Java tutorial
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See the License for the * specific language governing permissions and limitations * under the License. */ package org.apache.tinkerpop.gremlin.spark.process.computer; import org.apache.spark.launcher.SparkLauncher; import org.apache.spark.serializer.KryoSerializer; import org.apache.tinkerpop.gremlin.GraphProvider; import org.apache.tinkerpop.gremlin.LoadGraphWith; import org.apache.tinkerpop.gremlin.groovy.util.SugarTestHelper; import org.apache.tinkerpop.gremlin.hadoop.Constants; import org.apache.tinkerpop.gremlin.hadoop.HadoopGraphProvider; import org.apache.tinkerpop.gremlin.hadoop.groovy.plugin.HadoopGremlinPluginCheck; import org.apache.tinkerpop.gremlin.hadoop.structure.io.FileSystemStorageCheck; import org.apache.tinkerpop.gremlin.hadoop.structure.io.HadoopPools; import org.apache.tinkerpop.gremlin.hadoop.structure.io.gryo.ToyIoRegistry; import org.apache.tinkerpop.gremlin.process.computer.Computer; import org.apache.tinkerpop.gremlin.process.computer.GraphComputer; import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource; import org.apache.tinkerpop.gremlin.process.traversal.engine.ComputerTraversalEngine; import org.apache.tinkerpop.gremlin.process.traversal.step.map.GroovyPageRankTest; import org.apache.tinkerpop.gremlin.process.traversal.step.map.GroovyPeerPressureTest; import org.apache.tinkerpop.gremlin.process.traversal.step.map.GroovyProgramTest; import org.apache.tinkerpop.gremlin.process.traversal.step.map.PageRankTest; import org.apache.tinkerpop.gremlin.process.traversal.step.map.PeerPressureTest; import org.apache.tinkerpop.gremlin.process.traversal.step.map.ProgramTest; import org.apache.tinkerpop.gremlin.spark.structure.Spark; import org.apache.tinkerpop.gremlin.spark.structure.io.PersistedOutputRDD; import org.apache.tinkerpop.gremlin.spark.structure.io.SparkContextStorageCheck; import org.apache.tinkerpop.gremlin.spark.structure.io.SparkIoRegistryCheck; import org.apache.tinkerpop.gremlin.spark.structure.io.ToyGraphInputRDD; import org.apache.tinkerpop.gremlin.spark.structure.io.gryo.GryoRegistrator; import org.apache.tinkerpop.gremlin.structure.Graph; import org.apache.tinkerpop.gremlin.structure.io.IoRegistry; import org.apache.tinkerpop.gremlin.structure.io.gryo.kryoshim.KryoShimService; import org.apache.tinkerpop.gremlin.structure.io.gryo.kryoshim.KryoShimServiceLoader; import java.util.Map; /** * @author Marko A. Rodriguez (http://markorodriguez.com) */ @GraphProvider.Descriptor(computer = SparkGraphComputer.class) public class SparkHadoopGraphProvider extends HadoopGraphProvider { protected static final String PREVIOUS_SPARK_PROVIDER = "previous.spark.provider"; @Override public Map<String, Object> getBaseConfiguration(final String graphName, final Class<?> test, final String testMethodName, final LoadGraphWith.GraphData loadGraphWith) { if (this.getClass().equals(SparkHadoopGraphProvider.class) && !SparkHadoopGraphProvider.class .getCanonicalName().equals(System.getProperty(PREVIOUS_SPARK_PROVIDER, null))) { Spark.close(); HadoopPools.close(); KryoShimServiceLoader.close(); System.setProperty(PREVIOUS_SPARK_PROVIDER, SparkHadoopGraphProvider.class.getCanonicalName()); } final Map<String, Object> config = super.getBaseConfiguration(graphName, test, testMethodName, loadGraphWith); config.put(Constants.GREMLIN_SPARK_PERSIST_CONTEXT, true); // this makes the test suite go really fast // toy graph inputRDD does not have corresponding outputRDD so where jobs chain, it fails (failing makes sense) if (null != loadGraphWith && !test.equals(ProgramTest.Traversals.class) && !test.equals(GroovyProgramTest.Traversals.class) && !test.equals(PageRankTest.Traversals.class) && !test.equals(GroovyPageRankTest.Traversals.class) && !test.equals(PeerPressureTest.Traversals.class) && !test.equals(GroovyPeerPressureTest.Traversals.class) && !test.equals(FileSystemStorageCheck.class) && !testMethodName.equals("shouldSupportJobChaining") && // GraphComputerTest.shouldSupportJobChaining RANDOM.nextBoolean()) { config.put(RANDOM.nextBoolean() ? Constants.GREMLIN_SPARK_GRAPH_INPUT_RDD : Constants.GREMLIN_HADOOP_GRAPH_READER, ToyGraphInputRDD.class.getCanonicalName()); } // tests persisted RDDs if (test.equals(SparkContextStorageCheck.class)) { config.put(RANDOM.nextBoolean() ? Constants.GREMLIN_SPARK_GRAPH_INPUT_RDD : Constants.GREMLIN_HADOOP_GRAPH_READER, ToyGraphInputRDD.class.getCanonicalName()); config.put(RANDOM.nextBoolean() ? Constants.GREMLIN_SPARK_GRAPH_OUTPUT_RDD : Constants.GREMLIN_HADOOP_GRAPH_WRITER, PersistedOutputRDD.class.getCanonicalName()); } // sugar plugin causes meta-method issues with a persisted context if (test.equals(HadoopGremlinPluginCheck.class)) { Spark.close(); HadoopPools.close(); KryoShimServiceLoader.close(); SugarTestHelper.clearRegistry(this); } config.put(Constants.GREMLIN_HADOOP_DEFAULT_GRAPH_COMPUTER, SparkGraphComputer.class.getCanonicalName()); config.put(SparkLauncher.SPARK_MASTER, "local[4]"); config.put(Constants.SPARK_SERIALIZER, KryoSerializer.class.getCanonicalName()); config.put(Constants.SPARK_KRYO_REGISTRATOR, GryoRegistrator.class.getCanonicalName()); config.put(Constants.SPARK_KRYO_REGISTRATION_REQUIRED, true); return config; } @Override public GraphTraversalSource traversal(final Graph graph) { return RANDOM.nextBoolean() ? RANDOM.nextBoolean() ? graph.traversal(GraphTraversalSource.build() .engine(ComputerTraversalEngine.build().computer(SparkGraphComputer.class) .workers(RANDOM.nextInt(3) + 1))) : graph.traversal().withComputer( Computer.compute(SparkGraphComputer.class).workers(RANDOM.nextInt(3) + 1)) : RANDOM.nextBoolean() ? graph.traversal(GraphTraversalSource.computer(SparkGraphComputer.class)) : graph.traversal().withComputer(); } @Override public GraphComputer getGraphComputer(final Graph graph) { return RANDOM.nextBoolean() ? graph.compute().workers(RANDOM.nextInt(3) + 1) : graph.compute(SparkGraphComputer.class); } }