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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/HSEARCH" style="color: #3b73af; text-decoration: none">Hibernate Search</a> / <a href="https://hibernate.atlassian.net/browse/HSEARCH-1270" style="color: #3b73af; text-decoration: none"><img src="https://hibernate.atlassian.net/images/icons/issuetypes/improvement.png" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HSEARCH-1270" style="color: #3b73af; text-decoration: none">HSEARCH-1270</a>
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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/HSEARCH-1270" style="color: #3b73af; text-decoration: none">Clear the pending indexing tasks at Session.clear()</a> </span>
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Change By:
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<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="hardy.ferentschik" id="email_hardy.ferentschik" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=hardy.ferentschik" style="color:#6c797f;; color: #3b73af; text-decoration: none">Hardy Ferentschik</a>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <span class="diffcontext">I have a use-case with a nested transaction in a loop.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br /><br /></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br /><br /></span> <span class="diffcontext">When the nested transaction is committed, I manually flush and clear the Hibernate-Session, because otherwise, the program would run into an</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{</span> <span class="diffcontext"> OutOfMemoryException</span> <span class="diffaddedchars" style="background-color:#ddfade;">}}</span> <span class="diffcontext">, because it loads to many objects into the Hibernate</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">-Session</span> <span class="diffaddedchars" style="background-color:#ddfade;"> session</span> <span class="diffcontext">.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br /><br /></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br /><br /></span> <span class="diffcontext">Sometimes, the nested transaction is rolled back, to cancel some work, because of invalid data or other errors. In this case I have to clear the Hibernate</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">-Session</span> <span class="diffaddedchars" style="background-color:#ddfade;"> session</span> <span class="diffcontext">, so that the modified objects are not saved by Hibernate.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br /><br /></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br /><br /></span> <span class="diffcontext">When the nested transaction is committed and I am flushing the</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> HibernateSession</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{Session}}</span> <span class="diffcontext">, I can flush the</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{</span> <span class="diffcontext"> FullTextSession</span> <span class="diffaddedchars" style="background-color:#ddfade;">}}</span> <span class="diffcontext"> accordingly via</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{</span> <span class="diffcontext"> FullTextSession.flushToIndexes()</span> <span class="diffaddedchars" style="background-color:#ddfade;">}}</span> <span class="diffcontext">.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br /><br /></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br /><br /></span> <span class="diffcontext">But, when the nested transaction has to be rolled back, I am not able to cancel the work recorded by the</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{</span> <span class="diffcontext"> FullTextSession</span> <span class="diffaddedchars" style="background-color:#ddfade;">}}</span> <span class="diffcontext">.</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{</span> <span class="diffcontext"> FullTextSession.clear()</span> <span class="diffaddedchars" style="background-color:#ddfade;">}}</span> <span class="diffcontext"> has no effect on the queued work. This leads to errors: because I have flushed the Hibernate</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">-Session</span> <span class="diffaddedchars" style="background-color:#ddfade;"> session</span> <span class="diffcontext"> manually, the queued work sometimes is causing</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{</span> <span class="diffcontext"> LazyInitializationException</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">'</span> <span class="diffaddedchars" style="background-color:#ddfade;">}}</span> <span class="diffcontext">s. And: it should not be written to the index, because I have thrown away the modified objects and the index would get out of sync, if the queued work is not canceled.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br /><br /></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br /><br /></span> <span class="diffcontext">I searched the documentation and the internet for hours, but I can't find any way, to cancel work.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br /><br /></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br /><br /></span> <span class="diffcontext">I think it would be reasonable, to overwrite</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{</span> <span class="diffcontext"> Session.clear()</span> <span class="diffaddedchars" style="background-color:#ddfade;">}}</span> <span class="diffcontext"> in</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{</span> <span class="diffcontext"> FullTextSession</span> <span class="diffaddedchars" style="background-color:#ddfade;">}}</span> <span class="diffcontext"> and cancel all queued work, like when the session is rolled back. Because, this is, what a user expects, when he clears the</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{</span> <span class="diffcontext"> FullTextSession</span> <span class="diffaddedchars" style="background-color:#ddfade;">}}</span> <span class="diffcontext">.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br /></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br /><br /></span> <span class="diffcontext">Another possibility would be, to implement a Method like</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{</span> <span class="diffcontext"> FullTextSession.clearQueuedWork()</span> <span class="diffaddedchars" style="background-color:#ddfade;">}}</span> <span class="diffcontext"> or</span> <span class="diffaddedchars" style="background-color:#ddfade;"> {{FullTextSession</span> <span class="diffcontext"> .cancelWork()</span> <span class="diffaddedchars" style="background-color:#ddfade;">}}</span> <span class="diffcontext">.</span>
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