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  • Jeric Yuen 327 posts 479 karma points
    Nov 01, 2019 @ 11:57
    Jeric Yuen
    0

    PageCacheRefresher in Umbraco V8

    Anyone knows what's the new PageCacheRefresher events on distributed servers on the new Umbraco V8?

    Thanks

  • Marc Goodson 1023 posts 6750 karma points MVP 4x c-trib
    Nov 01, 2019 @ 20:44
    Marc Goodson
    100

    Hi JLon

    I think you might be after this?

    public class RegisteringCacheUpdatedEvents : IUserComposer
    {
        public void Compose(Umbraco.Core.Composing.Composition composition)
        {
            ContentCacheRefresher.CacheUpdated += ContentCacheRefresher_CacheUpdated;
            MediaCacheRefresher.CacheUpdated += MediaCacheRefresher_CacheUpdated;
        }
    
        private void MediaCacheRefresher_CacheUpdated(MediaCacheRefresher sender, CacheRefresherEventArgs e)
        {
           //media cache updated
        }
    
        private void ContentCacheRefresher_CacheUpdated(ContentCacheRefresher sender, CacheRefresherEventArgs e)
        {
            //content cache updated!
        }
    }
    

    regards

    Marc

  • Jeric Yuen 327 posts 479 karma points
    Nov 04, 2019 @ 12:00
    Jeric Yuen
    0

    Thanks Marc :)

  • Jeric Yuen 327 posts 479 karma points
    5 days ago
    Jeric Yuen
    0

    Hey Marc,

    Do you also know if there's a way we can detect the type of the event.

    Eg if it's a Save and Publish or even if it's Unpublishing on a content?

    When I debug through the e.MessageObject within the ContentCacheRefresher_CacheUpdated()

    It keeps coming back as MessageType.RefreshByPayload for Save and Publish or Unpublishing

    Thanks

  • Marc Goodson 1023 posts 6750 karma points MVP 4x c-trib
    1 day ago
    Marc Goodson
    0

    Hi Jeric

    I can't find a good example of this, and I'm guessing a little but I think knowing the MessageType is RefreshByPayload, means you can cast the MessageObject into they type of Payload, and loop through each Payload, and it's ChangeType to determine a little about what is going on.

    Have a look at the Examine ContentCacheRefresherUpdated event handling implementation in the core:

    https://github.com/umbraco/Umbraco-CMS/blob/13488be0a3280c966ca5115c1cf75cc1979e5819/src/Umbraco.Web/Search/ExamineComponent.cs#L133

      foreach (var payload in (ContentCacheRefresher.JsonPayload[])args.MessageObject)
                {
                    if (payload.ChangeTypes.HasType(TreeChangeTypes.Remove))
                    {
                        // delete content entirely (with descendants)
                        //  false: remove entirely from all indexes
                        DeleteIndexForEntity(payload.Id, false);
                    }
    

    The ChangeTypes enum is here;

    public enum TreeChangeTypes : byte
    {
        None = 0,
    
        // all items have been refreshed
        RefreshAll = 1,
    
        // an item node has been refreshed
        // with only local impact
        RefreshNode = 2,
    
        // an item node has been refreshed
        // with branch impact
        RefreshBranch = 4,
    
        // an item node has been removed
        // never to return
        Remove = 8,
    }
    

    So you should be able to tell the difference between an Unpublish and a Publish.

    regards

    Marc

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