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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5910) Document use of Connection.close() with try-with-resources
Date Thu, 18 Oct 2012 18:00:04 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13479189#comment-13479189

Rick Hillegas commented on DERBY-5910:

Thanks, Kim. Looks great. +1
> Document use of Connection.close() with try-with-resources
> ----------------------------------------------------------
>                 Key: DERBY-5910
>                 URL: https://issues.apache.org/jira/browse/DERBY-5910
>             Project: Derby
>          Issue Type: Improvement
>          Components: Documentation
>    Affects Versions:
>            Reporter: Kim Haase
>            Assignee: Kim Haase
>         Attachments: DERBY-5910-2.diff, DERBY-5910-2.zip, DERBY-5910-3.diff, DERBY-5910-3.zip,
DERBY-5910-4.diff, DERBY-5910-4.zip, DERBY-5910.diff, DERBY-5910.stat, DERBY-5910.zip
> The Java SE 7 try-with-resources feature can cause problems with AutoCloseable objects
like java.sql.Connection. You must be careful when writing portable code which declares Connections
in the initializers of try-with-resources blocks, because Derby raises an exception if you
try to close a Connection with uncommitted work in-flight. 
> Changing Derby's Connection.close() to always commit in-flight work (and not raise an
exception) would create backward compatibility issues, but we do not know yet how serious
these issues would be, owing to a lack of data.
> Rather than change Derby's behavior now, we should document how Derby's Connection.close()
behaves and describe the portability issues involved in declaring Derby Connections in try-with-resources

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