What would the developer do to ensure their observer runs after the observer defined by the third-party module?

An Adobe Commerce developer has installed a module from a third-party vendor. This module fires a custom event named third_party_event_after and also defines an observer named third_party_event_after_observer that listens to that event. The developer wants to listen to this custom event in their own module but wants to execute their observer’s logic after the third_party_event_after_observer observer has finished executing.

What would the developer do to ensure their observer runs after the observer defined by the third-party module?
A . Ensure the third-party module is listed in the <sequence> node of the developer’s module.xmi file.
B. Set the sort order of the new observer to be less than that of the third-party vendor’s observer.
C. This is not possible as observers listening to the same event may be invoked in any order.

View Answer

Answer: B

Explanation:

To ensure that the developer’s observer runs after the observer defined by the third-party module, they need to set the sort order of the new observer to be less than that of the third-party vendor’s observer.

The sort order is a number that is assigned to each observer. The lower the number, the earlier the observer will be executed.

For example, if the third-party vendor’s observer has a sort order of 10, the developer’s observer would need to have a sort order of 9 or lower.