private void PopulateBuiltinProperties()
{
OutputConditionExpressionTypeUtil.Populate(
_builtinProperties.Properties,
_totalNewEventsCount,
_totalOldEventsCount,
_totalNewEventsSum,
_totalOldEventsSum,
_lastOutputTimestamp);
}
/// <summary>
/// Ctor.
/// </summary>
/// <param name="whenExpressionNode">the expression to evaluate, returning true when to output</param>
/// <param name="assignments">is the optional then-clause variable assignments, or null or empty if none</param>
/// <param name="agentInstanceContext">The agent instance context.</param>
/// <throws><seealso cref="ExprValidationException" /> when validation fails</throws>
public OutputConditionPolledExpression(ExprNode whenExpressionNode, IList <OnTriggerSetAssignment> assignments, AgentInstanceContext agentInstanceContext)
{
_whenExpressionNode = whenExpressionNode.ExprEvaluator;
_agentInstanceContext = agentInstanceContext;
_eventsPerStream = new EventBean[1];
// determine if using properties
var containsBuiltinProperties = false;
if (ContainsBuiltinProperties(whenExpressionNode))
{
containsBuiltinProperties = true;
}
else
{
if (assignments != null)
{
foreach (OnTriggerSetAssignment assignment in assignments)
{
if (ContainsBuiltinProperties(assignment.Expression))
{
containsBuiltinProperties = true;
}
}
}
}
if (containsBuiltinProperties)
{
EventType oatype = agentInstanceContext.StatementContext.EventAdapterService.CreateAnonymousObjectArrayType(
typeof(OutputConditionPolledExpression).FullName, OutputConditionExpressionTypeUtil.TYPEINFO);
_builtinProperties = new ObjectArrayEventBean(OutputConditionExpressionTypeUtil.GetOAPrototype(), oatype);
_lastOutputTimestamp = agentInstanceContext.StatementContext.SchedulingService.Time;
}
if (assignments != null)
{
_variableReadWritePackage = new VariableReadWritePackage(assignments, agentInstanceContext.StatementContext.VariableService, agentInstanceContext.StatementContext.EventAdapterService);
}
else
{
_variableReadWritePackage = null;
}
}
public OutputConditionExpression(
OutputCallback outputCallback,
AgentInstanceContext agentInstanceContext,
OutputConditionExpressionFactory parent,
bool isStartConditionOnCreation)
: base(outputCallback)
{
_agentInstanceContext = agentInstanceContext;
_parent = parent;
_scheduleSlot = agentInstanceContext.StatementContext.ScheduleBucket.AllocateSlot();
_eventsPerStream = new EventBean[1];
if (parent.BuiltinPropertiesEventType != null)
{
_builtinProperties = new ObjectArrayEventBean(
OutputConditionExpressionTypeUtil.GetOAPrototype(), parent.BuiltinPropertiesEventType);
_lastOutputTimestamp = agentInstanceContext.StatementContext.SchedulingService.Time;
}
if (parent.VariableNames != null)
{
// if using variables, register a callback on the change of the variable
foreach (String variableName in parent.VariableNames)
{
var theVariableName = variableName;
agentInstanceContext.StatementContext.VariableService.RegisterCallback(
variableName, agentInstanceContext.AgentInstanceId, Update);
agentInstanceContext.AddTerminationCallback(
() => _agentInstanceContext.StatementContext.VariableService.UnregisterCallback(
theVariableName, agentInstanceContext.AgentInstanceId, Update));
}
}
if (isStartConditionOnCreation)
{
Update(0, 0);
}
}
