[ http://issues.apache.org/jira/browse/IBATIS-100?page=history ]
Brandon Goodin closed IBATIS-100:
---------------------------------
Resolution: Invalid
This is a support question that should be posted to the user list.
> Ability to "integrate" data from multiple data sources at the DAO layer
> -----------------------------------------------------------------------
>
> Key: IBATIS-100
> URL: http://issues.apache.org/jira/browse/IBATIS-100
> Project: iBatis for Java
> Type: New Feature
> Components: DAO
> Environment: All
> Reporter: Greg Akins
> Priority: Minor
>
> I'm reading data from 3 different databases.
>
> Most of the time, I read from a single database, and write to another... So
> nothing is "complicated" in Ibatis.
>
> However, sometimes I have to read from database "A" while getting lookup data
> from database "B"
>
> Initially, I wrote a translation method that would get an object with ID's..
> Lookup each ID in database "B" and copy the data with Object references
> instead of ID fields to my application
>
> Now, thanks to Nathan, I am using a CustomTypeHandler to get "lookup" values
> where I didn't feel like putting the data in the database at all (using
> type-safe enumerators).
>
> It seems like maybe CustomerTypeHandlers would have been appropriate for
> integrating multiple datasource, much like integrating datasources with
> enumerators; Does that seem like a bad idea? Something smells funny about
> creating dependencies between the persistence and DAO's in this manner?
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