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<td class="page-title-pattern-first-line " style="padding: 0; 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-12980" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-40a9998c-952d-418f-9d87-dbf9e741f7b0" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-12980" style="color: #3b73af; text-decoration: none">HHH-12980</a> </td>
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<td style="vertical-align: top;; padding: 0; 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-12980" style="color: #3b73af; text-decoration: none">EntityEntry should read version from managed entity before flush</a> </span> </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.3.6 </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: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 17/Sep/2018 18:41 PM </td>
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<td class="has-icon" style="padding: 0; 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-f5e4b5c8-8b4a-4620-9a87-5b13c9384e4f" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="quaff" id="email_quaff" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=quaff" style="color:#6c797f;; color: #3b73af; text-decoration: none">Yanming Zhou</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">A typical use case is passing version from hidden field of UI form to detect version conflict, but EntityEntry always use the version loaded from database, change managed entity version doesn't make sense. </p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
        @Test(expected = OptimisticLockException.class)
        <span class="code-keyword" style="color: #000091">public</span> void testManagedEntity() <span class="code-keyword" style="color: #000091">throws</span> Exception {
                Session s = openSession();
                Transaction tx = s.beginTransaction();
                Company company = <span class="code-keyword" style="color: #000091">new</span> Company();
                assertEquals(-1, company.getVersion());
                company.setName(<span class="code-quote" style="color: #009100">"a"</span>);
                s.save(company);
                tx.commit();
                tx = s.beginTransaction();
                assertEquals(0, company.getVersion());
                company.setName(<span class="code-quote" style="color: #009100">"b"</span>);
                s.update(company);
                tx.commit();
                tx = s.beginTransaction();
                assertEquals(1, company.getVersion());
                company.setName(<span class="code-quote" style="color: #009100">"c"</span>);
                company.setVersion(company.getVersion() - 1); <span class="code-comment" style="color: #808080">// simulate pass version from UI form
</span>                s.update(company);
                tx.commit();
                tx = s.beginTransaction();
                assertEquals(2, company.getVersion());
                s.close();
        }
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">this test case will fail.</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
        @Test(expected = OptimisticLockException.class)
        <span class="code-keyword" style="color: #000091">public</span> void testDetachedEntity() <span class="code-keyword" style="color: #000091">throws</span> Exception {
                Session s = openSession();
                Transaction tx = s.beginTransaction();
                Company company = <span class="code-keyword" style="color: #000091">new</span> Company();
                assertEquals(-1, company.getVersion());
                company.setName(<span class="code-quote" style="color: #009100">"a"</span>);
                s.save(company);
                tx.commit();
                s.close();
                s = openSession();
                tx = s.beginTransaction();
                assertEquals(0, company.getVersion());
                company.setName(<span class="code-quote" style="color: #009100">"b"</span>);
                s.update(company);
                tx.commit();
                s.close();
                s = openSession();
                tx = s.beginTransaction();
                assertEquals(1, company.getVersion());
                company.setName(<span class="code-quote" style="color: #009100">"c"</span>);
                company.setVersion(company.getVersion() - 1); <span class="code-comment" style="color: #808080">// simulate pass version from UI form
</span>                s.update(company);
                tx.commit();
                assertEquals(2, company.getVersion());
                s.close();
        }
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">this test case will pass.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">My solution is add setVersion() method for EntityEntry, and call it before flush</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-comment" style="color: #808080">// DefaultFlushEntityEventListener.onFlushEntity()
</span>entry.setVersion(Versioning.getVersion(values, persister));
</pre>
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