dnet-hadoop/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/graph/SparkGraphImporterJob.java

package eu.dnetlib.dhp.graph;


import eu.dnetlib.dhp.schema.oaf.Oaf;
import eu.dnetlib.dhp.schema.oaf.Publication;
import org.apache.hadoop.io.Text;
import org.apache.spark.api.java.JavaRDD;
import org.apache.spark.api.java.JavaSparkContext;
import org.apache.spark.api.java.function.PairFunction;
import org.apache.spark.sql.SparkSession;
import scala.Tuple2;

public class SparkGraphImporterJob {


    public static void main(String[] args) throws Exception{

        //TODO add argument parser
//        final ArgumentApplicationParser parser = new ArgumentApplicationParser(IOUtils.toString(SparkGraphImporterJob.class.getResourceAsStream("/eu/dnetlib/dhp/graph/graph_importer_parameters.json")));
//        parser.parseArgument(args);

        final SparkSession spark = SparkSession
                .builder()
                .appName("ImportGraph")
                //TODO replace with: master(parser.get("master"))
                .master("local[16]")
                .getOrCreate();


        final JavaSparkContext sc = new JavaSparkContext(spark.sparkContext());


        final JavaRDD<Tuple2<String, String>> inputRDD = sc.sequenceFile("file:///home/sandro/part-m-00000", Text.class, Text.class).map(item -> new Tuple2<>(item._1.toString(), item._2.toString()));

        Tuple2<String, String> item = inputRDD
                .filter(s -> s._1().split("@")[2].equalsIgnoreCase("body"))
                .first();

        System.out.println(item._1());
        System.out.println(item._2());


//                .map(Tuple2::_2)
//                .map(ProtoConverter::convert)
//                .mapToPair((PairFunction<Oaf, String,Integer>) s-> new Tuple2<String, Integer>(s.getClass().getName(),1))
//                .reduceByKey(Integer::sum).collect().forEach(System.out::println);
//
//
//                .filter(s -> s instanceof Publication)
//                .count();




    }
}