RFR: 6543126: Level.known can leak memory

[Chris Hegarty]

On 29/07/16 12:54, Daniel Fuchs wrote:
> Hi,
>
> Here is the new webrev with Chris & James feedback
> taken in.
>
> http://cr.openjdk.java.net/~dfuchs/webrev_6543126/webrev.01/

This looks good to me Daniel.

-Chris.

> best regards,
>
> -- daniel
>
> On 28/07/16 22:55, Daniel Fuchs wrote:
>> On 28/07/16 21:31, James Perkins wrote:
>>> I just happened to take a glance at this and noticed the remove method
>>> on the KnownLevels doesn't quite look right.
>>> Using Optional.of(nameToLevels.get(mirroredLevel.name)).ifPresent((x) ->
>>> x.remove(this)); will produce an NPE if the level is not present. If the
>>> intention is that the levels may not be present in the list the
>>> Optional.ofNullable() should be used.
>>>
>>
>> Thanks a lot for your keen eyes James!
>>
>> (sigh!) Why would Optional.of()  throw a NPE for null?
>> But it does...
>>
>> This wasn't caught by the test because remove() usually
>> follows a purge() and every call to purge() is synchronized,
>> so I don't think it could happen, technically - except possibly
>> for the call purge(KnownLevel). But you're right and the code
>> is wrong, of course.
>>
>> ofNullable() it is!
>>
>> best regards,
>>
>> -- daniel
>