Hi,
Forgive me if I am talking nonsense, but doesn't it only make sense to have
transaction isolation per transaction???? I very much doubt you will find
a db that can support several transaction isolation levels within one
transaction. I can't quite figure out what it would mean, either. So I
say, put it with the transaction requirements for methods - Requires,
Requires New, etc. Then you can set the isolation each time you start a
new transaction, based on this specification.
david jencks
On 2001.06.26 14:48:00 -0400 Dain Sundstrom wrote:
> > |I added transaction isolation to the new cmp plugin. You can set it by
> > |adding the <transaction-isolation> element after the datasource
> element.
> > |Valid levels are:
> > | transaction-none
> > | transaction-read-committed
> > | transaction-read-uncommitted
> > | transaction-repeatable-read
> > | transaction-serializable
> > |
> > |Give me 10 minutes and I'll add it to JAWS...
> >
> > ok but these will be leveraged by new caches in JBoss 3.0
> >
> >
> >
> > so I would imagine that each application can set its own datasource
> > isolation level, (different kinds of bean). So it IS user configurable
> > right???
> >
> > Also how does it play with the datasources, if the datasource is shared
> > across applications and different tables support different locking
> policies
> > (say one table is RO the other RW) can the driver support sequential
> > "setIsolationLevel" that only applies to the record and or table
> touched?
> > marcf
> >
>
> Right now this the jaws and jbosscmp code only support datasource per
> application. When we implement datasource per bean, we can have
> isolation
> level per bean. This leads to the intresting situation with EJB-QL
> queries
> that thouch multiput beans. May be we need to specify an isolation lever
> for
> each query. Havn't thought about it much. Right now you can only set it
> for the entire ejb-jar.
>
> Just tell me when you get the cache stuff figgured out and I can update
> jaws
> and jbosscmp to support what ever you want.
>
> -dain
>
>
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