RFR: 8191564: Refactor GC related servicability code into GC specific subclasses

[mandy chung]

On 11/30/17 10:26 AM, Roman Kennke wrote:
> Hi Mandy,
>
> thanks for reviewing! I think Erik Ö. already pushed it for me.
>
>> A minor comment that GCMemoryManager could take an enum to indicate 
>> the type of this  GC action (major vs minor).   This can be a future 
>> cleanup.
>
> This may be overly restrictive: some GCs may not necessarily provide a 
> major/minor distinction, but have only one GC manager (e.g. epsilon), 
> or may provide 3 or more GC managers (e.g. 'minor' partial (or young) 
> GC, 'intermediate' concurrent GC, 'intermediate or major' concurrent 
> full GC, 'major' STW last-ditch full GC...).

Right - there will be more than 2 enums and major and major are just 
examples that could let GC notififer to determine the message based on 
the type.  This is minor and just a thought that can be considered in 
the future.

Thanks.
Mandy