hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6476) Replace all occurrances of System.currentTimeMillis() with EnvironmentEdge equivalent
Date Thu, 06 Sep 2012 05:38:08 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13449433#comment-13449433
] 

Lars Hofhansl commented on HBASE-6476:
--------------------------------------

Hmm... Tests are *precisely* the place where you want to control time (i.e. not real time),
so you do not need to write time dependent tests. And this specifically true to random number
generation, so you get a predictable (or at least identical on each run) sequence of random
numbers.

Now, maybe in some cases you actually have to make you won't get the same random for each
run, but by default you get the real time; so you just don't override the default EnvironmentEdge.

I'm confused now.

                
> Replace all occurrances of System.currentTimeMillis() with EnvironmentEdge equivalent
> -------------------------------------------------------------------------------------
>
>                 Key: HBASE-6476
>                 URL: https://issues.apache.org/jira/browse/HBASE-6476
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>            Priority: Minor
>             Fix For: 0.96.0
>
>         Attachments: 6476.txt, 6476-v2.txt, 6476-v2.txt
>
>
> There are still some areas where System.currentTimeMillis() is used in HBase. In order
to make all parts of the code base testable and (potentially) to be able to configure HBase's
notion of time, this should be generally be replaced with EnvironmentEdgeManager.currentTimeMillis().
> How hard would it be to add a maven task that checks for that, so we do not introduce
System.currentTimeMillis back in the future?

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message