content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.worker.block.meta;
  
  /**
   * This class is a wrapper of {@link StorageDir} to provide more limited access for allocators.
   */
  public class StorageDirAllocatorView extends StorageDirView {
  
    /**
     * Creates a {@link StorageDirAllocatorView} using the actual {@link StorageDir}.
     *
     * @param dir which the dirView is constructed from
     * @param tierView which the dirView is under
     */
    public StorageDirAllocatorView(StorageDir dir, StorageTierView tierView) {
      super(dir, tierView);
    }
  
    @Override
    public long getAvailableBytes() {
      long reservedBytes = mDir.getReservedBytes();
      long availableBytes = mDir.getAvailableBytes();
      long capacityBytes = mDir.getCapacityBytes();
      if (mTierView.mUseReservedSpace) {
        return capacityBytes - mDir.getCommittedBytes();
      } else {
        return availableBytes;
      }
    }
  }
  