/// <summary>
/// Receives the configuration database subset from Server.
/// </summary>
private bool ReceiveConfigBase(out ConfigBaseSubset configBase)
{
configBase = new ConfigBaseSubset();
if (ServerComm.ReceiveBaseTable("incnl.dat", configBase.InCnlTable) &&
ServerComm.ReceiveBaseTable("kp.dat", configBase.KPTable))
{
return(true);
}
else
{
configBase = null;
return(false);
}
}
/// <summary>
/// Принять таблицу входных каналов и таблицу КП от SCADA-Сервера
/// </summary>
private bool ReceiveBaseTables(out DataTable tblInCnl, out DataTable tblKP)
{
tblInCnl = new DataTable();
tblKP = new DataTable();
if (ServerComm.ReceiveBaseTable("incnl.dat", tblInCnl) &&
ServerComm.ReceiveBaseTable("kp.dat", tblKP))
{
return(true);
}
else
{
tblInCnl = null;
tblKP = null;
return(false);
}
}
/// <summary>
/// Обновить таблицы базы конфигурации, свойства каналов и статусов
/// </summary>
public void RefreshBaseTables()
{
lock (baseLock)
{
try
{
DateTime utcNowDT = DateTime.UtcNow;
if (utcNowDT - baseRefrDT > BaseValidSpan) // данные устарели
{
baseRefrDT = utcNowDT;
DateTime newBaseAge = serverComm.ReceiveFileAge(ServerComm.Dirs.BaseDAT,
BaseTables.GetFileName(BaseTables.InCnlTable));
if (newBaseAge == DateTime.MinValue) // база конфигурации не существует или нет связи с сервером
{
throw new ScadaException(Localization.UseRussian ?
"Не удалось принять время изменения базы конфигурации." :
"Unable to receive the configuration database modification time.");
}
else if (BaseTables.BaseAge != newBaseAge) // база конфигурации изменена
{
log.WriteAction(Localization.UseRussian ?
"Обновление таблиц базы конфигурации" :
"Refresh the tables of the configuration database");
// ожидание снятия возможной блокировки базы конфигурации
DateTime t0 = utcNowDT;
while (serverComm.ReceiveFileAge(ServerComm.Dirs.BaseDAT, "baselock") > DateTime.MinValue &&
DateTime.UtcNow - t0 <= WaitBaseLock)
{
Thread.Sleep(ScadaUtils.ThreadDelay);
}
// загрузка данных в таблицы
BaseTables newBaseTables = new BaseTables()
{
BaseAge = newBaseAge
};
foreach (DataTable dataTable in newBaseTables.AllTables)
{
string tableName = BaseTables.GetFileName(dataTable);
if (!serverComm.ReceiveBaseTable(tableName, dataTable))
{
throw new ScadaException(string.Format(Localization.UseRussian ?
"Не удалось принять таблицу {0}" :
"Unable to receive the table {0}", tableName));
}
}
BaseTables = newBaseTables;
// заполнение свойств каналов и статусов
lock (BaseTables.SyncRoot)
{
FillCnlProps();
FillCtrlCnlProps();
FillCnlStatProps();
}
}
}
}
catch (Exception ex)
{
BaseTables.BaseAge = DateTime.MinValue;
log.WriteException(ex, Localization.UseRussian ?
"Ошибка при обновлении таблиц базы конфигурации" :
"Error refreshing the tables of the configuration database");
}
}
}
/// <summary>
/// Update configuration database tables, channel properties and statuses
/// </summary>
public void RefreshBaseTables()
{
lock (baseLock) {
try {
var utcNowDT = DateTime.UtcNow;
if (utcNowDT - baseRefrDT > BaseValidSpan) // data is out of date
{
baseRefrDT = utcNowDT;
var newBaseAge = serverComm.ReceiveFileAge(ServerComm.Dirs.BaseDAT,
BaseTables.GetFileName(BaseTables.InCnlTable));
if (newBaseAge == DateTime.MinValue)
{
// configuration database does not exist or there is no connection to the server
throw new ScadaException("Unable to receive the configuration database modification time.");
}
if (BaseTables.BaseAge != newBaseAge) // configuration base changed
{
log.WriteAction("Refresh the tables of the configuration database");
// waiting for unlocking possible configuration base
var t0 = utcNowDT;
while (serverComm.ReceiveFileAge(ServerComm.Dirs.BaseDAT, "baselock") > DateTime.MinValue &&
DateTime.UtcNow - t0 <= WaitBaseLock)
{
Thread.Sleep(ScadaUtils.ThreadDelay);
}
// loading data into tables
var newBaseTables = new BaseTables()
{
BaseAge = newBaseAge
};
foreach (var dataTable in newBaseTables.AllTables)
{
string tableName = BaseTables.GetFileName(dataTable);
if (!serverComm.ReceiveBaseTable(tableName, dataTable))
{
throw new ScadaException($"Unable to receive the table {tableName}");
}
}
BaseTables = newBaseTables;
// filling channel properties and statuses
lock (BaseTables.SyncRoot) {
FillCnlProps();
FillCtrlCnlProps();
FillCnlStatProps();
}
}
}
} catch (Exception ex) {
BaseTables.BaseAge = DateTime.MinValue;
log.WriteException(ex, "Error refreshing the tables of the configuration database");
}
}
}