[jboss-jira] [JBoss JIRA] Commented: (JBCACHE-793) hibernate-recommended-config.xml incorrectly specifies INVALIDATION_SYNC

[Brian Stansberry (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBCACHE-793?page=comments#action_12344667 ] 
            
Brian Stansberry commented on JBCACHE-793:
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I'm not sure I understand the question, but that's never stopped me trying to answer ;)

If JBC is managing the versions, the invalidation message carries no version; on the recipient the node is just removed (or just its data if it has chidren).

If the caller is managing the versions, the invalidation message carries the originator's version.  This is compared to the version on the message recipient; if the recipient version is older or the same the node is removed (or just its data if it has children).  If the recipient version is newer a CacheException is thrown, which only propagates back to the caller if INVALIDATE_SYNC is used.

When the recipient removes the node/node-data, the version stored in the node is lost. If there was a version in the invalidation message, that of course is lost too when the method returns.  So, I guess in that sense the recipient "forgets" the invalidation's version number.

> hibernate-recommended-config.xml incorrectly specifies INVALIDATION_SYNC
> ------------------------------------------------------------------------
>
>                 Key: JBCACHE-793
>                 URL: http://jira.jboss.com/jira/browse/JBCACHE-793
>             Project: JBoss Cache
>          Issue Type: Task
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 1.4.0.SP1, 1.4.0
>            Reporter: Brian Stansberry
>         Assigned To: Manik Surtani
>             Fix For: 1.4.0.SP2, 2.0.0
>
>
> Steve Ebersole has indicated that use of invalidation is inappropriate for the Hibernate 2nd level cache use case, so we shouldn't recommend it.

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