Env Properties
Older Spring code that might need porting to AWS will need a mechanism to read properties files from some place other than the classpath or the file system.
This is a demonstration of using a Spring factory bean to create a properties file from some other source (SSM) but satisfy downstream dependencies for a java util properties object.
The switch is done upstream of the bean instantiation, so the downstream code will not have to change. The only thing that changes is the SOURCE of Spring property substitutions in the context file.