hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/WindowsGetSpaceUsed.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.fs;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;

import java.io.IOException;

/**
 * Class to tell the size of a path on windows.
 * Rather than shelling out, on windows this uses DUHelper.getFolderUsage
 */
@InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
@InterfaceStability.Evolving
public class WindowsGetSpaceUsed extends CachingGetSpaceUsed {

  public WindowsGetSpaceUsed(CachingGetSpaceUsed.Builder builder)
      throws IOException {
    super(builder.getPath(),
        builder.getInterval(),
        builder.getJitter(),
        builder.getInitialUsed());
  }

  /**
   * Override to hook in DUHelper class.
   */
  @Override
  protected void refresh() {
    used.set(DUHelper.getFolderUsage(getDirPath()));
  }
}