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 Remove(EventStream eventStream, Viewable viewToRemove)
{
// If the viewToRemove to remove has child viewToRemove, don't disconnect - the child ViewToRemove(s) need this
if (viewToRemove.HasViews)
{
return;
}
if (Log.IsDebugEnabled)
{
Log.Debug(".remove Views before the remove of view " + viewToRemove + ", for event stream " + eventStream);
ViewSupport.DumpChildViews("EventStream ", eventStream);
}
// Remove views in chain leaving only non-empty parent views to the child view to be removed
ViewServiceHelper.RemoveChainLeafView(eventStream, viewToRemove);
if (Log.IsDebugEnabled)
{
Log.Debug(".remove Views after the remove, for event stream " + eventStream);
ViewSupport.DumpChildViews("EventStream ", eventStream);
}
}