Grails, storing app own settings (singleton domain class?)

Question

I'm developing an app using Grails and there are some app-wide configuration settings I'd like to store somewhere. The only way I've thought of is to create a domain class that stores the configuration values, and to use a service that queries that domain class. The problem I see is that there should be just one instance of that domain class, but I haven't found anything to enforce that restriction.

There may be other best practices to store app's own configuration that I may not be aware of, all suggestions are welcome.

Edit: the settings are supposed to be configurable from within the app.

Answer 1

There is a plugin for that: Settings. It allows you to create named setting like my.own.x of different types (String, date, BigDecimal and integer), and provides you with the basic CRUD pages to manage them.

You can access the settings from either gsp:

<g:setting valueFor="my.own.x" default="50" encodeAs="HTML"/> 

or controllers/services/domains

Setting.valueFor("my.own.x", 50)

I use it in several projects and think it works great.