[jira] [Assigned] (SENTRY-1501) SentryStore shouldn't synchronize openTransaction() and commitUpdateTransaction()

["Alexander Kolbasov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SENTRY-1501?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexander Kolbasov reassigned SENTRY-1501:
------------------------------------------

    Assignee: Alexander Kolbasov

> SentryStore shouldn't synchronize openTransaction() and commitUpdateTransaction()
> ---------------------------------------------------------------------------------
>
>                 Key: SENTRY-1501
>                 URL: https://issues.apache.org/jira/browse/SENTRY-1501
>             Project: Sentry
>          Issue Type: Improvement
>          Components: Sentry
>    Affects Versions: 1.7.0, sentry-ha-redesign
>            Reporter: Alexander Kolbasov
>            Assignee: Alexander Kolbasov
>
> SentryStore.openTransaction() is synchronized for no reason - the peristence manager factory is thread-safe. 
> The synchronization here doesn't make any sense at all:
> {code}
>   /**
>    * Synchronized due to sequence id generation
>    */
>   public synchronized CommitContext commitUpdateTransaction(PersistenceManager pm) {
>     commitTransaction(pm);
>     return new CommitContext(SERVER_UUID, incrementGetSequenceId());
>   }
>   /**
>    * Increments commitSequenceId which should not be modified outside
>    * this method.
>    *
>    * @return sequence id
>    */
>   private synchronized long incrementGetSequenceId() {
>     return ++commitSequenceId;
>   }
> {code}
> Note that incrementGetSequenceId() is synchronized so there is no need to synchronize commitUpdateTransaction(). More over, there is no need to synchronize incrementGetSequenceId(), it can just use atomic for the index. And I think that handling of this atomic should be moved to the CommitContext instead.



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