branch-2.0.4-alpha/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/ReplicaOutputStreams.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
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.hdfs.server.datanode.fsdataset;

import java.io.Closeable;
import java.io.OutputStream;

import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.util.DataChecksum;

/**
 * Contains the output streams for the data and checksum of a replica.
 */
public class ReplicaOutputStreams implements Closeable {
  private final OutputStream dataOut;
  private final OutputStream checksumOut;
  private final DataChecksum checksum;

  /**
   * Create an object with a data output stream, a checksum output stream
   * and a checksum.
   */
  public ReplicaOutputStreams(OutputStream dataOut, OutputStream checksumOut,
      DataChecksum checksum) {
    this.dataOut = dataOut;
    this.checksumOut = checksumOut;
    this.checksum = checksum;
  }

  /** @return the data output stream. */
  public OutputStream getDataOut() {
    return dataOut;
  }

  /** @return the checksum output stream. */
  public OutputStream getChecksumOut() {
    return checksumOut;
  }

  /** @return the checksum. */
  public DataChecksum getChecksum() {
    return checksum;
  }

  @Override
  public void close() {
    IOUtils.closeStream(dataOut);
    IOUtils.closeStream(checksumOut);
  }
}