FadvisedFileRegionWrapper.java example

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tajo-cdh-master
/**
 * 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.tajo.pullserver;

import org.apache.hadoop.io.ReadaheadPool;

import java.io.IOException;
import java.io.RandomAccessFile;

/* tajo is not yet supported on Windows */
public class FadvisedFileRegionWrapper extends org.apache.hadoop.mapred.FadvisedFileRegion {
  public static final int DEFAULT_SHUFFLE_BUFFER_SIZE = 128 * 1024;

  public FadvisedFileRegionWrapper(RandomAccessFile file, long position, long count,
                                   boolean manageOsCache, int readaheadLength, ReadaheadPool readaheadPool,
                                   String identifier) throws IOException {
    super(file, position, count, manageOsCache, readaheadLength, readaheadPool,
        identifier, DEFAULT_SHUFFLE_BUFFER_SIZE, true);
  }
}