Module system and services directory in META-INF

[Jochen Theodorou]

On 26.12.2017 19:30, Jochen Theodorou wrote:
> hi all,
> 
> Do all files in META-INF/services now have to be well formed according 
> to the SPI strucutres in Java, or is it still valid to have other files 
> in there as well? Before the module system it was no problem to have in 
> there service decriptors, that are services, but do not use the 
> ServiceProvider structure. Nothing was disturbed as long as nobody tried 
> to load it that way. Now this seems to be different and I am wondering 
> where this got specified.
> 
> Because the spec does not try to define file layouts so much I have the 
> feeling that this is not really specified by the java module system. Was 
> it then a decision by some maven plugin writers or maybe even the javac 
> guys?

I found 
https://docs.oracle.com/javase/8/docs/technotes/guides/jar/jar.html#Service_Provider 

Is there no Java 9 version? Also the spec is not specific enough for 
this as it sounds more like implicit assumption than specification

bye Jochen