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  1. Derby
  2. DERBY-6932

Migrate finalization to the new Cleaner-based pattern introduced by JDK 9 build 167

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    Details

    • Type: Improvement
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 10.14.1.0
    • Fix Version/s: None
    • Labels:
      None
    • Urgency:
      Normal

      Description

      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

        Attachments

        1. ClientConnection.patch
          25 kB
          Richard N. Hillegas
        2. derby-6932-01-aa-suppressDeprecationWarnings.diff
          7 kB
          Richard N. Hillegas

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              • Assignee:
                Unassigned
                Reporter:
                rhillegas Richard N. Hillegas
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                • Created:
                  Updated: