private void OpenSocket(object state)
{
int connectionAttempts = 0;
while (MaxConnectionAttempts == -1 || connectionAttempts < MaxConnectionAttempts)
{
if ((object)m_zeroMQClient.Provider != null)
{
// Disconnect any existing ZeroMQ socket
try
{
m_zeroMQClient.Provider.Disconnect(ServerUri);
}
catch (Exception ex)
{
OnDisconnectException(ex);
}
m_zeroMQClient.Reset();
}
try
{
OnConnectionAttempt();
// Create ZeroMQ Dealer socket - closest match to IClient implementation
m_zeroMQClient.Provider = new ZSocket(ZContext.Create(), ZSocketType.DEALER);
m_zeroMQClient.Provider.Identity = m_zeroMQClient.ID.ToByteArray();
m_zeroMQClient.Provider.SendHighWatermark = m_maxSendQueueSize;
m_zeroMQClient.Provider.ReceiveHighWatermark = m_maxReceiveQueueSize;
m_zeroMQClient.Provider.Immediate = true;
m_zeroMQClient.Provider.SetOption(ZSocketOption.LINGER, 0);
m_zeroMQClient.Provider.SetOption(ZSocketOption.SNDTIMEO, 1000);
m_zeroMQClient.Provider.SetOption(ZSocketOption.RCVTIMEO, -1);
m_zeroMQClient.Provider.SetOption(ZSocketOption.RECONNECT_IVL, -1);
m_zeroMQClient.Provider.IPv6 = (Transport.GetDefaultIPStack() == IPStack.IPv6);
m_zeroMQClient.Provider.Connect(ServerUri);
m_connectionHandle.Set();
connectionAttempts = 0;
OnConnectionEstablished();
}
catch (Exception ex)
{
m_zeroMQClient.Provider = null;
// Log exception during connection attempt
OnConnectionException(ex);
// Keep retrying connection
Thread.Sleep(1000);
connectionAttempts++;
continue;
}
try
{
// Start data reception loop
ReceiveDataHandler();
}
catch (Exception ex)
{
// Notify of the exception.
OnReceiveDataException(ex);
}
// If client is no longer connected, exit loop, else sleep for a moment before attempting reconnect
if (Enabled)
{
Thread.Sleep(1000);
}
else
{
break;
}
}
}
/// <summary>
/// Validates the specified <paramref name="connectionString"/>.
/// </summary>
/// <param name="connectionString">Connection string to be validated.</param>
/// <exception cref="ArgumentException">Server property is missing.</exception>
/// <exception cref="FormatException">Server property is invalid.</exception>
/// <exception cref="ArgumentOutOfRangeException">Server port value is not between <see cref="Transport.PortRangeLow"/> and <see cref="Transport.PortRangeHigh"/>.</exception>
protected override void ValidateConnectionString(string connectionString)
{
m_connectData = connectionString.ParseKeyValuePairs();
// Make sure "interface" setting exists
Transport.GetInterfaceIPStack(m_connectData);
// Check if 'server' property is missing.
if (!m_connectData.ContainsKey("server"))
{
throw new ArgumentException(string.Format("Server property is missing (Example: {0})", DefaultConnectionString));
}
// Backwards compatibility adjustments.
// New Format: Server=localhost:8888
// Old Format: Server=localhost; Port=8888
if (m_connectData.ContainsKey("port"))
{
m_connectData["server"] = string.Format("{0}:{1}", m_connectData["server"], m_connectData["port"]);
}
// For traditional style connection strings, also support a "zeroMQTransportProtocol" setting
if (m_connectData.ContainsKey("zeroMQTransportProtocol"))
{
ZeroMQTransportProtocol protocol;
if (Enum.TryParse(m_connectData["zeroMQTransportProtocol"].Trim(), true, out protocol))
{
m_zeroMQTransportProtocol = protocol;
}
}
// Validate ZeroMQ connection string
Match endpointMatch = Regex.Match(m_connectData["server"], ZeroMQServer.EndpointFormatRegex);
string port = null;
bool validConnectionString = false;
if (endpointMatch.Success)
{
if (!Enum.TryParse(endpointMatch.Groups["protocol"].Value.Trim(), true, out m_zeroMQTransportProtocol))
{
m_zeroMQTransportProtocol = ZeroMQTransportProtocol.Tcp;
}
port = endpointMatch.Groups["port"].Value.Trim();
validConnectionString = true;
if (!string.IsNullOrWhiteSpace(m_connectData["interface"]) && (m_zeroMQTransportProtocol == ZeroMQTransportProtocol.Pgm || m_zeroMQTransportProtocol == ZeroMQTransportProtocol.Epgm))
{
m_connectData["server"] = string.Format("{0}://{1};{2}:{3}", m_zeroMQTransportProtocol.ToString().ToLowerInvariant(), m_connectData["interface"], endpointMatch.Groups["host"].Value.Trim(), port);
}
}
else
{
// Support traditional IClient "server" property
endpointMatch = Regex.Match(m_connectData["server"], Transport.EndpointFormatRegex);
if (endpointMatch.Success)
{
m_connectData["server"] = string.Format("{0}://{1}", m_zeroMQTransportProtocol.ToString().ToLowerInvariant(), m_connectData["server"]);
port = endpointMatch.Groups["port"].Value.Trim();
validConnectionString = true;
if (!string.IsNullOrWhiteSpace(m_connectData["interface"]) && (m_zeroMQTransportProtocol == ZeroMQTransportProtocol.Pgm || m_zeroMQTransportProtocol == ZeroMQTransportProtocol.Epgm))
{
m_connectData["server"] = string.Format("{0}://{1};{2}:{3}", m_zeroMQTransportProtocol.ToString().ToLowerInvariant(), m_connectData["interface"], endpointMatch.Groups["host"].Value.Trim(), port);
}
}
}
if (!validConnectionString)
{
throw new FormatException(string.Format("Server property is invalid (Example: {0})", DefaultConnectionString));
}
if (m_zeroMQTransportProtocol != ZeroMQTransportProtocol.InProc && !Transport.IsPortNumberValid(port))
{
throw new ArgumentOutOfRangeException("connectionString", string.Format("Server port must between {0} and {1}", Transport.PortRangeLow, Transport.PortRangeHigh));
}
}
/// <summary>
/// Validates the specified <paramref name="configurationString"/>.
/// </summary>
/// <param name="configurationString">Configuration string to be validated.</param>
/// <exception cref="ArgumentException">Port property is missing.</exception>
/// <exception cref="ArgumentOutOfRangeException">Port property value is not between <see cref="Transport.PortRangeLow"/> and <see cref="Transport.PortRangeHigh"/>.</exception>
protected override void ValidateConfigurationString(string configurationString)
{
m_configData = configurationString.ParseKeyValuePairs();
// Check for "server" property, this is the preferred configuration for ZeroMQServer
if (m_configData.ContainsKey("server"))
{
// Validate ZeroMQ configuration string
Match endpointMatch = Regex.Match(m_configData["server"], EndpointFormatRegex);
string port = null;
bool validConfigurationString = false;
if (endpointMatch.Success)
{
if (!Enum.TryParse(endpointMatch.Groups["protocol"].Value.Trim(), true, out m_zeroMQTransportProtocol))
{
m_zeroMQTransportProtocol = ZeroMQTransportProtocol.Tcp;
}
m_configData["interface"] = endpointMatch.Groups["host"].Value.Trim();
port = endpointMatch.Groups["port"].Value.Trim();
validConfigurationString = true;
}
else
{
// Support traditional IClient "server" property
endpointMatch = Regex.Match(m_configData["server"], Transport.EndpointFormatRegex);
if (endpointMatch.Success)
{
m_configData["server"] = $"{m_zeroMQTransportProtocol.ToString().ToLowerInvariant()}://{m_configData["server"]}";
m_configData["interface"] = endpointMatch.Groups["host"].Value.Trim();
port = endpointMatch.Groups["port"].Value.Trim();
validConfigurationString = true;
}
}
if (!validConfigurationString)
{
throw new FormatException($"Server property is invalid (Example: {DefaultConfigurationString})");
}
if (m_zeroMQTransportProtocol != ZeroMQTransportProtocol.InProc && !Transport.IsPortNumberValid(port))
{
throw new ArgumentOutOfRangeException(nameof(configurationString), $"Port number must be between {Transport.PortRangeLow} and {Transport.PortRangeHigh}");
}
}
else
{
// Fall back on traditional server configuration strings
Transport.GetInterfaceIPStack(m_configData);
if (string.IsNullOrWhiteSpace(m_configData["interface"]) || m_configData["interface"].Equals("0.0.0.0", StringComparison.Ordinal))
{
m_configData["interface"] = "*";
}
// For traditional style connection strings, also support a "zeroMQTransportProtocol" setting
if (m_configData.ContainsKey("zeroMQTransportProtocol"))
{
ZeroMQTransportProtocol protocol;
if (Enum.TryParse(m_configData["zeroMQTransportProtocol"].Trim(), true, out protocol))
{
m_zeroMQTransportProtocol = protocol;
}
}
// For traditional IServer connection strings, a "port" property is expected
if (m_configData.ContainsKey("port") && m_zeroMQTransportProtocol != ZeroMQTransportProtocol.InProc)
{
m_configData["server"] = $"{m_zeroMQTransportProtocol.ToString().ToLowerInvariant()}://{m_configData["interface"]}:{m_configData["port"]}";
}
else
{
throw new FormatException($"Server property is invalid (Example: {DefaultConfigurationString})");
}
}
}