Grails - Checking which beans are available and how are they configured

GrailsCheckBeanConfigurationAtRuntime.groovy

def grailsApplication // Injected by default in controllers, accessible as a regular bean elsewhere

assert grailsApplication.mainContext.getBeanDefinition('sessionFactory') instanceof org.springframework.beans.factory.support.GenericBeanDefinition

// Have I any non-singleton bean ? 
grailsApplication.mainContext.getBeanDefinitionNames().any {
  !grailsApplication.mainContext.getBeanDefinition(it).singleton
}

This code can be used in a controller or service, or for example using the Console plugin.