package mobvista.dmp.datasource.ga.mapreduce.reduce; import mobvista.dmp.datasource.ga.mapreduce.vo.TextPair; import org.apache.hadoop.io.NullWritable; import org.apache.hadoop.io.Text; import org.apache.hadoop.mapreduce.Reducer; import java.io.IOException; /** * * Created by fl on 2017/4/26. */ public class GaActiveTotalReducer extends Reducer<TextPair, Text, NullWritable, Text> { @Override protected void reduce(TextPair key, Iterable<Text> values, Context context) throws IOException, InterruptedException { for (Text val : values) { context.write(NullWritable.get(), val); break; } } }