jerryshao commented on code in PR #9542: URL: https://github.com/apache/gravitino/pull/9542#discussion_r2652305496
########## maintenance/jobs/src/main/java/org/apache/gravitino/maintenance/jobs/spark/SparkPiJob.java: ########## @@ -0,0 +1,104 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.gravitino.maintenance.jobs.spark; + +import java.util.Collections; +import java.util.HashMap; +import java.util.Map; +import java.util.stream.Collectors; +import java.util.stream.IntStream; +import org.apache.gravitino.job.JobTemplateProvider; +import org.apache.gravitino.job.SparkJobTemplate; +import org.apache.gravitino.maintenance.jobs.BuiltInJob; +import org.apache.spark.api.java.JavaRDD; +import org.apache.spark.api.java.JavaSparkContext; +import org.apache.spark.sql.SparkSession; + +/** + * Self-contained Spark Pi program for the built-in SparkPi job template. + * + * <p>This avoids depending on the Spark examples jar so the built-in template can run with only the + * Gravitino-provided jobs artifact on the classpath. + */ +public class SparkPiJob implements BuiltInJob { + + private static final String NAME = JobTemplateProvider.BUILTIN_NAME_PREFIX + "sparkpi"; + // Bump VERSION whenever SparkPi template behavior changes (name/executable/class/args/configs). + private static final String VERSION = "v1"; + + @Override + public SparkJobTemplate jobTemplate() { + return SparkJobTemplate.builder() + .withName(NAME) + .withComment("Built-in SparkPi job template") + .withExecutable(resolveExecutable(SparkPiJob.class)) + .withClassName(SparkPiJob.class.getName()) + .withArguments(Collections.singletonList("{{slices}}")) + .withConfigs(buildSparkConfigs()) + .withCustomFields( + Collections.singletonMap(JobTemplateProvider.PROPERTY_VERSION_KEY, VERSION)) + .build(); + } + + public static void main(String[] args) { + int slices = 2; + if (args.length > 0) { + try { + slices = Integer.parseInt(args[0]); + } catch (NumberFormatException e) { + System.err.println("Invalid number of slices provided. Using default value of 2."); + } + } + + int samples = Math.max(slices, 1) * 100000; + + SparkSession spark = + SparkSession.builder() + .appName("Gravitino Built-in SparkPi") + // Rely on external cluster/master configuration + .getOrCreate(); + + JavaSparkContext jsc = JavaSparkContext.fromSparkContext(spark.sparkContext()); + JavaRDD<Integer> rdd = + jsc.parallelize(IntStream.range(0, samples).boxed().collect(Collectors.toList()), slices); + long count = + rdd.filter( + i -> { + double x = Math.random() * 2 - 1; + double y = Math.random() * 2 - 1; + return x * x + y * y <= 1; + }) + .count(); + + double pi = 4.0 * count / samples; Review Comment: This is only used in the specific job, so it is fine to use it. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
