreads"].ValueAs(DefaultMinThreadPoolSize), systemSettings["MinThreadPoolIOPortThreads"].ValueAs(DefaultMinThreadPoolSize));
ThreadPool.SetMaxThreads(systemSettings["MaxThreadPoolWorkerThreads"].ValueAs(DefaultMaxThreadPoolSize), systemSettings["MaxThreadPoolIOPortThreads"].ValueAs(DefaultMaxThreadPoolSize));
}
catch (Exception ex)
{
DisplayStatusMessage("Failed to set desired thread pool size due to exception: {0}", UpdateType.Alarm, ex.Message);
LogException(ex);
}
// Define guid with query string delimiters according to database needs
if (string.IsNullOrWhiteSpace(m_nodeIDQueryString))
m_nodeIDQueryString = "'" + m_iaonSession.NodeID + "'";
// Set up the configuration loader
switch (m_configurationType)
{
case ConfigurationType.Database:
m_configurationLoader = new DatabaseConfigurationLoader
{
ConnectionString = systemSettings["ConnectionString"].Value,
DataProviderString = systemSettings["DataProviderString"].Value,
NodeIDQueryString = m_nodeIDQueryString
};
break;
case ConfigurationType.WebService:
m_configurationLoader = new WebServiceConfigurationLoader
{
URI = systemSettings["ConnectionString"].Value
};
break;
case ConfigurationType.BinaryFile:
m_configurationLoader = new BinaryFileConfigurationLoader
{
FilePath = systemSettings["ConnectionString"].Value
};
break;
case ConfigurationType.XmlFile:
m_configurationLoader = new XMLConfigurationLoader
{
FilePath = systemSettings["ConnectionString"].Value
};
break;
}
m_binaryCacheConfigurationLoader = new BinaryFileConfigurationLoader
{
FilePath = m_cachedBinaryConfigurationFile
};
m_xmlCacheConfigurationLoader = new XMLConfigurationLoader
{
FilePath = m_cachedXmlConfigurationFile
};
m_configurationLoader.StatusMessage += (o, args) => DisplayStatusMessage(args.Argument, UpdateType.Information);
m_binaryCacheConfigurationLoader.StatusMessage += (o, args) => DisplayStatusMessage(args.Argument, UpdateType.Information);
m_xmlCacheConfigurationLoader.StatusMessage += (o, args) => DisplayStatusMessage(args.Argument, UpdateType.Information);
m_configurationLoader.ProcessException += ConfigurationLoader_ProcessException;
m_binaryCacheConfigurationLoader.ProcessException += ConfigurationLoader_ProcessException;
m_xmlCacheConfigurationLoader.ProcessException += ConfigurationLoader_ProcessException;
m_reloadConfigQueue.Start();
#if !MONO
try
{
// Attempt to assign desired process priority. Note that process will require SeIncreaseBasePriorityPrivilege or
// Administrative privileges to make this change
Process.GetCurrentProcess().PriorityClass = systemSettings["ProcessPriority"].ValueAs<ProcessPriorityClass>();
}
catch (Exception ex)
{
LogException(ex);
}
#endif
}