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avoiding java.io.NotSerializableException: java.util.HashMap

This commit is contained in:
Claudio Atzori 2021-10-21 14:15:57 +02:00
parent 3702fe478d
commit d147295c2f
1 changed files with 9 additions and 5 deletions
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12
dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/CopyHdfsOafApplication.java
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@ -31,6 +31,7 @@ import eu.dnetlib.dhp.schema.oaf.Oaf;
import eu.dnetlib.dhp.schema.oaf.Relation;
import eu.dnetlib.dhp.utils.ISLookupClientFactory;
import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpService;
import scala.Tuple2;
public class CopyHdfsOafApplication extends AbstractMigrationApplication {
@ -73,10 +74,13 @@ public class CopyHdfsOafApplication extends AbstractMigrationApplication {
conf.set("spark.serializer", "org.apache.spark.serializer.KryoSerializer");
conf.registerKryoClasses(ModelSupport.getOafModelClasses());
runWithSparkSession(conf, isSparkSessionManaged, spark -> processPaths(spark, hdfsPath, paths));
final List<String> oafTypes = Lists.newArrayList(ModelSupport.oafTypes.keySet());
runWithSparkSession(conf, isSparkSessionManaged, spark -> processPaths(spark, oafTypes, hdfsPath, paths));
}
public static void processPaths(final SparkSession spark,
final List<String> oafTypes,
final String outputPath,
final Set<String> paths) {
@ -99,14 +103,14 @@ public class CopyHdfsOafApplication extends AbstractMigrationApplication {
.as(Encoders.kryo(Oaf.class));
// dispatch each entity type individually in the respective graph subdirectory in append mode
for (Map.Entry<String, Class> e : ModelSupport.oafTypes.entrySet()) {
for (String type : oafTypes) {
oaf
.filter((FilterFunction<Oaf>) o -> o.getClass().getSimpleName().toLowerCase().equals(e.getKey()))
.filter((FilterFunction<Oaf>) o -> o.getClass().getSimpleName().toLowerCase().equals(type))
.map((MapFunction<Oaf, String>) OBJECT_MAPPER::writeValueAsString, Encoders.STRING())
.write()
.option("compression", "gzip")
.mode(SaveMode.Append)
.text(outputPath + "/" + e.getKey());
.text(outputPath + "/" + type);
}
}
}