| /* |
| * 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.giraph.block_app.framework.output; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.giraph.bsp.BspOutputFormat; |
| import org.apache.giraph.conf.GiraphConfiguration; |
| import org.apache.giraph.conf.GiraphConstants; |
| import org.apache.giraph.conf.StrConfOption; |
| import org.apache.giraph.utils.ConfigurationObjectUtils; |
| import org.apache.giraph.utils.DefaultOutputCommitter; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.mapreduce.JobContext; |
| import org.apache.hadoop.mapreduce.OutputCommitter; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| |
| /** |
| * Hadoop output format to use with block output. |
| * It keeps track of all registered outputs, and knows how to create them. |
| */ |
| public class BlockOutputFormat extends BspOutputFormat { |
| private static final StrConfOption OUTPUT_CONF_OPTIONS = new StrConfOption( |
| "giraph.outputConfOptions", "", |
| "List of conf options for outputs used"); |
| |
| public static <OD> void addOutputDesc(OD outputDesc, String confOption, |
| GiraphConfiguration conf) { |
| GiraphConstants.HADOOP_OUTPUT_FORMAT_CLASS.set(conf, |
| BlockOutputFormat.class); |
| String currentOutputs = OUTPUT_CONF_OPTIONS.get(conf); |
| if (!currentOutputs.isEmpty()) { |
| currentOutputs = currentOutputs + ","; |
| } |
| OUTPUT_CONF_OPTIONS.set(conf, currentOutputs + confOption); |
| ConfigurationObjectUtils.setObjectKryo(outputDesc, confOption, conf); |
| } |
| |
| /** |
| * Returns an array of output configuration options set in the input |
| * configuration. |
| * |
| * @param conf Configuration |
| * @return Array of options |
| */ |
| public static String[] getOutputConfOptions(Configuration conf) { |
| String outputConfOptions = OUTPUT_CONF_OPTIONS.get(conf); |
| return outputConfOptions.isEmpty() ? |
| new String[0] : outputConfOptions.split(","); |
| } |
| |
| public static <OW extends BlockOutputWriter, OD extends BlockOutputDesc<OW>> |
| OD createInitAndCheckOutputDesc(String confOption, Configuration conf, |
| String jobIdentifier) { |
| OD outputDesc = ConfigurationObjectUtils.getObjectKryo(confOption, conf); |
| outputDesc.initializeAndCheck(jobIdentifier, conf); |
| return outputDesc; |
| } |
| |
| public static Map<String, BlockOutputDesc> |
| createInitAndCheckOutputDescsMap(Configuration conf, String jobIdentifier) { |
| String[] outputConfOptions = getOutputConfOptions(conf); |
| Map<String, BlockOutputDesc> ret = new HashMap<>(outputConfOptions.length); |
| for (String outputConfOption : outputConfOptions) { |
| ret.put(outputConfOption, |
| createInitAndCheckOutputDesc(outputConfOption, conf, jobIdentifier)); |
| } |
| return ret; |
| } |
| |
| public static Map<String, BlockOutputDesc> createInitAndCheckOutputDescsMap( |
| JobContext jobContext) { |
| return createInitAndCheckOutputDescsMap(jobContext.getConfiguration(), |
| jobContext.getJobID().toString()); |
| } |
| |
| @Override |
| public void checkOutputSpecs(JobContext jobContext) |
| throws IOException, InterruptedException { |
| createInitAndCheckOutputDescsMap(jobContext); |
| } |
| |
| @Override |
| public OutputCommitter getOutputCommitter( |
| TaskAttemptContext context) throws IOException, InterruptedException { |
| return new DefaultOutputCommitter() { |
| @Override |
| public void commit(JobContext jobContext) throws IOException { |
| Map<String, BlockOutputDesc> map = |
| createInitAndCheckOutputDescsMap(jobContext); |
| for (BlockOutputDesc outputDesc : map.values()) { |
| outputDesc.commit(); |
| } |
| } |
| }; |
| } |
| } |