Prevent OnItemProcessed event occuring for more than once per publish based on condition

Question

I have below situation where, I have to prevent OnItemProcessed event from occuring more than once.

namespace Website
{
    public class ItemEventHandler
    {
        public void OnItemProcessed(object sender, EventArgs args)
        {
            // Code here will be processed once for every item in that publish event.



            if(condition){
            Queue.WriteMessage();
            }

            // once message is written to Queue based on condition, this event handler should not be run for subsequent items in that publish event
        }
    }
}

events config patch

<sitecore>
    <events>
      <event name="publish:itemProcessed">
        <handler type="Website.ItemEventHandler, Website" method="OnItemProcessed">
        </handler>
      </event>
    </events>
  </sitecore>

Answer 1

Add a public static bool variable in the ItemEventHandler class and set it totrue when the condition is satisfied.

Then add another event handler on publish:end which will reset the variable back to false.

It will do the trick assuming that you have only 1 Sitecore instance publishing items at the same time and you're not using publishing service.