}
}

// Set - sets a new metadata in-memory.
// Only a shallow copy is saved and fields with references
// cannot be modified without causing a race condition,
// so they should be replaced atomically and not appended to, etc.
// Data is not persisted to disk.
func (sys *BucketMetadataSys) Set(bucket string, meta BucketMetadata) {
	if !isMinioMetaBucketName(bucket) {
		sys.Lock()
		sys.metadataMap[bucket] = meta

       * This lock is used to ensure safe and correct cancellation, it ensures that a new task is
       * not scheduled while a cancel is ongoing. Also it protects the currentFuture variable to
       * ensure that it is assigned atomically with being scheduled.
       */
      private final ReentrantLock lock = new ReentrantLock();

      /** The future that represents the next execution of this task. */
      @GuardedBy("lock")
      @CheckForNull

	BucketTargetsConfigUpdatedAt     time.Time
	BucketTargetsConfigMetaUpdatedAt time.Time
	// Add a new UpdatedAt field and update lastUpdate function

	// Unexported fields. Must be updated atomically.
	policyConfig           *policy.BucketPolicy
	notificationConfig     *event.Config
	lifecycleConfig        *lifecycle.Lifecycle
	objectLockConfig       *objectlock.Config
	versioningConfig       *versioning.Versioning

		Volume:   volume,
		FilePath: path,
		FI:       fi,
	})
	if err != nil {
		return nil, err
	}
	return resp, nil
}

// RenameData - rename source path to destination path atomically, metadata and data file.
func (client *storageRESTClient) RenameData(ctx context.Context, srcVolume, srcPath string, fi FileInfo,
	dstVolume, dstPath string, opts RenameOptions,
) (res RenameDataResp, err error) {

		es.stats.workers.Add(1)
	}

	for len(workers) > n {
		worker := workers[len(workers)-1]
		workers = workers[:len(workers)-1]
		worker <- expiryOp(nil)
		es.stats.workers.Add(-1)
	}
	// Atomically replace workers.
	es.workers.Store(&workers)
}

// Worker handles 4 types of expiration tasks.
// 1. Expiry of objects, includes regular and transitioned objects

}

func skipAccessChecks(volume string) (ok bool) {
	return strings.HasPrefix(volume, minioMetaBucket)
}

// RenameData - rename source path to destination path atomically, metadata and data directory.
func (s *xlStorage) RenameData(ctx context.Context, srcVolume, srcPath string, fi FileInfo, dstVolume, dstPath string, opts RenameOptions) (res RenameDataResp, err error) {
	defer func() {

  }

  Supplier<? extends StatsCounter> getStatsCounterSupplier() {
    return statsCounterSupplier;
  }

  /**
   * Builds a cache, which either returns an already-loaded value for a given key or atomically
   * computes or retrieves it using the supplied {@code CacheLoader}. If another thread is currently
   * loading the value for this key, simply waits for that thread to finish and returns its loaded

     */
    @CanIgnoreReturnValue
    public Builder<K, V> put(K key, V value) {
      ensureCapacity(size + 1);
      Entry<K, V> entry = entryOf(key, value);
      // don't inline this: we want to fail atomically if key or value is null
      entries[size++] = entry;
      return this;
    }

    /**
     * Adds the given {@code entry} to the map, making it immutable if necessary. If the same key is

  }

  Supplier<? extends StatsCounter> getStatsCounterSupplier() {
    return statsCounterSupplier;
  }

  /**
   * Builds a cache, which either returns an already-loaded value for a given key or atomically
   * computes or retrieves it using the supplied {@code CacheLoader}. If another thread is currently
   * loading the value for this key, simply waits for that thread to finish and returns its loaded

			}
		case <-p.mrfWorkerKillCh:
			return
		}
	}
}

// AddWorker adds a replication worker to the pool.
// An optional pointer to a tracker that will be atomically
// incremented when operations are running can be provided.
func (p *ReplicationPool) AddWorker(input <-chan ReplicationWorkerOperation, opTracker *int32) {
	for {
		select {
		case <-p.ctx.Done():
			return