/// <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>
/// <param name="status"> Status of variable, default to good </param>
public void updateBuffer(string name, object value, DateTime time, uint status)
{
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("Request for Variable {0} to update.", name);
if (value != null)
{
logger.Debug("\t Value: {0} ", value.ToString());
}
logger.Debug("\t Status: {0} ", new StatusCode(status).ToString());
if (value != null)
{
var_idx.value = Convert.ChangeType(value, Type.GetType(var_idx.systemType));
}
// else var_idx.value = null;
var_idx.timestamp = time;
var_idx.statuscode = status;
latestValues.Upsert(var_idx);
}
catch (Exception e)
{
logger.Error("Error in updating value for variable " + name);
logger.Error(e.Message);
}
}
public ReadVarResponse(dbVariableValue v) : base()
{
Id = v.Id;
name = v.name;
value = v.value;
systemType = v.systemType;
timestamp = v.timestamp;
success = StatusCode.IsGood(v.statuscode);
statusCode = new StatusCode(v.statuscode);
}
/// <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);
}
}