| /** |
| * 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.crunch.io; |
| |
| import java.io.UnsupportedEncodingException; |
| import java.net.URLDecoder; |
| import java.net.URLEncoder; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| |
| import com.google.common.base.Joiner; |
| import com.google.common.base.Preconditions; |
| import com.google.common.base.Splitter; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Maps; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapreduce.InputFormat; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.JobContext; |
| |
| /** |
| * Helper functions for configuring multiple {@code InputFormat} instances within a single |
| * Crunch MapReduce job. |
| */ |
| public class CrunchInputs { |
| public static final String CRUNCH_INPUTS = "crunch.inputs.dir"; |
| |
| private static final char RECORD_SEP = ','; |
| private static final char FIELD_SEP = ';'; |
| private static final char PATH_SEP = '|'; |
| private static final Joiner JOINER = Joiner.on(FIELD_SEP); |
| private static final Splitter SPLITTER = Splitter.on(FIELD_SEP); |
| |
| public static void addInputPath(Job job, Path path, FormatBundle inputBundle, int nodeIndex) { |
| addInputPaths(job, Collections.singleton(path), inputBundle, nodeIndex); |
| } |
| |
| public static void addInputPaths(Job job, Collection<Path> paths, FormatBundle inputBundle, int nodeIndex) { |
| Configuration conf = job.getConfiguration(); |
| List<String> encodedPathStrs = Lists.newArrayListWithExpectedSize(paths.size()); |
| for (Path path : paths) { |
| String pathStr = encodePath(path); |
| Preconditions.checkArgument(pathStr.indexOf(RECORD_SEP) == -1 && pathStr.indexOf(FIELD_SEP) == -1 && pathStr.indexOf(PATH_SEP) == -1); |
| encodedPathStrs.add(pathStr); |
| } |
| String inputs = JOINER.join(inputBundle.serialize(), String.valueOf(nodeIndex), Joiner.on(PATH_SEP).join(encodedPathStrs)); |
| String existing = conf.get(CRUNCH_INPUTS); |
| conf.set(CRUNCH_INPUTS, existing == null ? inputs : existing + RECORD_SEP + inputs); |
| } |
| |
| public static Map<FormatBundle, Map<Integer, List<Path>>> getFormatNodeMap(JobContext job) { |
| Map<FormatBundle, Map<Integer, List<Path>>> formatNodeMap = Maps.newHashMap(); |
| Configuration conf = job.getConfiguration(); |
| String crunchInputs = conf.get(CRUNCH_INPUTS); |
| if (crunchInputs == null || crunchInputs.isEmpty()) { |
| return ImmutableMap.of(); |
| } |
| for (String input : Splitter.on(RECORD_SEP).split(crunchInputs)) { |
| List<String> fields = Lists.newArrayList(SPLITTER.split(input)); |
| FormatBundle<InputFormat> inputBundle = FormatBundle.fromSerialized(fields.get(0), job.getConfiguration()); |
| if (!formatNodeMap.containsKey(inputBundle)) { |
| formatNodeMap.put(inputBundle, Maps.<Integer, List<Path>>newHashMap()); |
| } |
| Integer nodeIndex = Integer.valueOf(fields.get(1)); |
| if (!formatNodeMap.get(inputBundle).containsKey(nodeIndex)) { |
| formatNodeMap.get(inputBundle).put(nodeIndex, Lists.<Path>newLinkedList()); |
| } |
| List<Path> formatNodePaths = formatNodeMap.get(inputBundle).get(nodeIndex); |
| String encodedPaths = fields.get(2); |
| for (String encodedPath : Splitter.on(PATH_SEP).split(encodedPaths)) { |
| formatNodePaths.add(decodePath(encodedPath)); |
| } |
| } |
| return formatNodeMap; |
| } |
| |
| private static String encodePath(Path path) { |
| try { |
| return URLEncoder.encode(path.toString(), "UTF-8"); |
| } catch (UnsupportedEncodingException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| private static Path decodePath(String encodedPath) { |
| try { |
| return new Path(URLDecoder.decode(encodedPath, "UTF-8")); |
| } catch (UnsupportedEncodingException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| } |