public void TestMakeSubviews()
{
EventStream eventStream = new SupportStreamImpl(typeof(SupportMarketDataBean), 4);
var expressions = SupportExprNodeFactory.MakeIdentNodesMD("Symbol");
GroupByView groupView = new GroupByViewImpl(_agentInstanceContext, expressions, ExprNodeUtility.GetEvaluators(expressions));
eventStream.AddView(groupView);
var groupByValue = new Object[] { "IBM" };
// Invalid for no child nodes
try
{
GroupByViewImpl.MakeSubViews(groupView, "Symbol".Split(','), groupByValue, _agentInstanceContext);
Assert.IsTrue(false);
}
catch (EPException)
{
// Expected exception
}
// Invalid for child node is a merge node - doesn't make sense to group and merge only
var mergeViewOne = new MergeView(_agentInstanceContext, SupportExprNodeFactory.MakeIdentNodesMD("Symbol"), null, false);
groupView.AddView(mergeViewOne);
try
{
GroupByViewImpl.MakeSubViews(groupView, "Symbol".Split(','), groupByValue, _agentInstanceContext);
Assert.IsTrue(false);
}
catch (EPException)
{
// Expected exception
}
// Add a size view parent of merge view
groupView = new GroupByViewImpl(_agentInstanceContext, expressions, ExprNodeUtility.GetEvaluators(expressions));
var firstElementView_1 = new FirstElementView(null);
groupView.AddView(firstElementView_1);
groupView.Parent = eventStream;
mergeViewOne = new MergeView(_agentInstanceContext, SupportExprNodeFactory.MakeIdentNodesMD("Symbol"), null, false);
firstElementView_1.AddView(mergeViewOne);
var subViews = GroupByViewImpl.MakeSubViews(groupView, "Symbol".Split(','), groupByValue, _agentInstanceContext);
Assert.IsTrue(subViews is FirstElementView);
Assert.IsTrue(subViews != firstElementView_1);
var firstEleView = (FirstElementView)subViews;
Assert.AreEqual(1, firstEleView.Views.Length);
Assert.IsTrue(firstEleView.Views[0] is AddPropertyValueView);
var md = (AddPropertyValueView)firstEleView.Views[0];
Assert.AreEqual(1, md.Views.Length);
Assert.IsTrue(md.Views[0] == mergeViewOne);
}
private void HandleEvent(EventBean theEvent, bool isNew)
{
var groupByValuesKey = GetGroupKey(theEvent);
// Get child views that belong to this group-by value combination
var subViews = _subViewsPerKey.Get(groupByValuesKey);
// If this is a new group-by value, the list of subviews is null and we need to make clone sub-views
if (subViews == null)
{
var subviewsList = GroupByViewImpl.MakeSubViews(this, _propertyNames, groupByValuesKey, _agentInstanceContext);
var currentTime = _agentInstanceContext.StatementContext.TimeProvider.Time;
subViews = new GroupByViewAgedEntry(subviewsList, currentTime);
_subViewsPerKey.Put(groupByValuesKey, subViews);
}
else
{
subViews.LastUpdateTime = _agentInstanceContext.StatementContext.TimeProvider.Time;
}
// Construct a pair of lists to hold the events for the grouped value if not already there
var pair = _groupedEvents.Get(subViews);
if (pair == null)
{
pair = new Pair <Object, Object>(null, null);
_groupedEvents.Put(subViews, pair);
}
// Add event to a child view event list for later child Update that includes new and old events
if (isNew)
{
pair.First = GroupByViewImpl.AddUpgradeToDequeIfPopulated(pair.First, theEvent);
}
else
{
pair.Second = GroupByViewImpl.AddUpgradeToDequeIfPopulated(pair.Second, theEvent);
}
}
public override void Update(EventBean[] newData, EventBean[] oldData)
{
var currentTime = _agentInstanceContext.TimeProvider.Time;
if ((_nextSweepTime == null) || (_nextSweepTime <= currentTime))
{
if ((ExecutionPathDebugLog.IsEnabled) && (Log.IsDebugEnabled))
{
Log.Debug("Reclaiming groups older then " + _reclaimMaxAge + " msec and every " + _reclaimFrequency + "msec in frequency");
}
_nextSweepTime = currentTime + _reclaimFrequency;
Sweep(currentTime);
}
// Algorithm for single new event
if ((newData != null) && (oldData == null) && (newData.Length == 1))
{
var theEvent = newData[0];
var newDataToPost = new EventBean[] { theEvent };
var groupByValuesKey = GetGroupKey(theEvent);
// Get child views that belong to this group-by value combination
var subViews = _subViewsPerKey.Get(groupByValuesKey);
// If this is a new group-by value, the list of subviews is null and we need to make clone sub-views
if (subViews == null)
{
var subviewsList = GroupByViewImpl.MakeSubViews(this, _propertyNames, groupByValuesKey, _agentInstanceContext);
subViews = new GroupByViewAgedEntry(subviewsList, currentTime);
_subViewsPerKey.Put(groupByValuesKey, subViews);
}
else
{
subViews.LastUpdateTime = currentTime;
}
GroupByViewImpl.UpdateChildViews(subViews.SubviewHolder, newDataToPost, null);
}
else
{
// Algorithm for dispatching multiple events
if (newData != null)
{
foreach (var newValue in newData)
{
HandleEvent(newValue, true);
}
}
if (oldData != null)
{
foreach (var oldValue in oldData)
{
HandleEvent(oldValue, false);
}
}
// Update child views
foreach (var entry in _groupedEvents)
{
var newEvents = GroupByViewImpl.ConvertToArray(entry.Value.First);
var oldEvents = GroupByViewImpl.ConvertToArray(entry.Value.Second);
GroupByViewImpl.UpdateChildViews(entry.Key, newEvents, oldEvents);
}
_groupedEvents.Clear();
}
}