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Problem With Storage(FileStorage) when changing HostAppId

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Fernando
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Fernando asked on 03 Oct 2018, 01:30 PM
I have a Web Application using Telerik.Reporting.Services.WebApi with Html5 ReportViewer with a custom controller, where depending on the report type it uses a custom resolver.
There are 3 different report types and each one uses a HostAppId with a custom resolver. The storage is a Telerik.Reporting.Cache.File.FileStorage pointing to the same path for all 3 report types.

But after starting the application and generating the first report type, the other 2 types generates information in the storage path, but the report does not display any information, always being '0 pages loaded so far ...'.
It opens infinite requests - one after another - to an url like this "~/clients/085352-e708/instances/083615-c3d7/documents/085412-2b2a085412-5cbd/info" giving the same json response for them all:
{
"documentReady":false,
"pageCount":0,
"documentMapAvailable":false,
"bookmarkNodes":null,
"documentMapNodes":null
}

I believe that somehow by changing HostAppId, the cache is lost. How I fix this?

ReportBaseController

public class ReportBaseController<TReportResolver> : ReportsControllerBase
   where TReportResolver : IReportResolver, new()
{
   protected virtual string HostAppId { get; }

   protected string ReportCachePath => HttpContext.Current.Server.MapPath($"~/App_Data/reportcache");

   public ReportBaseController()
   {
       if (!Directory.Exists(ReportCachePath))
           Directory.CreateDirectory(ReportCachePath);

       this.ReportServiceConfiguration = new ReportServiceConfiguration
       {
           HostAppId = this.HostAppId,
           ReportResolver = new TReportResolver(),
           Storage = new Telerik.Reporting.Cache.File.FileStorage(ReportCachePath)
       };
   }
}


Controllers of the 3 different report types:

public class ReportSystemController : ReportBaseController<SystemReportResolver>
{
   protected override string HostAppId => "ReportSystem";
}

public class ReportClientController : ReportBaseController<ClientReportResolver>
{
   protected override string HostAppId => "ReportClient";
}

public class ReportListController : ReportBaseController<ListReportResolver>
{
   protected override string HostAppId => "ReportList";
}

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Nasko
Telerik team
answered on 05 Oct 2018, 03:31 PM
Hello Fernando,

The FileStorage implementation is not suitable to work with multiple Reporting REST service instances. You can use a storage implementation suitable for multiple-instance scenario: IStorage implementation suitable for deploying in Web Farms.

Another option would be to use a single service per application. What is the purpose of the different ReportsControllerBase implementations in your application?

Regards,
Nasko
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Fernando
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Nasko
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