[OPTIONAL] Add support to log warnings about the use of certain Annotations (e.g. @Indexed) in the absence of the enabling Annotation (e.g. @EnableIndexing). about spring-boot-data-geode

[jxblum]

Of course, if users want to incur the penalty, infrastructure components could be added in SBDG to necessarily scan all the application class types. This might be useful at development time in order to ensure proper behavior of the application at runtime, in production, such as, "we indexed one or more application domain model object(s) properties with @Indexed and we want to make sure our Spring configuration enabled indexing with the @EnableIndexing annotation."

Additional configuration properties used by the supporting infrastructure components could be defined so that the scan could be further limited.

Still, the use of such a feature should be carefully considered since there would be both a 1) resource (memory) penalty in addition to 2) a startup time penalty.

At any rate, further and careful consideration for such a feature in SBDG is needed.