Hangfire :: Background Jobs

• An Open source framework which helps to create, process and manage background jobs
• Hangfire
• Actual Repo | Forked Repo

Types:

• Fire-and-forget jobs
  • Fire-and-forget jobs are executed only once and almost immediately after creation.

  var jobId = BackgroundJob.Enqueue(() => Console.WriteLine("Fire-and-forget!"));
  

  • steps:
    • Serialize method and parameters
    • Create new background job based on the serialized information
    • Save to Job Storage and Queue
    • Return to Caller
    • Hangfire server picks up Job and processes
    • Job status updated
• Delayed jobs
  • Delayed jobs are executed only once too, but not immediately, after a certain time interval.

  var jobId = BackgroundJob.Schedule( () => Console.WriteLine("Delayed!"), TimeSpan.FromDays(7));
  

• Recurring jobs
  • Recurring jobs fire many times on the specified CRON schedule.

  RecurringJob.AddOrUpdate( () => Console.WriteLine("Recurring!"), Cron.Daily);
  

• Continuations
  • Continuations are executed when its parent job has been finished.

  BackgroundJob.ContinueWith( jobId, () => Console.WriteLine("Continuation!"));
  

• Batches Pro
  • Batch is a group of background jobs that is created atomically and considered as a single entity.

  var batchId = BatchJob.StartNew(x =>
  {
      x.Enqueue(() => Console.WriteLine("Job 1"));
      x.Enqueue(() => Console.WriteLine("Job 2"));
  });
  

• Batch Continuations Pro
  • Batch continuation is fired when all background jobs in a parent batch finished.

  BatchJob.ContinueWith(batchId, x =>
  {
      x.Enqueue(() => Console.WriteLine("Last Job"));
  });