commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Emmanuel Bourg (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SANDBOX-408) CSVFormat describes itself as immutable, but it is not - in particular it is not thread-safe
Date Tue, 06 Mar 2012 21:47:58 GMT

    [ https://issues.apache.org/jira/browse/SANDBOX-408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13223691#comment-13223691
] 

Emmanuel Bourg commented on SANDBOX-408:
----------------------------------------

Could you elaborate a bit in this issue Seb? I'm scratching my head on this and I fail to
see how the current design defeats the thread safety. I even wrote a test trying the demonstrate
the class wasn't thread safe but I didn't succeed.

Is it sufficient to make the fields volatile and leave the logic as is?
                
> CSVFormat describes itself as immutable, but it is not - in particular it is not thread-safe
> --------------------------------------------------------------------------------------------
>
>                 Key: SANDBOX-408
>                 URL: https://issues.apache.org/jira/browse/SANDBOX-408
>             Project: Commons Sandbox
>          Issue Type: Bug
>          Components: CSV
>            Reporter: Sebb
>
> CSVFormat describes itself as immutable, but it is not @Immutable - the class fields
are all mutable.
> The methods that change the fields do so by creating a clone, and returning the changed
clone.
> So in a sense the class is immutable.
> However, the normal expectation is that @Immutable classes are @ThreadSafe.
> CSVFormat is not thread-safe, because the fields are not volatile, and the fields are
not written & read using a common lock.
> The comment needs to be clarified or removed.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message