com.google.appengine.tools.mapreduce.RangeInputSplit.java Source code

Introduction

Here is the source code for com.google.appengine.tools.mapreduce.RangeInputSplit.java

Source

/*
 * Copyright 2010 Google Inc.
 *
 * Licensed 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 com.google.appengine.tools.mapreduce;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapreduce.InputSplit;

/**
 * The input split class for {@link RangeInputFormat}.
 *
 * The inputs generated by this split are inclusive of start and exclusive of
 * end (i.e. [start, end) ).
 *
 */
public class RangeInputSplit extends InputSplit implements Writable {
    private long splitStart;
    private long splitEnd;

    public RangeInputSplit() {
    }

    public RangeInputSplit(long start, long end) {
        splitStart = start;
        splitEnd = end;
    }

    @Override
    public long getLength() throws IOException, InterruptedException {
        return splitEnd - splitStart;
    }

    @Override
    public String[] getLocations() throws IOException, InterruptedException {
        return null;
    }

    @Override
    public void readFields(DataInput input) throws IOException {
        splitStart = input.readLong();
        splitEnd = input.readLong();
    }

    @Override
    public void write(DataOutput output) throws IOException {
        output.writeLong(splitStart);
        output.writeLong(splitEnd);
    }

    public long getSplitStart() {
        return splitStart;
    }

    public long getSplitEnd() {
        return splitEnd;
    }
}