Registering custom text extractor does not work

[ghost]

I have registered a custom text extractor (PdfPig).

However it doesn't hit any of my break points, and it doesn't seem to return any results.

I have registered it as below:

using Examine;
using Examine.LuceneEngine.Providers;
using Umbraco.Core;
using Umbraco.Core.Composing;
using UmbracoExamine.PDF;
using UmbracoExaminePDF.Extractors;

namespace UmbracoExaminePDF.Composers
{
    [ComposeAfter(typeof(ExaminePdfComposer))] //this must execute after the ExaminePdfComposer composer
    public class ExaminePdfComposer : ComponentComposer<ExaminePdfComponent>, IUserComposer
    {
        public override void Compose(Composition composition)
        {
            composition.RegisterUnique<IPdfTextExtractor, PdfPigTextExtractor>();
        }
    }

    public class ExaminePdfComponent : IComponent
    {
        private readonly IExamineManager _examineManager;

        public ExaminePdfComponent(IExamineManager examineManager)
        {
            _examineManager = examineManager;
        }

        public void Initialize()
        {
            //Get both the external and pdf index
            if (_examineManager.TryGetIndex(Constants.UmbracoIndexes.ExternalIndexName, out var externalIndex)
                && _examineManager.TryGetIndex(PdfIndexConstants.PdfIndexName, out var pdfIndex))
            {
                //register a multi searcher for both of them
                var multiSearcher = new MultiIndexSearcher("MultiSearcher", new IIndex[] { externalIndex, pdfIndex });
                _examineManager.AddSearcher(multiSearcher);
            }
        }

        public void Terminate() { }
    }
}

And the Pdf pig extractor is pretty simple:

using System.IO;
using System.Text;
using UglyToad.PdfPig;
using UglyToad.PdfPig.Content;
using UmbracoExamine.PDF;

namespace UmbracoExaminePDF.Extractors
{
    /// <summary>
    /// Extracts text from a PDF using PdfPig
    /// https://github.com/UglyToad/PdfPig
    /// </summary>
    public class PdfPigTextExtractor : IPdfTextExtractor
    {
        public string GetTextFromPdf(Stream pdfFileStream)
        {
            using (PdfDocument document = PdfDocument.Open(pdfFileStream))
            {
                var result = new StringBuilder();
                foreach (Page page in document.GetPages())
                {
                    result.AppendLine(page.Text);
                }

                return result.ToString();
            }
        }
    }
}

Any help would be appreciated

[cleversolutions]

I'll take a look at this and get back to you. PDFPig looks really promising, I have been putting a ton of effort into adding text extraction to PDFSharp, and this seems to do a pretty decent job out of the box, and it's Apache 2.0 licensed.

[kdx-perbol]

This works for us. We ReqisterUnique in a composer that ComposeAfters ExaminePdfComposer, and our extractor runs. Code is trivial, but let me know if needed.