Re: [log4j] Making Log4j 2 API "the Log4j API"

[Ralph Goers]

> On Jan 18, 2024, at 5:37 AM, Volkan Yazıcı <vol...@yazi.ci> wrote:
> 
> If we
> 
>   1. move all non-API (`AbstractLogger`, `PropertiesUtil`, etc.) classes
>   in `log4j-api-3.x` to a new `log4j-spi-3.x` module, and
>   2. Only implement `log4j-api-2.x` *interfaces* (not abstract classes!)
>   in `log4j-core`
> 
> we can have a Log4j 3 without a `log4j-api-3.x` module, right?

Spring uses PropertiesUtil. I suspect it isn’t alone. That would mean anything 
impacted by the property changes would have to be in the spi or abstracted to 
reference something in the spi. I am assuming a log4j-spi-2.x would also be 
needed. There are many other utility classes that have never been off limits 
for users to use.

While your idea could work it definitely would impact some users.

Ralph