On Mon, 3 Jul 2023 15:49:31 GMT, Jose Pereda <jper...@openjdk.org> wrote:

> This PR adds a check to the Animation and AnimationTimer public methods to 
> verify that these are called from the JavaFX Application thread. If the call 
> is done from any other thread, an IllegalStateException will be thrown.
> 
> This will prevent users from getting unexpected errors (typically NPE, like 
> the one posted in the JBS issue), and will fail fast with a clear exception 
> and reason for it.
> 
> The javadoc of the Animation and AnimationTimer classes and public methods 
> has been updated accordingly.
> 
> Tests for both classes have been included, failing (as in no exceptions were 
> thrown when calling from a background thread) before this patch, and passing 
> (as in ISE was thrown).

@jperedadnr In case you missed it, this PR is not `rfr` due to white space 
errors.

At first glance, this looks like a good fix. Since this enforces a new 
threading restriction on existing animation methods, it will need a CSR.

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PR Comment: https://git.openjdk.org/jfx/pull/1167#issuecomment-1656735642
PR Comment: https://git.openjdk.org/jfx/pull/1167#issuecomment-1656736296

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