Advanced Data Analytics Using Python_ With Machine Learning, Deep Learning and NLP Examples ( 2023)

Chapter 7
Analytics at Scale
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapred.TextInputFormat;
@SuppressWarnings("deprecation")
public class MapreduceJoin {
////////////////////////////////////////////////////////
@SuppressWarnings("deprecation")
public static class JoinReducer extends MapReduceBase
implements Reducer<Text, Text, Text, Text>
{
public void reduce(Text key, Iterator<Text>
values, OutputCollector<Text, Text> output,
Reporter reporter) throws IOException
{
ArrayList<String> translist = new
ArrayList<String>();
String secondvalue = "";
while (values.hasNext())
{
String currValue = values.next().
toString().trim();
if(currValue.contains("trans:")){
String[] temp = currValue.
split("trans:");
if(temp.length > 1)
translist.
add(temp[1]);
}
if(currValue.contains("sec:"))
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