1 | package org.hathitrust;
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2 |
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3 | import java.io.Serializable;
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4 | import org.apache.commons.cli.*;
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5 |
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6 | import org.apache.spark.api.java.*;
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7 | import org.apache.spark.util.DoubleAccumulator;
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8 | import org.hathitrust.extractedfeatures.PagedJSON;
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9 | import org.apache.spark.SparkConf;
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10 |
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11 | public class PrepareForIngest implements Serializable
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12 | {
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13 | private static final long serialVersionUID = 1L;
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14 |
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15 | // Following details on number of partitions to use given in
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16 | // "Parallelized collections" section of:
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17 | // https://spark.apache.org/docs/2.0.1/programming-guide.html
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18 | //
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19 | // For a more detailed discussion see:
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20 | // http://blog.cloudera.com/blog/2015/03/how-to-tune-your-apache-spark-jobs-part-2/
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21 |
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22 | public static final int NUM_CORES = 6;
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23 | public static final int NUM_PARTITIONS = 2*NUM_CORES; // default would appear to be 2
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24 |
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25 | protected String _input_dir;
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26 | protected String _json_list_filename;
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27 | protected String _solr_url;
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28 | protected String _output_dir;
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29 |
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30 | protected int _verbosity;
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31 |
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32 | public PrepareForIngest(String input_dir, String json_list_filename,
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33 | String solr_url, String output_dir, int verbosity)
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34 | {
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35 | _input_dir = input_dir;
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36 | _json_list_filename = (json_list_filename != null) ? json_list_filename : input_dir;
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37 |
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38 | _solr_url = solr_url;
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39 | _output_dir = output_dir;
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40 | _verbosity = verbosity;
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41 | }
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42 |
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43 | public void exec()
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44 | {
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45 | String spark_app_name = "HathiTrust Extract Features: Prepare for Solr Ingest";
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46 | spark_app_name += " [" + _json_list_filename + "]";
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47 |
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48 | SparkConf conf = new SparkConf().setAppName(spark_app_name);
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49 | JavaSparkContext jsc = new JavaSparkContext(conf);
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50 |
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51 | if (_verbosity >= 2) {
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52 | System.out.println("Default Minimum Partions: " + jsc.defaultMinPartitions());
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53 | System.out.println("Default Parallelism: " + jsc.defaultParallelism());
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54 | }
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55 |
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56 | JavaRDD<String> json_list_data = jsc.textFile(_json_list_filename,NUM_PARTITIONS).cache();
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57 |
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58 | long num_volumes = json_list_data.count();
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59 | double per_vol = 100.0/(double)num_volumes;
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60 |
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61 | DoubleAccumulator progress_accum = jsc.sc().doubleAccumulator("Progress Percent");
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62 |
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63 | PagedJSON paged_json = new PagedJSON(_input_dir,_solr_url,_output_dir,_verbosity, progress_accum,per_vol);
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64 | //JavaRDD<String> json_ids = json_list_data.flatMap(paged_json).cache();
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65 |
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66 | json_list_data.foreach(paged_json);
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67 |
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68 |
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69 | /*
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70 | System.out.println("");
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71 | System.out.println("############");
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72 | System.out.println("# Progress Accumulator: " + progress_accum.value());
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73 | System.out.println("############");
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74 | System.out.println("");
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75 | */
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76 |
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77 | //long num_ids = json_ids.count();
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78 | long num_ids = num_volumes;
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79 |
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80 | System.out.println("");
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81 | System.out.println("############");
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82 | System.out.println("# Number of page ids: " + num_ids);
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83 | System.out.println("############");
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84 | System.out.println("");
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85 |
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86 | /*
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87 | if (_output_dir != null) {
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88 | String rdd_save_file = "rdd-solr-json-page-files";
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89 | json_ids.saveAsTextFile(rdd_save_file);
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90 | System.out.println("############");
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91 | System.out.println("# Saved RDD of Solr JSON page files, top-level, as:");
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92 | System.out.println("# " + rdd_save_file);
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93 | System.out.println("############");
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94 | System.out.println("");
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95 | }
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96 | */
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97 |
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98 | jsc.close();
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99 | }
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100 |
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101 | public static void print_usage(HelpFormatter formatter, Options options)
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102 | {
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103 | formatter.printHelp("RUN.bash [options] input-dir json-filelist.txt", options);
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104 | }
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105 | public static void main(String[] args) {
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106 |
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107 |
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108 | Options options = new Options();
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109 |
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110 | Option verbosity_opt = new Option("v", "verbosity", true,
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111 | "Set to control the level of debugging output [0=none, 1=some, 2=lots]");
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112 | verbosity_opt.setRequired(false);
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113 | options.addOption(verbosity_opt);
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114 |
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115 | Option output_dir_opt = new Option("o", "output-dir", true,
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116 | "If specified, save BZipped Solr JSON files to this directory");
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117 | output_dir_opt.setRequired(false);
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118 | options.addOption(output_dir_opt);
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119 |
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120 | Option solr_url_opt = new Option("u", "solr-url", true,
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121 | "If specified, the URL to post the Solr JSON data to");
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122 | solr_url_opt.setRequired(false);
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123 | options.addOption(solr_url_opt);
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124 |
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125 | Option read_only_opt = new Option("r", "read-only", false,
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126 | "Used to initiate a run where the files are all read in, but nothing is ingested/saved");
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127 | read_only_opt.setRequired(false);
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128 | options.addOption(read_only_opt);
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129 |
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130 | // Need to work with CLI v1.2 as this is the JAR that is bundled with Hadoop/Spark
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131 | CommandLineParser parser = new GnuParser();
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132 | //CommandLineParser parser = new DefaultParser(); // if working with CLI v1.3 and above
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133 |
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134 | HelpFormatter formatter = new HelpFormatter();
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135 | CommandLine cmd = null;
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136 |
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137 | try {
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138 | cmd = parser.parse(options, args);
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139 | }
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140 | catch (ParseException e) {
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141 | System.err.println(e.getMessage());
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142 | print_usage(formatter,options);
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143 | System.exit(1);
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144 | }
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145 |
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146 |
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147 | String verbosity_str = cmd.getOptionValue("verbosity","0");
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148 | int verbosity = Integer.parseInt(verbosity_str);
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149 |
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150 | String output_dir = cmd.getOptionValue("output-dir",null);
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151 | String solr_url = cmd.getOptionValue("solr-url",null);
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152 | boolean read_only = cmd.hasOption("read-only");
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153 |
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154 | String[] filtered_args = cmd.getArgs();
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155 |
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156 | if (filtered_args.length != 2) {
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157 | print_usage(formatter,options);
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158 | System.exit(1);
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159 | }
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160 |
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161 | if (!read_only && ((output_dir == null) && (solr_url==null))) {
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162 | System.err.println("Need to specify either --solr-url or --output-dir otherwise generated files are not ingested/saved");
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163 | print_usage(formatter,options);
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164 | System.exit(1);
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165 | }
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166 | if (read_only) {
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167 | // For this case, need to ensure solr-url and output-dir are null
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168 | output_dir = null;
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169 | solr_url = null;
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170 | }
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171 |
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172 | String input_dir = filtered_args[0];
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173 | String json_list_filename = filtered_args[1];
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174 |
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175 | PrepareForIngest prep_for_ingest
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176 | = new PrepareForIngest(input_dir,json_list_filename,solr_url,output_dir,verbosity);
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177 | prep_for_ingest.exec();
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178 |
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179 | }
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180 | }
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