In ACE 2, our components solely had MethodExpression properties to invoke when broadcasting events, as was typical with our compat components. With ACE 3, we introduced the use of ace:ajax as a means of specifying server-side execution and rendering, as well as client-side event handling.

The server-side event handling has become fragmented into three categories:

1. Old ACE components with an ACE 2 heritage continuing to use component MethodExpressions, where ace:ajax solely controls the component executing.

2. Early ACE 3 components using ace:ajax listener for the server-side event handling, with no equivalent MethodExpression existing on component.

3. Some newer ACE 3 components using both component MethodExpressions and ace:ajax listener, but not necessarily with the same event type, which could be confusing for application developers.


We need to migrate all of our components to #3, but with a single event type used for a particular event, whether it's for the component or ace:ajax.