pagecacherefresher in umbraco v8

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Jay 415 posts 641 karma points

Nov 01, 2019 @ 11:57

0

PageCacheRefresher in Umbraco V8

Using Umbraco And Getting Started

Umbraco 8

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

Thanks

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Marc Goodson 2141 posts 14344 karma points MVP 8x c-trib

Nov 01, 2019 @ 20:44

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

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Jay 415 posts 641 karma points

Nov 04, 2019 @ 12:00

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Thanks Marc :)

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Jay 415 posts 641 karma points

Dec 04, 2019 @ 15:44

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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

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Marc Goodson 2141 posts 14344 karma points MVP 8x c-trib

Dec 07, 2019 @ 08:22

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.

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