[hibernate-dev] Timestamper

[Steve Ebersole]

Alex, the issue you mentioned says it was fixed for 2.4.3, but I am not 
seeing SlewClock in 2.4.3 jar.

What version was SlewClock added in?

On Fri 27 Apr 2012 08:36:33 AM CDT, Steve Ebersole wrote:
>
> Alex, the issue you mentioned says it was fixed for 2.4.3, but I am
> not seeing SlewClock in 2.4.3 jar.
>
> What version was SlewClock added in?
>
> On Thu 26 Apr 2012 12:48:31 PM CDT, Steve Ebersole wrote:
>>
>> Thanks for the heads up Alex.
>>
>> https://hibernate.onjira.com/browse/HHH-7282
>>
>>
>> On Thu 26 Apr 2012 11:11:36 AM CDT, Alex Snaps wrote:
>>>
>>> Hey,
>>> I wanted to draw your attention to "an issue" we've hit with the
>>> nonblocking implementation of Timestamper, that you guys use as well.
>>> Basically, if time goes backwards, calling next() would loop until
>>> time is passed the last seen value (see
>>> http://jira.terracotta.org/jira/browse/EHC-853)
>>> Technically, time shouldn't go back. Especially the DST issue is none
>>> in my opinion. But NTP daemons that do set clock back might be more
>>> common.
>>> As every session is timestamped, if I read
>>> SessionFactoryImpl.SessionBuilderImpl.openSession correctly, this
>>> would be larger issue to you guys now as well. There are obviously
>>> more people using Hibernate w/o Ehcache than with it.
>>> Anyways, as a solution to that, Chris and I came up with a
>>> non-blocking SlewClock implementation that would simply, in case
>>> System.currentTimeMillis() returns a value "in the past, slow time
>>> down until the wall clock has caught up:
>>> http://www.massapi.com/source/ehcache-2.4.3/src/net/sf/ehcache/util/SlewClock.java.html 
>>>
>>>
>>>
>>> Since Timestamper is again core to 2nd level cache usage in Hibernate,
>>> it would make sense to this out of our code base and have it in yours
>>> (as well, as we'd still use it in for the 3.x).
>>> Should I go ahead and create a jira, pull request, ... ? Cause, based
>>> on my experience, blaming it on crappy env. hasn't really worked out
>>> for me ;-)
>>> Alex
>>
>>
>> -- 
>> steve at hibernate.org
>> http://hibernate.org
>> -- 
>> steve at hibernate.org
>> http://hibernate.org