public ViewServiceCreateResult CreateViews(
Viewable eventStreamViewable,
IList <ViewFactory> viewFactories,
AgentInstanceViewFactoryChainContext viewFactoryChainContext,
bool hasPreviousNode)
{
// Attempt to find existing views under the stream that match specs.
// The viewSpecList may have been changed by this method.
Pair <Viewable, IList <View> > resultPair;
if (hasPreviousNode)
{
resultPair = new Pair <Viewable, IList <View> >(eventStreamViewable, Collections.GetEmptyList <View>());
}
else
{
resultPair = ViewServiceHelper.MatchExistingViews(eventStreamViewable, viewFactories, viewFactoryChainContext.AgentInstanceContext);
}
var parentViewable = resultPair.First;
if (viewFactories.IsEmpty())
{
if (Log.IsDebugEnabled)
{
Log.Debug(".createView No new views created, dumping stream ... " + eventStreamViewable);
ViewSupport.DumpChildViews("EventStream ", eventStreamViewable);
}
return(new ViewServiceCreateResult(parentViewable, parentViewable, Collections.GetEmptyList <View>())); // we know its a view here since the factory list is empty
}
// Instantiate remaining chain of views from the remaining factories which didn't match to existing views.
var views = ViewServiceHelper.InstantiateChain(parentViewable, viewFactories, viewFactoryChainContext);
// Initialize any views that need initializing after the chain is complete
foreach (var view in views)
{
if (view is InitializableView)
{
var initView = (InitializableView)view;
initView.Initialize();
}
}
if (Log.IsDebugEnabled)
{
Log.Debug(".createView New views created for stream, all views ... " + eventStreamViewable);
ViewSupport.DumpChildViews("EventStream ", eventStreamViewable);
}
return(new ViewServiceCreateResult(views[views.Count - 1], views[0], views));
}
public void TestInstantiateChain()
{
SupportBeanClassView topView = new SupportBeanClassView(TEST_CLASS);
IList <ViewFactory> viewFactories = SupportViewSpecFactory.MakeFactoryListOne(topView.EventType);
AgentInstanceViewFactoryChainContext context = SupportStatementContextFactory.MakeAgentInstanceViewFactoryContext();
// Check correct views created
IList <View> views = ViewServiceHelper.InstantiateChain(topView, viewFactories, context);
Assert.AreEqual(3, views.Count);
Assert.AreEqual(typeof(LengthWindowView), views[0].GetType());
Assert.AreEqual(typeof(UnivariateStatisticsView), views[1].GetType());
Assert.AreEqual(typeof(LastElementView), views[2].GetType());
// Check that the context is set
viewFactories = SupportViewSpecFactory.MakeFactoryListFive(topView.EventType);
views = ViewServiceHelper.InstantiateChain(topView, viewFactories, context);
TimeWindowView timeWindow = (TimeWindowView)views[0];
}
