Convert2JavaProps is a FileHandler it convert the yaml content into java props.

if string like ${NAME||archaius} will query environment variable for ${NAME} if environment variable is "" return default string `archaius` support multi variable, eg: value string => addr:${IP||127.0.0.1}:${PORT||8080} if environment variable => IP=0.0.0.0 PORT=443 , result => addr:0.0.0.0:443 if no exist environment variable , result => addr:127.0.0.1:8080.

UseFileNameAsKeyContentAsValue is a FileHandler, it sets the yaml file name as key and the content as value.

FileHandler decide how to convert a file content into key values archaius will manage file content as those key values.