com.dlyle.testh20.H2OTest.java Source code

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Here is the source code for com.dlyle.testh20.H2OTest.java

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package com.dlyle.testh20;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import water.H2O;
import water.H2OApp;

public class H2OTest extends Configured implements Tool {

    public static class H2OMapper extends Mapper<Object, Text, Text, Text> {

        @Override
        public void run(Context context) throws IOException, InterruptedException {
            String runid = "H2o_" + context.getUser() + '_' + System.currentTimeMillis();

            if (!"false".equals(context.getConfiguration().get("h2o.start", "false"))) {
                String flowDir = context.getConfiguration().get("mapreduce.cluster.local.dir");
                context.getCounter("Test: ", flowDir).setValue(1);
                H2OApp.main(new String[] { "-name", runid, "-flow_dir", flowDir });
                if (!"false".equals(context.getConfiguration().get("h2o.stop", "false"))) {
                    context.getCounter("Test: ", H2O.getIpPortString()).setValue(1);
                    H2O.shutdown(0);
                }
            }

        }

    }

    public static void main(String[] args) throws Exception {
        int res = ToolRunner.run(new Configuration(), new H2OTest(), args);
        System.exit(res);
    }

    @Override
    public int run(String[] args) throws Exception {
        Configuration conf = this.getConf();
        Job job = Job.getInstance(conf, "H2O Test");
        job.setJarByClass(H2OTest.class);
        job.setMapperClass(H2OMapper.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(Text.class);
        FileInputFormat.addInputPath(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));
        return job.waitForCompletion(true) ? 0 : 1;
    }

}