Event Handler

The event handler in Thorium is responsible for triggering reactions based on events in Thorium. An event in thorium is an action taking place like:

• Uploading a file/repo
• Creating tags

When these event happen they are pushed into a stream in redis. The event handler then pops events from this stream and determines if the conditions for a pipeline trigger have been met. If they have then a reaction will be created for the user whose event met this triggers conditions. A single event can trigger multiple distinct triggers.

Event Handler FAQ's

Is there a delay between events being created and being processed

Yes, the event handler trails live events by 3 seconds. This is to ensure that Scylla has a chance to become consistent before the event handler process an event. Event though event data is stored in Redis the event-handler often has to query for additional data to determine if a trigger's conditions have been met. This data is stored in Scylla and so requires some time to become consistent.

What stops an infinite loop in events?

Triggers have an configurable depth limit meaning any events that reach that limit will be immediately dropped instead of processed.

Can I replay events?

No, once an event is processed it is dropped and cannot be replayed.