The overall Scala-related plan for this FLIP is to ignore the Scala API
because of FLIP-265. The CEP Java/Scala version
parity (through the PatternScalaAPICompletenessTest) requires us to touch
the Scala API, though, because we want to offer an alternative to the
deprecated API in FLink 1.x. I wanted to point that out in that paragraph.

The alternative would have been to add an exclusion for the newly added
method. That sounded like a worse option. Deprecating the Scala API should
be independent from the parity of Java and Scala API in Flink 1.x.

I rewrote this paragraph in the FLIP. I hope it helps.

Matthias

On Mon, Jul 17, 2023 at 11:23 AM Chesnay Schepler <ches...@apache.org>
wrote:

> I don't understand this bit:/
>
> "One minor Scala change is necessary, though: We need to touch the Scala
> implementation of the Pattern class (in flink-cep). Pattern requires a
> new method which needs to be implemented in the Scala Pattern class as
> well to comply with PatternScalaAPICompletenessTest."
>
> /FLIP-265//states that /all/ Scala APIs will be removed, which should
> also cover CEP.
> //
> On 13/07/2023 12:08, Matthias Pohl wrote:
> > The 2.0 feature list includes the removal of Flink's Time classes in
> favor
> > of the JDKs java.time.Duration class. There was already a discussion
> about
> > it in [1] and FLINK-14068 [2] was created as a consequence of this
> > discussion.
> >
> > I started working on marking the APIs as deprecated in FLINK-32570 [3]
> > where Chesnay raised a fair point that there isn't a FLIP, yet, to
> > formalize this public API change. Therefore, I went ahead and created
> > FLIP-335 [4] to have this change properly documented.
> >
> > I'm not 100% sure whether there are better ways of checking whether we're
> > covering everything Public API-related. There are even classes which I
> > think might be user-facing but are not labeled accordingly (e.g.
> > flink-cep). But I don't have the proper knowledge in these parts of the
> > code. Therefore, I would propose marking these methods as deprecated,
> > anyway, to be on the safe side.
> >
> > I'm open to any suggestions on improving the Test Plan of this change.
> >
> > I'm looking forward to feedback on this FLIP.
> >
> > Best,
> > Matthias
> >
> > [1]https://lists.apache.org/thread/76yywnwf3lk8qn4dby0vz7yoqx7f7pkj
> > [2]https://issues.apache.org/jira/browse/FLINK-14068
> > [3]https://issues.apache.org/jira/browse/FLINK-32570
> > [4]
> >
> https://cwiki.apache.org/confluence/display/FLINK/FLIP-335%3A+Removing+Flink%27s+Time+classes
> >
>

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