| /* |
| * 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.tinkerpop.gremlin.spark.structure.io; |
| |
| import org.apache.commons.configuration2.Configuration; |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.mapreduce.InputFormat; |
| import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat; |
| import org.apache.spark.api.java.JavaPairRDD; |
| import org.apache.spark.api.java.JavaSparkContext; |
| import org.apache.tinkerpop.gremlin.hadoop.Constants; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritable; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.util.ConfUtil; |
| import scala.Tuple2; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class InputFormatRDD implements InputRDD { |
| |
| @Override |
| public JavaPairRDD<Object, VertexWritable> readGraphRDD(final Configuration configuration, final JavaSparkContext sparkContext) { |
| final org.apache.hadoop.conf.Configuration hadoopConfiguration = ConfUtil.makeHadoopConfiguration(configuration); |
| return sparkContext.newAPIHadoopRDD(hadoopConfiguration, |
| (Class<InputFormat<NullWritable, VertexWritable>>) hadoopConfiguration.getClass(Constants.GREMLIN_HADOOP_GRAPH_READER, InputFormat.class), |
| NullWritable.class, |
| VertexWritable.class) |
| .mapToPair(tuple -> new Tuple2<>(tuple._2().get().id(), new VertexWritable(tuple._2().get()))); |
| } |
| |
| @Override |
| public <K, V> JavaPairRDD<K, V> readMemoryRDD(final Configuration configuration, final String memoryKey, final JavaSparkContext sparkContext) { |
| return sparkContext.newAPIHadoopRDD(ConfUtil.makeHadoopConfiguration(configuration), |
| SequenceFileInputFormat.class, |
| ObjectWritable.class, |
| ObjectWritable.class) |
| .mapToPair(tuple -> new Tuple2<>((K) ((Tuple2<ObjectWritable, ObjectWritable>) tuple)._1().get(), (V) ((Tuple2<ObjectWritable, ObjectWritable>) tuple)._2().get())); |
| } |
| } |