public ViewableActivationResult Activate(
AgentInstanceContext agentInstanceContext,
bool isSubselect,
bool isRecoveringResilient)
{
var consumerDesc = new NamedWindowConsumerDesc(
_filterExpressions, _optPropertyEvaluator, agentInstanceContext);
var consumerView = _processor.AddConsumer(consumerDesc, isSubselect);
return(new ViewableActivationResult(consumerView, consumerView.Stop, null, null, null, false, false, null));
}
public override NamedWindowConsumerView AddConsumerNoContext(NamedWindowConsumerDesc consumerDesc)
{
NamedWindowConsumerCallback consumerCallback = new ProxyNamedWindowConsumerCallback() {
ProcGetEnumerator = () => throw new UnsupportedOperationException(
"Iterator not supported on named windows that have a context attached and when that context is not the same as the consuming statement's context"),
ProcIsParentBatchWindow = () => isParentBatchWindow,
ProcSnapshot = (
queryGraph,
annotations) => Collections.GetEmptyList<EventBean>(),
ProcStopped = RemoveConsumerNoContext,
};
// Construct consumer view, allow a callback to this view to remove the consumer
bool audit = AuditEnum.STREAM.GetAudit(consumerDesc.AgentInstanceContext.StatementContext.Annotations) !=
null;
NamedWindowConsumerView consumerView = new NamedWindowConsumerView(
consumerDesc.NamedWindowConsumerId,
consumerDesc.FilterEvaluator,
consumerDesc.OptPropertyEvaluator,
eventType,
consumerCallback,
consumerDesc.AgentInstanceContext,
audit);
// Keep a list of consumer views per statement to accomodate joins and subqueries
IList<NamedWindowConsumerView> viewsPerStatements =
consumersNonContext.Get(consumerDesc.AgentInstanceContext.EpStatementAgentInstanceHandle);
if (viewsPerStatements == null) {
viewsPerStatements = new CopyOnWriteList<NamedWindowConsumerView>();
// avoid concurrent modification as a thread may currently iterate over consumers as its dispatching
// without the runtime lock
IDictionary<EPStatementAgentInstanceHandle, IList<NamedWindowConsumerView>> newConsumers =
NamedWindowUtil.CreateConsumerMap(isPrioritized);
newConsumers.PutAll(consumersNonContext);
newConsumers.Put(consumerDesc.AgentInstanceContext.EpStatementAgentInstanceHandle, viewsPerStatements);
consumersNonContext = newConsumers;
}
viewsPerStatements.Add(consumerView);
return consumerView;
}
public abstract NamedWindowConsumerView AddConsumerNoContext(NamedWindowConsumerDesc consumerDesc);
public NamedWindowConsumerView AddConsumer(
NamedWindowConsumerDesc consumerDesc,
bool isSubselect)
{
NamedWindowConsumerCallback consumerCallback = new ProxyNamedWindowConsumerCallback {
ProcGetEnumerator = () => {
var instance = _namedWindow.GetNamedWindowInstance(AgentInstanceContext);
if (instance == null) {
// this can happen on context-partition "output when terminated"
return GetEnumerator();
}
return instance.TailViewInstance.GetEnumerator();
},
ProcStopped = namedWindowConsumerView
=> RemoveConsumer(namedWindowConsumerView),
ProcIsParentBatchWindow = ()
=> _rootViewInstance.IsParentBatchWindow,
ProcSnapshot = (
queryGraph,
annotations)
=> Snapshot(queryGraph, annotations)
};
// Construct consumer view, allow a callback to this view to remove the consumer
var audit = AuditEnum.STREAM.GetAudit(consumerDesc.AgentInstanceContext.StatementContext.Annotations) !=
null;
var consumerView = new NamedWindowConsumerView(
consumerDesc.NamedWindowConsumerId,
consumerDesc.FilterEvaluator,
consumerDesc.OptPropertyEvaluator,
TailView.EventType,
consumerCallback,
consumerDesc.AgentInstanceContext,
audit);
// indicate to virtual data window that a consumer was added
var virtualDWView = _rootViewInstance.VirtualDataWindow;
virtualDWView?.VirtualDataWindow.HandleEvent(
new VirtualDataWindowEventConsumerAdd(
TailView.EventType.Name,
consumerView,
consumerDesc.AgentInstanceContext.StatementName,
consumerDesc.AgentInstanceContext.AgentInstanceId,
consumerDesc.FilterEvaluator,
AgentInstanceContext));
// Keep a list of consumer views per statement to accommodate joins and subqueries
var viewsPerStatements =
_consumersInContext.Get(consumerDesc.AgentInstanceContext.EpStatementAgentInstanceHandle);
if (viewsPerStatements == null) {
viewsPerStatements = new CopyOnWriteList<NamedWindowConsumerView>();
// avoid concurrent modification as a thread may currently iterate over consumers as its dispatching
// without the runtime lock
var newConsumers = NamedWindowUtil.CreateConsumerMap(TailView.IsPrioritized);
newConsumers.PutAll(_consumersInContext);
newConsumers.Put(consumerDesc.AgentInstanceContext.EpStatementAgentInstanceHandle, viewsPerStatements);
_consumersInContext = newConsumers;
}
if (isSubselect) {
viewsPerStatements.Insert(0, consumerView);
}
else {
viewsPerStatements.Add(consumerView);
}
return consumerView;
}
