Publish notifications from RecurringHostedServiceBase

[skttl]

I would like to suggest that RecurringHostedServiceBase should publish notifications in different areas, and publicize the period and delay fields.

I think there should be notifications for

• RecurringHostedServiceScheduling
• RecurringHostedServiceScheduled
• RecurringHostedServiceRescheduling
• RecurringHostedServiceRescheduled
• RecurringHostedServiceExecuting
• RecurringHostedServiceExecuted
• RecurringHostedServiceStopping
• RecurringHostedServiceStopped

I've been looking at doing a PR for this, but in my head it ends up doing a breaking change because I need a scope to publish the notifications.

Is there any other way to do it?

What do I want that for?
What I'm envisioning is that I can create a package that uses these notifications to collect stats about the running background tasks in a project.

I want to use the stats for a hangfire-esque dashboard with an overview of the background tasks.

So I want to collect when a task I scheduled for, how long it has been running etc. I'm thinking of storing these data in an SQL table, and then pull the data to a dashboard, where I want to be able to do stuff like "Run now", and "Cancel"

[bergmania]

Hi @skttl..

Sounds like a good idea.. The way to archive this without introducing a breaking changes is something like this:

        private readonly IEventAggregator _eventAggregator;

        [Obsolete("Use the ctor that inject parameters")]
        protected RecurringHostedServiceBase() : this(StaticServiceProvider.Instance.GetRequiredService<IEventAggregator>())
        {
        }

        protected RecurringHostedServiceBase(IEventAggregator eventAggregator)
        {
            _eventAggregator = eventAggregator;
        }

Then then you can use
await _eventAggregator.PublishAsync(new RecurringHostedServiceScheduling(this))

To publish events..

Note that, we need to have v9/dev merged into v9/contrib before the StaticServiceProvider works in hosted services.

[skttl]

Thats great news - sounds like my first v9 PR is coming then :)