forked from D-Net/dnet-hadoop
58 lines
2.3 KiB
Java
58 lines
2.3 KiB
Java
package eu.dnetlib.dhp.actionmanager.common;
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import eu.dnetlib.dhp.actionmanager.common.FunctionalInterfaceSupport.ThrowingConsumer;
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import org.apache.spark.SparkConf;
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import org.apache.spark.sql.SparkSession;
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import java.util.Objects;
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import java.util.function.Function;
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/**
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* SparkSession utility methods.
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*/
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public class SparkSessionSupport {
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private SparkSessionSupport() {
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}
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/**
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* Runs a given function using SparkSession created using default builder and supplied SparkConf. Stops SparkSession
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* when SparkSession is managed. Allows to reuse SparkSession created externally.
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*
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* @param conf SparkConf instance
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* @param isSparkSessionManaged When true will stop SparkSession
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* @param fn Consumer to be applied to constructed SparkSession
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*/
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public static void runWithSparkSession(SparkConf conf,
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Boolean isSparkSessionManaged,
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ThrowingConsumer<SparkSession, Exception> fn) {
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runWithSparkSession(c -> SparkSession.builder().config(c).getOrCreate(), conf, isSparkSessionManaged, fn);
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}
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/**
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* Runs a given function using SparkSession created using supplied builder and supplied SparkConf. Stops SparkSession
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* when SparkSession is managed. Allows to reuse SparkSession created externally.
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*
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* @param sparkSessionBuilder Builder of SparkSession
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* @param conf SparkConf instance
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* @param isSparkSessionManaged When true will stop SparkSession
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* @param fn Consumer to be applied to constructed SparkSession
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*/
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public static void runWithSparkSession(Function<SparkConf, SparkSession> sparkSessionBuilder,
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SparkConf conf,
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Boolean isSparkSessionManaged,
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ThrowingConsumer<SparkSession, Exception> fn) {
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SparkSession spark = null;
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try {
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spark = sparkSessionBuilder.apply(conf);
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fn.accept(spark);
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} catch (Exception e) {
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throw new RuntimeException(e);
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} finally {
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if (Objects.nonNull(spark) && isSparkSessionManaged) {
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spark.stop();
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}
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}
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}
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}
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