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From "Kim Haase (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DERBY-5910) Document use of Connection.close() with try-with-resources
Date Fri, 24 Aug 2012 15:10:00 GMT



























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                                    <a class="user-hover" rel="chaase3" id="email_chaase3"
href="https://issues.apache.org/jira/secure/ViewProfile.jspa?name=chaase3" style="color:#326ca6;">Kim
Haase</a>
     created <img src="https://issues.apache.org/jira/images/icons/improvement.gif" height="16"
width="16" border="0" align="absmiddle" alt="Improvement"> <a style='color:#326ca6;text-decoration:none;'
href='https://issues.apache.org/jira/browse/DERBY-5910'>DERBY-5910</a>
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0 16px 0;">
                <a style='color:#326ca6;text-decoration:none;' href='https://issues.apache.org/jira/browse/DERBY-5910'><strong>Document
use of Connection.close() with try-with-resources</strong></a>
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        <strong style="font-weight:normal;color:#505050;">Issue Type:</strong>
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0 10px 0;width:100%;">
                <img src="https://issues.apache.org/jira/images/icons/improvement.gif"
height="16" width="16" border="0" align="absmiddle" alt="Improvement">        Improvement
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10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Affects Versions:</strong>
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0 10px 0;width:100%;">
                    10.9.1.0            </td>
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10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Assignee:</strong>
    </td>
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0 10px 0;width:100%;">
                                        <a class="user-hover" rel="chaase3" id="email_chaase3"
href="https://issues.apache.org/jira/secure/ViewProfile.jspa?name=chaase3" style="color:#326ca6;">Kim
Haase</a>
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10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Components:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0
0 10px 0;width:100%;">
                    Documentation            </td>
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10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Created:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0
0 10px 0;width:100%;">
        24/Aug/12 16:09
    </td>
</tr>                        <tr valign="top">
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10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Description:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0
0 10px 0;width:100%;">
        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. 
<br/>

<br/>
Changing Derby&#39;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.
<br/>

<br/>
Rather than change Derby&#39;s behavior now, we should document how Derby&#39;s Connection.close()
behaves and describe the portability issues involved in declaring Derby Connections in try-with-resources
initializers. 
<br/>

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        <strong style="font-weight:normal;color:#505050;">Project:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0
0 10px 0;width:100%;">
        <a style="color:#326ca6;" href="https://issues.apache.org/jira/browse/DERBY">Derby</a>
    </td>
</tr>                                                <tr valign="top">
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0
10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Priority:</strong>
    </td>
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0 10px 0;width:100%;">
                <img src="https://issues.apache.org/jira/images/icons/priority_major.gif"
height="16" width="16" border="0" align="absmiddle" alt="Major">        Major
    </td>
</tr>                        <tr valign="top">
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10px 10px 0;white-space:nowrap;">
        <strong style="font-weight:normal;color:#505050;">Reporter:</strong>
    </td>
    <td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0
0 10px 0;width:100%;">
                                        <a class="user-hover" rel="chaase3" id="email_chaase3"
href="https://issues.apache.org/jira/secure/ViewProfile.jspa?name=chaase3" style="color:#326ca6;">Kim
Haase</a>
                </td>
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