Custom action on deleted Noderef

[mangar]

I have an action that needs to be triggered on a delete action.  I write my action and hook it to a space rule. The action triggers fine.

However, I get an error:

org.alfresco.service.cmr.repository.InvalidNodeRefException: Node does not exist:‍

at this line of code:

String fileName = (String) nodeService.getProperty(actionedUponNodeRef, ContentModel.PROP_NAME);‍

which makes sense, as I just deleted the node.

How do I get path/filename etc..  info in an action where I just deleted the node?

How do i get the information before the node is deleted?

[mrogers]

You need to use the "before delete" event if you want to read any of the node's properties.

[mangar]

After some research, I see that I need to implement a policyComponent and override beforeDeleteNode().

It also looks like that this action would be called for every piece of content.  Is there a way to make this only happen in a certan folder, or for a certain kind of content?

I have gotten pretty good at writing actions, but this is lost on me. Do you have any examples?

[lista]

Another option is to find the node in the archives store, and get the properties from there.

[mangar]

Good idea.  However I can't seem to get the node from the ArchiveService.  in my executeImpl  () method i have this:

         System.out.println("AtionedUponNodeRef Node:"+actionedUponNodeRef.getId()+actionedUponNodeRef.getStoreRef().getIdentifier());
         NodeRef origNodeRef = archiveService.getArchivedNode(actionedUponNodeRef);   
         System.out.println("Original Node:"+origNodeRef.getId()+origNodeRef.getStoreRef().getIdentifier());‍‍‍

with the output being:

AtionedUponNodeRef Node:7adb1a27-6fcf-4321-8807-448bb9edf928SpacesStore
Original Node:7adb1a27-6fcf-4321-8807-448bb9edf928SpacesStore
‍‍‍

They are the same node.

How do I get the archived node?

[mangar]

The solution is a custom policy using the before delete node.

Here is an excellent tutorial by Jeff Potts on behaviours: http://ecmarchitect.com/images/articles/alfresco-behavior/behavior-article.pdf

here is my code snippet:

public class DeleteAsset implements NodeServicePolicies.BeforeDeleteNodePolicy  {
   
   private PolicyComponent policyComponent;
   private Behaviour beforeDeleteNode;
   
   public void init() {
      this.beforeDeleteNode = new JavaBehaviour(this,"beforeDeleteNode",NotificationFrequency.EVERY_EVENT);
      this.policyComponent.bindClassBehaviour(QName.createQName(NamespaceService.ALFRESCO_URI,"beforeDeleteNode"), 
            QName.createQName(MyModel.NAMESPACE,MyModel.ASSET_CONTENT_TYPE), this.beforeDeleteNode);
   }
   
   @Override
   public void beforeDeleteNode(NodeRef node) {
      System.out.println("beforeDeleteNode!");
      try {
         your code here         
      } catch(Exception e) {
         e.printStackTrace();
      }
      
   }
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Just add this just like any other spring bean (See tutorial) and away you go.  One key is the NotificationFrequency must be EVERY_EVENT so you can use your NodeService (or whatever) before the node is deleted!

Hope this helps someone.