source: other-projects/hathitrust/solr-extracted-features/trunk/src/main/java/org/hathitrust/PrepareForIngest.java@ 30918

package org.hathitrust;

import java.io.IOException;
import java.io.Serializable;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;

import org.apache.commons.cli.*;

import org.apache.spark.api.java.*;
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.function.Function;

public class PrepareForIngest implements Serializable
{
    private static final long serialVersionUID = 1L;

/*
    class ContainsA implements Function<String, Boolean> {
        
        private static final long serialVersionUID = 1L;

        public Boolean call(String s) { return s.contains("a"); }
    }

    class ConvertJSON implements Function<String, Boolean> {

        private static final long serialVersionUID = 1L;

        public Boolean call(String s) { return s.contains("a"); }
    }
*/

    //protected int _num_cores;
    protected String _input_dir;
    protected String _json_list_filename;
    protected String _output_dir;
    
    public PrepareForIngest(String input_dir, String json_list_filename, String output_dir)
    {
        //_num_cores = num_cores;
        _input_dir = input_dir;
        _json_list_filename = (json_list_filename != null) ? json_list_filename : input_dir;
        _output_dir = output_dir;
    }

    public void exec()
    {   
        SparkConf conf = new SparkConf().setAppName("HTRC-EF: Prepare for Solr Ingest");
        JavaSparkContext sc = new JavaSparkContext(conf);

        JavaRDD<String> json_list_data = sc.textFile(_json_list_filename).cache();

        JavaRDD<String> json_ids = json_list_data.flatMap(new PagedJSON(_input_dir));
        

        //long numAs = json_list_data.filter(new ContainsA()).count();

    
/*
        long numBs = json_list_data.filter(new Function<String, Boolean>() {
            public Boolean call(String s) { return s.contains("b"); }
        }).count();

        System.out.println("####**** Lines with a: " + numAs + ", lines with b: " + numBs);
    */
        long num_ids = json_ids.count();
        System.out.println("####**** number of IDS: " + num_ids);
        
        sc.close();
    }

    public static void main(String[] args) {


        Options options = new Options();

        //.withType(Integer.class)

        options.addOption(OptionBuilder.withLongOpt("json-filelist")
                .withDescription("Explicit list of JSON files to read in")
                .hasArg()
                .withArgName("f")
                .isRequired(false)
                .create());

        //Option num_cores_opt = new Option("n", "num-cores", true, "Number of cores to use");
        //num_cores_opt.setRequired(false);
        //options.addOption(num_cores_opt);

        //CommandLineParser parser = new DefaultParser(); // 1.3 and above
        CommandLineParser parser = new GnuParser();
        HelpFormatter formatter = new HelpFormatter();
        CommandLine cmd;

        try {
            cmd = parser.parse(options, args);
        }
        catch (ParseException e) {
            System.err.println(e.getMessage());
            System.err.println("Usage: RUN.bat [options] input-dir output-dir");
            formatter.printHelp("utility-name", options);
            //System.err.println("  Where 'filename.txt' contains a list of JSON files, one per line,");
            //System.err.println("  which use the HathiTrust Extracted Feature JSON format");

            System.exit(1);
            return;
        }

        //value = ((Integer)cmdLine.getParsedOptionValue("num-cores")).intValue();
        //value = ((Integer)cmdLine.getOptionValue("num-cores","2")).intValue();

        //cmd.hasOption("json-filelist")
        String json_list_filename = cmd.getOptionValue("json-filelist");
        //int num_cores = Integer.parseInt(num_cores_str);

        //System.out.println(inputFilePath);
        //System.out.println(outputFilePath);



        String[] filtered_args = cmd.getArgs();
        
        if (filtered_args.length != 2) {
                System.err.println("Usage: RUN.bat [options] input-dir output-dir");
            formatter.printHelp("utility-name", options);

            //System.err.println("Usage: RUN.bat [options] input-dir output-dir");
            //System.err.println("  Where 'filename.txt' contains a list of JSON files, one per line,");
            //System.err.println("  which use the HathiTrust Extracted Feature JSON format");
            System.exit(1);
        }
        String input_dir  = filtered_args[0];
        String output_dir = filtered_args[1];
        

        //String json_list_filename = cmd.getArgs()[0]; // args[0];
        //String json_list_filename = args[0];
        //int num_cores = 2;

        PrepareForIngest prep_for_ingest = new PrepareForIngest(input_dir,json_list_filename,output_dir);
        prep_for_ingest.exec();

    }
}