Rebuild search index on application start in Xperience by Kentico

RebuildIndexPostStartModule.cs

using CMS;
using CMS.Base;
using CMS.Core;
using CMS.DataEngine;
using Kentico.Xperience.Lucene.Core.Indexing;

[assembly: RegisterModule(typeof(RebuildIndexPostStartModule))]

public class RebuildIndexPostStartModule : Module
{
    private ILuceneClient? luceneClient;
    private IEventLogService? eventLogService;

    public RebuildIndexPostStartModule()
        : base("RebuildIndex")
    {
    }

    protected override void OnInit()
    {
        base.OnInit();

        luceneClient = Service.Resolve<ILuceneClient>();
        eventLogService = Service.Resolve<IEventLogService>();
        
        if (eventLogService != null)
        {
            eventLogService.LogInformation(nameof(RebuildIndexPostStartModule), nameof(OnInit), "RebuildIndexPostStartModule initialized");
        }
        
        ApplicationEvents.PostStart.Execute += (sender, e) => Task.Run(() => RebuildIndex());
    }

    private async Task RebuildIndex()
    {
        try
        {
            if (luceneClient != null)
            {
                await luceneClient.Rebuild(Constants.NewsSearchIndex, null);
            }
            
            if (eventLogService != null)
            {
                eventLogService.LogInformation(nameof(RebuildIndexPostStartModule), nameof(RebuildIndex), "RebuildIndexPostStartModule finished");
            }
        }
        catch (Exception ex)
        {
            if (eventLogService != null)
            {
                eventLogService.LogException(nameof(RebuildIndexPostStartModule), nameof(RebuildIndex), ex);
            }
        }
    }
}