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#1 Posted : Friday, February 17, 2017 12:35:32 PM(UTC)


Groups: Registered
Posts: 17

Thanks: 1 times

Hi Hadi,

the service is now correctly running thank you however I am getting the error stating that cache has not been setup. I have set the app setting value for the cache directory. Is there any documentation stating how to setup the caching


<add key="lt.Cache.Directory" value="C:\Development\Assets\Cache"/>
  <add key="lt.Cache.VirtualDirectory" value="http://core/_cache"/>

the c# code is as follows


var loadOptions = new LoadDocumentOptions();
            loadOptions.UseCache = true;
            loadOptions.CachePolicy = ServiceHelper.CreatePolicy();
            loadOptions.WebClient = null; 
            if (request.Options != null)
                loadOptions.AnnotationsUri = request.Options.AnnotationsUri;
                loadOptions.Name = request.Options.Name;
                loadOptions.Password = request.Options.Password;
                loadOptions.LoadEmbeddedAnnotations = request.Options.LoadEmbeddedAnnotations;
                loadOptions.MaximumImagePixelSize = request.Options.MaximumImagePixelSize;
            var documentName = request.Uri.ToString();

            //Check if this document was uploaded, then hope the user has set LoadDocumentOptions.Name to the original file name
            if (DocumentFactory.IsUploadDocumentUri(request.Uri) && !string.IsNullOrEmpty(loadOptions.Name))
                // Use that instead
                documentName = loadOptions.Name;

            var originalSetting = DocumentConverterPreferences.TryEnableTextFilter(DocumentFactory.RasterCodecsTemplate, documentName);
                Document document = null;
                    // first, check if this is pre-cached
                    if (PreCacheHelper.PreCacheExists)
                        string documentId = PreCacheHelper.CheckDocument(request.Uri, loadOptions.MaximumImagePixelSize);
                        if (documentId != null)
                            document = DocumentFactory.LoadFromCache(documentId);
                    if (document == null)
                        document = DocumentFactory.LoadFromUri(request.Uri, loadOptions);
                        if (document == null)
                            throw new InvalidOperationException("Failed to load URI: " + request.Uri);
                        ServiceHelper.SetRasterCodecsOptions(document.RasterCodecs, request.Resolution);
                        document.AutoDeleteFromCache = false;
                        document.AutoSaveToCache = false;
                        document.SaveToCache(); // The exception is thrown at this line
                    return new LoadFromUriResponse { Document = document };
                    if (document != null)
                DocumentConverterPreferences.RestoreTextFilter(DocumentFactory.RasterCodecsTemplate, originalSetting);

Thank you

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#2 Posted : Friday, February 17, 2017 3:37:23 PM(UTC)


Groups: Manager, Tech Support, Administrators
Posts: 218

Was thanked: 12 time(s) in 12 post(s)

Hey Maneka,

I created a new forum topic for this question since it was unrelated to the previous question.

The VirtualDirectory may be an absolute or relative path to a visible location on the server from the application root.

Here is more information on the CacheVirtualDirectory:

It may be that your service cannot access the virtual directory that you are defining in the config file that you pasted above.

Edited by user Wednesday, November 25, 2020 8:07:25 AM(UTC)  | Reason: Not specified

Hadi Chami
Developer Support Manager
LEAD Technologies, Inc.

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