| /** |
| * 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.hcatalog.utils; |
| |
| import java.io.BufferedWriter; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.hcatalog.data.HCatRecord; |
| import org.apache.hcatalog.data.transfer.DataTransferFactory; |
| import org.apache.hcatalog.data.transfer.HCatReader; |
| import org.apache.hcatalog.data.transfer.ReaderContext; |
| |
| public class DataReaderSlave { |
| |
| public static void main(String[] args) throws IOException, ClassNotFoundException { |
| |
| ObjectInputStream ois = new ObjectInputStream(new FileInputStream(new File(args[0]))); |
| ReaderContext cntxt = (ReaderContext) ois.readObject(); |
| ois.close(); |
| |
| String[] inpSlitsToRead = args[1].split(","); |
| List<InputSplit> splits = cntxt.getSplits(); |
| |
| for (int i = 0; i < inpSlitsToRead.length; i++){ |
| InputSplit split = splits.get(Integer.parseInt(inpSlitsToRead[i])); |
| HCatReader reader = DataTransferFactory.getHCatReader(split, cntxt.getConf()); |
| Iterator<HCatRecord> itr = reader.read(); |
| File f = new File(args[2]+"-"+i); |
| f.delete(); |
| BufferedWriter outFile = new BufferedWriter(new FileWriter(f)); |
| while(itr.hasNext()){ |
| String rec = itr.next().toString().replaceFirst("\\s+$", ""); |
| System.err.println(rec); |
| outFile.write(rec+"\n"); |
| } |
| outFile.close(); |
| } |
| } |
| } |