RFR (S): CR 8005926: (thread) Merge ThreadLocalRandom state into java.lang.Thread

Doug Lea dl at cs.oswego.edu
Tue Jan 15 17:28:31 UTC 2013

On 01/15/13 11:33, Chris Hegarty wrote:
> Updated webrev:
>    http://cr.openjdk.java.net/~chegar/8005926/webrev.01/webrev/

Looks great; thanks!!


>   * based on Aleksey initial webrev
>   * applied serialPersistentFields, writeObject, readResolve
>     ( as suggested by Heinz )
>   * did not apply readObject. It is unnecessary, defaultReadObject
>     will read all the fields off the stream
> readResolve is necessary to give us "good" behavior ( as noted previously ).
> Once integrated, I will file a new bug to track the possible change of
> serialized form of TLR, and this can then remove serialPersistentFields and
> writeObject, if successful.
> -Chris.
> On 01/15/2013 01:57 PM, Alan Bateman wrote:
>> On 15/01/2013 13:49, Chris Hegarty wrote:
>>> But wouldn't there be an issue with JDK7 TLR streams being
>>> deserialized by JDK8, pad fields would be left in the Object input
>>> steam? If so, then we're down the road of having to have a readObject,
>>> etc... and possibly back to serialPersistentFields?
>> Technically deleting fields is an incompatible change as the stream will
>> not contain the fields. If someone is crazy enough to serialize with
>> jdk8 TLR and send it to a jdk7 release then the fields will have their
>> default value (as the values aren't in the stream). As the fields aren't
>> used then I don't think this should make a difference. Going the other
>> way shouldn't be an issue either as the pad fields will be ignored.
>> -Alan.

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