ferenc-csaky commented on PR #25339:
URL: https://github.com/apache/flink/pull/25339#issuecomment-2352245005

   One other alternative would be to initialize a `PortRange` in the factory 
and pass that object in the `PrometheusReporter` ctor. `PortRange` stores the 
original original string config, and is converted into that in case of 
`toString()` so it will display the ports correctly. This way we do not need to 
care about converting to a list at all, simply getting the iterator through the 
`PortRange`, which was my original intent when I wrote that util. :)
   
   A con of this approach might be the usage of a fairly specific class instead 
of a common interface in the `PrometheusReporter` ctor, but since that ctor is 
not meant to use and should be instantiated by the factory IMO it does not 
really matter.
   
   WDYT?


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