C# event debounce

Question

I\'m listening to a hardware event message, but I need to debounce it to avoid too many queries.

This is an hardware event that sends the machine status and I have t

Answer 1

Simply remember the latest 'hit:

DateTime latestHit = DatetIme.MinValue;

private void eventRxVARxH(MachineClass Machine)
{
    log.Debug("Event fired");
    if(latestHit - DateTime.Now < TimeSpan.FromXYZ() // too fast
    {
        // ignore second hit, too fast
        return;
    }
    latestHit = DateTime.Now;
    // it was slow enough, do processing
    ...
}

This will allow a second event if there was enough time after the last event.

Please note: it is not possible (in a simple way) to handle the last event in a series of fast events, because you never know which one is the last...

...unless you are prepared to handle the last event of a burst which is a long time ago. Then you have to remember the last event and log it if the next event is slow enough:

DateTime latestHit = DatetIme.MinValue;
Machine historicEvent;

private void eventRxVARxH(MachineClass Machine)
{
    log.Debug("Event fired");

    if(latestHit - DateTime.Now < TimeSpan.FromXYZ() // too fast
    {
        // ignore second hit, too fast
        historicEvent = Machine; // or some property
        return;
    }
    latestHit = DateTime.Now;
    // it was slow enough, do processing
    ...
    // process historicEvent
    ...
    historicEvent = Machine; 
}