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Posted to dev@flink.apache.org by Timo Walther <tw...@apache.org> on 2020/09/21 06:54:21 UTC

Re: Can you unify the language ?

Hi,

you are right. Having two languages in the code base doesn't make our 
lives easier. But Flink is a big project with a long history, multiple 
design shifts, and many contributors. It is naturally that the bigger a 
code base gets, the messier it looks like. It must be a continuous 
effort to improve legacy code.

We are aiming to have Scala only in dedicated API modules. We encourage 
people to choose Java whenever new code is developed or refactored. So 
eventually, Flink might be Scala free but this will take some time.

For example, we have already dedicated porting guidelines for the 
flink-table module [1][2]. I'm sure other component maintainers have 
similar thoughts.

Regards,
Timo

[1] 
https://cwiki.apache.org/confluence/display/FLINK/FLIP-28%3A+Long-term+goal+of+making+flink-table+Scala-free
[2] 
https://cwiki.apache.org/confluence/display/FLINK/FLIP-32%3A+Restructure+flink-table+for+future+contributions

On 19.09.20 16:21, 490548661 wrote:
> The Flink code is too messy. It uses both Java and scala.&nbsp;
> Can you unify the language and use Java only .&nbsp; Is it not tiring to maintain two sets of codes&nbsp;
>