/*
* 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();
}
}
}