question: @ PreAuthorize ( SpringEvalExpressions . HAS_AUTH_SYSTEM_ADMIN ) @ Override public ResponseEntity < Collection < String > > invalidateCaches ( ) { final Collection < String > cacheNames = cacheManager . getCacheNames ( ) ; LOGGER . info ( "Invalidating caches {}" , cacheNames ) ; cacheNames . forEach ( null ) ; return ResponseEntity . ok ( cacheNames ) ; }
target:  Invalidates all caches for all tenants.