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 TestMatch()
{
SupportStreamImpl stream = new SupportStreamImpl(TEST_CLASS, 10);
IList <ViewFactory> viewFactories = SupportViewSpecFactory.MakeFactoryListOne(stream.EventType);
// No views under stream, no matches
Pair <Viewable, IList <View> > result = ViewServiceHelper.MatchExistingViews(stream, viewFactories);
Assert.AreEqual(stream, result.First);
Assert.AreEqual(3, viewFactories.Count);
Assert.AreEqual(0, result.Second.Count);
// One top view under the stream that doesn't match
SupportBeanClassView testView = new SupportBeanClassView(TEST_CLASS);
stream.AddView(new FirstElementView(null));
result = ViewServiceHelper.MatchExistingViews(stream, viewFactories);
Assert.AreEqual(stream, result.First);
Assert.AreEqual(3, viewFactories.Count);
Assert.AreEqual(0, result.Second.Count);
// Another top view under the stream that doesn't matche again
testView = new SupportBeanClassView(TEST_CLASS);
stream.AddView(new LengthWindowView(SupportStatementContextFactory.MakeAgentInstanceViewFactoryContext(), null, 999, null));
result = ViewServiceHelper.MatchExistingViews(stream, viewFactories);
Assert.AreEqual(stream, result.First);
Assert.AreEqual(3, viewFactories.Count);
Assert.AreEqual(0, result.Second.Count);
// One top view under the stream that does actually match
LengthWindowView myLengthWindowView = new LengthWindowView(SupportStatementContextFactory.MakeAgentInstanceViewFactoryContext(), null, 1000, null);
stream.AddView(myLengthWindowView);
result = ViewServiceHelper.MatchExistingViews(stream, viewFactories);
Assert.AreEqual(myLengthWindowView, result.First);
Assert.AreEqual(2, viewFactories.Count);
Assert.AreEqual(1, result.Second.Count);
Assert.AreEqual(myLengthWindowView, result.Second[0]);
// One child view under the top view that does not match
testView = new SupportBeanClassView(TEST_CLASS);
viewFactories = SupportViewSpecFactory.MakeFactoryListOne(stream.EventType);
EventType type = UnivariateStatisticsView.CreateEventType(SupportStatementContextFactory.MakeContext(), null, 1);
UnivariateStatisticsViewFactory factory = new UnivariateStatisticsViewFactory();
factory.EventType = type;
factory.FieldExpression = SupportExprNodeFactory.MakeIdentNodeBean("LongBoxed");
myLengthWindowView.AddView(new UnivariateStatisticsView(factory, SupportStatementContextFactory.MakeAgentInstanceViewFactoryContext()));
result = ViewServiceHelper.MatchExistingViews(stream, viewFactories);
Assert.AreEqual(1, result.Second.Count);
Assert.AreEqual(myLengthWindowView, result.Second[0]);
Assert.AreEqual(myLengthWindowView, result.First);
Assert.AreEqual(2, viewFactories.Count);
// Add child view under the top view that does match
viewFactories = SupportViewSpecFactory.MakeFactoryListOne(stream.EventType);
UnivariateStatisticsViewFactory factoryTwo = new UnivariateStatisticsViewFactory();
factoryTwo.EventType = type;
factoryTwo.FieldExpression = SupportExprNodeFactory.MakeIdentNodeBean("IntPrimitive");
UnivariateStatisticsView myUnivarView = new UnivariateStatisticsView(factoryTwo, SupportStatementContextFactory.MakeAgentInstanceViewFactoryContext());
myLengthWindowView.AddView(myUnivarView);
result = ViewServiceHelper.MatchExistingViews(stream, viewFactories);
Assert.AreEqual(myUnivarView, result.First);
Assert.AreEqual(1, viewFactories.Count);
// Add ultimate child view under the child view that does match
viewFactories = SupportViewSpecFactory.MakeFactoryListOne(stream.EventType);
LastElementView lastElementView = new LastElementView(null);
myUnivarView.AddView(lastElementView);
result = ViewServiceHelper.MatchExistingViews(stream, viewFactories);
Assert.AreEqual(lastElementView, result.First);
Assert.AreEqual(0, viewFactories.Count);
}
