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     */
018    package org.apache.hadoop.hdfs.server.datanode.fsdataset;
019    
020    import java.io.Closeable;
021    import java.io.OutputStream;
022    
023    import org.apache.hadoop.io.IOUtils;
024    import org.apache.hadoop.util.DataChecksum;
025    
026    /**
027     * Contains the output streams for the data and checksum of a replica.
028     */
029    public class ReplicaOutputStreams implements Closeable {
030      private final OutputStream dataOut;
031      private final OutputStream checksumOut;
032      private final DataChecksum checksum;
033    
034      /**
035       * Create an object with a data output stream, a checksum output stream
036       * and a checksum.
037       */
038      public ReplicaOutputStreams(OutputStream dataOut, OutputStream checksumOut,
039          DataChecksum checksum) {
040        this.dataOut = dataOut;
041        this.checksumOut = checksumOut;
042        this.checksum = checksum;
043      }
044    
045      /** @return the data output stream. */
046      public OutputStream getDataOut() {
047        return dataOut;
048      }
049    
050      /** @return the checksum output stream. */
051      public OutputStream getChecksumOut() {
052        return checksumOut;
053      }
054    
055      /** @return the checksum. */
056      public DataChecksum getChecksum() {
057        return checksum;
058      }
059    
060      @Override
061      public void close() {
062        IOUtils.closeStream(dataOut);
063        IOUtils.closeStream(checksumOut);
064      }
065    }