Passing IJobCancellationToken into an async task/query

question
1

In our application, we’re using Hangfire to queue up long running database queries. However, on deleting the job, it doesn’t cancel the query. Doing some research, I have found that we need to pass IJobCancellationToken into our long running job when we run BackgroundJob.Enqueue(), IE

BackgroundJob.Enqueue(() => LongRunningMethod(JobCancellationToken.Null));

and then we are supposed to run:

public void LongRunningMethod(IJobCancellationToken cancellationToken)
{
    //Code here
    cancellationToken.ThrowIfCancellationRequested();
}

However, all that is occurring in the Code here comment is a _db.Execute(someCommand); There is an async version of method called _db.ExecuteAsync(someCommand, CancellationToken); but I am not sure how to hook up the IJobCancellationToken to cancel the async CancellationToken. Is something like this possible? What’s the approach here?

2

You cannot.

I’ve created a pull request some time ago, but it is not merged yet. You can build it from source though (or use the workaround method proposed in the discussion there).

3

Interesting, will use the work around. Thanks. Any way to expedite this to getting merged? Seems like an important feature for long running asynchronous jobs.