(Quick Reference)

4.2.2 Customizing the Application Class

Version: 4.0.2

4.2.2 Customizing the Application Class

There are several ways in which you can customize the Application class.

Customizing Scanning

By default Grails will scan all known source directories for controllers, domain class etc., however if there are packages in other JAR files you wish to scan you can do so by overriding the packageNames() method of the Application class:

class Application extends GrailsAutoConfiguration {
    @Override
    Collection<String> packageNames() {
        super.packageNames() + ['my.additional.package']
    }

    ...
}

Registering Additional Beans

The Application class can also be used as a source for Spring bean definitions, simply define a method annotated with the Bean and the returned object will become a Spring bean. The name of the method is used as the bean name:

class Application extends GrailsAutoConfiguration {
    @Bean
    MyType myBean() {
        return new MyType()
    }

    ...
}