FilePageCacheLockFree () { if (newFilePageCache == null) { if (LOCK_FREE_PAGE_CACHE_ENABLED) { throw new UnsupportedOperationException( "lock-free FilePageCache is not available in this storageLockContext." ); } throw new UnsupportedOperationException( "lock-free FilePageCache is not available: PageCacheUtils.ENABLE_LOCK_FREE_VFS=false." ); } return newFilePageCache; }