This plugin will poll for changes to external configuration files (files added to grails.config.locations), reload the configuration when a change has occurred, and notify specified plugins by firing the onConfigChange event in each. This plugin, like reloadable config (http://www.grails.org/plugin/reloadable-config), has no dependencies but uses simple Java timers. However, unlike reloadable config, it is able to be fired at will and plugins can be notified of configuration changes.

Please note:...

Dependency :
compile ":external-config-reload:1.3.0"