[jboss-jira] [JBoss JIRA] Commented: (JBCACHE-848) Implement putFromExternalRead()

[Manik Surtani (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBCACHE-848?page=comments#action_12356297 ] 
            
Manik Surtani commented on JBCACHE-848:
---------------------------------------

Following the call we had with the HIbernate folk on 26 FEB 2007, here are the salient points wrt. putForExternalRead (PFER)

- PFER only goes through if node does not exist; no-op otherwise
- Force asynchronous mode for replication or invalidation to prevent any blocking
- 0ms lock timeout to prevent any blocking here either.  If this fails, PFER is a no-op
- no to separate thread necessary, since we will be operating with a 0ms timeout, async replication and a no-op if the node exists.  The only real chance of any blocking here is JGroups FC which is considered small enough a case.

Existing points which still are valid from the wiki link above:

    *  Suspend all ongoing TXs.
    * Quieter logging. Errors and the like that would otherwise raise alarm bells should be suppressed since this is a non-critical call.

This serves as a "spec" for PFER and the basis for unit tests.


> Implement putFromExternalRead()
> -------------------------------
>
>                 Key: JBCACHE-848
>                 URL: http://jira.jboss.com/jira/browse/JBCACHE-848
>             Project: JBoss Cache
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>            Reporter: Manik Surtani
>         Assigned To: Manik Surtani
>             Fix For: 2.0.0.GA, 2.0.0.BETA2
>
>
> This is to supercede putFailFast() in JBC 1.x as well as the Option.FAIL_SILENTLY option, for Hibernate to use when doing a DB read and putting the contents into the cache.
> See forum link for details of this.

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