| /* |
| * 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.sysds.runtime.controlprogram.parfor; |
| |
| import java.io.File; |
| import java.util.Iterator; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.SequenceFile; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.spark.api.java.function.VoidFunction; |
| import org.apache.sysds.common.Types.FileFormat; |
| import org.apache.sysds.conf.ConfigurationManager; |
| import org.apache.sysds.runtime.controlprogram.parfor.util.PairWritableBlock; |
| import org.apache.sysds.runtime.io.IOUtilFunctions; |
| import org.apache.sysds.runtime.matrix.data.MatrixBlock; |
| import org.apache.sysds.runtime.matrix.data.MatrixIndexes; |
| import org.apache.sysds.runtime.util.HDFSTool; |
| |
| import scala.Tuple2; |
| |
| public class DataPartitionerRemoteSparkReducer implements VoidFunction<Tuple2<Long, Iterable<Writable>>> |
| { |
| private static final long serialVersionUID = -7149865018683261964L; |
| |
| private final String _fnameNew; |
| private final int _replication; |
| |
| public DataPartitionerRemoteSparkReducer(String fnameNew, FileFormat fmt, int replication) { |
| _fnameNew = fnameNew; |
| _replication = replication; |
| } |
| |
| @Override |
| @SuppressWarnings({ "deprecation", "resource" }) |
| public void call(Tuple2<Long, Iterable<Writable>> arg0) |
| throws Exception |
| { |
| //prepare grouped partition input |
| Long key = arg0._1(); |
| Iterator<Writable> valueList = arg0._2().iterator(); |
| |
| //write entire partition to binary block sequence file |
| //create sequence file writer |
| Configuration job = new Configuration(ConfigurationManager.getCachedJobConf()); |
| job.setInt(HDFSTool.DFS_REPLICATION, _replication); |
| Path path = new Path(_fnameNew + File.separator + key); |
| |
| SequenceFile.Writer writer = null; |
| try { |
| FileSystem fs = IOUtilFunctions.getFileSystem(path, job); |
| writer = new SequenceFile.Writer(fs, job, path, MatrixIndexes.class, MatrixBlock.class); |
| |
| //write individual blocks unordered to output |
| while( valueList.hasNext() ) { |
| PairWritableBlock pair = (PairWritableBlock) valueList.next(); |
| writer.append(pair.indexes, pair.block); |
| } |
| } |
| finally { |
| IOUtilFunctions.closeSilently(writer); |
| } |
| } |
| } |