Created
September 1, 2023 13:38
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package count; | |
import java.io.IOException; | |
import org.apache.hadoop.conf.Configuration; | |
import org.apache.hadoop.fs.Path; | |
import org.apache.hadoop.io.IntWritable; | |
import org.apache.hadoop.io.LongWritable; | |
import org.apache.hadoop.io.Text; | |
import org.apache.hadoop.mapreduce.Job; | |
import org.apache.hadoop.mapreduce.Mapper; | |
import org.apache.hadoop.mapreduce.Reducer; | |
import org.apache.hadoop.mapreduce.Mapper.Context; | |
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; | |
import org.apache.hadoop.mapreduce.lib.input.TextInputFormat; | |
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; | |
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat; | |
public class count { | |
public static class mapper extends Mapper<LongWritable,Text , Text, IntWritable> { | |
public void map(LongWritable key,Text value,Context context) throws IOException,InterruptedException{ | |
String field[]=value.toString().split(","); | |
String gender=field[2].trim(); | |
if(gender.equalsIgnoreCase("female")) { | |
context.write(new Text("female count"),new IntWritable(1)); | |
} | |
} | |
} | |
public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable>{ | |
public void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException,InterruptedException{ | |
int count=0; | |
for(IntWritable i:values) { | |
count+=i.get(); | |
} | |
context.write(key, new IntWritable(count)); | |
} | |
} | |
public static void main(String args[]) throws Exception{ | |
Configuration conf=new Configuration(); | |
Job job=Job.getInstance(conf,"condition"); | |
job.setJobName("condition"); | |
job.setJar("condition.jar"); | |
job.setJarByClass(count.class); | |
job.setMapperClass(mapper.class); | |
job.setReducerClass(Reduce.class); | |
job.setOutputKeyClass(Text.class); | |
job.setOutputValueClass(IntWritable.class); | |
job.setInputFormatClass(TextInputFormat.class); | |
job.setOutputFormatClass(TextOutputFormat.class); | |
job.setNumReduceTasks(1); | |
FileInputFormat.setInputPaths(job, new Path(args[0])); | |
FileOutputFormat.setOutputPath(job, new Path(args[1])); | |
System.exit(job.waitForCompletion(true)?0:1); | |
} | |
} |
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Hi. It`s good. Bravo