Mattflaschen added a subscriber: Mattflaschen.
Mattflaschen added a comment.
Herald added a project: Discovery.

This could also be seen as a replacement for some use cases of MW hooks and 
hook listeners.  Right now, if the hook listener throws an exception, that 
breaks the code that triggered the hook (e.g. T102874: Using Special:EnableFlow 
on a French Wikiproject page has broken the page completely 
<https://phabricator.wikimedia.org/T102874>).

If the hook doesn't have to alter or return any values (e.g. to tell the 
hook-running code to do something), it might be able to use an event bus 
instead.  If the event bus listener has a bug, my understanding is that 
wouldn't cause the code that emits the event to break.


TASK DETAIL
  https://phabricator.wikimedia.org/T84923

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To: Mattflaschen
Cc: Mattflaschen, Ottomata, mmodell, Eevans, chasemp, brion, Krenair, Halfak, 
JanZerebecki, bd808, MZMcBride, mobrovac, GWicke, aaron, daniel, Hardikj, 
yuvipanda, JAllemandou, jkroll, Smalyshev, Wikidata-bugs, Jdouglas, RobH, aude, 
Manybubbles, mark, RobLa-WMF, faidon, fgiunchedi, Dzahn, jeremyb, Malyacko, 
P.Copp



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