InputOutputRDDTest.java example

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *
 * http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.tinkerpop.gremlin.spark.structure.io;

import org.apache.commons.configuration.BaseConfiguration;
import org.apache.commons.configuration.Configuration;
import org.apache.tinkerpop.gremlin.TestHelper;
import org.apache.tinkerpop.gremlin.hadoop.Constants;
import org.apache.tinkerpop.gremlin.hadoop.structure.HadoopGraph;
import org.apache.tinkerpop.gremlin.process.computer.GraphComputer;
import org.apache.tinkerpop.gremlin.process.computer.traversal.TraversalVertexProgram;
import org.apache.tinkerpop.gremlin.spark.AbstractSparkTest;
import org.apache.tinkerpop.gremlin.spark.process.computer.SparkGraphComputer;
import org.apache.tinkerpop.gremlin.spark.structure.io.gryo.GryoSerializer;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.util.GraphFactory;
import org.junit.Test;

/**
 * @author Marko A. Rodriguez (http://markorodriguez.com)
 */
public class InputOutputRDDTest extends AbstractSparkTest {

    @Test
    public void shouldReadFromWriteToArbitraryRDD() throws Exception {
        final Configuration configuration = new BaseConfiguration();
        configuration.setProperty("spark.master", "local[4]");
        configuration.setProperty("spark.serializer", GryoSerializer.class.getCanonicalName());
        configuration.setProperty(Graph.GRAPH, HadoopGraph.class.getName());
        configuration.setProperty(Constants.GREMLIN_HADOOP_GRAPH_READER, ExampleInputRDD.class.getCanonicalName());
        configuration.setProperty(Constants.GREMLIN_HADOOP_GRAPH_WRITER, ExampleOutputRDD.class.getCanonicalName());
        configuration.setProperty(Constants.GREMLIN_HADOOP_OUTPUT_LOCATION, TestHelper.makeTestDataDirectory(this.getClass(), "shouldReadFromWriteToArbitraryRDD"));
        configuration.setProperty(Constants.GREMLIN_HADOOP_JARS_IN_DISTRIBUTED_CACHE, false);
        ////////
        Graph graph = GraphFactory.open(configuration);
        graph.compute(SparkGraphComputer.class)
                .result(GraphComputer.ResultGraph.NEW)
                .persist(GraphComputer.Persist.EDGES)
                .program(TraversalVertexProgram.build()
                        .traversal(graph.traversal().withComputer(SparkGraphComputer.class),
                                "gremlin-groovy",
                                "g.V()").create(graph)).submit().get();
    }
}