/// <summary>
/// Performs actions before polling the specified device.
/// </summary>
public override void BeforeSession(DeviceLogic deviceLogic)
{
currentConn = deviceLogic.Connection as TcpConnection;
if (currentConn != null)
{
if (Behavior == ChannelBehavior.Slave)
{
Monitor.Enter(currentConn.SyncRoot);
}
// connect if disconnected
if (!currentConn.Connected)
{
// get host and port
string host;
int port;
if (currentConn == sharedConn)
{
host = options.Host;
port = options.TcpPort;
}
else if (currentConn.RemotePort > 0)
{
host = currentConn.RemoteAddress;
port = currentConn.RemotePort;
}
else
{
ScadaUtils.RetrieveHostAndPort(deviceLogic.StrAddress, options.TcpPort, out host, out port);
}
// connect
Log.WriteLine();
Log.WriteAction(Locale.IsRussian ?
"Соединение с {0}:{1}" :
"Connect to {0}:{1}", host, port);
if (currentConn.NetStream != null) // connection was already open but broken
{
currentConn.Renew();
}
currentConn.Open(host, port);
}
}
}
/// <summary>
/// Builds the connection string.
/// </summary>
private static string BuildConnectionString(DbConnectionOptions options)
{
if (options == null)
{
return("");
}
ScadaUtils.RetrieveHostAndPort(options.Server, NpgsqlConnection.DefaultPort,
out string host, out int port);
return(new NpgsqlConnectionStringBuilder
{
Host = host,
Port = port,
Database = options.Database,
Username = options.Username,
Password = CommonPhrases.HiddenPassword
}
.ToString());
}
/// <summary>
/// Creates a database connection.
/// </summary>
public static NpgsqlConnection CreateDbConnection(DbConnectionOptions options)
{
string connectionString = options.ConnectionString;
if (string.IsNullOrEmpty(connectionString))
{
ScadaUtils.RetrieveHostAndPort(options.Server, NpgsqlConnection.DefaultPort,
out string host, out int port);
connectionString = new NpgsqlConnectionStringBuilder
{
Host = host,
Port = port,
Database = options.Database,
Username = options.Username,
Password = options.Password
}
.ToString();
}
return(new NpgsqlConnection(connectionString));
}
/// <summary>
/// Performs actions before polling the specified device.
/// </summary>
public override void BeforeSession(DeviceLogic deviceLogic)
{
if (Behavior == ChannelBehavior.Master)
{
// update host and port of the connection
if (string.IsNullOrEmpty(deviceLogic.StrAddress))
{
masterConn.RemoteAddress = options.RemoteIpAddress;
masterConn.RemotePort = options.RemoteUdpPort;
}
else
{
ScadaUtils.RetrieveHostAndPort(deviceLogic.StrAddress, options.RemoteUdpPort,
out string host, out int port);
masterConn.RemoteAddress = host;
masterConn.RemotePort = port;
}
}
else
{
Monitor.Enter(deviceLock);
}
}