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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-10828" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-6e09c20c-96e4-4a98-b345-ed6ae5f5b8e8" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-10828" style="color: #3b73af; text-decoration: none">HHH-10828</a> </td>
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<td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HHH-10828" style="color: #3b73af; text-decoration: none">When the field annotated with @RevisionTimestamp accepts java.util.Date, it should use UTC</a> </span> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th>
<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-6e09c20c-96e4-4a98-b345-ed6ae5f5b8e8" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.0.0.Final, 5.1.0, 5.2.1, 5.2.0 </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Assignee:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Components:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> hibernate-envers </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 10/Jun/2016 04:02 AM </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Labels:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> envers core </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Priority:</th>
<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-major-bc1dc171-dcf9-40db-a819-5b2888a5dcfd" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Reporter:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="marcg" id="email_marcg" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=marcg" style="color:#6c797f;; color: #3b73af; text-decoration: none">Marcelo Glasberg</a> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Original Estimate:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top">1.5h</td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Remaining Estimate: </th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top">1.5h</td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0; margin-top: 0">Suppose you have:</p>
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<pre class="code-java" style="margin: 10px 0 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@RevisionTimestamp
@Temporal (TemporalType.TIMESTAMP)
<span class="code-keyword" style="color: #000091">private</span> Date timestamp;
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The timestamp should be saved in the database as UTC, but instead it is saved as a Local time (that depends on the local timezone of the computer). This makes no sense, since a timezone change (or the same software running on different countries) will result in different time references, and incompatible software. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Time should always be in UTC in the database, because the client software may convert it to Local time, when necessary. The opposite is not always true (some other client accessing the same database may be in a different timezone, and there is no way of knowing).</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The workaround, at the moment, is to add this to the class anotated as @RevisionEntity:</p>
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<pre class="code-java" style="margin: 10px 0 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">static</span> {
<span class="code-comment" style="color: #808080">// Use UTC <span class="code-keyword" style="color: #000091; color: #808080">for</span> revision timestamp.
</span> TimeZone.setDefault(TimeZone.getTimeZone(ZoneId.of(<span class="code-quote" style="color: #009100">"UTC"</span>)));
}
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">However, this workaround may have undesirable side-effects. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><b>Note 1</b>: In <span class="jira-issue-macro" data-jira-key="HHH-10827">
<!-- replace the span with an AUI template --> <a href="https://hibernate.atlassian.net/browse/HHH-10827" class="jira-issue-macro-key" style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=xsmall&avatarId=12143&avatarType=issuetype"> HHH-10827 </a> - <span class="summary">The field annotated with @RevisionTimestamp should accept type java.time.LocalDateTime</span> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-complete jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">Open</span> </span> I ask for Hibernate to accept the timestamp in java.time.LocalDateTime, which already contains timezone info, and naturally should result in correct timestamps when saved to the database.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><b>Note 2:</b> The original timestamp from DefaultRevisionEntity uses "long" as timestamp, and I don't know and haven't tested if this is mapped to UTC or not. If not, it should be fixed as well:</p>
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<pre class="code-java" style="margin: 10px 0 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@RevisionTimestamp
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">long</span> timestamp;
</pre>
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