forked from D-Net/dnet-hadoop
62 lines
2.4 KiB
Java
62 lines
2.4 KiB
Java
package eu.dnetlib.dhp.graph;
|
|
|
|
import com.fasterxml.jackson.databind.ObjectMapper;
|
|
import eu.dnetlib.dhp.application.ArgumentApplicationParser;
|
|
import org.apache.commons.io.IOUtils;
|
|
import org.apache.spark.SparkConf;
|
|
import org.apache.spark.api.java.JavaSparkContext;
|
|
import org.apache.spark.sql.Encoders;
|
|
import org.apache.spark.sql.SaveMode;
|
|
import org.apache.spark.sql.SparkSession;
|
|
|
|
public class SparkGraphImporterJob {
|
|
|
|
public static void main(String[] args) throws Exception {
|
|
|
|
final ArgumentApplicationParser parser = new ArgumentApplicationParser(
|
|
IOUtils.toString(SparkGraphImporterJob.class.getResourceAsStream(
|
|
"/eu/dnetlib/dhp/graph/input_graph_parameters.json")));
|
|
parser.parseArgument(args);
|
|
|
|
new SparkGraphImporterJob().run(parser);
|
|
}
|
|
|
|
private void run(ArgumentApplicationParser parser) {
|
|
try(SparkSession spark = getSparkSession(parser)) {
|
|
|
|
final String inputPath = parser.get("sourcePath");
|
|
final String hiveDbName = parser.get("hive_db_name");
|
|
|
|
runWith(spark, inputPath, hiveDbName);
|
|
}
|
|
}
|
|
|
|
// public for testing
|
|
public void runWith(SparkSession spark, String inputPath, String hiveDbName) {
|
|
|
|
spark.sql(String.format("DROP DATABASE IF EXISTS %s CASCADE", hiveDbName));
|
|
spark.sql(String.format("CREATE DATABASE IF NOT EXISTS %s", hiveDbName));
|
|
|
|
final JavaSparkContext sc = new JavaSparkContext(spark.sparkContext());
|
|
// Read the input file and convert it into RDD of serializable object
|
|
GraphMappingUtils.types.forEach((name, clazz) -> spark.createDataset(sc.textFile(inputPath + "/" + name)
|
|
.map(s -> new ObjectMapper().readValue(s, clazz))
|
|
.rdd(), Encoders.bean(clazz))
|
|
.write()
|
|
.mode(SaveMode.Overwrite)
|
|
.saveAsTable(hiveDbName + "." + name));
|
|
}
|
|
|
|
private static SparkSession getSparkSession(ArgumentApplicationParser parser) {
|
|
SparkConf conf = new SparkConf();
|
|
conf.set("hive.metastore.uris", parser.get("hive_metastore_uris"));
|
|
return SparkSession
|
|
.builder()
|
|
.appName(SparkGraphImporterJob.class.getSimpleName())
|
|
.master(parser.get("master"))
|
|
.config(conf)
|
|
.enableHiveSupport()
|
|
.getOrCreate();
|
|
}
|
|
}
|