public WindowsServiceClient(string connectionString)
{
// Initialize status cache members.
string statusBufferSize;
if (connectionString.ParseKeyValuePairs().TryGetValue("statusBufferSize", out statusBufferSize))
m_statusBufferSize = int.Parse(statusBufferSize);
else
m_statusBufferSize = 8192;
m_cachedStatus = string.Empty;
// Initialize remoting client socket.
m_remotingClient = new TcpClient();
m_remotingClient.ConnectionString = connectionString;
m_remotingClient.SharedSecret = "openPDC";
m_remotingClient.Handshake = true;
m_remotingClient.PayloadAware = true;
m_remotingClient.MaxConnectionAttempts = -1;
// Initialize windows service client.
m_clientHelper = new ClientHelper();
m_clientHelper.RemotingClient = m_remotingClient;
m_clientHelper.ReceivedServiceUpdate += ClientHelper_ReceivedServiceUpdate;
}
/// <summary>
/// Creates an instance of <see cref="WindowsServiceClient"/>.
/// </summary>
/// <param name="connectionString">Connection information such as server ip address and port where windows service is running.</param>
public WindowsServiceClient(string connectionString)
{
// Initialize status cache members.
Dictionary<string, string> settings = connectionString.ParseKeyValuePairs();
string setting;
if (settings.TryGetValue("statusBufferSize", out setting) && !string.IsNullOrWhiteSpace(setting))
m_statusBufferSize = int.Parse(setting);
else
m_statusBufferSize = 8192;
m_cachedStatus = string.Empty;
// Initialize remoting client socket.
m_remotingClient = new TcpClient();
m_remotingClient.ConnectionString = connectionString;
// See if user wants to connect to remote service using integrated security
if (settings.TryGetValue("integratedSecurity", out setting) && !string.IsNullOrWhiteSpace(setting))
m_remotingClient.IntegratedSecurity = setting.ParseBoolean();
m_remotingClient.PayloadAware = true;
m_remotingClient.MaxConnectionAttempts = -1;
// Initialize windows service client.
m_clientHelper = new ClientHelper();
m_clientHelper.RemotingClient = m_remotingClient;
m_clientHelper.ReceivedServiceUpdate += ClientHelper_ReceivedServiceUpdate;
}
/// <summary>
/// Create a communications client
/// </summary>
/// <remarks>
/// Note that typical connection string should be prefixed with a "protocol=tcp", "protocol=udp", "protocol=serial" or "protocol=file"
/// </remarks>
/// <returns>A communications client.</returns>
/// <param name="connectionString">Connection string for the client.</param>
public static IClient Create(string connectionString)
{
Dictionary<string, string> connectionData = connectionString.ParseKeyValuePairs();
IClient client = null;
string protocol;
if (connectionData.TryGetValue("protocol", out protocol))
{
connectionData.Remove("protocol");
StringBuilder settings = new StringBuilder();
foreach (string key in connectionData.Keys)
{
settings.Append(key);
settings.Append("=");
settings.Append(connectionData[key]);
settings.Append(";");
}
switch (protocol.ToLower())
{
case "tcp":
client = new TcpClient(settings.ToString());
break;
case "udp":
client = new UdpClient(settings.ToString());
break;
case "file":
client = new FileClient(settings.ToString());
break;
case "serial":
client = new SerialClient(settings.ToString());
break;
default:
throw new ArgumentException(protocol + " is not a valid transport protocol.");
}
}
else
{
throw new ArgumentException("Transport protocol must be specified.");
}
return client;
}
/// <summary>
/// Initializes <see cref="DataSubscriber"/>.
/// </summary>
public override void Initialize()
{
base.Initialize();
Dictionary<string, string> settings = Settings;
string setting;
double interval;
// Setup connection to data publishing server with or without authentication required
if (settings.TryGetValue("requireAuthentication", out setting))
m_requireAuthentication = setting.ParseBoolean();
else
m_requireAuthentication = false;
if (m_requireAuthentication)
{
if (!settings.TryGetValue("sharedSecret", out m_sharedSecret) && !string.IsNullOrWhiteSpace(m_sharedSecret))
throw new ArgumentException("The \"sharedSecret\" setting must defined when authentication is required.");
if (!settings.TryGetValue("authenticationID", out m_authenticationID) && !string.IsNullOrWhiteSpace(m_authenticationID))
throw new ArgumentException("The \"authenticationID\" setting must defined when authentication is required.");
}
// Check if synchronize metadata is disabled.
if (settings.TryGetValue("synchronizeMetadata", out setting))
m_synchronizeMetadata = setting.ParseBoolean();
else
m_synchronizeMetadata = true; // by default, we will always perform this.
// Check if measurements for this connection should be marked as "internal" - i.e., owned and allowed for proxy
if (settings.TryGetValue("internal", out setting))
m_internal = setting.ParseBoolean();
// See if user has opted for different operational modes
if (!(settings.TryGetValue("operationalModes", out setting) && Enum.TryParse(setting, true, out m_operationalModes)))
m_operationalModes = DefaultOperationalModes;
// Check if we should be using the alternate binary format for communications with the publisher
if (settings.TryGetValue("operationalModes", out setting))
m_operationalModes = (OperationalModes)uint.Parse(setting);
// Check if user wants to request that publisher use millisecond resolution to conserve bandwidth
if (settings.TryGetValue("useMillisecondResolution", out setting))
m_useMillisecondResolution = setting.ParseBoolean();
// Define auto connect setting
if (settings.TryGetValue("autoConnect", out setting))
m_autoConnect = setting.ParseBoolean();
// Define data loss interval
if (settings.TryGetValue("dataLossInterval", out setting) && double.TryParse(setting, out interval))
DataLossInterval = interval;
if (m_autoConnect)
{
// Connect to local events when automatically engaging connection cycle
ConnectionAuthenticated += DataSubscriber_ConnectionAuthenticated;
MetaDataReceived += DataSubscriber_MetaDataReceived;
// If active measurements are defined, attempt to defined desired subscription points from there
if (DataSource != null && (object)DataSource.Tables != null && DataSource.Tables.Contains("ActiveMeasurements"))
{
try
{
// Filter to points associated with this subscriber that have been requested for subscription, are enabled and not owned locally
DataRow[] filteredRows = DataSource.Tables["ActiveMeasurements"].Select("Subscribed <> 0");
List<IMeasurement> subscribedMeasurements = new List<IMeasurement>();
MeasurementKey key;
Guid signalID;
foreach (DataRow row in filteredRows)
{
// Create a new measurement for the provided field level information
Measurement measurement = new Measurement();
// Parse primary measurement identifier
signalID = row["SignalID"].ToNonNullString(Guid.Empty.ToString()).ConvertToType<Guid>();
// Set measurement key if defined
if (MeasurementKey.TryParse(row["ID"].ToString(), signalID, out key))
measurement.Key = key;
// Assign other attributes
measurement.ID = signalID;
measurement.TagName = row["PointTag"].ToNonNullString();
measurement.Multiplier = double.Parse(row["Multiplier"].ToString());
measurement.Adder = double.Parse(row["Adder"].ToString());
subscribedMeasurements.Add(measurement);
}
if (subscribedMeasurements.Count > 0)
{
// Combine subscribed output measurement with any existing output measurement and return unique set
if (OutputMeasurements == null)
OutputMeasurements = subscribedMeasurements.ToArray();
else
OutputMeasurements = subscribedMeasurements.Concat(OutputMeasurements).Distinct().ToArray();
}
}
catch (Exception ex)
{
// Errors here may not be catastrophic, this simply limits the auto-assignment of input measurement keys desired for subscription
OnProcessException(new InvalidOperationException(string.Format("Failed to define subscribed measurements: {0}", ex.Message), ex));
}
}
}
// Create a new TCP client
TcpClient commandChannel = new TcpClient();
// Initialize default settings
commandChannel.ConnectionString = "server=localhost:6165";
commandChannel.PayloadAware = true;
commandChannel.PersistSettings = false;
commandChannel.MaxConnectionAttempts = 1;
// Assign command channel client reference and attach to needed events
this.CommandChannel = commandChannel;
// Get proper connection string - either from specified command channel
// or from base connection string
if (settings.TryGetValue("commandChannel", out setting))
commandChannel.ConnectionString = setting;
else
commandChannel.ConnectionString = ConnectionString;
// Register subscriber with the statistics engine
StatisticsEngine.Register(this, "Subscriber", "SUB");
Initialized = true;
}
/// <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();
}
}
finally
{
m_disposed = true; // Prevent duplicate dispose.
base.Dispose(disposing); // Call base class Dispose().
}
}
}
/// <summary>
/// Releases the unmanaged resources used by the <see cref="WindowsServiceClient"/> 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
{
if (disposing)
{
if (m_clientHelper != null)
m_clientHelper.ReceivedServiceUpdate -= ClientHelper_ReceivedServiceUpdate;
m_clientHelper = null;
if (m_remotingClient != null)
{
m_remotingClient.MaxConnectionAttempts = 0;
if (m_remotingClient.CurrentState == ClientState.Connected)
m_remotingClient.Disconnect();
m_remotingClient.Dispose();
}
m_remotingClient = null;
}
}
finally
{
m_disposed = true; // Prevent duplicate dispose.
}
}
}
/// <summary>
/// Create a communications client
/// </summary>
/// <remarks>
/// Note that typical connection string should be prefixed with a "protocol=tcp", "protocol=udp", "protocol=serial" or "protocol=file"
/// </remarks>
/// <returns>A communications client.</returns>
/// <param name="connectionString">Connection string for the client.</param>
public static IClient Create(string connectionString)
{
Dictionary<string, string> connectionSettings = connectionString.ParseKeyValuePairs();
IClient client = null;
string protocol;
if (connectionSettings.TryGetValue("protocol", out protocol))
{
connectionSettings.Remove("protocol");
StringBuilder settings = new StringBuilder();
foreach (string key in connectionSettings.Keys)
{
settings.Append(key);
settings.Append("=");
settings.Append(connectionSettings[key]);
settings.Append(";");
}
// Create a client instance for the specified protocol.
switch (protocol.ToLower())
{
case "tcp":
client = new TcpClient(settings.ToString());
break;
case "udp":
client = new UdpClient(settings.ToString());
break;
case "file":
client = new FileClient(settings.ToString());
break;
case "serial":
client = new SerialClient(settings.ToString());
break;
default:
throw new ArgumentException(protocol + " is not a valid transport protocol");
}
// Apply client settings from the connection string to the client.
foreach (KeyValuePair<string, string> setting in connectionSettings)
{
PropertyInfo property = client.GetType().GetProperty(setting.Key);
if (property != null)
property.SetValue(client, Convert.ChangeType(setting.Value, property.PropertyType), null);
}
}
else
{
throw new ArgumentException("Transport protocol must be specified");
}
return client;
}
/// <summary>
/// Initializes a new instance of the <see cref="DataListener"/> class.
/// </summary>
public DataListener()
: base()
{
m_id = DefaultID;
m_server = DefaultServer;
m_port = DefaultPort;
m_protocol = DefaultProtocol;
m_connectToServer = DefaultConnectToServer;
m_initializeData = DefaultInitializeData;
m_initializeDataTimeout = DefaultInitializeDataTimeout;
m_persistSettings = DefaultPersistSettings;
m_settingsCategory = DefaultSettingsCategory;
m_data = new List<IDataPoint>();
m_initializeWaitHandle = new AutoResetEvent(false);
m_parser = new PacketParser();
m_parser.DataParsed += PacketParser_DataParsed;
m_tcpClient = new TcpClient();
m_tcpClient.ConnectionAttempt += ClientSocket_ConnectionAttempt;
m_tcpClient.ConnectionEstablished += ClientSocket_ConnectionEstablished;
m_tcpClient.ConnectionTerminated += ClientSocket_ConnectionTerminated;
m_tcpClient.ReceiveDataComplete += ClientSocket_ReceiveDataComplete;
m_udpClient = new UdpClient();
m_udpClient.ConnectionAttempt += ClientSocket_ConnectionAttempt;
m_udpClient.ConnectionEstablished += ClientSocket_ConnectionEstablished;
m_udpClient.ConnectionTerminated += ClientSocket_ConnectionTerminated;
m_udpClient.ReceiveDataComplete += ClientSocket_ReceiveDataComplete;
m_tcpServer = new TcpServer();
m_tcpServer.ServerStarted += ServerSocket_ServerStarted;
m_tcpServer.ServerStopped += ServerSocket_ServerStopped;
m_tcpServer.ReceiveClientDataComplete += ServerSocket_ReceiveClientDataComplete;
m_dataInitClient = new TcpClient();
m_dataInitClient.ConnectionString = "Server={0}:1003";
m_dataInitClient.PayloadAware = true;
m_dataInitClient.MaxConnectionAttempts = 10;
m_dataInitClient.ReceiveDataComplete += DataInitClient_ReceiveDataComplete;
}
private void ServiceHelper_ServiceStarted(object sender, EventArgs e)
{
// Initialize config.
ConfigurationFile config = ConfigurationFile.Current;
CategorizedSettingsElementCollection settings = config.Settings["SystemSettings"];
// Connect to source.
m_source = new TcpClient();
m_source.ConnectionString = string.Format("Server={0}", settings["Source"].Value);
m_source.ConnectionAttempt += SourceClient_ConnectionAttempt;
m_source.ConnectionEstablished += SourceClient_ConnectionEstablished;
m_source.ConnectionTerminated += SourceClient_ConnectionTerminated;
m_source.ReceiveDataComplete += SourceClient_ReceiveDataComplete;
m_source.ConnectAsync();
m_serviceHelper.ServiceComponents.Add(m_source);
// Connect to target.
m_targets = new List<TcpClient>();
foreach (string item in settings["Target"].Value.Replace(',', ';').Split(';'))
{
TcpClient target = new TcpClient();
target.ConnectionString = string.Format("Server={0}", item.Trim());
target.ConnectionAttempt += TargetClient_ConnectionAttempt;
target.ConnectionEstablished += TargetClient_ConnectionEstablished;
target.ConnectionTerminated += TargetClient_ConnectionTerminated;
target.ReceiveDataException += TargetClient_ReceiveDataException;
target.ConnectAsync();
m_serviceHelper.ServiceComponents.Add(target);
}
}
