/// <summary>
/// Initializes <see cref="SynchronizedClientSubscription"/>.
/// </summary>
public override void Initialize()
{
MeasurementKey[] inputMeasurementKeys;
string setting;
if (Settings.TryGetValue("inputMeasurementKeys", out setting))
{
// IMPORTANT: The allowSelect argument of ParseInputMeasurementKeys must be null
// in order to prevent SQL injection via the subscription filter expression
inputMeasurementKeys = AdapterBase.ParseInputMeasurementKeys(DataSource, false, setting);
m_requestedInputFilter = setting;
// IMPORTANT: We need to remove the setting before calling base.Initialize()
// or else we will still be subject to SQL injection
Settings.Remove("inputMeasurementKeys");
}
else
{
inputMeasurementKeys = new MeasurementKey[0];
m_requestedInputFilter = null;
}
base.Initialize();
// Set the InputMeasurementKeys and UsePrecisionTimer properties after calling
// base.Initialize() so that the base class does not overwrite our settings
InputMeasurementKeys = inputMeasurementKeys;
UsePrecisionTimer = false;
if (Settings.TryGetValue("bufferBlockRetransmissionTimeout", out setting))
m_bufferBlockRetransmissionTimeout = double.Parse(setting);
else
m_bufferBlockRetransmissionTimeout = 5.0D;
if (Settings.TryGetValue("requestNaNValueFilter", out setting))
m_isNaNFiltered = m_parent.AllowNaNValueFilter && setting.ParseBoolean();
else
m_isNaNFiltered = false;
m_bufferBlockRetransmissionTimer = new Timer();
m_bufferBlockRetransmissionTimer.AutoReset = false;
m_bufferBlockRetransmissionTimer.Interval = m_bufferBlockRetransmissionTimeout * 1000.0D;
m_bufferBlockRetransmissionTimer.Elapsed += BufferBlockRetransmissionTimer_Elapsed;
// Handle temporal session initialization
if (this.TemporalConstraintIsDefined())
m_iaonSession = this.CreateTemporalSession();
}
/// <summary>
/// Initializes <see cref="SynchronizedClientSubscription"/>.
/// </summary>
public override void Initialize()
{
base.Initialize();
base.UsePrecisionTimer = false;
if (!Settings.TryGetValue("inputMeasurementKeys", out m_requestedInputFilter))
m_requestedInputFilter = null;
// Handle temporal session intialization
if (this.TemporalConstraintIsDefined())
m_iaonSession = this.CreateTemporalSession();
}
/// <summary>
/// Initializes <see cref="SynchronizedClientSubscription"/>.
/// </summary>
public override void Initialize()
{
string setting;
base.Initialize();
base.UsePrecisionTimer = false;
Settings.TryGetValue("inputMeasurementKeys", out m_requestedInputFilter);
if (Settings.TryGetValue("bufferBlockRetransmissionTimeout", out setting))
m_bufferBlockRetransmissionTimeout = double.Parse(setting);
else
m_bufferBlockRetransmissionTimeout = 5.0D;
if (Settings.TryGetValue("requestNaNValueFiltering", out setting))
m_isNaNFiltered = m_parent.AllowNaNValueFilter && setting.ParseBoolean();
else
m_isNaNFiltered = false;
m_bufferBlockRetransmissionTimer = new Timer();
m_bufferBlockRetransmissionTimer.AutoReset = false;
m_bufferBlockRetransmissionTimer.Interval = m_bufferBlockRetransmissionTimeout * 1000.0D;
m_bufferBlockRetransmissionTimer.Elapsed += BufferBlockRetransmissionTimer_Elapsed;
// Handle temporal session initialization
if (this.TemporalConstraintIsDefined())
m_iaonSession = this.CreateTemporalSession();
}
/// <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
}
/// <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>
/// Disposes a temporal <see cref="IaonSession"/> created using <see cref="CreateTemporalSession"/>.
/// </summary>
/// <param name="adapter"><see cref="IClientSubscription"/> source instance.</param>
/// <param name="session"><see cref="IaonSession"/> instance to dispose.</param>
public static void DisposeTemporalSession(this IClientSubscription adapter, ref IaonSession session)
{
if ((object)session != null)
{
EventHandler<EventArgs<string, UpdateType>> statusMessageFunction;
EventHandler<EventArgs<Exception>> processExceptionFunction;
EventHandler processingCompletedFunction;
// Remove and detach from event handlers
if (s_statusMessageHandlers.TryRemove(adapter, out statusMessageFunction))
session.StatusMessage -= statusMessageFunction;
if (s_processExceptionHandlers.TryRemove(adapter, out processExceptionFunction))
session.ProcessException -= processExceptionFunction;
if (s_processingCompletedHandlers.TryRemove(adapter, out processingCompletedFunction))
session.ProcessingComplete -= processingCompletedFunction;
session.Dispose();
}
session = null;
}
/// <summary>
/// Returns a new temporal <see cref="IaonSession"/> for a <see cref="IClientSubscription"/>.
/// </summary>
/// <param name="clientSubscription"><see cref="IClientSubscription"/> instance to create temporal <see cref="IaonSession"/> for.</param>
/// <returns>New temporal <see cref="IaonSession"/> for a <see cref="IClientSubscription"/>.</returns>
public static IaonSession CreateTemporalSession(this IClientSubscription clientSubscription)
{
IaonSession session;
// Cache the specified input measurement keys requested by the remote subscription
// internally since these will only be needed in the private Iaon session
MeasurementKey[] inputMeasurementKeys = clientSubscription.InputMeasurementKeys;
IMeasurement[] outputMeasurements = clientSubscription.OutputMeasurements;
// Since historical data is requested, we "turn off" interaction with the outside real-time world
// by removing the client subscription adapter from external routes. To accomplish this we expose
// I/O demands for an undefined measurement as assigning to null would mean "broadcast" is desired.
clientSubscription.InputMeasurementKeys = new[] { MeasurementKey.Undefined };
clientSubscription.OutputMeasurements = new IMeasurement[] { Measurement.Undefined };
// Create a new Iaon session
session = new IaonSession();
session.Name = "<" + clientSubscription.HostName.ToNonNullString("unavailable") + ">@" + clientSubscription.StartTimeConstraint.ToString("yyyy-MM-dd HH:mm:ss");
// Assign requested input measurement keys as a routing restriction
session.InputMeasurementKeysRestriction = inputMeasurementKeys;
// Setup default bubbling event handlers associated with the client session adapter
EventHandler<EventArgs<string, UpdateType>> statusMessageHandler = (sender, e) =>
{
if (e.Argument2 == UpdateType.Information)
clientSubscription.OnStatusMessage(e.Argument1);
else
clientSubscription.OnStatusMessage("0x" + (int)e.Argument2 + e.Argument1);
};
EventHandler<EventArgs<Exception>> processExceptionHandler = (sender, e) => clientSubscription.OnProcessException(e.Argument);
EventHandler processingCompletedHandler = clientSubscription.OnProcessingCompleted;
// Cache dynamic event handlers so they can be detached later
s_statusMessageHandlers[clientSubscription] = statusMessageHandler;
s_processExceptionHandlers[clientSubscription] = processExceptionHandler;
s_processingCompletedHandlers[clientSubscription] = processingCompletedHandler;
// Attach handlers to new session - this will proxy all temporal session messages through the client session adapter
session.StatusMessage += statusMessageHandler;
session.ProcessException += processExceptionHandler;
session.ProcessingComplete += processingCompletedHandler;
// Send the first message indicating a new temporal session is being established
statusMessageHandler(null, new EventArgs<string, UpdateType>(
string.Format("Initializing temporal session for host \"{0}\" spanning {1} to {2} processing data {3}...",
clientSubscription.HostName.ToNonNullString("unknown"),
clientSubscription.StartTimeConstraint.ToString("yyyy-MM-dd HH:mm:ss.fff"),
clientSubscription.StopTimeConstraint.ToString("yyyy-MM-dd HH:mm:ss.fff"),
clientSubscription.ProcessingInterval == 0 ? "as fast as possible" :
clientSubscription.ProcessingInterval == -1 ? "at the default rate" : "at " + clientSubscription.ProcessingInterval + "ms intervals"),
UpdateType.Information));
// Duplicate current real-time session configuration for adapters that report temporal support
session.DataSource = IaonSession.ExtractTemporalConfiguration(clientSubscription.DataSource);
// Initialize temporal session adapters without starting them
session.Initialize(false);
// Define an in-situ action adapter for the temporal Iaon session used to proxy data back to the client subscription. Note
// to enable adapters that are connect-on-demand in the temporal session, we must make sure the proxy adapter is setup to
// respect input demands. The proxy adapter produces no points into the temporal session - all received points are simply
// internally proxied out to the parent client subscription outside the purview of the Iaon session; from the perspective
// of the Iaon session, points seem to dead-end in the proxy adapter. The proxy adapter is an action adapter and action
// adapters typically produce measurements, as such, actions default to respecting output demands not input demands. Using
// the default settings of not respecting input demands and the proxy adapter not producing any points, the Iaon session
// would ignore the adapter's input needs. In this case we want Iaon session to recognize the inputs of the proxy adapter
// as important to the connect-on-demand dependency chain, so we request respect for the input demands.
TemporalClientSubscriptionProxy proxyAdapter = new TemporalClientSubscriptionProxy
{
// Assign critical adapter properties
ID = 0,
Name = "PROXY!SERVICES",
ConnectionString = "",
DataSource = session.DataSource,
RespectInputDemands = true,
InputMeasurementKeys = inputMeasurementKeys,
OutputMeasurements = outputMeasurements,
Parent = clientSubscription,
Initialized = true
};
// Add new proxy adapter to temporal session action adapter collection - this will start adapter
session.ActionAdapters.Add(proxyAdapter);
// Load current temporal constraint parameters
Dictionary<string, string> settings = clientSubscription.Settings;
string startTime, stopTime, parameters;
settings.TryGetValue("startTimeConstraint", out startTime);
settings.TryGetValue("stopTimeConstraint", out stopTime);
settings.TryGetValue("timeConstraintParameters", out parameters);
// Assign requested temporal constraints to all private session adapters
session.AllAdapters.SetTemporalConstraint(startTime, stopTime, parameters);
session.AllAdapters.ProcessingInterval = clientSubscription.ProcessingInterval;
// Start temporal session adapters
session.AllAdapters.Start();
// Recalculate routing tables to accommodate addition of proxy adapter and handle
// input measurement keys restriction
session.RecalculateRoutingTables();
return session;
}
/// <summary>
/// Initializes <see cref="UnsynchronizedClientSubscription"/>.
/// </summary>
public override void Initialize()
{
MeasurementKey[] inputMeasurementKeys;
string setting;
if (Settings.TryGetValue("inputMeasurementKeys", out setting))
{
// IMPORTANT: The allowSelect argument of ParseInputMeasurementKeys must be null
// in order to prevent SQL injection via the subscription filter expression
inputMeasurementKeys = ParseInputMeasurementKeys(DataSource, false, setting);
m_requestedInputFilter = setting;
// IMPORTANT: We need to remove the setting before calling base.Initialize()
// or else we will still be subject to SQL injection
Settings.Remove("inputMeasurementKeys");
}
else
{
inputMeasurementKeys = new MeasurementKey[0];
m_requestedInputFilter = null;
}
base.Initialize();
// Set the InputMeasurementKeys property after calling base.Initialize()
// so that the base class does not overwrite our setting
InputMeasurementKeys = inputMeasurementKeys;
if (Settings.TryGetValue("publishInterval", out setting))
m_publishInterval = int.Parse(setting);
else
m_publishInterval = -1;
if (Settings.TryGetValue("includeTime", out setting))
m_includeTime = setting.ParseBoolean();
else
m_includeTime = true;
if (Settings.TryGetValue("useMillisecondResolution", out setting))
m_useMillisecondResolution = setting.ParseBoolean();
else
m_useMillisecondResolution = false;
if (Settings.TryGetValue("requestNaNValueFilter", out setting))
m_isNaNFiltered = m_parent.AllowNaNValueFilter && setting.ParseBoolean();
else
m_isNaNFiltered = false;
if (Settings.TryGetValue("bufferBlockRetransmissionTimeout", out setting))
m_bufferBlockRetransmissionTimeout = double.Parse(setting);
else
m_bufferBlockRetransmissionTimeout = 5.0D;
if (m_parent.UseBaseTimeOffsets && m_includeTime)
{
m_baseTimeRotationTimer = Common.TimerScheduler.CreateTimer(m_useMillisecondResolution ? 60000 : 420000);
m_baseTimeRotationTimer.AutoReset = true;
m_baseTimeRotationTimer.Elapsed += BaseTimeRotationTimer_Elapsed;
}
m_bufferBlockRetransmissionTimer = Common.TimerScheduler.CreateTimer((int)(m_bufferBlockRetransmissionTimeout * 1000.0D));
m_bufferBlockRetransmissionTimer.AutoReset = false;
m_bufferBlockRetransmissionTimer.Elapsed += BufferBlockRetransmissionTimer_Elapsed;
// Handle temporal session initialization
if (this.TemporalConstraintIsDefined())
m_iaonSession = this.CreateTemporalSession();
}
/// <summary>
/// Initializes <see cref="UnsynchronizedClientSubscription"/>.
/// </summary>
public override void Initialize()
{
base.Initialize();
string setting;
if (Settings.TryGetValue("inputMeasurementKeys", out setting))
m_requestedInputFilter = setting;
else
m_requestedInputFilter = null;
if (Settings.TryGetValue("publishInterval", out setting))
m_publishInterval = int.Parse(setting);
else
m_publishInterval = -1;
if (Settings.TryGetValue("includeTime", out setting))
m_includeTime = setting.ParseBoolean();
else
m_includeTime = true;
if (Settings.TryGetValue("useMillisecondResolution", out setting))
m_useMillisecondResolution = setting.ParseBoolean();
else
m_useMillisecondResolution = false;
if (m_parent.UseBaseTimeOffsets && m_includeTime)
{
m_baseTimeRotationTimer = new System.Timers.Timer();
m_baseTimeRotationTimer.Interval = m_useMillisecondResolution ? 60000 : 420000;
m_baseTimeRotationTimer.AutoReset = true;
m_baseTimeRotationTimer.Elapsed += BaseTimeRotationTimer_Elapsed;
}
// Handle temporal session intialization
if (this.TemporalConstraintIsDefined())
m_iaonSession = this.CreateTemporalSession();
}
/// <summary>
/// Initializes <see cref="UnsynchronizedClientSubscription"/>.
/// </summary>
public override void Initialize()
{
base.Initialize();
string setting;
if (Settings.TryGetValue("inputMeasurementKeys", out setting))
m_requestedInputFilter = setting;
else
m_requestedInputFilter = null;
if (Settings.TryGetValue("publishInterval", out setting))
m_publishInterval = int.Parse(setting);
else
m_publishInterval = -1;
if (Settings.TryGetValue("includeTime", out setting))
m_includeTime = setting.ParseBoolean();
else
m_includeTime = true;
if (Settings.TryGetValue("useMillisecondResolution", out setting))
m_useMillisecondResolution = setting.ParseBoolean();
else
m_useMillisecondResolution = false;
if (Settings.TryGetValue("requestNaNValueFilter", out setting))
m_isNaNFiltered = m_parent.AllowNaNValueFilter && setting.ParseBoolean();
else
m_isNaNFiltered = false;
if (Settings.TryGetValue("bufferBlockRetransmissionTimeout", out setting))
m_bufferBlockRetransmissionTimeout = double.Parse(setting);
else
m_bufferBlockRetransmissionTimeout = 5.0D;
if (m_parent.UseBaseTimeOffsets && m_includeTime)
{
m_baseTimeRotationTimer = new Timer();
m_baseTimeRotationTimer.Interval = m_useMillisecondResolution ? 60000 : 420000;
m_baseTimeRotationTimer.AutoReset = true;
m_baseTimeRotationTimer.Elapsed += BaseTimeRotationTimer_Elapsed;
}
m_bufferBlockRetransmissionTimer = new Timer();
m_bufferBlockRetransmissionTimer.AutoReset = false;
m_bufferBlockRetransmissionTimer.Interval = m_bufferBlockRetransmissionTimeout * 1000.0D;
m_bufferBlockRetransmissionTimer.Elapsed += BufferBlockRetransmissionTimer_Elapsed;
// Handle temporal session initialization
if (this.TemporalConstraintIsDefined())
m_iaonSession = this.CreateTemporalSession();
}
