I actually talked about this approach with a colleague just last night. We are using a singleton for our daoManager so this would work perfectly, I think. I'll try it out and let you know.
On 5/4/05, Clinton Begin <[EMAIL PROTECTED]> wrote: > Oops....forgot to mention another pattern... > > One thing you can do is have a BatchDAO which basically just defines two > methods: startBatch and endBatch. Then you could do: > > daoManager.startTransaction() > batchDao.startBatch() > someDao.insert() > someOtherDao.update() > anotherDao.delete() > batchDao.endBatch() > daoManager.commitTransaction() > > That would give you the flexibility of batching in some cases, but not all. > You could even delegate the call to daoManager.startTransaction() and > batchDao.startBatch() to a base service method, so you wouldn't always have > to call both. I typically put such methods in around advice or just a > simple dynamic proxy at my service layer. > > Cheers, > Clinton > > > On 5/4/05, Clinton Begin <[EMAIL PROTECTED]> wrote: > > > > That is actually an option. I thought about adding that in 2.0, and IIRC > it wouldn't be hard to add. > > > > Of course, you'd have to live with the challenges of what basically > amounts to a write cache. That is, in this scenario: > > > > start TX > > insert into PEOPLE > > select from PEOPLE > > end TX > > select from PEOPLE > > > > ...the result of the first insert would not be seen by the first select, > but would be seen by the second. > > > > Cheers, > > Clinton > > > > > > > > On 5/4/05, Gregg D Bolinger < [EMAIL PROTECTED]> wrote: > > > Well, my approach won't work. You can't get to the startBatch from > > > the service. DaoManager only handles transactions. SqlMpa handles > > > batching. So the batches have to be done in the DAO which makes it > > > impossible to batch more than one DAO. > > > > > > What would be nice is if iBatis just batched transactions by default. > > > > > > On 5/4/05, Clinton Begin < [EMAIL PROTECTED]> wrote: > > > > > > > > Your approach sounds good. I wouldn't try to overcomplicate this. > > > > > > > > Cheers, > > > > Clinton > > > > > > > > > > > > On 5/2/05, Gregg D Bolinger <[EMAIL PROTECTED] > wrote: > > > > > I am using iBatis SqlMap and iBatis DAO. I am trying to look into > > > > > doing batch inserts/updates/delete within a single transaction for > > > > > multiple DAO's. So should I create a Service that just handles my > > > > > batches and has an instance of each DAO that it needs, or is there a > > > > > different way? Anyone have any tips or hints on doing this? > > > > > > > > > > Thanks. > > > > > > > > > > > > > > > > > > > > > > > > >
