RFR 9: JDK-8146028 : Common Cleaner for finalization replacements in java.base

[Roger Riggs]

The follow on work to adding the Cleaner is to replace uses of 
finalization with uses of the Cleaner.
For the 'easy' cases in the java.base module, it is useful to introduce 
a private Cleaner for the
java.base module.  It is proposed to be held weakly, to allow it to 
terminate on a lightly loaded
system.

Webrev for Review:
http://cr.openjdk.java.net/~rriggs/webrev-cleaning-factory-8146028/


The 2nd step is using the Cleaner.
  - Empty finalize methods should (I think) be removed; but since they 
are part of the public spec
    the process needs two full releases; so the proposal is to deprecate 
them first.
    (The JEP 277 necessary changes will be updated when JEP 277 
semantics are finalized)

- In a few cases, the code in the finalizer is redundant and if removed 
would allow
   an optimization of the handling of the finalizer and future removal 
of the finalize method.

Webrev:
http://cr.openjdk.java.net/~rriggs/webrev-cleaning-finalizers/index.html

Thanks for comments and suggestions,  Roger