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.server.datanode.fsdataset;
019
020import java.io.Closeable;
021import java.io.FileDescriptor;
022import java.io.FileInputStream;
023import java.io.InputStream;
024
025import org.apache.hadoop.io.IOUtils;
026
027/**
028 * Contains the input streams for the data and checksum of a replica.
029 */
030public class ReplicaInputStreams implements Closeable {
031  private final InputStream dataIn;
032  private final InputStream checksumIn;
033
034  /** Create an object with a data input stream and a checksum input stream. */
035  public ReplicaInputStreams(FileDescriptor dataFd, FileDescriptor checksumFd) {
036    this.dataIn = new FileInputStream(dataFd);
037    this.checksumIn = new FileInputStream(checksumFd);
038  }
039
040  /** @return the data input stream. */
041  public InputStream getDataIn() {
042    return dataIn;
043  }
044
045  /** @return the checksum input stream. */
046  public InputStream getChecksumIn() {
047    return checksumIn;
048  }
049
050  @Override
051  public void close() {
052    IOUtils.closeStream(dataIn);
053    IOUtils.closeStream(checksumIn);
054  }
055}