Based on a discussion started at the mailing list, it would be great if service properties could be specified in an external configuration file, probably using a DSL.
Currently it's possible to build your own "service config injector" by relying on application events. Say for example you have a service defined like so
You could define configuration for this service in Config.groovy like this
Injecting this value is done using an application event handler registered for NewInstance, typically in Events.groovy