// DELETE
 @RequestMapping(method = RequestMethod.DELETE)
 @PreAuthorize(RoleConstants.HAS_ROLE_ADMIN)
 public void clearAll() {
   cacheService.clearAll();
 }
 @RequestMapping(value = "/{cache}", method = RequestMethod.DELETE)
 @PreAuthorize(RoleConstants.HAS_ROLE_ADMIN)
 public void clearOne(@PathVariable("cache") String cache) throws EntityNotFoundException {
   cacheService.clearOne(cache);
 }
 // GET
 @RequestMapping(method = RequestMethod.GET)
 @PreAuthorize(RoleConstants.HAS_ROLE_ADMIN)
 public Iterable<String> getAllCacheNames() {
   return cacheService.getAllCacheNames();
 }