[jboss-jira] [JBoss JIRA] Assigned: (JBAS-1402) Transaction Recovery

[Dimitris Andreadis (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBAS-1402?page=all ]

Dimitris Andreadis reassigned JBAS-1402:
----------------------------------------

    Assignee: Adrian Brock

Adrian, can we close this whole task & subtasks out-of-date, or do we keep the JCA tasks as still current?

> Transaction Recovery
> --------------------
>
>                 Key: JBAS-1402
>                 URL: http://jira.jboss.com/jira/browse/JBAS-1402
>             Project: JBoss Application Server
>          Issue Type: Task
>      Security Level: Public(Everyone can see) 
>          Components: Transaction Manager
>    Affects Versions: JBossAS-4.0.1 Final
>            Reporter: Adrian Brock
>         Assigned To: Adrian Brock
>
> Implement optional transaction recovery
> The simplest mechanism is to do this is with a local database
> using the last resource gambit where during its "prepare" it logs the XID in a table.
> If this last resource fails to commit, recovery will not find the transaction
> in the table which means it will rollback the whole transaction.
> This has limitations where a different local resource is required within the transaction
> but not this local database used as the recovery log.
> Another implementation is a local file. Though more complicated it should give superior
> performance. 
> But, it does not work well with the last resource gambit, e.g. you cannot tell
> whether the jdbc commit() suceeded or failed if it crashes just at the point of this invocation
> before the result is returned from the db.
> The other work required:
> 1) Possibly, simplify the dependencies in the JCA module so we can run the recovery earlier.
> Currently the RARs need the transaction manager at deployment time. The
> recovery service needs to be an external service depending upon both the
> tm and the managed connection factories.
> At least this will require a GUID for the XID so we can avoid duplicates between
> unrecovered XIDs and any new XIDs created before recovery is complete.
> 2) JBossMQ needs to implement XAResource.recover()

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