webscript synchronized problem

redybol2013 — Tue, 25 Dec 2012 10:28:25 GMT

hello everyone:I hvae meet a problem about execute a same webscrpit twice at the same time.The second webscript executed when the first's unfinished.The main job of the webscript is updating or creating node by a imported file.Before the creating node, script will check the same name node existed or

Re: webscript synchronized problem

iblanco — Mon, 08 Apr 2013 15:32:00 GMT

As you state the problem seems to be that your second transaction does not see the new node because it was created in a parallel transaction so it tries to create it and throws a duplicaChildNodeNameException.

Alfresco has a <a href="http://wiki.alfresco.com/wiki/Java_Foundation_API#Using_RetryingTransactionHelper" target="_blank">RetryingTransactionHelper</a> that could make your code retry in case of a failure like this. But keep those things in mind:

1.- Call <a href="http://dev.alfresco.com/resource/docs/java/repository/org/alfresco/repo/transaction/RetryingTransactionHelper.html#doInTransaction(org.alfresco.repo.transaction.RetryingTransactionHelper.RetryingTransactionCallback, boolean, boolean)">doInTransaction</a> so that a new transaction is used, otherwise you won't see the new node in the second attempt either.
2. - Only some <a href="http://svn.alfresco.com/repos/alfresco-open-mirror/alfresco/HEAD/root/projects/repository/source/java/org/alfresco/repo/transaction/RetryingTransactionHelper.java">exceptions classes</a> cause retrying,so you might have to capture DuplicateChildNodeNameException and rethrow it as one of those exceptions.

Good luck

topic webscript synchronized problem in Alfresco Archive

webscript synchronized problem

Re: webscript synchronized problem