tierConfigVersion = 2
)

// tierConfigPath refers to remote tier config object name
var tierConfigPath = path.Join(minioConfigPrefix, tierConfigFile)

const tierCfgRefreshAtHdr = "X-MinIO-TierCfg-RefreshedAt"

// TierConfigMgr holds the collection of remote tiers configured in this deployment.
type TierConfigMgr struct {
	sync.RWMutex `msg:"-"`
	drivercache  map[string]WarmBackend `msg:"-"`

			ctx, cancel := context.WithTimeout(ctx, ds.Timeouts.RefreshCall)
			defer cancel()

			refreshed, err := c.Refresh(ctx, args)
			if err != nil {
				ch <- refreshResult{offline: true}
				log("dsync: Unable to call Refresh failed with %s for %#v at %s\n", err, args, c)
			} else {
				ch <- refreshResult{refreshed: refreshed}
				log("dsync: Refresh returned false for %#v at %s\n", args, c)
			}
		}(index, c)
	}

// GetConfig returns a specific configuration from the bucket metadata.
// The returned object may not be modified.
// reloaded will be true if metadata refreshed from disk
func (sys *BucketMetadataSys) GetConfig(ctx context.Context, bucket string) (meta BucketMetadata, reloaded bool, err error) {
	objAPI := newObjectLayerFn()
	if objAPI == nil {

        }
    }

    /**
     * Test cache refresh mechanism with concurrent access.
     * Verifies that cache is refreshed correctly even with concurrent readers.
     */
    @Test
    public void test_cacheRefresh_withConcurrentReads() throws Exception {
        final int[] loadCount = { 0 };

        fessLoginAssist.getSavedUserBean().ifPresent(u -> {
            final boolean result = u.getFessUser().refresh();
            if (logger.isDebugEnabled()) {
                logger.debug("Refreshed user info: result={}", result);
            }
        });
        return viewHelper.getActionHook().godHandPrologue(runtime, super::godHandPrologue);
    }

    /**

			idx++
			continue
		}
		reply = true
		l.removeEntry(resource, dsync.LockArgs{UID: args.UID}, &lris)
		idx++
	}
}

func (l *localLocker) Refresh(ctx context.Context, args dsync.LockArgs) (refreshed bool, err error) {
	if ctx.Err() != nil {
		return false, ctx.Err()
	}

	defer l.getMutex()()
	if ctx.Err() != nil {
		return false, ctx.Err()
	}

	// Check whether uid is still active.

		}
		return nil
	}
}

// MetricsGroup - represents a group of metrics. It includes a `MetricsLoaderFn`
// function that provides a way to load the metrics from the system. The metrics
// are cached and refreshed after a given timeout.
//
// For metrics with a `bucket` dimension, a list of buckets argument is required
// to collect the metrics.
//
// It implements the prometheus.Collector interface for metric groups without a

    }

    /**
     * Refreshes the design JSP files for all virtual hosts.
     *
     * @return A list of paths to the refreshed files.
     */
    public List<Path> refreshDesignJspFiles() {
        final List<Path> fileList = new ArrayList<>();
        stream(ComponentUtil.getVirtualHostHelper().getVirtualHostPaths())