org.apache.nutch.crawl
Class DbUpdateReducer

java.lang.Object
  org.apache.hadoop.mapreduce.Reducer<K1,V1,K2,V2>
      org.apache.gora.mapreduce.GoraReducer<UrlWithScore,NutchWritable,String,WebPage>
          org.apache.nutch.crawl.DbUpdateReducer

public class DbUpdateReducer
extends org.apache.gora.mapreduce.GoraReducer<UrlWithScore,NutchWritable,String,WebPage>

Nested Class Summary

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

org.apache.hadoop.mapreduce.Reducer.Context

Field Summary

static String	CRAWLDB_ADDITIONS_ALLOWED
static org.slf4j.Logger	LOG

Constructor Summary

DbUpdateReducer()

Method Summary

protected void	reduce(UrlWithScore key, Iterable<NutchWritable> values, org.apache.hadoop.mapreduce.Reducer.Context context)
protected void	setup(org.apache.hadoop.mapreduce.Reducer.Context context)

Methods inherited from class org.apache.gora.mapreduce.GoraReducer

initReducerJob, initReducerJob, initReducerJob

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

cleanup, run

Methods inherited from class java.lang.Object

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

Field Detail

CRAWLDB_ADDITIONS_ALLOWED

public static final String CRAWLDB_ADDITIONS_ALLOWED

See Also:

Constant Field Values

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

DbUpdateReducer

public DbUpdateReducer()

Method Detail

setup

protected void setup(org.apache.hadoop.mapreduce.Reducer.Context context)
              throws IOException,
                     InterruptedException

Overrides:

setup in class org.apache.hadoop.mapreduce.Reducer<UrlWithScore,NutchWritable,String,WebPage>

Throws:

IOException

InterruptedException

reduce

protected void reduce(UrlWithScore key,
                      Iterable<NutchWritable> values,
                      org.apache.hadoop.mapreduce.Reducer.Context context)
               throws IOException,
                      InterruptedException

Overrides:

reduce in class org.apache.hadoop.mapreduce.Reducer<UrlWithScore,NutchWritable,String,WebPage>

Throws:

IOException

InterruptedException