Time for action – creating the source code

We'll now see the source code to implement our graph traversal. Because the code is lengthy, we'll break it into multiple steps; obviously they should all be together in a single source file.

  1. Create the following as GraphPath.java with these imports:
    import java.io.* ;
    import org.apache.hadoop.conf.Configuration;
    import org.apache.hadoop.fs.Path;
    import org.apache.hadoop.io.Text;
    import org.apache.hadoop.mapreduce.Job;
    import org.apache.hadoop.mapreduce.*;
    import org.apache.hadoop.mapreduce.lib.input.*;
    import org.apache.hadoop.mapreduce.lib.output.*;
    public class GraphPath
  2. Create an inner class to hold an object-oriented representation of a node:
    // Inner class to represent a node public static class Node ...

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