有关Quartz.NET，与一线码农大佬对个线?

//----------------选自Quartz.Simpl.SimpleJobFactory类-------------
using System;
using Quartz.Logging;
using Quartz.Spi;
using Quartz.Util;
namespace Quartz.Simpl
{
    /// <summary> 
    /// The default JobFactory used by Quartz - simply calls 
    /// <see cref="ObjectUtils.InstantiateType{T}" /> on the job class.
    /// </summary>
    /// <seealso cref="IJobFactory" />
    /// <seealso cref="PropertySettingJobFactory" />
    /// <author>James House</author>
    /// <author>Marko Lahma (.NET)</author>
    public class SimpleJobFactory : IJobFactory
    {
        private static readonly ILog log = LogProvider.GetLogger(typeof (SimpleJobFactory));

        /// <summary>
        /// Called by the scheduler at the time of the trigger firing, in order to
        /// produce a <see cref="IJob" /> instance on which to call Execute.
        /// </summary>
        /// <remarks>
        /// It should be extremely rare for this method to throw an exception -
        /// basically only the case where there is no way at all to instantiate
        /// and prepare the Job for execution.  When the exception is thrown, the
        /// Scheduler will move all triggers associated with the Job into the
        /// <see cref="TriggerState.Error" /> state, which will require human
        /// intervention (e.g. an application restart after fixing whatever
        /// configuration problem led to the issue with instantiating the Job).
        /// </remarks>
        /// <param name="bundle">The TriggerFiredBundle from which the <see cref="IJobDetail" />
        ///   and other info relating to the trigger firing can be obtained.</param>
        /// <param name="scheduler"></param>
        /// <returns>the newly instantiated Job</returns>
        /// <throws>  SchedulerException if there is a problem instantiating the Job. </throws>
        public virtual IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler)
        {
            IJobDetail jobDetail = bundle.JobDetail;
            Type jobType = jobDetail.JobType;
            try
            {
                if (log.IsDebugEnabled())
                {
                    log.Debug($"Producing instance of Job '{jobDetail.Key}', class={jobType.FullName}");
                }

                return ObjectUtils.InstantiateType<IJob>(jobType);
            }
            catch (Exception e)
            {
                SchedulerException se = new SchedulerException($"Problem instantiating class '{jobDetail.JobType.FullName}'", e);
                throw se;
            }
        }

        /// <summary>
        /// Allows the job factory to destroy/cleanup the job if needed. 
        /// No-op when using SimpleJobFactory.
        /// </summary>
        public virtual void ReturnJob(IJob job)
        {
            var disposable = job as IDisposable;
            disposable?.Dispose();
        }
    }
}

//------------------节选自Quartz.Util.ObjectUtils类-------------------------
 public static T InstantiateType<T>(Type type)
{
     if (type == null)
     {
          throw new ArgumentNullException(nameof(type), "Cannot instantiate null");
     }
     ConstructorInfo ci = type.GetConstructor(Type.EmptyTypes);
     if (ci == null)
     {
          throw new ArgumentException("Cannot instantiate type which has no empty constructor", type.Name);
     }
     return (T) ci.Invoke(new object[0]);
}