forked from D-Net/dnet-hadoop
73 lines
3.1 KiB
Java
73 lines
3.1 KiB
Java
package eu.dnetlib.dedup;
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import com.google.common.hash.Hashing;
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import eu.dnetlib.dhp.application.ArgumentApplicationParser;
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import eu.dnetlib.dhp.schema.oaf.Relation;
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import eu.dnetlib.pace.config.DedupConfig;
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import eu.dnetlib.pace.model.MapDocument;
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import eu.dnetlib.pace.util.MapDocumentUtil;
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import org.apache.commons.io.IOUtils;
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import org.apache.spark.api.java.JavaPairRDD;
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import org.apache.spark.api.java.JavaRDD;
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import org.apache.spark.api.java.JavaSparkContext;
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import org.apache.spark.api.java.function.PairFunction;
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import org.apache.spark.sql.Encoders;
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import org.apache.spark.sql.SparkSession;
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import scala.Tuple2;
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import java.util.List;
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/**
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* This Spark class creates similarity relations between entities, saving result
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*
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* param request:
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* sourcePath
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* entityType
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* target Path
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*/
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public class SparkCreateSimRels {
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public static void main(String[] args) throws Exception {
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final ArgumentApplicationParser parser = new ArgumentApplicationParser(IOUtils.toString(SparkCreateSimRels.class.getResourceAsStream("/eu/dnetlib/dhp/dedup/dedup_parameters.json")));
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parser.parseArgument(args);
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final SparkSession spark = SparkSession
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.builder()
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.appName(SparkCreateSimRels.class.getSimpleName())
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.master(parser.get("master"))
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.getOrCreate();
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final JavaSparkContext sc = new JavaSparkContext(spark.sparkContext());
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final String inputPath = parser.get("sourcePath");
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final String entity = parser.get("entity");
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final String targetPath = parser.get("targetPath");
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// final DedupConfig dedupConf = DedupConfig.load(IOUtils.toString(SparkCreateSimRels.class.getResourceAsStream("/eu/dnetlib/dhp/dedup/conf/org.curr.conf.json")));
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final DedupConfig dedupConf = DedupConfig.load(parser.get("dedupConf"));
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final long total = sc.textFile(inputPath + "/" + entity).count();
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JavaPairRDD<String, MapDocument> mapDocument = sc.textFile(inputPath + "/" + entity)
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.mapToPair(s->{
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MapDocument d = MapDocumentUtil.asMapDocumentWithJPath(dedupConf,s);
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return new Tuple2<>(d.getIdentifier(), d);});
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//create blocks for deduplication
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JavaPairRDD<String, List<MapDocument>> blocks = Deduper.createsortedBlocks(sc, mapDocument, dedupConf);
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// JavaPairRDD<String, Iterable<MapDocument>> blocks = Deduper.createBlocks(sc, mapDocument, dedupConf);
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//create relations by comparing only elements in the same group
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final JavaPairRDD<String,String> dedupRels = Deduper.computeRelations2(sc, blocks, dedupConf);
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// final JavaPairRDD<String,String> dedupRels = Deduper.computeRelations(sc, blocks, dedupConf);
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final JavaRDD<Relation> isSimilarToRDD = dedupRels.map(simRel -> {
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final Relation r = new Relation();
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r.setSource(simRel._1());
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r.setTarget(simRel._2());
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r.setRelClass("isSimilarTo");
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return r;
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});
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spark.createDataset(isSimilarToRDD.rdd(), Encoders.bean(Relation.class)).write().mode("overwrite").save( DedupUtility.createSimRelPath(targetPath,entity));
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}
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} |