eu.dicodeproject.analysis.histogram
Class DateHistogramMapper

java.lang.Object
  org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.hbase.io.ImmutableBytesWritable,org.apache.hadoop.hbase.client.Result,KEYOUT,VALUEOUT>
      org.apache.hadoop.hbase.mapreduce.TableMapper<org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>
          eu.dicodeproject.analysis.histogram.DateHistogramMapper

public class DateHistogramMapper
extends org.apache.hadoop.hbase.mapreduce.TableMapper<org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

Reads creation dates from HBase and emits years, years+months, years+months+day and individual houts separately as keys with value 1.

Nested Class Summary

static class

DateHistogramMapper.ErrorCases Set of patterns with associated key for later output.

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

DateHistogramMapper()

Method Summary

protected void

map(org.apache.hadoop.hbase.io.ImmutableBytesWritable row, org.apache.hadoop.hbase.client.Result values, org.apache.hadoop.mapreduce.Mapper.Context context) Map

Methods inherited from class org.apache.hadoop.mapreduce.Mapper

cleanup, run, setup

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DateHistogramMapper

public DateHistogramMapper()

Method Detail

map

protected void map(org.apache.hadoop.hbase.io.ImmutableBytesWritable row,
                   org.apache.hadoop.hbase.client.Result values,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws IOException,
                   InterruptedException

Map

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.hbase.io.ImmutableBytesWritable,org.apache.hadoop.hbase.client.Result,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

Throws:

IOException

InterruptedException