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User based recources?

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Li Zhou
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Li Zhou asked on 06 Jul 2010, 07:29 PM
I am following http://www.telerik.com/help/aspnet-ajax/schedule_databindingimplementingaproviderthatsupportsmultivaluedresources.html to create a custom provider and I have some questions:

I want to create user based resources, i.g. each user can create their own resources, or "tag".  Each appointment can have one or multiple "tags".  User can sort appointment based on the custom "tags".

In the article, it states that
"Implement the GetResourcesByType method to supply the scheduler with a list of possible values given a resource type. This requires a query to the database to obtain the list of values. Once retrieved, the resources are cached. "

Is it possible to cache the resources based on a userID (a guid) ?  Do you provide any interface to override the Cache key?  What is the build-in Cache invalidation machenism?  If one user modifed his custom resources, how to make it not effect other users resourcs?

Thanks!

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T. Tsonev
Telerik team
answered on 14 Jul 2010, 09:44 AM
Hi Li,

Apologies for the late reply.

The provider implementation in the help article caches the resources in lists (_teachers, _students) to improve performance. There's no cache invalidation for the sake of simplicity.

You can turn off the caching to ensure that you're always getting up-to-date information.

private IDictionary<int, Resource> Teachers
{
    get
    {
        var teachers = new Dictionary<int, Resource>();
        foreach (Resource teacher in LoadTeachers())
        {
            _teachers.Add((int)teacher.Key, teacher);
        }
 
        return _teachers;
    }
}

If you intend to implement caching we recommend you to use the standard ASP.NET Cache. It should give you fine grained control over the lifetime of the cached entries.

I hope this helps.

All the best,
Tsvetomir Tsonev
the Telerik team
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Li Zhou
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answered on 14 Jul 2010, 02:05 PM
Tsvetomir ,

Thanks for your reply. that helps

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