co.cask.cdap.dq

Class DataQualityApp.AggregationMapper

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<LongWritable,co.cask.cdap.api.stream.GenericStreamEventData<co.cask.cdap.api.data.format.StructuredRecord>,Text,DataQualityWritable>

co.cask.cdap.dq.DataQualityApp.AggregationMapper

All Implemented Interfaces:

ProgramLifecycle<MapReduceContext>

Enclosing class:

DataQualityApp

public static class DataQualityApp.AggregationMapper
extends Mapper<LongWritable,co.cask.cdap.api.stream.GenericStreamEventData<co.cask.cdap.api.data.format.StructuredRecord>,Text,DataQualityWritable>
implements ProgramLifecycle<MapReduceContext>

Take in data and output a field type as a key and a DataQualityWritable containing the field value as an associated value.

Nested Class Summary

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

Mapper.Context

Constructor Summary

Constructors

Constructor and Description
DataQualityApp.AggregationMapper()

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy()
void	initialize(MapReduceContext mapReduceContext)
void	map(LongWritable key, co.cask.cdap.api.stream.GenericStreamEventData<co.cask.cdap.api.data.format.StructuredRecord> event, Mapper.Context context)

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

DataQualityApp.AggregationMapper

public DataQualityApp.AggregationMapper()

Method Detail

initialize

public void initialize(MapReduceContext mapReduceContext)
                throws Exception

Specified by:

initialize in interface ProgramLifecycle<MapReduceContext>

Throws:

Exception

map

public void map(LongWritable key,
       co.cask.cdap.api.stream.GenericStreamEventData<co.cask.cdap.api.data.format.StructuredRecord> event,
       Mapper.Context context)
         throws IOException,
                InterruptedException

Overrides:

map in class Mapper<LongWritable,co.cask.cdap.api.stream.GenericStreamEventData<co.cask.cdap.api.data.format.StructuredRecord>,Text,DataQualityWritable>

Throws:

IOException

InterruptedException

destroy

public void destroy()

Specified by:

destroy in interface ProgramLifecycle<MapReduceContext>