Execute DB call within Scheduled Job - asp.net-core

Question

I got a project built under ASP Core 2 that utilizes the Quartz.NET scheduler 3-beta1
I've got the following job that i want to execute:
public class TestJob: IJob
{
private readonly AppDbContext _dbContext;
public TestJob(AppDbContext dbContext)
{
_dbContext = dbContext;
}
public Task Execute(IJobExecutionContext context)
{
Debug.WriteLine("Test check at " + DateTime.Now);
var testRun = _dbContext.TestTable.Where(o => o.CheckNumber > 10).ToList();
Debug.WriteLine(testRun.Count);
return Task.CompletedTask;
}
}
Unfortunately it never works and there are not error logs to indicate an issue.
Yet when i remove everything and just leave the Debug.WriteLine it works as per below example.
public class TestJob: IJob
{
public Task Execute(IJobExecutionContext context)
{
Debug.WriteLine("Test check at " + DateTime.Now);
return Task.CompletedTask;
}
}
How can i get my job to execute the database call?
EDIT 1: Job Creation
var schedulerFactory = new StdSchedulerFactory(properties);
_scheduler = schedulerFactory.GetScheduler().Result;
_scheduler.Start().Wait();
var testJob = JobBuilder.Create<TestJob>()
.WithIdentity("TestJobIdentity")
.Build();
var testTrigger = TriggerBuilder.Create()
.WithIdentity("TestJobTrigger")
.StartNow()
.WithSimpleSchedule(x => x.WithIntervalInMinutes(1).RepeatForever())
.Build();
if (CheckIfJobRegistered(testJob.Key).Result == false)
_scheduler.ScheduleJob(testJob, testTrigger).Wait();

Answer 1

The main problem here is that Quartz can't create the job and swallows the exception.
The Documentation states:
When a trigger fires, the JobDetail (instance definition) it is associated to is loaded, and the job class it refers to is instantiated via the JobFactory configured on the Scheduler. The default JobFactory simply calls the default constructor of the job class using Activator.CreateInstance, then attempts to call setter properties on the class that match the names of keys within the JobDataMap. You may want to create your own implementation of JobFactory to accomplish things such as having your application’s IoC or DI container produce/initialize the job instance.
Quartz provides the IJobFactory to achieve that. And it works really good with Dependency Injection. A JobFactory can look like this:
public class JobFactory : IJobFactory
{
//TypeFactory is just the DI Container of your choice
protected readonly TypeFactory Factory;
public JobFactory(TypeFactory factory)
{
Factory = factory;
}
public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler)
{
try
{
return Factory.Create(bundle.JobDetail.JobType) as IJob;
}
catch (Exception e)
{
//Log the error and return null
//every exception thrown will be swallowed by Quartz
return null;
}
}
public void ReturnJob(IJob job)
{
//Don't forget to implement this,
//or the memory will not released
Factory.Release(job);
}
}
Then just register your JobFactory with the scheduler and everything should work:
_scheduler.JobFactory = new JobFactory(/*container of choice*/);
Edit:
Additionally you can take a look to one of my previous answers.