Override Database Agent class to add display name

DatabaseAgent.cs

namespace Sitecore.Tools.Extensions
{
    using System;
    using System.Collections;
    using Sitecore.Data.Items;
    using Sitecore.Diagnostics;
    using Sitecore.Jobs;
    using Sitecore.Tasks;

    public class DatabaseAgent : Tasks.DatabaseAgent
    {
        public DatabaseAgent(string databaseName, string scheduleRoot) : base(databaseName, scheduleRoot)
        {
        }

        public new void Run()
        {
            this.LogInfo("Scheduling.DatabaseAgent started. Database: " + this.Database.Name);

            Job job = Context.Job;

            ScheduleItem[] schedules = this.GetSchedules();

            this.LogInfo($"Examining schedules (count: {schedules.Length})");

            if (this.IsValidJob(job))
            {
                job.Status.Total = schedules.Length;
            }

            foreach (ScheduleItem scheduleItem in schedules)
            {
                try
                {
                    if (scheduleItem.IsDue)
                    {
                        this.LogInfo($"Starting: {scheduleItem.Name} {(scheduleItem.Asynchronous ? "(asynchronously)" : string.Empty)}");

                        if (!scheduleItem.Asynchronous)
                        {
                            job.Options.JobDisplayName = scheduleItem.DisplayName;
                        }

                        scheduleItem.Execute();

                        this.LogInfo("Ended: " + scheduleItem.Name);
                    }
                    else
                    {
                        this.LogInfo("Not due: " + scheduleItem.Name);
                    }

                    if (scheduleItem.AutoRemove)
                    {
                        if (scheduleItem.Expired)
                        {
                            this.LogInfo("Schedule is expired. Auto removing schedule item: " + scheduleItem.Name);
                            scheduleItem.Remove();
                        }
                    }
                }
                catch (Exception ex)
                {
                    Log.Error($"An error occurred. Message: {ex.Message}. StackTrace: {ex.StackTrace}", this);
                }

                if (this.IsValidJob(job))
                {
                    ++job.Status.Processed;
                }
            }
        }

        private bool IsValidJob(Job job)
        {
            if (job != null)
            {
                return job.Category == "schedule";
            }

            return false;
        }

        private ScheduleItem[] GetSchedules()
        {
            Item obj = this.Database.Items[this.ScheduleRoot];

            if (obj == null)
            {
                return new ScheduleItem[0];
            }

            ArrayList arrayList = new ArrayList();

            foreach (Item descendant in obj.Axes.GetDescendants())
            {
                if (descendant.TemplateID == TemplateIDs.Schedule)
                {
                    arrayList.Add(new ScheduleItem(descendant));
                }
            }

            return arrayList.ToArray(typeof(ScheduleItem)) as ScheduleItem[];
        }

        private void LogInfo(string message)
        {
            if (!this.LogActivity)
            {
                return;
            }

            Log.Info(message, this);
        }
    }
}