forked from D-Net/dnet-hadoop
72 lines
2.9 KiB
Java
72 lines
2.9 KiB
Java
package eu.dnetlib.dhp.migration.step3;
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import org.apache.commons.io.IOUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.hadoop.io.compress.GzipCodec;
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import org.apache.spark.api.java.JavaSparkContext;
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import org.apache.spark.sql.SparkSession;
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import eu.dnetlib.dhp.application.ArgumentApplicationParser;
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import eu.dnetlib.dhp.migration.step1.MigrateMongoMdstoresApplication;
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import eu.dnetlib.dhp.schema.oaf.Dataset;
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import eu.dnetlib.dhp.schema.oaf.Datasource;
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import eu.dnetlib.dhp.schema.oaf.Organization;
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import eu.dnetlib.dhp.schema.oaf.OtherResearchProduct;
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import eu.dnetlib.dhp.schema.oaf.Project;
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import eu.dnetlib.dhp.schema.oaf.Publication;
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import eu.dnetlib.dhp.schema.oaf.Relation;
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import eu.dnetlib.dhp.schema.oaf.Software;
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public class DispatchEntitiesApplication {
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private static final Log log = LogFactory.getLog(DispatchEntitiesApplication.class);
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public static void main(final String[] args) throws Exception {
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final ArgumentApplicationParser parser = new ArgumentApplicationParser(
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IOUtils.toString(MigrateMongoMdstoresApplication.class
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.getResourceAsStream("/eu/dnetlib/dhp/migration/dispatch_entities_parameters.json")));
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parser.parseArgument(args);
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try (final SparkSession spark = newSparkSession(parser); final JavaSparkContext sc = new JavaSparkContext(spark.sparkContext())) {
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final String sourcePath = parser.get("sourcePath");
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final String targetPath = parser.get("graphRawPath");
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processEntity(sc, Publication.class, sourcePath, targetPath);
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processEntity(sc, Dataset.class, sourcePath, targetPath);
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processEntity(sc, Software.class, sourcePath, targetPath);
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processEntity(sc, OtherResearchProduct.class, sourcePath, targetPath);
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processEntity(sc, Datasource.class, sourcePath, targetPath);
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processEntity(sc, Organization.class, sourcePath, targetPath);
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processEntity(sc, Project.class, sourcePath, targetPath);
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processEntity(sc, Relation.class, sourcePath, targetPath);
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}
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}
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private static SparkSession newSparkSession(final ArgumentApplicationParser parser) {
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return SparkSession
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.builder()
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.appName(DispatchEntitiesApplication.class.getSimpleName())
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.master(parser.get("master"))
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.getOrCreate();
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}
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private static void processEntity(final JavaSparkContext sc, final Class<?> clazz, final String sourcePath, final String targetPath) {
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final String type = clazz.getSimpleName().toLowerCase();
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log.info(String.format("Processing entities (%s) in file: %s", type, sourcePath));
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sc.textFile(sourcePath)
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.filter(l -> isEntityType(l, type))
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.map(l -> StringUtils.substringAfter(l, "|"))
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.saveAsTextFile(targetPath + "/" + type, GzipCodec.class); // use repartition(XXX) ???
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}
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private static boolean isEntityType(final String line, final String type) {
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return StringUtils.substringBefore(line, "|").equalsIgnoreCase(type);
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}
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}
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