/// <summary>
/// Initialization of the variable value in DB, this is used if the variable does not exist yet,
/// then one looks into the nodelist.
/// </summary>
/// <param name="name">name of the variable value to initialize</param>
/// <returns></returns>
private dbVariableValue _initVarValue(string name)
{
dbNode var_idx = nodes.FindOne(Query.EQ("name", name));
if (var_idx == null)
{
throw new Exception("variable does not exist: " + name);
}
else
{
dbVariableValue new_var = new dbVariableValue {
Id = var_idx.Id,
name = var_idx.name,
systemType = var_idx.systemType,
};
return(new_var);
}
}
/// <summary>
/// Update the cache with the new value of that variable
/// </summary>
/// <param name="name">name of variable</param>
/// <param name="value"> updated value of variable</param>
/// <param name="time"> timestamp of when it changed</param>
public void updateBuffer(string name, object value, DateTime time)
{
try{
dbVariableValue var_idx = latestValues.FindOne(Query.EQ("name", name));
// if not found then search in nodes list
if (var_idx == null)
{
var_idx = _initVarValue(name);
}
logger.Debug("value -> " + value.ToString() + " type --> " + var_idx.systemType);
var_idx.value = Convert.ChangeType(value, Type.GetType(var_idx.systemType));
var_idx.timestamp = time;
latestValues.Upsert(var_idx);
}
catch (Exception e) {
logger.Error(e, "Error in updating value for variable " + name);
Console.WriteLine(e.Message);
}
}
