/// <summary>
/// Returns the number of milliseconds.
/// </summary>
public long GetScheduleForwardDelta(long fromTime, AgentInstanceContext agentInstanceContext)
{
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().QRegIntervalValue(TimePeriodExpr);
}
if (_timeDeltaComputation == null)
{
_timeDeltaComputation = TimePeriodExpr.ConstEvaluator(new ExprEvaluatorContextStatement(agentInstanceContext.StatementContext, false));
}
long result = _timeDeltaComputation.DeltaMillisecondsAdd(fromTime);
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().ARegIntervalValue(result);
}
return(result);
}
public static ExprTimePeriodEvalDeltaConst ValidateAndEvaluateTimeDelta(String viewName,
StatementContext statementContext,
ExprNode expression,
String expectedMessage,
int expressionNumber)
{
StreamTypeService streamTypeService = new StreamTypeServiceImpl(statementContext.EngineURI, false);
ExprTimePeriodEvalDeltaConst timeDelta;
if (expression is ExprTimePeriod)
{
ExprTimePeriod validated = (ExprTimePeriod)ViewFactorySupport.ValidateExpr(viewName, statementContext, expression, streamTypeService, expressionNumber);
timeDelta = validated.ConstEvaluator(new ExprEvaluatorContextStatement(statementContext, false));
}
else
{
var result = ViewFactorySupport.ValidateAndEvaluateExpr(viewName, statementContext, expression, streamTypeService, expressionNumber);
if (!result.IsNumber())
{
throw new ViewParameterException(expectedMessage);
}
long millisecondsBeforeExpiry;
if (TypeHelper.IsFloatingPointNumber(result))
{
millisecondsBeforeExpiry = (long)Math.Round(1000d * result.AsDouble());
}
else
{
millisecondsBeforeExpiry = 1000 * result.AsLong();
}
timeDelta = new ExprTimePeriodEvalDeltaConstMsec(millisecondsBeforeExpiry);
}
if (timeDelta.DeltaMillisecondsAdd(0) < 1)
{
throw new ViewParameterException(viewName + " view requires a size of at least 1 msec");
}
return(timeDelta);
}