| /* |
| * 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.configuration.BaseConfiguration; |
| import org.apache.commons.configuration.Configuration; |
| import org.apache.tinkerpop.gremlin.hadoop.Constants; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.HadoopConfiguration; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.HadoopGraph; |
| import org.apache.tinkerpop.gremlin.process.computer.GraphComputer; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class InputOutputHelper { |
| |
| private static Map<Class<? extends InputRDD>, Class<? extends OutputRDD>> INPUT_TO_OUTPUT_CACHE = new ConcurrentHashMap<>(); |
| private static Map<Class<? extends OutputRDD>, Class<? extends InputRDD>> OUTPUT_TO_INPUT_CACHE = new ConcurrentHashMap<>(); |
| |
| static { |
| INPUT_TO_OUTPUT_CACHE.put(PersistedInputRDD.class, PersistedOutputRDD.class); |
| INPUT_TO_OUTPUT_CACHE.put(InputFormatRDD.class, OutputFormatRDD.class); |
| // |
| OUTPUT_TO_INPUT_CACHE.put(PersistedOutputRDD.class, PersistedInputRDD.class); |
| OUTPUT_TO_INPUT_CACHE.put(OutputFormatRDD.class, InputFormatRDD.class); |
| } |
| |
| private InputOutputHelper() { |
| |
| } |
| |
| public static Class<? extends InputRDD> getInputFormat(final Class<? extends OutputRDD> outputRDD) { |
| return OUTPUT_TO_INPUT_CACHE.get(outputRDD); |
| } |
| |
| public static Class<? extends OutputRDD> getOutputFormat(final Class<? extends InputRDD> inputRDD) { |
| return INPUT_TO_OUTPUT_CACHE.get(inputRDD); |
| } |
| |
| public static void registerInputOutputPair(final Class<? extends InputRDD> inputRDD, final Class<? extends OutputRDD> outputRDD) { |
| INPUT_TO_OUTPUT_CACHE.put(inputRDD, outputRDD); |
| OUTPUT_TO_INPUT_CACHE.put(outputRDD, inputRDD); |
| } |
| |
| public static HadoopGraph getOutputGraph(final Configuration configuration, final GraphComputer.ResultGraph resultGraph, final GraphComputer.Persist persist) { |
| try { |
| final HadoopConfiguration hadoopConfiguration = new HadoopConfiguration(configuration); |
| final BaseConfiguration newConfiguration = new BaseConfiguration(); |
| newConfiguration.copy(org.apache.tinkerpop.gremlin.hadoop.structure.io.InputOutputHelper.getOutputGraph(configuration, resultGraph, persist).configuration()); |
| if (resultGraph.equals(GraphComputer.ResultGraph.NEW) && hadoopConfiguration.containsKey(Constants.GREMLIN_SPARK_GRAPH_OUTPUT_RDD)) { |
| newConfiguration.setProperty(Constants.GREMLIN_HADOOP_GRAPH_INPUT_FORMAT, InputRDDFormat.class.getCanonicalName()); |
| //newConfiguration.setProperty(Constants.GREMLIN_HADOOP_GRAPH_OUTPUT_FORMAT, OutputRDDFormat.class.getCanonicalName()); |
| newConfiguration.setProperty(Constants.GREMLIN_SPARK_GRAPH_INPUT_RDD, InputOutputHelper.getInputFormat((Class) Class.forName(hadoopConfiguration.getString(Constants.GREMLIN_SPARK_GRAPH_OUTPUT_RDD))).getCanonicalName()); |
| } |
| return HadoopGraph.open(newConfiguration); |
| } catch (final ClassNotFoundException e) { |
| throw new IllegalArgumentException(e.getMessage(), e); |
| } |
| } |
| } |