forked from D-Net/dnet-hadoop
117 lines
5.0 KiB
Java
117 lines
5.0 KiB
Java
package eu.dnetlib.dedup;
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import com.fasterxml.jackson.databind.DeserializationFeature;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import eu.dnetlib.dhp.application.ArgumentApplicationParser;
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import eu.dnetlib.dhp.schema.oaf.DataInfo;
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import eu.dnetlib.dhp.schema.oaf.Relation;
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import eu.dnetlib.dhp.utils.DHPUtils;
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import org.apache.commons.io.IOUtils;
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import org.apache.hadoop.io.compress.GzipCodec;
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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.Optional;
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import org.apache.spark.api.java.function.Function;
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import org.apache.spark.api.java.function.PairFunction;
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import org.apache.spark.sql.Dataset;
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import org.apache.spark.sql.Encoders;
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import org.apache.spark.sql.Row;
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import org.apache.spark.sql.SparkSession;
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import scala.Tuple2;
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import java.io.IOException;
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public class SparkPropagateRelationsJob {
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enum FieldType {
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SOURCE,
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TARGET
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}
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final static String SOURCEJSONPATH = "$.source";
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final static String TARGETJSONPATH = "$.target";
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public static void main(String[] args) throws Exception {
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final ArgumentApplicationParser parser = new ArgumentApplicationParser(IOUtils.toString(SparkPropagateRelationsJob.class.getResourceAsStream("/eu/dnetlib/dhp/dedup/dedup_propagate_relation_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(SparkUpdateEntityJob.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 relationPath = parser.get("relationPath");
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final String mergeRelPath = parser.get("mergeRelPath");
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final String targetRelPath = parser.get("targetRelPath");
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final Dataset<Relation> df = spark.read().load(mergeRelPath).as(Encoders.bean(Relation.class));
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final JavaPairRDD<String, String> mergedIds = df
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.where("relClass == 'merges'")
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.select(df.col("source"),df.col("target"))
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.distinct()
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.toJavaRDD()
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.mapToPair((PairFunction<Row, String, String>) r -> new Tuple2<>(r.getString(1), r.getString(0)));
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final JavaRDD<String> sourceEntity = sc.textFile(relationPath);
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JavaRDD<String> newRels = sourceEntity.mapToPair(
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(PairFunction<String, String, String>) s ->
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new Tuple2<>(DHPUtils.getJPathString(SOURCEJSONPATH, s), s))
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.leftOuterJoin(mergedIds)
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.map((Function<Tuple2<String, Tuple2<String, Optional<String>>>, String>) v1 -> {
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if (v1._2()._2().isPresent()) {
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return replaceField(v1._2()._1(), v1._2()._2().get(), FieldType.SOURCE);
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}
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return v1._2()._1();
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})
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.mapToPair(
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(PairFunction<String, String, String>) s ->
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new Tuple2<>(DHPUtils.getJPathString(TARGETJSONPATH, s), s))
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.leftOuterJoin(mergedIds)
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.map((Function<Tuple2<String, Tuple2<String, Optional<String>>>, String>) v1 -> {
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if (v1._2()._2().isPresent()) {
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return replaceField(v1._2()._1(), v1._2()._2().get(), FieldType.TARGET);
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}
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return v1._2()._1();
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}).filter(SparkPropagateRelationsJob::containsDedup)
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.repartition(500);
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newRels.union(sourceEntity).repartition(1000).saveAsTextFile(targetRelPath, GzipCodec.class);
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}
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private static boolean containsDedup(final String json) {
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final String source = DHPUtils.getJPathString(SOURCEJSONPATH, json);
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final String target = DHPUtils.getJPathString(TARGETJSONPATH, json);
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return source.toLowerCase().contains("dedup") || target.toLowerCase().contains("dedup");
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}
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private static String replaceField(final String json, final String id, final FieldType type) {
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ObjectMapper mapper = new ObjectMapper();
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mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
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try {
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Relation relation = mapper.readValue(json, Relation.class);
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if (relation.getDataInfo() == null)
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relation.setDataInfo(new DataInfo());
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relation.getDataInfo().setDeletedbyinference(false);
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switch (type) {
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case SOURCE:
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relation.setSource(id);
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return mapper.writeValueAsString(relation);
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case TARGET:
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relation.setTarget(id);
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return mapper.writeValueAsString(relation);
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default:
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throw new IllegalArgumentException("");
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}
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} catch (IOException e) {
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throw new RuntimeException("unable to deserialize json relation: " + json, e);
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}
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}
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}
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