How to get data from another data base in runtime

问题

I need an optimal way to change Database in run-time, whether from hibernate or from JNDI or another. I need to change the database when a user clicks on a specific button (Change dependencies on events).

回答1:

If you are running Grails 1.3.x you can to use the Burt Beckwith's Datasources plugin, in Grails 2.x that feature has been added to core.

Then you can to use a parameter to pass database connection name

def database = params.database
if(!database) database = "default"

and to use Groovy dynamic method invocation to call it

def zipCode = ZipCode.'${database}'.get(42)
…
zipCode.'${database}'.save()

来源：https://stackoverflow.com/questions/12235656/how-to-get-data-from-another-data-base-in-runtime