forked from D-Net/dnet-hadoop
80 lines
2.4 KiB
Java
80 lines
2.4 KiB
Java
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package eu.dnetlib.dhp.actionmanager.createunresolvedentities;
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import static eu.dnetlib.dhp.actionmanager.createunresolvedentities.Constants.*;
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import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkSession;
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import java.io.Serializable;
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import org.apache.commons.io.IOUtils;
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import org.apache.spark.SparkConf;
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import org.apache.spark.api.java.function.MapFunction;
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import org.apache.spark.api.java.function.MapGroupsFunction;
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import org.apache.spark.sql.Encoders;
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import org.apache.spark.sql.SaveMode;
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import org.apache.spark.sql.SparkSession;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import eu.dnetlib.dhp.application.ArgumentApplicationParser;
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import eu.dnetlib.dhp.schema.oaf.Result;
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public class SparkSaveUnresolved implements Serializable {
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private static final Logger log = LoggerFactory.getLogger(PrepareFOSSparkJob.class);
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public static void main(String[] args) throws Exception {
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String jsonConfiguration = IOUtils
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.toString(
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PrepareFOSSparkJob.class
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.getResourceAsStream(
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"/eu/dnetlib/dhp/actionmanager/createunresolvedentities/produce_unresolved_parameters.json"));
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final ArgumentApplicationParser parser = new ArgumentApplicationParser(jsonConfiguration);
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parser.parseArgument(args);
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Boolean isSparkSessionManaged = isSparkSessionManaged(parser);
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log.info("isSparkSessionManaged: {}", isSparkSessionManaged);
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String sourcePath = parser.get("sourcePath");
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log.info("sourcePath: {}", sourcePath);
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final String outputPath = parser.get("outputPath");
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log.info("outputPath: {}", outputPath);
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SparkConf conf = new SparkConf();
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runWithSparkSession(
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conf,
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isSparkSessionManaged,
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spark -> {
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saveUnresolved(
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spark,
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sourcePath,
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outputPath);
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});
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}
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private static void saveUnresolved(SparkSession spark, String sourcePath, String outputPath) {
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spark
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.read()
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.textFile(sourcePath + "/*")
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.map(
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(MapFunction<String, Result>) l -> OBJECT_MAPPER.readValue(l, Result.class),
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Encoders.bean(Result.class))
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.groupByKey((MapFunction<Result, String>) r -> r.getId(), Encoders.STRING())
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.mapGroups((MapGroupsFunction<String, Result, Result>) (k, it) -> {
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Result ret = it.next();
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it.forEachRemaining(r -> ret.mergeFrom(r));
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return ret;
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}, Encoders.bean(Result.class))
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.write()
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.mode(SaveMode.Overwrite)
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.option("compression", "gzip")
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.json(outputPath);
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}
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}
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