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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6932) Migrate finalization to the new Cleaner-based pattern introduced by JDK 9 build 167
Date Sun, 07 May 2017 17:24:04 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15999958#comment-15999958
] 

ASF subversion and git services commented on DERBY-6932:
--------------------------------------------------------

Commit 1794230 from [~rhillegas] in branch 'code/trunk'
[ https://svn.apache.org/r1794230 ]

DERBY-6932: Tests passed cleanly against derby-6932-01-aa-suppressDeprecationWarnings.diff,
committing...

> Migrate finalization to the new Cleaner-based pattern introduced by JDK 9 build 167
> -----------------------------------------------------------------------------------
>
>                 Key: DERBY-6932
>                 URL: https://issues.apache.org/jira/browse/DERBY-6932
>             Project: Derby
>          Issue Type: Improvement
>          Components: JDBC, Network Client, Network Server
>    Affects Versions: 10.14.0.0
>            Reporter: Rick Hillegas
>         Attachments: ClientConnection.patch, derby-6932-01-aa-suppressDeprecationWarnings.diff
>
>
> As of build 167, JDK 9 deprecated the finalize() method. This produces deprecation warnings
when compiling several Derby classes. See https://issues.apache.org/jira/browse/DERBY-6856?focusedCommentId=15990011&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15990011
. The recommended fix is a non-trivial mini-project, viz., to migrate to a new finalization
pattern based on a newly added Java 9 class, java.lang.ref.Cleaner. Peter Levart kindly mocked
up the fix for one affected Derby class (ClientConnection). See http://cr.openjdk.java.net/~plevart/misc/Cleaner/derby/ClientConnection_finalize2cleaner.patch
> Further discussion can be found on the following open-jdk email thread: http://mail.openjdk.java.net/pipermail/core-libs-dev/2017-May/047417.html



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