Using custom sitecore data item clone notification - sitecore

Question

I understand that you can add new Notification for usage when cloning data items.
Where do you specify where you should use the custom Notification class?

Answer 1

We display a warning on items that have been cloned. The trick is to use the "getContentEditorWarnings" pipeline:
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
<sitecore>
<pipelines>
<getContentEditorWarnings>
<processor type="Example.OriginalItem, Example" patch:after="processor[#type='Sitecore.Pipelines.GetContentEditorWarnings.Notifications, Sitecore.Kernel']" />
</getContentEditorWarnings>
</pipelines>
</sitecore>
</configuration>
Then the code for this pipeline is:
using Sitecore.Globalization;
using Sitecore.Pipelines.GetContentEditorWarnings;
namespace Example
{
public class OriginalItem
{
public void Process(GetContentEditorWarningsArgs args)
{
var item = args.Item;
if ((item == null) || item.GetClones().Count() == 0) return;
var warning = args.Add();
warning.Title = "This Item has clones";
warning.IsExclusive = false;
}
}
}
Not really germane to your question, but in this example, we use the links db to find if the item has clones:
public static IEnumerable<Item> GetClones(this Item original)
{
Assert.ArgumentNotNull(original, "source");
return (from link in Globals.LinkDatabase.GetReferrers(original)
select link.GetSourceItem() into clone
where ((clone != null) && (clone.Source != null)) && (clone.Source.ID == original.ID)
select clone);
}