Cancellation Token

Using Cancellation Tokens — Hangfire Documentation

Hangfire provides support for cancellation tokens for our background jobs to let them know when a shutdown request was initiated, or job performance was aborted. In the former case the job will be automatically put back to the beginning of its queue, allowing Hangfire to process it after restart.

https://docs.hangfire.io/en/latest/background-methods/using-cancellation-tokens.html

Given a cancellation request is make, the task will end and be scheduled for re-execution, this is something you must consider, to ensure non-duplicate scenarios.

Queueing a Task

BackgroundJob.Enqueue<IService>(x => x.LongRunningMethod(CancellationToken.None));

Task

public async Task LongRunningMethod(CancellationToken token)
{
    for (var i = 0; i < Int32.MaxValue; i++)
    {
        await Task.Delay(TimeSpan.FromSeconds(1), token);
    }
}

Cancellation Polling Interval Options

services.AddHangfireServer(new BackgroundJobServerOptions
{
    CancellationCheckInterval = TimeSpan.FromSeconds(5) // Default value
});