Can I configure Grails with no datasource?
I have a Grails app that loads its data from xml files and delivers rss feeds via rome. I don't have any domain classes and my app has no datasource. I don't want Grails to load an in memory hsql db when the application has no need for it. Deleting the DataSource.groovy file prevents me from launching the web app, it seems as though the datasource is required, but is there anything I can do if my application doesn't need a datasource?
Answer
The following steps work for a new app (Grails 1.1.1) to run without using a datasource:
grails create-app nodb
cd nodb
grails uninstall-plugin hibernate
rm grails-app/conf/DataSource.groovy
grails create-controller Foo
<add "render "hi bar" to the index closure of ./grails-app/controllers/FooController.groovy>
grails run-app
http://localhost:8080/nodb/foo - prints hi bar
For an existing app on at least version 1.1 (think that's when hibernate was made a plugin) you should be able to just uninstall-plugin and delete the DataSource.groovy file.