hangfire filter实现

internal class Program
{
static async Task Main(string[] args)
{
var filters = new List
{
new FilterA(),
new FilterB(),
};

Func continuation = () =>
{
return new BackgroundJob();
};

filters.Reverse();
var thunk = filters.Aggregate(continuation,
(next, filter) => () => InvokeClientFilter(filter, next));

thunk();
}

private static BackgroundJob InvokeClientFilter(IFilter filter, Func next)
{
filter.OnCreating();
var backgroungJob = next();
filter.OnCreated();
return backgroungJob;
}
}

public class FilterA : IFilter
{
public void OnCreated()
{
Console.WriteLine("FilterA: OnCreated");
}

public void OnCreating()
{
Console.WriteLine("FilterA: OnCreating");
}
}

public interface IFilter
{
void OnCreating();
void OnCreated();
}

public class FilterB : IFilter
{
public void OnCreated()
{
Console.WriteLine("FilterB: OnCreated");
}

public void OnCreating()
{
Console.WriteLine("FilterB: OnCreating");
}
}

public class BackgroundJob
{

}