001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hdfs;
019
020import java.io.IOException;
021import java.util.EnumSet;
022import org.apache.hadoop.fs.CreateFlag;
023import org.apache.hadoop.hbase.io.asyncfs.AsyncFSOutput;
024import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
025import org.apache.hadoop.util.DataChecksum;
026import org.apache.yetus.audience.InterfaceAudience;
027
028/**
029 * A dummy DFSOutputStream which is mainly used for lease renewal.
030 * <p>
031 * We have to put it under this package as we want to override a package private method.
032 */
033@InterfaceAudience.Private
034public final class DummyDFSOutputStream extends DFSOutputStream {
035
036  private final AsyncFSOutput delegate;
037
038  public DummyDFSOutputStream(AsyncFSOutput output, DFSClient dfsClient, String src,
039    HdfsFileStatus stat, EnumSet<CreateFlag> flag, DataChecksum checksum) {
040    super(dfsClient, src, stat, flag, null, checksum, null, false);
041    this.delegate = output;
042  }
043
044  // public for testing
045  @Override
046  public void abort() throws IOException {
047    delegate.close();
048  }
049
050  @Override
051  public void close() throws IOException {
052    delegate.close();
053  }
054}